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        106 Contract API jobs in Hertfordshire + 20 miles

        Software Engineering Lead

        Dignity Funerals Limited
        Maidenhead Court, SL6 8LT
        Up to £110,000 per annum
        Contract: Full-Time, Permanent Location: Maidenhead, Berkshire (Hybrid flexible, 3 days office) Salary: Up to £110,000 per annum At Dignity and Farewill, we're redefining what end-of-life services can look and feel like - modern, compassionate, accessible. As we combine the scale and experience of Dignity with Farewill's tech-driven innovation, we're building a next-generation platform to support families at one of life's most important moments. We're looking for a Software Engineering Lead to join our growing technology team and help drive this transformation. This is a hands-on technical leadership role, responsible for guiding one of our key product domains - whether that's Funeral Plans, Legal Services, or At-Need Funerals - from strategy through to scalable, secure software delivery. What you'll be doing
        Contract: Full-Time, Permanent Location: Maidenhead, Berkshire (Hybrid flexible, 3 days office) Salary: Up to £110,000 per annum At Dignity and Farewill, we're redefining what end-of-life services can look and feel like - modern, compassionate, accessible. As we combine the scale and experience of Dignity with Farewill's tech-driven innovation, we're building a next-generation platform to support families at one of life's most important moments. We're looking for a Software Engineering Lead to join our growing technology team and help drive this transformation. This is a hands-on technical leadership role, responsible for guiding one of our key product domains - whether that's Funeral Plans, Legal Services, or At-Need Funerals - from strategy through to scalable, secure software delivery. What you'll be doing
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        FEATURED

        PowerBI Developer

        Halian Technology Limited
        W1, Central London
        From £70,000 to £75,000 per annum Plus bonus and benefits
        My client is an award-winning and market-leading insights and solutions provider across pensions and financial services, energy, health, and analytics. The Opportunity We're looking for an experienced and innovativePower Platform Developerto join my clients growing team. Youll play a key role in designing, developing, and supporting scalable, user-friendly business applications, automation workflows, and analytics solutions using Microsoft Power Platform. This is a fantastic opportunity to work across a diverse range of business areas, collaborating closely with stakeholders to drive digital transformation and operational efficiency. Key Responsibilities * Design, build, and maintain custom business applications usingPower Apps * Develop and enhance workflows and automations withPower Automate * Create interactive dashboards and data visualisations usingPower BI
        My client is an award-winning and market-leading insights and solutions provider across pensions and financial services, energy, health, and analytics. The Opportunity We're looking for an experienced and innovativePower Platform Developerto join my clients growing team. Youll play a key role in designing, developing, and supporting scalable, user-friendly business applications, automation workflows, and analytics solutions using Microsoft Power Platform. This is a fantastic opportunity to work across a diverse range of business areas, collaborating closely with stakeholders to drive digital transformation and operational efficiency. Key Responsibilities * Design, build, and maintain custom business applications usingPower Apps * Develop and enhance workflows and automations withPower Automate * Create interactive dashboards and data visualisations usingPower BI
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        NEW
        6-month contract £60,000 City of London - Hybrid working Large and highly esteemed FTSE 250 listed wealth manager based in stunning offices in the heart of the City are looking for an experienced Seismic Presentations Executive to join them on an initial 6-month contact basis. This company provide individual investment and wealth management services for private clients, charities, trustees and professional partners. They have an exceptional reputation in the market and have been trusted for generations to manage and preserve their clients wealth. This new role will be working on a hybrid basis of 3 days from home, and 2 days per week in the London offices, and the annual salary will be £60,000.
        6-month contract £60,000 City of London - Hybrid working Large and highly esteemed FTSE 250 listed wealth manager based in stunning offices in the heart of the City are looking for an experienced Seismic Presentations Executive to join them on an initial 6-month contact basis. This company provide individual investment and wealth management services for private clients, charities, trustees and professional partners. They have an exceptional reputation in the market and have been trusted for generations to manage and preserve their clients wealth. This new role will be working on a hybrid basis of 3 days from home, and 2 days per week in the London offices, and the annual salary will be £60,000.
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        NEW

        SDET

        Sanderson Recruitment
        EC1, City of London
        £400 - £450 per day
        6 Month initial contract £400 - £450 per day outside IR35 London/Hybrid - 2x days a week in London * Design and develop automated testing frameworks and strategies using Playwright/Javascript. * Create and maintain test scripts utilising WebDriver, Selenium, Gherkin, and Cucumber to support behavior-driven development (BDD). * Implement and manage API and UI performance testing using JMeter, ensuring scalability and responsiveness of applications. * Write clear and concise test cases and scenarios using JSON data structures to validate application features. * Conduct thorough testing of user interfaces, ensuring compliance with HTML and CSS standards. * Collaborate with developers and product teams to define testing requirements and assist with continuous integration and delivery (CI/CD) practices.
        6 Month initial contract £400 - £450 per day outside IR35 London/Hybrid - 2x days a week in London * Design and develop automated testing frameworks and strategies using Playwright/Javascript. * Create and maintain test scripts utilising WebDriver, Selenium, Gherkin, and Cucumber to support behavior-driven development (BDD). * Implement and manage API and UI performance testing using JMeter, ensuring scalability and responsiveness of applications. * Write clear and concise test cases and scenarios using JSON data structures to validate application features. * Conduct thorough testing of user interfaces, ensuring compliance with HTML and CSS standards. * Collaborate with developers and product teams to define testing requirements and assist with continuous integration and delivery (CI/CD) practices.
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        FEATURED

        Marketing Manager Technology

        Staffworx Limited
        Chiswick, W4
        market rates, outside IR35, 1-2 days week on site
        MarTech Marketing Technology Consultant - contract, outside IR35 NOTE: This is a mid-level consultant role, looking for someone with 4-5 years relevant experience, this is not a head/lead or programme mgt position, hands on MarTech advisory consultant role. Working for upcoming business technology consulting firm with Enterprise client in the Telco and Digital Commerce sectors. You will work with the client to bridge the gap between marketing and technology, supporting the client in assessing, implementing, and optimizing marketing technology solutions to enhance our clients' marketing strategies and operations. This role requires a deep understanding of marketing technology landscapes, strong analytical skills, and the ability to collaborate with cross-functional teams.
        MarTech Marketing Technology Consultant - contract, outside IR35 NOTE: This is a mid-level consultant role, looking for someone with 4-5 years relevant experience, this is not a head/lead or programme mgt position, hands on MarTech advisory consultant role. Working for upcoming business technology consulting firm with Enterprise client in the Telco and Digital Commerce sectors. You will work with the client to bridge the gap between marketing and technology, supporting the client in assessing, implementing, and optimizing marketing technology solutions to enhance our clients' marketing strategies and operations. This role requires a deep understanding of marketing technology landscapes, strong analytical skills, and the ability to collaborate with cross-functional teams.
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        Your new company A forward-thinking, high-end residential construction firm based in Hertfordshire is embracing digital transformation to stay ahead in a tech-driven industry. With a collaborative and friendly culture, the business is investing in innovation, AI, and the right people to shape the future of construction. Your new role You'll be a tech-savvy, people-smart professional with a passion for innovation and a hands-on approach. * Experience in data analysis, digital innovation, or tech transformation (construction experience is a bonus). * Familiarity with AI tools (e.g. ChatGPT, Copilot, Midjourney) and business platforms (e.g. Power BI, Excel, Google Workspace). * Strong communication skills and the ability to translate technical concepts into plain English. * A proactive mindset, curiosity, and the ability to manage multiple priorities.
        Your new company A forward-thinking, high-end residential construction firm based in Hertfordshire is embracing digital transformation to stay ahead in a tech-driven industry. With a collaborative and friendly culture, the business is investing in innovation, AI, and the right people to shape the future of construction. Your new role You'll be a tech-savvy, people-smart professional with a passion for innovation and a hands-on approach. * Experience in data analysis, digital innovation, or tech transformation (construction experience is a bonus). * Familiarity with AI tools (e.g. ChatGPT, Copilot, Midjourney) and business platforms (e.g. Power BI, Excel, Google Workspace). * Strong communication skills and the ability to translate technical concepts into plain English. * A proactive mindset, curiosity, and the ability to manage multiple priorities.
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        NEW

        Global Claims, IT Solutions Leader

        MARSH CORPORATE SERVICES LIMITED
        The City, EC3R 5BU
        Discretionary Bonus, Pension Scheme & Private Healthcare
        Lead the Future: Global Claims IT Solutions Leader We are looking for a talented professional to join Marsh McLennan as a Claims IT Leader. This hybrid role is based in London and requires a minimum of one day per week in the office. As the lead relationship manager for our strategic partner, youll drive our global claims technology strategy. Youll spearhead the transformation and ongoing improvement of our claims platforms, delivering exceptional value to our business and clients worldwide. This is a unique chance to shape the future of claims tech at a top global professional services firm, collaborating with diverse teams to deliver cutting-edge solutions in a fast-paced, agile environment.
        Lead the Future: Global Claims IT Solutions Leader We are looking for a talented professional to join Marsh McLennan as a Claims IT Leader. This hybrid role is based in London and requires a minimum of one day per week in the office. As the lead relationship manager for our strategic partner, youll drive our global claims technology strategy. Youll spearhead the transformation and ongoing improvement of our claims platforms, delivering exceptional value to our business and clients worldwide. This is a unique chance to shape the future of claims tech at a top global professional services firm, collaborating with diverse teams to deliver cutting-edge solutions in a fast-paced, agile environment.
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        NEWPREMIUM

        Salesforce Revenue Cloud Developer

        167 Solutions Ltd
        NW10, North West London
        From £400 to £600 per day
        Location: Remote (UK Only) Type: Contract Rate: £400 - £600 Visa Sponsorship: Not Available 167 Solutions are partnering with a leading client to hire a Salesforce Revenue Cloud Developer with strong architectural capabilities. This role is ideal for someone who can blend hands-on Revenue Cloud development with solution architecture covering RLM/RCA flows, complex integrations, and advanced Salesforce ecosystem knowledge. Key Responsibilities * Design, develop, and optimise Revenue Cloud (CPQ & Billing) solutions aligned with business needs. * Build and maintain RLM/RCA flows, ensuring automation is scalable and resilient. * Act as a technical architect on projects, advising stakeholders on Salesforce best practice and system design. * Deliver and document end-to-end solution architecture, integration patterns, and technical specifications.
        Location: Remote (UK Only) Type: Contract Rate: £400 - £600 Visa Sponsorship: Not Available 167 Solutions are partnering with a leading client to hire a Salesforce Revenue Cloud Developer with strong architectural capabilities. This role is ideal for someone who can blend hands-on Revenue Cloud development with solution architecture covering RLM/RCA flows, complex integrations, and advanced Salesforce ecosystem knowledge. Key Responsibilities * Design, develop, and optimise Revenue Cloud (CPQ & Billing) solutions aligned with business needs. * Build and maintain RLM/RCA flows, ensuring automation is scalable and resilient. * Act as a technical architect on projects, advising stakeholders on Salesforce best practice and system design. * Deliver and document end-to-end solution architecture, integration patterns, and technical specifications.
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        Forward Deployed Engineer

        McGregor Boyall Associates Limited
        EC1, City of London
        £70000 - £90000 per annum
        * Full Remote * Up to £90,000 p/a for permanent * Contract day rate is negotiable (Outside IR35) We're working with a fully remote, boutique AI consultancy and Palantir services partner. They help organisations in energy, healthcare, financial services, media, and recruitment use modern data and AI platforms to solve complex business challenges. They are building a Palantir Foundry practice led by ex-Palantir leadership. Thanks to these relationships, they're trusted with high-impact, mid-market projects with real business needs and quick delivery cycles. This is a client-facing, hands-on engineering role where you'll design and deliver solutions directly with clients. It's a mix of consulting and coding, ideal for engineers who want to see their work make an immediate impact. What You'll Do
        * Full Remote * Up to £90,000 p/a for permanent * Contract day rate is negotiable (Outside IR35) We're working with a fully remote, boutique AI consultancy and Palantir services partner. They help organisations in energy, healthcare, financial services, media, and recruitment use modern data and AI platforms to solve complex business challenges. They are building a Palantir Foundry practice led by ex-Palantir leadership. Thanks to these relationships, they're trusted with high-impact, mid-market projects with real business needs and quick delivery cycles. This is a client-facing, hands-on engineering role where you'll design and deliver solutions directly with clients. It's a mix of consulting and coding, ideal for engineers who want to see their work make an immediate impact. What You'll Do
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        NEW
        ££85,000 - £110,000 GBP Onsite WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: QA - Lead Automation Architect Work Type & Location: Hybrid - 2 days on-site in London Role Type: Permanent Salary: Up to £110,000 DOE Our client is a global powerhouse in digital transformation, delivering high-impact projects across consulting, cloud, engineering, and infrastructure. They are seeking a QA - Lead Automation Architect to take charge of their automation strategy, leading a team of forward-thinking engineers to deliver world-class solutions for complex enterprise systems. This is more than a hands-on role - you'll be a critical driver of quality engineering culture, pushing innovation, shaping automation frameworks from the ground up, and mentoring others to do the same. * Lead and grow a team of talented QA and automation engineers
        ££85,000 - £110,000 GBP Onsite WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: QA - Lead Automation Architect Work Type & Location: Hybrid - 2 days on-site in London Role Type: Permanent Salary: Up to £110,000 DOE Our client is a global powerhouse in digital transformation, delivering high-impact projects across consulting, cloud, engineering, and infrastructure. They are seeking a QA - Lead Automation Architect to take charge of their automation strategy, leading a team of forward-thinking engineers to deliver world-class solutions for complex enterprise systems. This is more than a hands-on role - you'll be a critical driver of quality engineering culture, pushing innovation, shaping automation frameworks from the ground up, and mentoring others to do the same. * Lead and grow a team of talented QA and automation engineers
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        PREMIUM

        Senior PHP Developer

        Randstad Digital
        EC1, City of London
        £320 - £350 per day
        PHP Architect / Lead Developer Location: 100% Remote Contract: 6-month contract (potential extension) Start Date: ASAP About the Role We're seeking an experienced PHP Architect/Lead Developer to join our agile, forward-thinking technology team. Our in-house platforms power everything from industry-leading e-learning solutions to highly integrated office logistics, all hosted on AWS. In this role, you'll help shape the architecture of new features, enhance existing systems, and mentor a talented team of developers. You'll work with modern PHP frameworks-Symfony, Laravel, and in-house MVC solutions-while leveraging CI/CD practices and cloud-native designs. Key Responsibilities * Design, develop, and maintain enterprise applications, e-learning portals, and web services using PHP. * Apply solid software design patterns and industry best practices.
        PHP Architect / Lead Developer Location: 100% Remote Contract: 6-month contract (potential extension) Start Date: ASAP About the Role We're seeking an experienced PHP Architect/Lead Developer to join our agile, forward-thinking technology team. Our in-house platforms power everything from industry-leading e-learning solutions to highly integrated office logistics, all hosted on AWS. In this role, you'll help shape the architecture of new features, enhance existing systems, and mentor a talented team of developers. You'll work with modern PHP frameworks-Symfony, Laravel, and in-house MVC solutions-while leveraging CI/CD practices and cloud-native designs. Key Responsibilities * Design, develop, and maintain enterprise applications, e-learning portals, and web services using PHP. * Apply solid software design patterns and industry best practices.
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        NEWFEATURED
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies.
        more
        NEW
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies.
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        PREMIUM
        City of London Hybrid (3/2 split) 6-months contract Up to £705 per day (via Umbrella) cer Financial are working alongside an international bank who are based in the City of London. They are seeking a Copilot Engineer/Specialist to work with them on a contract. * Lead the technical implementation of Microsoft Copilot solutions across Microsoft 365 (e.g., Word, Excel, Outlook, Teams, SharePoint) and other platforms. * Design and configure secure, scalable, and compliant Copilot deployments tailored to business needs. * Collaborate with IT, security, and business stakeholders to ensure readiness for production rollout. * Architect and implement integrations between Copilot and enterprise systems to enable contextual, intelligent experiences.
        City of London Hybrid (3/2 split) 6-months contract Up to £705 per day (via Umbrella) cer Financial are working alongside an international bank who are based in the City of London. They are seeking a Copilot Engineer/Specialist to work with them on a contract. * Lead the technical implementation of Microsoft Copilot solutions across Microsoft 365 (e.g., Word, Excel, Outlook, Teams, SharePoint) and other platforms. * Design and configure secure, scalable, and compliant Copilot deployments tailored to business needs. * Collaborate with IT, security, and business stakeholders to ensure readiness for production rollout. * Architect and implement integrations between Copilot and enterprise systems to enable contextual, intelligent experiences.
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        FEATURED

        Senior Penetration Tester

        4SQUARE RECRUITMENT LTD
        Bermondsey, SE1 3RT
        From £50,000 to £75,000 per annum
        Location:Fully Remote (UK-Based) Salary Range:£50,000 - £75,000 (dependent on experience) Position:Permanent, Full-Time My client is a dynamic and growing cybersecurity consultancy dedicated to providing top-tier security services to a diverse range of clients. They believe in empowering the team with the flexibility of remote work while tackling challenging and engaging projects that make a real difference to their clients' security posture. The Role We are seeking a highly skilled and motivated Senior Penetration Tester to join our remote team. You will be responsible for leading and executing complex penetration tests against a variety of systems, networks, and applications. The ideal candidate is not just a proficient tester but a critical thinker who can articulate risks clearly and provide pragmatic remediation advice to clients. Key Responsibilities
        Location:Fully Remote (UK-Based) Salary Range:£50,000 - £75,000 (dependent on experience) Position:Permanent, Full-Time My client is a dynamic and growing cybersecurity consultancy dedicated to providing top-tier security services to a diverse range of clients. They believe in empowering the team with the flexibility of remote work while tackling challenging and engaging projects that make a real difference to their clients' security posture. The Role We are seeking a highly skilled and motivated Senior Penetration Tester to join our remote team. You will be responsible for leading and executing complex penetration tests against a variety of systems, networks, and applications. The ideal candidate is not just a proficient tester but a critical thinker who can articulate risks clearly and provide pragmatic remediation advice to clients. Key Responsibilities
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        Mid-Level C++ Developer (5+ years of experience) Location:Hybrid - 2-3 days onsite in Hounslow Rate:£430 per day (Inside IR35) Duration:12 months (Extension highly likely) Are you an experienced C++ Developer looking for your next long-term contract? We are seeking a technically strong and versatileMid-Level C++ Developerto join our client's high-performing team on a travel technology project. Key Responsibilities * Develop and maintain high-performance Back End components using C++11 or newer. * Design dynamic, responsive Front End interfaces with AngularJS/Angular 2+. * Support and enhance existing systems with a focus on performance, stability, and maintainability. * Collaborate with cross-functional teams (Product Owners, QA, DevOps, etc.) to deliver new features. * Refactor Legacy code and actively contribute to reducing technical debt.
        Mid-Level C++ Developer (5+ years of experience) Location:Hybrid - 2-3 days onsite in Hounslow Rate:£430 per day (Inside IR35) Duration:12 months (Extension highly likely) Are you an experienced C++ Developer looking for your next long-term contract? We are seeking a technically strong and versatileMid-Level C++ Developerto join our client's high-performing team on a travel technology project. Key Responsibilities * Develop and maintain high-performance Back End components using C++11 or newer. * Design dynamic, responsive Front End interfaces with AngularJS/Angular 2+. * Support and enhance existing systems with a focus on performance, stability, and maintainability. * Collaborate with cross-functional teams (Product Owners, QA, DevOps, etc.) to deliver new features. * Refactor Legacy code and actively contribute to reducing technical debt.
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        Data Engineer

        Robert Half
        EC1, City of London
        £60000 - £70000 per annum + Bonus & Benefits
        City of London - Hybrid Working Circa £60k-70k + Bonus & Benefits Our client, a forward-thinking and globally connected staffing & consulting organization is seeking a skilled and driven Data Engineer to join their growing Data & Analytics team. Based in the City of London, this role presents a fantastic opportunity for someone with 2-3 years of data engineering experience who is passionate about building robust data solutions using Microsoft Azure and Microsoft Fabric technologies. This is a hands-on technical role where you'll work closely with the Lead Data Architect and collaborate across the business to design, build, and support scalable data infrastructure that powers business intelligence, reporting, and analytics. The ideal candidate will be eager to grow their skills and take ownership of impactful data projects within a fast-paced, modern tech environment.
        City of London - Hybrid Working Circa £60k-70k + Bonus & Benefits Our client, a forward-thinking and globally connected staffing & consulting organization is seeking a skilled and driven Data Engineer to join their growing Data & Analytics team. Based in the City of London, this role presents a fantastic opportunity for someone with 2-3 years of data engineering experience who is passionate about building robust data solutions using Microsoft Azure and Microsoft Fabric technologies. This is a hands-on technical role where you'll work closely with the Lead Data Architect and collaborate across the business to design, build, and support scalable data infrastructure that powers business intelligence, reporting, and analytics. The ideal candidate will be eager to grow their skills and take ownership of impactful data projects within a fast-paced, modern tech environment.
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        Python Software Engineer

        SF Recruitment (Tech)
        Holloway, N19
        £55k - 65k per year + fully remote
        With recent investment this Python Software Engineer will work closely with the lead Engineer on new platform functionality aimed at creating AI and automation middleware to help drive business efficiencies whilst improving usability for the end user. This role would suit a mid level software engineer with experience working within the financial services space who relishes using the latest technology to build innovative solutions that quickly solve business problems with the ability to understand and translate business requirements into technical solutions. - Strong commercial python development experience# - Framework experience - Flask,Django, FastAPI etc - Solid MySQL skills - Experience working in a fast-paced financial services/ FinTech environment - Azure cloud exposure would be useful - Strong communication and stakeholder engagement skills
        With recent investment this Python Software Engineer will work closely with the lead Engineer on new platform functionality aimed at creating AI and automation middleware to help drive business efficiencies whilst improving usability for the end user. This role would suit a mid level software engineer with experience working within the financial services space who relishes using the latest technology to build innovative solutions that quickly solve business problems with the ability to understand and translate business requirements into technical solutions. - Strong commercial python development experience# - Framework experience - Flask,Django, FastAPI etc - Solid MySQL skills - Experience working in a fast-paced financial services/ FinTech environment - Azure cloud exposure would be useful - Strong communication and stakeholder engagement skills
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        NEWFEATURED
        Senior/Lead Hands on Full Stack Developer - React / Python London | Hybrid (3days in the office and 2 days from home) £110,000+ Equity | Full-Time | Start-up We're a high-growth start-up building a leading healthcare! Looking for a Full Stack developer who loves working across the stack - React on the front end, Python on the back end. * Build responsive UIs in React * Develop APIs & services in Python (either Django/Flask/FastAPI) * Own features end-to-end * Help shape our tech stack * Strong React & Python skills * API & database experience * A proactive, problem-solving mindset * Ideally start-up or scale-up experience Why us? * Big impact from day one * Technical ownership & flexibility * Career growth + equity options Apply with your CV + GitHub
        Senior/Lead Hands on Full Stack Developer - React / Python London | Hybrid (3days in the office and 2 days from home) £110,000+ Equity | Full-Time | Start-up We're a high-growth start-up building a leading healthcare! Looking for a Full Stack developer who loves working across the stack - React on the front end, Python on the back end. * Build responsive UIs in React * Develop APIs & services in Python (either Django/Flask/FastAPI) * Own features end-to-end * Help shape our tech stack * Strong React & Python skills * API & database experience * A proactive, problem-solving mindset * Ideally start-up or scale-up experience Why us? * Big impact from day one * Technical ownership & flexibility * Career growth + equity options Apply with your CV + GitHub
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        Cybersecurity Engineer - Hybrid Remote

        VERTECH GROUP (UK) LTD
        N7, North London
        From £65,000 to £75,000 per annum + Benefits
        Cybersecurity Engineer Location: 3 days per wk from home / 2 days in London Salary: Circa 65K 75K + Benefits Cybersecurity Engineer required by fast-growing, revolutionary tech company! This is a challenging, hands-on role leading the security of their applications, APIs, infrastructure, and data. Youll identify vulnerabilities, define best practices, and implement controls without slowing delivery * At least 3yrs in cybersecurity, application security, or cloud security roles * Strong knowledge of web/mobile security (OWASP Top 10, API security), cloud security (AWS), and CI/CD pipeline hardening * Familiar with SAST/DAST tools, vulnerability scanners, penetration testing frameworks, and monitoring platforms (e.g. Splunk, ELK, Datadog) * Understanding of GDPR and data privacy best practices
        Cybersecurity Engineer Location: 3 days per wk from home / 2 days in London Salary: Circa 65K 75K + Benefits Cybersecurity Engineer required by fast-growing, revolutionary tech company! This is a challenging, hands-on role leading the security of their applications, APIs, infrastructure, and data. Youll identify vulnerabilities, define best practices, and implement controls without slowing delivery * At least 3yrs in cybersecurity, application security, or cloud security roles * Strong knowledge of web/mobile security (OWASP Top 10, API security), cloud security (AWS), and CI/CD pipeline hardening * Familiar with SAST/DAST tools, vulnerability scanners, penetration testing frameworks, and monitoring platforms (e.g. Splunk, ELK, Datadog) * Understanding of GDPR and data privacy best practices
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        FEATURED

        AWS DevOps Engineer, contract, remote (outside IR35)

        Staffworx Limited
        EC1A, City of London
        market rates, outside IR35, initial, likely long term extensions
        AWS DevOps Engineer for remote delivery contract ( 1 day month on site), outside IR35 for digital cloud solution * AWS DevOps specialism (Lambda, API Gateway, Route 53, WAF, Shield, IAM, Cognito) * CI/CD pipelines * AWS API Gateway * NoSQL DB - DynamoDB, MongoDB * CloudFormation, Terraform * CodePipeline * GitHub for CI/CD * JavaScript/TypeScript * continuous integration and source control; Jenkins and GitLab. * Deployment of full stack software engineering technologies, including Typescript, * JavaScript, Node.js, React, kafka, AWS serverless, step functions, Python * Relevant AWS certifications would be highly desirable. #AWS #DEVOPS #DEVOPSJOBS #AWSJOBS #K8S #KUBERNETES #TERRAFORM #STAFFWORX #RECRUITMENTPARTNER #TALENTPARTNER #TOPTALENT #AWSDEVOPS OUTSIDE IR35 - this assignment will fall outside of scope of IR35 legislation
        AWS DevOps Engineer for remote delivery contract ( 1 day month on site), outside IR35 for digital cloud solution * AWS DevOps specialism (Lambda, API Gateway, Route 53, WAF, Shield, IAM, Cognito) * CI/CD pipelines * AWS API Gateway * NoSQL DB - DynamoDB, MongoDB * CloudFormation, Terraform * CodePipeline * GitHub for CI/CD * JavaScript/TypeScript * continuous integration and source control; Jenkins and GitLab. * Deployment of full stack software engineering technologies, including Typescript, * JavaScript, Node.js, React, kafka, AWS serverless, step functions, Python * Relevant AWS certifications would be highly desirable. #AWS #DEVOPS #DEVOPSJOBS #AWSJOBS #K8S #KUBERNETES #TERRAFORM #STAFFWORX #RECRUITMENTPARTNER #TALENTPARTNER #TOPTALENT #AWSDEVOPS OUTSIDE IR35 - this assignment will fall outside of scope of IR35 legislation
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        Were looking for a Senior Security Engineer for our growing, prestigious client in the data sector, based in London, on an initial 6 - 9 monthcontract basis paying market day rates depending on experience Outside IR35. This role offers hybrid working with an expectation to be in the office 3 days per week. Youll be joining a technical team focused on strengthening cloud security and ensuring compliance across Microsoft Azure environments. This role will involve hands-on security engineering, working closely with infrastructure and DevOps teams, and supporting the adoption of Microsofts security toolset across the organisation. * Securing Azure environments in line with best practices - essential * Microsoft Defender (Cloud, Endpoint, 365) - essential * Sentinel - essential * Microsoft Purview, Compliance Manager and related compliance tools
        Were looking for a Senior Security Engineer for our growing, prestigious client in the data sector, based in London, on an initial 6 - 9 monthcontract basis paying market day rates depending on experience Outside IR35. This role offers hybrid working with an expectation to be in the office 3 days per week. Youll be joining a technical team focused on strengthening cloud security and ensuring compliance across Microsoft Azure environments. This role will involve hands-on security engineering, working closely with infrastructure and DevOps teams, and supporting the adoption of Microsofts security toolset across the organisation. * Securing Azure environments in line with best practices - essential * Microsoft Defender (Cloud, Endpoint, 365) - essential * Sentinel - essential * Microsoft Purview, Compliance Manager and related compliance tools
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        Mobile Android & iOS Engineer

        167 Solutions Ltd
        SW1, South West London
        From £300 to £400 per day
        Mobile Developer (iOS / Android) Smart Home / IoT Apps Location: UK/EMEA (Fully Remote) Rate: £300 £400 per day We are seeking a talented and creative Mobile Developer (iOS / Android) to join our clients fast-growing digital and smart home technology team. You will be working on the design, development, and optimisation of innovative mobile applications that power the next generation of home automation and IoT devices, used by thousands of customers daily. This is a fantastic opportunity to make an impact on high-profile projects, working within a collaborative, forward-thinking environment that blends mobile, IoT, cloud, and real-time communication technologies. Key Responsibilities * Develop, test, and deploy high-quality iOS and Android applications (native or cross-platform).
        Mobile Developer (iOS / Android) Smart Home / IoT Apps Location: UK/EMEA (Fully Remote) Rate: £300 £400 per day We are seeking a talented and creative Mobile Developer (iOS / Android) to join our clients fast-growing digital and smart home technology team. You will be working on the design, development, and optimisation of innovative mobile applications that power the next generation of home automation and IoT devices, used by thousands of customers daily. This is a fantastic opportunity to make an impact on high-profile projects, working within a collaborative, forward-thinking environment that blends mobile, IoT, cloud, and real-time communication technologies. Key Responsibilities * Develop, test, and deploy high-quality iOS and Android applications (native or cross-platform).
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        Senior Data Engineer

        I3 Resourcing Limited
        The City, EC3V 3ND
        £70000 - £80000 per annum + + EXCELLENT BONUS + BENEFITS
        Salary - £70-80k with 15% bonus Hybrid working - couple of days in the office City of London * Good understanding of data engineering principles * A good technical grasp of Snowflake and automating it, and transforming complex datasets * AWS Skillset * Delivery experience * Building solutions in snowflake * implementing data warehousing solutions using Snowflake and AWS * Hands-on experience with AWS services such as Glue (Spark), Lambda, Step Functions, ECS, Redshift, and SageMaker. * Enthusiasm for cross-functional work and adaptability beyond traditional data engineering. * Examples like building APIs, integrating with microservices, or contributing to backend systems - not just data pipelines or data modelling. * Mention on tools like GitHub Actions, Jenkins, AWS CDK, CloudFormation, Terraform.
        Salary - £70-80k with 15% bonus Hybrid working - couple of days in the office City of London * Good understanding of data engineering principles * A good technical grasp of Snowflake and automating it, and transforming complex datasets * AWS Skillset * Delivery experience * Building solutions in snowflake * implementing data warehousing solutions using Snowflake and AWS * Hands-on experience with AWS services such as Glue (Spark), Lambda, Step Functions, ECS, Redshift, and SageMaker. * Enthusiasm for cross-functional work and adaptability beyond traditional data engineering. * Examples like building APIs, integrating with microservices, or contributing to backend systems - not just data pipelines or data modelling. * Mention on tools like GitHub Actions, Jenkins, AWS CDK, CloudFormation, Terraform.
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        Technical Project Manager

        Sterling Williams Ltd
        Mayfair, W1
        From £70,000 to £80,000 per annum
        Sterling Williams are working alongside an International Bank looking to hire a hands-on, technical Project Manager on an 18-month FTC basis to support a changing core banking system. You will play a crucial role in overseeing and implementing complex technical integration projects e.g. digital platforms, GL, Payments and other 3rd party systems covering KYC/AML etc. 18 month Fixed Term Contract initially Salary: £80,000 pa plus benefits Full-Time; office based 4 days per week (West End of London) The ideal candidate will have a strong background in software development, system architecture, and project management and will be responsible for leading integration efforts. * Lead the integration stream for the core banking project, focusing on technical aspects. * Assist in the transition to new digital initiatives, ensuring a safe, secure, and risk-managed process.
        Sterling Williams are working alongside an International Bank looking to hire a hands-on, technical Project Manager on an 18-month FTC basis to support a changing core banking system. You will play a crucial role in overseeing and implementing complex technical integration projects e.g. digital platforms, GL, Payments and other 3rd party systems covering KYC/AML etc. 18 month Fixed Term Contract initially Salary: £80,000 pa plus benefits Full-Time; office based 4 days per week (West End of London) The ideal candidate will have a strong background in software development, system architecture, and project management and will be responsible for leading integration efforts. * Lead the integration stream for the core banking project, focusing on technical aspects. * Assist in the transition to new digital initiatives, ensuring a safe, secure, and risk-managed process.
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        What is the average salary for API in Hertfordshire?

        Average salary per year
        £62,499

        The average salary for a API in Hertfordshire is £62,499. API in Hertfordshire salaries range from £47,499 to £67,499.

        Frequently Asked Questions

        How many contract API jobs are there in Hertfordshire?
        There are 106 contract API jobs within 20 miles of Hertfordshire available on Jobsite right now.

        What other similar jobs are there to contract API jobs in Hertfordshire?
        As well as contract API jobs in Hertfordshire, you can find contract .NET Developer, IT, Software Development, amongst many others.