Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
- The City, City (EC4)
- Shoreditch
- Hinxton
- Southwark
- St James
- Arundel Heights
- Datchet Common
- Euston
- Harmondsworth
- Ireland
- City of London
- Central London
- Milton Keynes
- West End
- Reading
- East London
- South East London
- South West London
- Southampton
- Stevenage
- London
- Berkshire
- Buckinghamshire
- Hampshire
- Hertfordshire
- Essex
- Surrey
- West Sussex
- Bedfordshire
- Oxfordshire
- South East
55 Contract API jobs in New Malden + 20 miles
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Full Stack Engineer TypeScript API React
Full Stack Engineer TypeScript API React
Client Server
Shoreditch, East London (E1), EC2A
£50000 - £60000 per annum + benefits
Full Stack Engineer / Developer (TypeScript API React) London / WFH to £60k Are you a bright, ambitious technologist who enjoys working with a range of programming languages across the full tech stack? You could progress your career at a scaling tech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically, improving liquidity and efficiency for all participants as the platform scales.
Full Stack Engineer / Developer (TypeScript API React) London / WFH to £60k Are you a bright, ambitious technologist who enjoys working with a range of programming languages across the full tech stack? You could progress your career at a scaling tech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically, improving liquidity and efficiency for all participants as the platform scales.
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Senior Backend Engineer TypeScript Node API
Senior Backend Engineer TypeScript Node API
Client Server
The City, City of London (EC4), EC2V
£85000 - £100000 per annum + shares + benefits
Senior Backend Engineer / Developer (TypeScript Node API) London / WFH to £100k Are you a senior technologist looking for an opportunity to progress your career in a hands-on role where you can make an impact? You could be joining a scaling tech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically - improving liquidity and efficiency for all participants as the platform scales. As a Senior Backend Engineer you will collaborate with a small team of technologists and successful entrepreneurs to design and implement intelligent solutions to business needs, with a focus on TypeScript and Node backend systems but also with exposure to and occasional frontend work.
Senior Backend Engineer / Developer (TypeScript Node API) London / WFH to £100k Are you a senior technologist looking for an opportunity to progress your career in a hands-on role where you can make an impact? You could be joining a scaling tech company that has developed a digital distribution platform transforming electronic trading in the institutional FX options market via a central marketplace where institutions can place, discover and match option interests electronically - improving liquidity and efficiency for all participants as the platform scales. As a Senior Backend Engineer you will collaborate with a small team of technologists and successful entrepreneurs to design and implement intelligent solutions to business needs, with a focus on TypeScript and Node backend systems but also with exposure to and occasional frontend work.
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Senior Azure Developer (Azure, SDK, Node)
Senior Azure Developer (Azure, SDK, Node)
MS Talent Ltd
The City, City of London (EC2), EC2M
£400 - £450 per day, Benefits Outside IR35
Senior / Lead Azure Developer (Azure Developer, Microsoft Azure, Node.js, Microsoft SDK, Graph API) Bring a new custom application to the market! Location no issue - work from home! 6 month contract, £400 - £450 per day OUTSIDE IR35. Remote role in the UK. We are looking for a Senior Azure Developer / Lead Azure Developerwho specialises in building custom M365 applications that sit on Microsoft Azure. This role is for an Azure Developerwith deep experience using Microsoft SDKs, Graph API and enterprise integrations, not just front-end frameworks. You will be the hands-on technical ownerof a bespoke Microsoft Azure application, built using Node.jsand integrated with Microsoft enterprise services. * Proven experience as a Senior Azure Developerbuilding custom Microsoft Azure applications * Strong Node.js developmentexperience in an Azure Developerenvironment
Senior / Lead Azure Developer (Azure Developer, Microsoft Azure, Node.js, Microsoft SDK, Graph API) Bring a new custom application to the market! Location no issue - work from home! 6 month contract, £400 - £450 per day OUTSIDE IR35. Remote role in the UK. We are looking for a Senior Azure Developer / Lead Azure Developerwho specialises in building custom M365 applications that sit on Microsoft Azure. This role is for an Azure Developerwith deep experience using Microsoft SDKs, Graph API and enterprise integrations, not just front-end frameworks. You will be the hands-on technical ownerof a bespoke Microsoft Azure application, built using Node.jsand integrated with Microsoft enterprise services. * Proven experience as a Senior Azure Developerbuilding custom Microsoft Azure applications * Strong Node.js developmentexperience in an Azure Developerenvironment
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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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Were looking for a highly skilled Quantitative Developer to join our dynamic team. This is an opportunity to work on cutting-edge financial products and deliver robust, production-quality code that powers critical trading and risk systems. Youll collaborate closely with quants and traders to design and implement solutions that make a real impact. What Youll Do * Develop high-performance applications in C# or C++, with code deployed in production environments. * Design and implement system architecture and APIs for complex financial workflows. * Apply strong quantitative and mathematical skills to model and solve challenging problems. * Work with a broad range of financial products, including rates, FX, inflation, and credit. What Were Looking For * Proven experience in high-level programming (C# or C++). * Strong background in system/API design.
Were looking for a highly skilled Quantitative Developer to join our dynamic team. This is an opportunity to work on cutting-edge financial products and deliver robust, production-quality code that powers critical trading and risk systems. Youll collaborate closely with quants and traders to design and implement solutions that make a real impact. What Youll Do * Develop high-performance applications in C# or C++, with code deployed in production environments. * Design and implement system architecture and APIs for complex financial workflows. * Apply strong quantitative and mathematical skills to model and solve challenging problems. * Work with a broad range of financial products, including rates, FX, inflation, and credit. What Were Looking For * Proven experience in high-level programming (C# or C++). * Strong background in system/API design.
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We are looking for an experienced Appian Developer to support integration and automation initiatives within a leading financial services organisation. This role focuses on connecting systems, automating complex business processes, and improving operational efficiency. * Design, develop, and maintain Appian applications to support fraud and spam prevention workflows. * Build and manage system integrations (APIs, web services, and third-party platforms) * Automate business processes to improve accuracy, speed, and resilience. * Working with offshore teams to complete end-to-end delivery, from requirements gathering to deployment * Ensure solutions meet security, compliance, and performance standards expected in financial services. * Must have proven experience as an Appian Developer. * Must have a strong background in system integration, process automation and APIs.
We are looking for an experienced Appian Developer to support integration and automation initiatives within a leading financial services organisation. This role focuses on connecting systems, automating complex business processes, and improving operational efficiency. * Design, develop, and maintain Appian applications to support fraud and spam prevention workflows. * Build and manage system integrations (APIs, web services, and third-party platforms) * Automate business processes to improve accuracy, speed, and resilience. * Working with offshore teams to complete end-to-end delivery, from requirements gathering to deployment * Ensure solutions meet security, compliance, and performance standards expected in financial services. * Must have proven experience as an Appian Developer. * Must have a strong background in system integration, process automation and APIs.
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Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Overview We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud.
Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Overview We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud.
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Cloud Solution Architect
Cloud Solution Architect
International Business Solutions Consulting Limited
Soho, Central London (W1), W1D
£500 per day
Cloud Platform Engineering Lead My client, a large consultancy, is in need of a Cloud Platform Engineering Lead for a 6 month contract inside IR35 based in London offering 2 days per week remote but requiring 3 days per week on-site. The ideal candidate will have strong experience in delivering large-scale, fault-tolerant systems; setting SLOs/SLIs, Terraform and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker), Containers & orchestration (Kubernetes) and service mesh (eg, Istio), API design & security (REST/OpenAPI, mTLS, authN/Z), Scripting in Bash, PowerShell, or Python, Cloud Expertise (Depth in One, Ready to Cross-Train), Azure: ARM/Bicep, AKS, Application Gateway, API Management, Azure Storage, GCP: GKE, Cloud Load Balancing, Cloud Armor, Istio, Stackdriver, Jenkins, Apigee.
Cloud Platform Engineering Lead My client, a large consultancy, is in need of a Cloud Platform Engineering Lead for a 6 month contract inside IR35 based in London offering 2 days per week remote but requiring 3 days per week on-site. The ideal candidate will have strong experience in delivering large-scale, fault-tolerant systems; setting SLOs/SLIs, Terraform and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker), Containers & orchestration (Kubernetes) and service mesh (eg, Istio), API design & security (REST/OpenAPI, mTLS, authN/Z), Scripting in Bash, PowerShell, or Python, Cloud Expertise (Depth in One, Ready to Cross-Train), Azure: ARM/Bicep, AKS, Application Gateway, API Management, Azure Storage, GCP: GKE, Cloud Load Balancing, Cloud Armor, Istio, Stackdriver, Jenkins, Apigee.
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Full-Stack Software Developer
Full-Stack Software Developer
Sanderson Government and Defence
City of London (EC1), EC1
Up to £520 per day
Role: Software Developer Day Rate: £520p/d Inside IR35 Location: Central London (hybrid up to 2 days a week) Clearance required: ACTIVE SC & NPPV3 clearance. Duration: initial work package until March 2026 (scope for extension as a long-term programme) We're looking for an expert Full-Stack Java Engineer to join a high-profile, fast-moving government programme with a fixed deadline. You'll work in a large team building microservices, scalable APIs, optimised SQL, and fully containerised deployments on AWS. You'll also collaborate directly with senior stakeholders, turning complex problems into tested, working solutions. What You'll Do * Build and deploy backend services with Java & Spring Boot * Develop scalable APIs * Optimise SQL for large datasets * Work with DevOps on Docker and AWS deployments * Shape architecture and technical direction
Role: Software Developer Day Rate: £520p/d Inside IR35 Location: Central London (hybrid up to 2 days a week) Clearance required: ACTIVE SC & NPPV3 clearance. Duration: initial work package until March 2026 (scope for extension as a long-term programme) We're looking for an expert Full-Stack Java Engineer to join a high-profile, fast-moving government programme with a fixed deadline. You'll work in a large team building microservices, scalable APIs, optimised SQL, and fully containerised deployments on AWS. You'll also collaborate directly with senior stakeholders, turning complex problems into tested, working solutions. What You'll Do * Build and deploy backend services with Java & Spring Boot * Develop scalable APIs * Optimise SQL for large datasets * Work with DevOps on Docker and AWS deployments * Shape architecture and technical direction
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Required Skills & Experience * 10+ years in enterprise frontend engineering in AI/data environments. * Expertise in Tableau and/or PowerBI for rapid prototyping and stakeholder engagement * Deep hands-on experience with modern frontend frameworks (React, Typescript, etc) * Hands-on experience with cloud platforms (AWS preferred); familiarity with scalable deployment and integration * Strong knowledge of API integration. * Proven experience in developing, testing, and deploying robust frontend solutions into production environments, ensuring reliability, scalability, and maintainability beyond proof-of-concept or prototype stages. * Familiarity with airline or logistics data domains is a plus. * Significant experience in similar roles, with a proven ability to integrate quickly into new teams and deliver immediate value.
Required Skills & Experience * 10+ years in enterprise frontend engineering in AI/data environments. * Expertise in Tableau and/or PowerBI for rapid prototyping and stakeholder engagement * Deep hands-on experience with modern frontend frameworks (React, Typescript, etc) * Hands-on experience with cloud platforms (AWS preferred); familiarity with scalable deployment and integration * Strong knowledge of API integration. * Proven experience in developing, testing, and deploying robust frontend solutions into production environments, ensuring reliability, scalability, and maintainability beyond proof-of-concept or prototype stages. * Familiarity with airline or logistics data domains is a plus. * Significant experience in similar roles, with a proven ability to integrate quickly into new teams and deliver immediate value.
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A leading financial services client in London is seeking a talented AI Automation Engineer to join their team on a contract basis. Please see below for key details. Role Overview: Analyse and optimise business processes for automation whilst designing, building, and deploying intelligent automation solutions using BPA platforms (Appian), Machine Learning, and Generative AI to drive operational efficiency and innovation. 1. Process Analysis & Optimisation - Expert in analysing existing business processes through stakeholder interviews, process mapping, and workflow documentation to identify automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. 2.
A leading financial services client in London is seeking a talented AI Automation Engineer to join their team on a contract basis. Please see below for key details. Role Overview: Analyse and optimise business processes for automation whilst designing, building, and deploying intelligent automation solutions using BPA platforms (Appian), Machine Learning, and Generative AI to drive operational efficiency and innovation. 1. Process Analysis & Optimisation - Expert in analysing existing business processes through stakeholder interviews, process mapping, and workflow documentation to identify automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. 2.
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Business Analyst
Business Analyst
REC SOLUTIONS LIMITED
The City, City of London (EC4), EC4N
Competitive base salary plus bonus and benefits
***Hybrid, 3 days a week in the office 2 days remote*** An excellent opportunity has arisen for a Business Analyst to join a forward thinking, innovative exchange based in the City, London working with some cutting edge technologies. Benefits (not exhaustive list) - Business Analyst (FinTech, Financial Services, Trading, Equities, Equity) * Competitive salary * 25 days annual leave - not including bank holidays * Can opt to join Private Medical insurance scheme * Hybrid working * Flexible working hours * Company pension * Group Policies Life Assurance, Income Protection and Critical Illness * Discretionary bonus * Can opt to join Electric Car Scheme * Enhanced Maternity and Paternity Policy * Can opt to join Workplace Nursery Scheme * Length of service holiday entitlement
***Hybrid, 3 days a week in the office 2 days remote*** An excellent opportunity has arisen for a Business Analyst to join a forward thinking, innovative exchange based in the City, London working with some cutting edge technologies. Benefits (not exhaustive list) - Business Analyst (FinTech, Financial Services, Trading, Equities, Equity) * Competitive salary * 25 days annual leave - not including bank holidays * Can opt to join Private Medical insurance scheme * Hybrid working * Flexible working hours * Company pension * Group Policies Life Assurance, Income Protection and Critical Illness * Discretionary bonus * Can opt to join Electric Car Scheme * Enhanced Maternity and Paternity Policy * Can opt to join Workplace Nursery Scheme * Length of service holiday entitlement
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Senior Java Software Engineer (Urgent)
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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1 year Contract. Remote £490 per day. Inside IR35 Our Central Government client is looking for an experienced Data Engineer to work on a brand new AI-focused Digital project in a GDS environment. Technical Responsibilities * Build and maintain data pipelines in Azure (ADF, Databricks, Key Vault). * Develop ingestion workflows for APIs, structured data, and CSV sources. * Implement Infrastructure as Code (Bicep) for Dev/Test environments. * Deliver Bronze and Silver layer transformations using Python and SQL. * Create data validation and data quality reporting processes. * Support integration across systems (IDS/Postgres, Dataverse CRM, Web App platform). * Implement secure, role-based data access controls. * Ensure code quality, scalability, and compliance with DfE technical and security standards. Delivery and Collaboration
1 year Contract. Remote £490 per day. Inside IR35 Our Central Government client is looking for an experienced Data Engineer to work on a brand new AI-focused Digital project in a GDS environment. Technical Responsibilities * Build and maintain data pipelines in Azure (ADF, Databricks, Key Vault). * Develop ingestion workflows for APIs, structured data, and CSV sources. * Implement Infrastructure as Code (Bicep) for Dev/Test environments. * Deliver Bronze and Silver layer transformations using Python and SQL. * Create data validation and data quality reporting processes. * Support integration across systems (IDS/Postgres, Dataverse CRM, Web App platform). * Implement secure, role-based data access controls. * Ensure code quality, scalability, and compliance with DfE technical and security standards. Delivery and Collaboration
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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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My London based client is looking to recruit an experienced Senior QA and Test Analyst with in depth expertise working with TOSCA. Working in the Quality Assurance and Test team this role sits within the SAP platform division and reports in to the Product & Platform QA and Test Manager. Within this lead role, you will be tasked with ensuring quality outcomes align with business strategy - focusing specifically on all SAP systems and integrated app interfaces for both Finance and HR systems automation. * Champion quality and enable successful change, engaging with all stakeholders * Ensure rapid delivery is supported through test automation, test tools and best practice * Ensure quality needs and expectations are met * Ensure stakeholders have access to quality information * Lead at all levels of the Quality lifecycle * Inform and align on Quality approach
My London based client is looking to recruit an experienced Senior QA and Test Analyst with in depth expertise working with TOSCA. Working in the Quality Assurance and Test team this role sits within the SAP platform division and reports in to the Product & Platform QA and Test Manager. Within this lead role, you will be tasked with ensuring quality outcomes align with business strategy - focusing specifically on all SAP systems and integrated app interfaces for both Finance and HR systems automation. * Champion quality and enable successful change, engaging with all stakeholders * Ensure rapid delivery is supported through test automation, test tools and best practice * Ensure quality needs and expectations are met * Ensure stakeholders have access to quality information * Lead at all levels of the Quality lifecycle * Inform and align on Quality approach
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Role - .Net Engineer Location - Hybrid, Home and twice a month onsite (multiple locations) Contract - Initial 3 months, high probability of extension to 2027 Rate - £475 to £525 per day Start - ASAP This role has been deemed Inside IR35. You must hold active SC Clearance to be eligible for this role. The Opportunity We are working in partnership with a leading defence systems integrator to recruit a .Net Engineer for a major long-term programme of work. This is an exciting opportunity to join a highly capable engineering team delivering innovative software solutions across complex and mission-critical environments. If you’re looking to broaden your technical exposure; particularly across modern data platforms and integration technologies—this role offers the chance to grow within a dynamic, fast-moving setting where no two challenges are the same. The Role
Role - .Net Engineer Location - Hybrid, Home and twice a month onsite (multiple locations) Contract - Initial 3 months, high probability of extension to 2027 Rate - £475 to £525 per day Start - ASAP This role has been deemed Inside IR35. You must hold active SC Clearance to be eligible for this role. The Opportunity We are working in partnership with a leading defence systems integrator to recruit a .Net Engineer for a major long-term programme of work. This is an exciting opportunity to join a highly capable engineering team delivering innovative software solutions across complex and mission-critical environments. If you’re looking to broaden your technical exposure; particularly across modern data platforms and integration technologies—this role offers the chance to grow within a dynamic, fast-moving setting where no two challenges are the same. The Role
Software Engineering Lead Java AI - FinTech
Software Engineering Lead Java AI - FinTech
Client Server
Shoreditch, East London (E1), EC2A
£120000 - £140000 per annum + bonus + benefits
Software Engineering Lead (Java AI) London / WFH to £140k Are you a technical leader with a strong knowledge of AI and its practical uses within software engineering? You could be progressing your career in a senior, hands-on Engineering Manager role at a global FinTech / CFD trading company that has been consistently voted as one of the UKs top employers. As a Software Engineering Lead you'll head up a team of nine Software Engineers whilst remaining hands-on with coding. Your primary focus will be on using Claude code (and other AI tools and frameworks) throughout the development lifecycle from initial requirements shaping through to deployment to improve speed and efficiency of software development and release.
Software Engineering Lead (Java AI) London / WFH to £140k Are you a technical leader with a strong knowledge of AI and its practical uses within software engineering? You could be progressing your career in a senior, hands-on Engineering Manager role at a global FinTech / CFD trading company that has been consistently voted as one of the UKs top employers. As a Software Engineering Lead you'll head up a team of nine Software Engineers whilst remaining hands-on with coding. Your primary focus will be on using Claude code (and other AI tools and frameworks) throughout the development lifecycle from initial requirements shaping through to deployment to improve speed and efficiency of software development and release.
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Software Engineer (Hardware Integration with .NET)
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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React Developer TypeScript - Hedge Fund
React Developer TypeScript - Hedge Fund
Client Server
Victoria, South West London (SW1), SW1H
£80000 - £95000 per annum + bonus + benefits
React Developer / Front End Engineer (React v19 TypeScript) London / WFH to £95k Do you have expertise with React? You could be progressing your career at a Hedge Fund with complex work and substantial bonus earning potential. As a React Developer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript * You are experienced with other web technologies such as HTML, CSS, Web APIs
React Developer / Front End Engineer (React v19 TypeScript) London / WFH to £95k Do you have expertise with React? You could be progressing your career at a Hedge Fund with complex work and substantial bonus earning potential. As a React Developer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript * You are experienced with other web technologies such as HTML, CSS, Web APIs
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Urgent 12-month Hybrid AI/Machine Learning (ML) engineer role paying £400 a day inside IR35 in central London with 2-3 days in the office a week. Start before Christmas, I need to send candidates today for this to be possible. Interviews next week apply asap/Today Build and optimize AI/ML pipelines for predictive modelling, NLP, and generative AI applications. Perform Exploratory Data Analysis (EDA), data mining, and visualization to extract insights. Design and implement Big Data solutions using Hadoop, Spark, PySpark, and Data Lake architectures. Develop and deploy ML models (supervised, unsupervised, tree-based, ensemble methods). Implement deep learning architectures (CNN, RNN, LSTM) using TensorFlow, PyTorch, and Keras. Work on NLP and Generative AI tasks including embeddings, transformers (BERT, GPT), and OpenAI APIs.
Urgent 12-month Hybrid AI/Machine Learning (ML) engineer role paying £400 a day inside IR35 in central London with 2-3 days in the office a week. Start before Christmas, I need to send candidates today for this to be possible. Interviews next week apply asap/Today Build and optimize AI/ML pipelines for predictive modelling, NLP, and generative AI applications. Perform Exploratory Data Analysis (EDA), data mining, and visualization to extract insights. Design and implement Big Data solutions using Hadoop, Spark, PySpark, and Data Lake architectures. Develop and deploy ML models (supervised, unsupervised, tree-based, ensemble methods). Implement deep learning architectures (CNN, RNN, LSTM) using TensorFlow, PyTorch, and Keras. Work on NLP and Generative AI tasks including embeddings, transformers (BERT, GPT), and OpenAI APIs.
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DeFi Remote Up to $250k Plexus has another great opportunity with one of our clients that are a non-custodial crypto trading and data platform built for speed, accuracy, and full user control. They provide a unified base of operations where traders keep custody of their funds, access live market data, execute instantly, and trade even the newest markets with powerful, intuitive tools. they keep there team intentionally small, bringing together only the most exceptional talent in crypto. They are looking for a backend engineer experienced in building high-performance, low-latency microservices in TypeScript. Responsibilities * Backend Development: Build and maintain scalable TypeScript services for trading, analytics, and integrations. * Cross-Team Collaboration: Work with designers, product, and users to align backend solutions with platform needs.
DeFi Remote Up to $250k Plexus has another great opportunity with one of our clients that are a non-custodial crypto trading and data platform built for speed, accuracy, and full user control. They provide a unified base of operations where traders keep custody of their funds, access live market data, execute instantly, and trade even the newest markets with powerful, intuitive tools. they keep there team intentionally small, bringing together only the most exceptional talent in crypto. They are looking for a backend engineer experienced in building high-performance, low-latency microservices in TypeScript. Responsibilities * Backend Development: Build and maintain scalable TypeScript services for trading, analytics, and integrations. * Cross-Team Collaboration: Work with designers, product, and users to align backend solutions with platform needs.
A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you’ll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. * Produce well-structured and clearly documented C# / .NET code. * Configure, customise, and maintain Microsoft Dynamics 365. * Build and support integrations across Dynamics 365 and other systems. * Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. * Work seamlessly with cross-functional teams in a fully remote setting. * Take part in code reviews and contribute to help define best practices.
A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you’ll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. * Produce well-structured and clearly documented C# / .NET code. * Configure, customise, and maintain Microsoft Dynamics 365. * Build and support integrations across Dynamics 365 and other systems. * Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. * Work seamlessly with cross-functional teams in a fully remote setting. * Take part in code reviews and contribute to help define best practices.
About Loopla Loopla is a London-based family events marketplace helping parents discover and book activities for their children. Were a small engineering team, moving quickly and building the tools that power both family discovery and organiser growth. Every engineer has real ownership and impact. The Role Were looking for a Senior Full Stack Engineer who enjoys solving hard problems, takes initiative, and cares about building things properly. Youll work across the stack, own major features end to end, and help shape the direction of a growing product. This is a hybrid role: 3 days in our Euston office, 2 days remote. We may be relocating to Stratford in the coming months, and the hybrid pattern would remain the same. Responsibilities * Lead feature planning and turn ideas into well-scoped, buildable work * Build reliable, maintainable frontend and backend systems
About Loopla Loopla is a London-based family events marketplace helping parents discover and book activities for their children. Were a small engineering team, moving quickly and building the tools that power both family discovery and organiser growth. Every engineer has real ownership and impact. The Role Were looking for a Senior Full Stack Engineer who enjoys solving hard problems, takes initiative, and cares about building things properly. Youll work across the stack, own major features end to end, and help shape the direction of a growing product. This is a hybrid role: 3 days in our Euston office, 2 days remote. We may be relocating to Stratford in the coming months, and the hybrid pattern would remain the same. Responsibilities * Lead feature planning and turn ideas into well-scoped, buildable work * Build reliable, maintainable frontend and backend systems
Full Stack Engineer Python TypeScript
Full Stack Engineer Python TypeScript
Client Server
St James, South West London (SW1), SW1A
£100000 - £120000 per annum + bonus + benefits
Full Stack Engineer / Developer (Python TypeScript) London / WFH to £120k Are you a technologist with start-up experience looking for your next opportunity? You could be progressing your career at a tech start-up that is producing an AI native data pipelining platform. As a Full Stack Engineer within a small team, you will build and implement new features across the full tech stack, with a focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product vision and strategy playing a pivotal role in the company's success. You'll join colleagues in the London office (close to Waterloo) with flexibility to work from home twice a week.
Full Stack Engineer / Developer (Python TypeScript) London / WFH to £120k Are you a technologist with start-up experience looking for your next opportunity? You could be progressing your career at a tech start-up that is producing an AI native data pipelining platform. As a Full Stack Engineer within a small team, you will build and implement new features across the full tech stack, with a focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product vision and strategy playing a pivotal role in the company's success. You'll join colleagues in the London office (close to Waterloo) with flexibility to work from home twice a week.
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