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        10 Contract API jobs in City of London + 20 miles

        Qualtrics Developer

        Experis
        City of London (EC1)
        £500 - £550 per day
        Role Overview 6 months London - Hybrid Inside IR35 - Umbrella Only The Qualtrics Developer will be responsible for designing, configuring, and deploying advanced survey solutions using the Qualtrics platform as part of Toyota Financial Services' Customer Experience Discovery initiative. This role is critical in enabling data driven insights through seamless survey integration, analytics, and reporting. Key Responsibilities * Build branded Qualtrics survey themes aligned with Toyota FS identity. * Develop dynamic, multi-channel surveys (email, portal intercepts, exit intent). * Implement advanced branching logic and variation frameworks for A/B testing. * Configure API connections to CRM systems and Power BI for real-time dashboards. * Ensure secure data handling and compliance with GDPR and Toyota FS standards.
        Role Overview 6 months London - Hybrid Inside IR35 - Umbrella Only The Qualtrics Developer will be responsible for designing, configuring, and deploying advanced survey solutions using the Qualtrics platform as part of Toyota Financial Services' Customer Experience Discovery initiative. This role is critical in enabling data driven insights through seamless survey integration, analytics, and reporting. Key Responsibilities * Build branded Qualtrics survey themes aligned with Toyota FS identity. * Develop dynamic, multi-channel surveys (email, portal intercepts, exit intent). * Implement advanced branching logic and variation frameworks for A/B testing. * Configure API connections to CRM systems and Power BI for real-time dashboards. * Ensure secure data handling and compliance with GDPR and Toyota FS standards.
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        NEWFEATURED
        Description Job Description a. Manage complex FIX implementations and upgrades. c. Diagnose software and connection issues and recommend the appropriate solution. d. Analyze problems, answer questions, and provide training related to the software. e. Identify and test workarounds for bugs or deficiencies in the software and/or associated FIX infrastructure. f. Research issues dealing with third party software. g. Follow a standard set of procedure and methods when responding to customer requests or inquiries. h. Conduct research on questions and issues using available information resources and other FIX Analysts. i. Keep a detailed log of all customer interactions and prepares resolution reports for issues reported by the customer. j. Maintain Best Practices for FIX Onboarding and Integrations. Requirements
        Description Job Description a. Manage complex FIX implementations and upgrades. c. Diagnose software and connection issues and recommend the appropriate solution. d. Analyze problems, answer questions, and provide training related to the software. e. Identify and test workarounds for bugs or deficiencies in the software and/or associated FIX infrastructure. f. Research issues dealing with third party software. g. Follow a standard set of procedure and methods when responding to customer requests or inquiries. h. Conduct research on questions and issues using available information resources and other FIX Analysts. i. Keep a detailed log of all customer interactions and prepares resolution reports for issues reported by the customer. j. Maintain Best Practices for FIX Onboarding and Integrations. Requirements
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        NEW
        Description Job Description a. Manage complex FIX implementations and upgrades. c. Diagnose software and connection issues and recommend the appropriate solution. d. Analyze problems, answer questions, and provide training related to the software. e. Identify and test workarounds for bugs or deficiencies in the software and/or associated FIX infrastructure. f. Research issues dealing with third party software. g. Follow a standard set of procedure and methods when responding to customer requests or inquiries. h. Conduct research on questions and issues using available information resources and other FIX Analysts. i. Keep a detailed log of all customer interactions and prepares resolution reports for issues reported by the customer. j. Maintain Best Practices for FIX Onboarding and Integrations. Requirements
        Description Job Description a. Manage complex FIX implementations and upgrades. c. Diagnose software and connection issues and recommend the appropriate solution. d. Analyze problems, answer questions, and provide training related to the software. e. Identify and test workarounds for bugs or deficiencies in the software and/or associated FIX infrastructure. f. Research issues dealing with third party software. g. Follow a standard set of procedure and methods when responding to customer requests or inquiries. h. Conduct research on questions and issues using available information resources and other FIX Analysts. i. Keep a detailed log of all customer interactions and prepares resolution reports for issues reported by the customer. j. Maintain Best Practices for FIX Onboarding and Integrations. Requirements
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        NEWPREMIUM

        Payment Architect

        Stackstudio Digital Ltd.
        Watford, Hertfordshire
        Unspecified
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
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        Senior Java Software Engineer (Urgent)

        Morson Edge
        Tower Hill, City of London (EC3), E1W 1WY
        £500 - 600 per day
        We are seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited to candidates with experience in regulated environments, financial services, or government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications.
        We are seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited to candidates with experience in regulated environments, financial services, or government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications.
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        Python Engineer

        Bloc Recruitment
        The City, City of London (EC4), EC2R
        £475 per day
        Up to £475 Per day inside IR35 Long term contract Remote UK/EU We’re looking for a BE Engineer to design and build high-quality backend systems and data pipelines that power the analytics platform. You’ll collaborate with engineers and the Product team across the full software lifecycle, leading on scalable services that ingest, transform and deliver data to our frontend applications and customers. You’ll bring strong Python skills, experience with microservices and data ingestion/ETL pipelines, and an eye for clean, maintainable code. Familiarity with AI-assisted dev tools (GitHub Copilot, Cursor, Windsurf, Devin) is a plus — we encourage using them to boost developer velocity and quality. What you’ll do * Design and implement robust, scalable backend services in Python * Own and improve data ingestion & processing pipelines
        Up to £475 Per day inside IR35 Long term contract Remote UK/EU We’re looking for a BE Engineer to design and build high-quality backend systems and data pipelines that power the analytics platform. You’ll collaborate with engineers and the Product team across the full software lifecycle, leading on scalable services that ingest, transform and deliver data to our frontend applications and customers. You’ll bring strong Python skills, experience with microservices and data ingestion/ETL pipelines, and an eye for clean, maintainable code. Familiarity with AI-assisted dev tools (GitHub Copilot, Cursor, Windsurf, Devin) is a plus — we encourage using them to boost developer velocity and quality. What you’ll do * Design and implement robust, scalable backend services in Python * Own and improve data ingestion & processing pipelines
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        Software Engineer (Hardware Integration with .NET)

        IO Associates
        City of London (EC1)
        £600 - £800 per day + Outside IR35 and Hybrid
        Role: Staff Software Engineer Sector: Life Sciences Location: London Days Onsite: 3 per week Day Rate: £800 Outside IR35 Duration: 4 Months then to extend or go Permanent iO Associates have partnered with Life Science Manufacturing company on their search for a Staff Software Engineer who has a strong background in integrating Medical Devices. This role will give you the opportunity to make a real impact in Healthcare and Life Sciences. Essential Requirements * Strong .NET / C# background * Significant experience integrating and communicating with hardware devices * Ability to handle Windows devices, drivers, and communication layers * 8+ years of experience at a staff-level, capable of working autonomously * Not a web-focused developer; needs to be fully hardware-integration oriented Beneficial Experience * gRPC, REST APIs, HTTP * Integrating devices in Life Sciences
        Role: Staff Software Engineer Sector: Life Sciences Location: London Days Onsite: 3 per week Day Rate: £800 Outside IR35 Duration: 4 Months then to extend or go Permanent iO Associates have partnered with Life Science Manufacturing company on their search for a Staff Software Engineer who has a strong background in integrating Medical Devices. This role will give you the opportunity to make a real impact in Healthcare and Life Sciences. Essential Requirements * Strong .NET / C# background * Significant experience integrating and communicating with hardware devices * Ability to handle Windows devices, drivers, and communication layers * 8+ years of experience at a staff-level, capable of working autonomously * Not a web-focused developer; needs to be fully hardware-integration oriented Beneficial Experience * gRPC, REST APIs, HTTP * Integrating devices in Life Sciences
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        FEATURED

        Salesforce Marketing Cloud Engineer

        Stackstudio Digital Ltd.
        Paddington, West London (W2)
        From £450 to £500 per day
        Role / Job Title:Salesforce Marketing Cloud Engineer Work Location:Paddington, London If Hybrid, Number of Days Required in Office:2 days The Role This exciting role will sit within the Marketing Automations team as part of Loyalty Transformation program for a leading UK retailer, executing and delivering high-profile triggered marketing email campaigns to millions of customers. You'll have extensive expertise delivering dynamic emails in line with marketing objectives, using Salesforce Marketing Cloud. You will be responsible for the layout, visual appearance, HTML & AMPScript build and testing of emails to our customer base. You will be able to work at a dynamic pace, with excellent attention to detail, ensuring emails are optimized for all browsers and devices.
        Role / Job Title:Salesforce Marketing Cloud Engineer Work Location:Paddington, London If Hybrid, Number of Days Required in Office:2 days The Role This exciting role will sit within the Marketing Automations team as part of Loyalty Transformation program for a leading UK retailer, executing and delivering high-profile triggered marketing email campaigns to millions of customers. You'll have extensive expertise delivering dynamic emails in line with marketing objectives, using Salesforce Marketing Cloud. You will be responsible for the layout, visual appearance, HTML & AMPScript build and testing of emails to our customer base. You will be able to work at a dynamic pace, with excellent attention to detail, ensuring emails are optimized for all browsers and devices.
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        NEW
        Affinity Water is excited to be growing our Maximo Team, and we are looking for someone who is passionate, curious and ready to make an impact to join us as a Maximo Specialist on a 12 month fixed Term Contract. As a Maximo Specialist, you will be seen as one of the companys resident experts in how Maximo works. In conjunction with IT and business change teams you will be responsible for requirements definition, analysis, and design of Maximo enhancements, automation scripts and integrations. * ESRI GIS Mapping solution * Hi-Affinity CMS * Aurora Streetworks Management system * Waternet Leakage Monitoring system * Oracle Fusion Finance and Procurement system * FLS Visitour Scheduling There is an ambitious road map for the next few years which includes regulatory change, enhancements, small change, and an upgrade to MAS to name a few.
        Affinity Water is excited to be growing our Maximo Team, and we are looking for someone who is passionate, curious and ready to make an impact to join us as a Maximo Specialist on a 12 month fixed Term Contract. As a Maximo Specialist, you will be seen as one of the companys resident experts in how Maximo works. In conjunction with IT and business change teams you will be responsible for requirements definition, analysis, and design of Maximo enhancements, automation scripts and integrations. * ESRI GIS Mapping solution * Hi-Affinity CMS * Aurora Streetworks Management system * Waternet Leakage Monitoring system * Oracle Fusion Finance and Procurement system * FLS Visitour Scheduling There is an ambitious road map for the next few years which includes regulatory change, enhancements, small change, and an upgrade to MAS to name a few.
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        FEATURED

        Solutions Consultant

        Randstad Digital
        City of London (EC1)
        £38.46 - £43.10 per hour
        Role: Solutions Consultant Location: London, UK (Hybrid: 3 days onsite) Role Type: Contract My client, a global technology leader, is seeking a Solutions Consultant to support operational and strategic solution delivery across internal teams and external partners. This is a maternity cover role within a horizontal business function. Responsibilities * Act as a partner to internal teams and external users to translate business needs into scalable solutions * Manage stakeholder relationships and ensure high-quality delivery across the user/partner/client lifecycle * Lead project planning, status reporting, issue tracking, and documentation * Create and maintain repeatable solution content (e.g., best practices, tutorials, support materials) * Identify inefficiencies and contribute to business efficiency plans (BEP)
        Role: Solutions Consultant Location: London, UK (Hybrid: 3 days onsite) Role Type: Contract My client, a global technology leader, is seeking a Solutions Consultant to support operational and strategic solution delivery across internal teams and external partners. This is a maternity cover role within a horizontal business function. Responsibilities * Act as a partner to internal teams and external users to translate business needs into scalable solutions * Manage stakeholder relationships and ensure high-quality delivery across the user/partner/client lifecycle * Lead project planning, status reporting, issue tracking, and documentation * Create and maintain repeatable solution content (e.g., best practices, tutorials, support materials) * Identify inefficiencies and contribute to business efficiency plans (BEP)
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        FEATURED

        82 exact matches jobs are outside your preferred location

        Job Title: Lead Software Developer Location: London, 1-2 days every 2 weeks Duration: until 2-Jan-27 Rate: £400-450 per day - umbrella only * API Development: Design, develop, and maintain robust, scalable APIs using modern frameworks and technologies. * Azure Logic Apps: Configure and integrate Azure Logic Apps to enable seamless workflows and business process automation. * Proficiency Coding Languages JSON, JavaScript, PowerShell & C# * Azure Security: Implement and adhere to best practices in Azure security, including identity management, access control, and threat protection. * Front-End Development: Build responsive and user-friendly front-end interfaces using frameworks such as React, Angular, or Vue.js. * Back-End Development: Develop and maintain server-side logic with programming languages like .NET, Node.js, or Python.
        Job Title: Lead Software Developer Location: London, 1-2 days every 2 weeks Duration: until 2-Jan-27 Rate: £400-450 per day - umbrella only * API Development: Design, develop, and maintain robust, scalable APIs using modern frameworks and technologies. * Azure Logic Apps: Configure and integrate Azure Logic Apps to enable seamless workflows and business process automation. * Proficiency Coding Languages JSON, JavaScript, PowerShell & C# * Azure Security: Implement and adhere to best practices in Azure security, including identity management, access control, and threat protection. * Front-End Development: Build responsive and user-friendly front-end interfaces using frameworks such as React, Angular, or Vue.js. * Back-End Development: Develop and maintain server-side logic with programming languages like .NET, Node.js, or Python.
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        NEWFEATURED
        Lead Technical Test Engineer Remote 3 month contract - potential for extension Outside IR35 £450pd iO are working with an established and rapidly growing Digital agency in their search for an experienced Lead Technical Test Engineer They work with global technology leaders to provide digital transformation services to a number of customers in industries including not-for-profit, financial services and the pubic sector You will bring years of experience, understanding and practical application in all levels and types of testing and a good understanding and usage of AWS services to assist in the set-up and triggering of test conditions. As the Lead Test Engineer, you will support the Test Manager with the strategy and coordinating a small team of Technical Test Engineers * Minimum of 5 years' experience in BOTH testing and test leadership
        Lead Technical Test Engineer Remote 3 month contract - potential for extension Outside IR35 £450pd iO are working with an established and rapidly growing Digital agency in their search for an experienced Lead Technical Test Engineer They work with global technology leaders to provide digital transformation services to a number of customers in industries including not-for-profit, financial services and the pubic sector You will bring years of experience, understanding and practical application in all levels and types of testing and a good understanding and usage of AWS services to assist in the set-up and triggering of test conditions. As the Lead Test Engineer, you will support the Test Manager with the strategy and coordinating a small team of Technical Test Engineers * Minimum of 5 years' experience in BOTH testing and test leadership
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        FEATURED
        Lead Technical Test Engineer Remote 3 month contract - potential for extension Outside IR35 £450pd iO are working with an established and rapidly growing Digital agency in their search for an experienced Lead Technical Test Engineer They work with global technology leaders to provide digital transformation services to a number of customers in industries including not-for-profit, financial services and the pubic sector You will bring years of experience, understanding and practical application in all levels and types of testing and a good understanding and usage of AWS services to assist in the set-up and triggering of test conditions. As the Lead Test Engineer, you will support the Test Manager with the strategy and coordinating a small team of Technical Test Engineers * Minimum of 5 years' experience in BOTH testing and test leadership
        Lead Technical Test Engineer Remote 3 month contract - potential for extension Outside IR35 £450pd iO are working with an established and rapidly growing Digital agency in their search for an experienced Lead Technical Test Engineer They work with global technology leaders to provide digital transformation services to a number of customers in industries including not-for-profit, financial services and the pubic sector You will bring years of experience, understanding and practical application in all levels and types of testing and a good understanding and usage of AWS services to assist in the set-up and triggering of test conditions. As the Lead Test Engineer, you will support the Test Manager with the strategy and coordinating a small team of Technical Test Engineers * Minimum of 5 years' experience in BOTH testing and test leadership
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        FEATURED

        Payment Architect

        Stackstudio Digital Ltd.
        Luton, Bedfordshire
        Unspecified
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
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        Senior Python Software Developer (SC Cleared) Duration: 12 Months Location: London & remote (hybrid) Rate: £650 per day IR35 Status: Inside Start: ASAP A Senior Python Software Developer (SC Cleared) is required for our government client, where you will be working on a specific project where they are transforming and redesigning their data hub, which provides access to a variety of public sector data. We require an experienced full stack developer with extensive Python experience. You will have previous experience developing across a number of services on the front end and back end including Web Services. Proficient in creating good and well documented code and take ownership of the development process. Also to work well with UCD (user centre design) teams and other technical experts on their side.
        Senior Python Software Developer (SC Cleared) Duration: 12 Months Location: London & remote (hybrid) Rate: £650 per day IR35 Status: Inside Start: ASAP A Senior Python Software Developer (SC Cleared) is required for our government client, where you will be working on a specific project where they are transforming and redesigning their data hub, which provides access to a variety of public sector data. We require an experienced full stack developer with extensive Python experience. You will have previous experience developing across a number of services on the front end and back end including Web Services. Proficient in creating good and well documented code and take ownership of the development process. Also to work well with UCD (user centre design) teams and other technical experts on their side.
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        Payment Architect

        Stackstudio Digital Ltd.
        Milton Keynes (MK1)
        Unspecified
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
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        Snyk is the leader in secure AI software development, helping millions of developers develop fast and stay secure as AI transforms how software is built. Our AI-native Developer Security Platform integrates seamlessly into development and security workflows, making it easy to find, fix, and prevent vulnerabilities from code and dependencies to containers and cloud. Our mission is to empower every developer to innovate securely in the AI era boosting productivity while reducing business risk. Were not your average security company - we build Snyk on One Team, Care Deeply, Customer Centric, and Forward Thinking. Its how we stay driven, supportive, and always one step ahead as AI reshapes our world. Our Opportunity As a Senior Software Engineer, youll play a key role in shaping how modern organizations build and secure software at scale.
        Snyk is the leader in secure AI software development, helping millions of developers develop fast and stay secure as AI transforms how software is built. Our AI-native Developer Security Platform integrates seamlessly into development and security workflows, making it easy to find, fix, and prevent vulnerabilities from code and dependencies to containers and cloud. Our mission is to empower every developer to innovate securely in the AI era boosting productivity while reducing business risk. Were not your average security company - we build Snyk on One Team, Care Deeply, Customer Centric, and Forward Thinking. Its how we stay driven, supportive, and always one step ahead as AI reshapes our world. Our Opportunity As a Senior Software Engineer, youll play a key role in shaping how modern organizations build and secure software at scale.
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        NEW

        Flexible Pipe Engineer

        First Technical Recruitment
        Basingstoke, Hampshire
        Market related
        Senior Flexible Pipe Engineer UK – Basingstoke (Hybrid Working) Worker Status: PAYE Only Contract Duration: Minimum 12 Months SmartWorking (Hybrid Working) The company supports flexible working through its SmartWorking policy. Personnel may work up to 12 working days per month from home (or another secure UK location). These days remain available even during months where leave is taken—typically offering employees the opportunity for approximately 60% remote working. The Role: Senior Engineer, Flexible Pipe We are seeking a highly capable Senior Flexible Pipe Engineer to support Eni’s global offshore deepwater projects. Based within the engineering group in Basingstoke, you will deliver specialist engineering expertise across all project phases—from feasibility studies and concept development through FEED, tendering, and execution.
        Senior Flexible Pipe Engineer UK – Basingstoke (Hybrid Working) Worker Status: PAYE Only Contract Duration: Minimum 12 Months SmartWorking (Hybrid Working) The company supports flexible working through its SmartWorking policy. Personnel may work up to 12 working days per month from home (or another secure UK location). These days remain available even during months where leave is taken—typically offering employees the opportunity for approximately 60% remote working. The Role: Senior Engineer, Flexible Pipe We are seeking a highly capable Senior Flexible Pipe Engineer to support Eni’s global offshore deepwater projects. Based within the engineering group in Basingstoke, you will deliver specialist engineering expertise across all project phases—from feasibility studies and concept development through FEED, tendering, and execution.
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        Salesforce Tech Lead

        Stackstudio Digital Ltd.
        Windsor (SL4)
        From £450 to £475 per day
        Job Title:Salesforce Tech Lead Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
        Job Title:Salesforce Tech Lead Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
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        Role/Job Title: PaaS Technical Architect (Azure PaaS) Work Location: London, UK Mode of Working Hybrid/Office Based: Hybrid If Hybrid, how many days are required in office? 3 The Role The associate needs to play a key role in modernizing critical service domains such as scheduling, delivery, and customer engagement by designing scalable, cloud-native solutions on Microsoft Azure. Operating in a rapidly evolving logistics sector, they will leverage cutting-edge Azure PaaS technologies (App Services, Functions, API Management, etc.) to drive efficiency, reliability, and innovation across high-impact national projects. You would be working for the largest postal/parcels services provider in the UK. * Design and lead end-to-end Azure PaaS architectures for application migration and modernization.
        Role/Job Title: PaaS Technical Architect (Azure PaaS) Work Location: London, UK Mode of Working Hybrid/Office Based: Hybrid If Hybrid, how many days are required in office? 3 The Role The associate needs to play a key role in modernizing critical service domains such as scheduling, delivery, and customer engagement by designing scalable, cloud-native solutions on Microsoft Azure. Operating in a rapidly evolving logistics sector, they will leverage cutting-edge Azure PaaS technologies (App Services, Functions, API Management, etc.) to drive efficiency, reliability, and innovation across high-impact national projects. You would be working for the largest postal/parcels services provider in the UK. * Design and lead end-to-end Azure PaaS architectures for application migration and modernization.
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        At BNY, our culture allows us to run our company better and enables employees growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the worlds investible assets. Every day, our teams harness cutting-edge AI and breakthrough technologies to collaborate with clients, driving transformative solutions that redefine industries and uplift communities worldwide. Recognized as a top destination for innovators, BNY is where bold ideas meet advanced technology and exceptional talent. Together, we power the future of finance and this is what #LifeAtBNY is all about. Join us and be part of something extraordinary. The Markets business helps our clients formulate, implement and operationalize their investment strategies.
        At BNY, our culture allows us to run our company better and enables employees growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the worlds investible assets. Every day, our teams harness cutting-edge AI and breakthrough technologies to collaborate with clients, driving transformative solutions that redefine industries and uplift communities worldwide. Recognized as a top destination for innovators, BNY is where bold ideas meet advanced technology and exceptional talent. Together, we power the future of finance and this is what #LifeAtBNY is all about. Join us and be part of something extraordinary. The Markets business helps our clients formulate, implement and operationalize their investment strategies.
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        Role: C++ Developer Type: Contract (6 Months) Location: UK (Fully Remote) Technical Essentials (Must Haves) * Senior-level C++ expertise with many years of experience. * Strong debugging skills and a proactive test mindset-you will spend significant time triaging issues and mastering system design. Core Developer Traits * Enjoys context shifting and jumping between different projects and domains rapidly. * Overcommunicator who ensures strict alignment to prevent wasted time and effort. * Excellent communication skills-ability to simplify highly complex technical domain information for stakeholders. * A collaborative team player who actively leverages the knowledge of peers. Bonus Experience (Highly Desirable) * Familiarity with playback and orchestration APIs. * Experience in consumer multimedia software (e.g., Netflix, Amazon).
        Role: C++ Developer Type: Contract (6 Months) Location: UK (Fully Remote) Technical Essentials (Must Haves) * Senior-level C++ expertise with many years of experience. * Strong debugging skills and a proactive test mindset-you will spend significant time triaging issues and mastering system design. Core Developer Traits * Enjoys context shifting and jumping between different projects and domains rapidly. * Overcommunicator who ensures strict alignment to prevent wasted time and effort. * Excellent communication skills-ability to simplify highly complex technical domain information for stakeholders. * A collaborative team player who actively leverages the knowledge of peers. Bonus Experience (Highly Desirable) * Familiarity with playback and orchestration APIs. * Experience in consumer multimedia software (e.g., Netflix, Amazon).
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        FEATURED
        Location: Client sites, remote, or hybrid, depending on project need. Contract Type: Contract About Us Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale projects, you'll be trusted, challenged, and empowered to grow. We nurture learning through communities of practice and encourage creativity, autonomy, and innovation.
        Location: Client sites, remote, or hybrid, depending on project need. Contract Type: Contract About Us Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale projects, you'll be trusted, challenged, and empowered to grow. We nurture learning through communities of practice and encourage creativity, autonomy, and innovation.
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        TM Forum SOM Architect

        Stackstudio Digital Ltd.
        Windsor (SL4)
        From £425 to £450 per day
        Job Description Job Title:TM Forum SOM Architect Windsor, UKHybrid (visit to office once every week) Own the TMF-aligned SOM architecture across order capture, decomposition, orchestration, lifecycle, and fulfilment integration. Apply TMF 641/640/638 patterns consistently across all product lines. Maintain SOM architectural guardrails to ensure coherence across squads. Partner closely with the COM Lead and Salesforce Programme Architect to maintain COM SOM Fulfilment cohesion. Ensure SOM consumes COM outputs correctly, without premature assetisation or over-decomposition. Align EPC COM SOM Fulfilment flows to ensure consistent modelling. Define orchestration logic across multi-product, multi-step journeys. Design integrations with billing, CRM, field services, scheduling, inventory, and partners.
        Job Description Job Title:TM Forum SOM Architect Windsor, UKHybrid (visit to office once every week) Own the TMF-aligned SOM architecture across order capture, decomposition, orchestration, lifecycle, and fulfilment integration. Apply TMF 641/640/638 patterns consistently across all product lines. Maintain SOM architectural guardrails to ensure coherence across squads. Partner closely with the COM Lead and Salesforce Programme Architect to maintain COM SOM Fulfilment cohesion. Ensure SOM consumes COM outputs correctly, without premature assetisation or over-decomposition. Align EPC COM SOM Fulfilment flows to ensure consistent modelling. Define orchestration logic across multi-product, multi-step journeys. Design integrations with billing, CRM, field services, scheduling, inventory, and partners.
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        Position: Backend Engineer Location: Remote (UK) Work Type: Contract Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
        Position: Backend Engineer Location: Remote (UK) Work Type: Contract Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
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        FEATURED

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        What is the average salary for API in City of London?

        Average salary per year
        £82,499

        The average salary for a API in City of London is £82,499. API in City of London salaries range from £64,999 to £92,499.

        Frequently Asked Questions

        How many contract API jobs are there in City of London?
        There are 10 contract API jobs within 20 miles of City of London available on Jobsite right now.

        What other similar jobs are there to contract API jobs in City of London?
        As well as contract API jobs in City of London, you can find contract IT, Software Development, Management, amongst many others.