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9 API jobs in Letchworth Garden City + 20 miles
)
Experience with infrastructure-as-code, production-grade Linux environments, and API services (Flask/Gunicorn).
Experience with infrastructure-as-code, production-grade Linux environments, and API services (Flask/Gunicorn).
FEATURED
)
Junior Integration Analyst
Junior Integration Analyst
Altro
Letchworth Garden City (SG6), SG6 1NW
Competitive salary plus additional benefits,
Are you curious about how systems talk to each other? Do you enjoy solving problems, working with data, and learning new technical skills? If so, this could be the perfect next step in your IT career. We’re looking for a Junior Integration Specialist to join our IT Department and support the delivery of our Global Integration Roadmap. You’ll work alongside experienced Integration Specialists and Analysts, helping to build, test, and maintain the connections that keep our systems running smoothly, both internally and with our external partners. This is a fantastic opportunity to develop hands-on experience in integrations, data flows, APIs, and EDI, while working with tools such as SSIS, SQL, and ZappySys. This permanent, full time, hybrid working ( 3 days a week in the office) is based at our Letchworth Garden City Head office.
Are you curious about how systems talk to each other? Do you enjoy solving problems, working with data, and learning new technical skills? If so, this could be the perfect next step in your IT career. We’re looking for a Junior Integration Specialist to join our IT Department and support the delivery of our Global Integration Roadmap. You’ll work alongside experienced Integration Specialists and Analysts, helping to build, test, and maintain the connections that keep our systems running smoothly, both internally and with our external partners. This is a fantastic opportunity to develop hands-on experience in integrations, data flows, APIs, and EDI, while working with tools such as SSIS, SQL, and ZappySys. This permanent, full time, hybrid working ( 3 days a week in the office) is based at our Letchworth Garden City Head office.
PREMIUM
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Infrastructure Project Manager
Infrastructure Project Manager
EMBL-EBI
Hinxton, Saffron Walden (CB10), CB10 1SD
From £57,520 to £88,993 per annum based on experience and family
About the Team - The Protein Data Bank in Europe (PDBe) is a founding member of the Worldwide Protein Data Bank, the international consortium responsible for maintaining the global archive of experimentally determined macromolecular structures, the Protein Data Bank (PDB). PDBe also maintains the PDBe Knowledge Base (PDBe-KB), a community-driven resource launched in 2018 to integrate functional and biophysical annotations for macromolecular structures. Furthermore, the team co-develops and operates the AlphaFold Protein Structure Database (AFDB), launched in collaboration with Google DeepMind in July 2021, which provides large-scale access to AI-predicted protein structures. The PDBe team consists of an international and interdisciplinary group of scientists, software engineers, and data engineers.
About the Team - The Protein Data Bank in Europe (PDBe) is a founding member of the Worldwide Protein Data Bank, the international consortium responsible for maintaining the global archive of experimentally determined macromolecular structures, the Protein Data Bank (PDB). PDBe also maintains the PDBe Knowledge Base (PDBe-KB), a community-driven resource launched in 2018 to integrate functional and biophysical annotations for macromolecular structures. Furthermore, the team co-develops and operates the AlphaFold Protein Structure Database (AFDB), launched in collaboration with Google DeepMind in July 2021, which provides large-scale access to AI-predicted protein structures. The PDBe team consists of an international and interdisciplinary group of scientists, software engineers, and data engineers.
PREMIUM
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Were looking for a hands-on Python Developer to join a high-performing team delivering modern applications and migrating legacy systems into scalable, web-based solutions. This is a fast-paced, delivery-focused role where youll work alongside experienced engineers on real-world, high-impact projects across multiple customer environments. * Building and maintaining Python-based back-end services (APIs, background tasks) * Developing web applications (Flask, FastAPI, or Django) * Supporting legacy system modernisation & data migrations * Working with SQL databases (PostgreSQL/MySQL) * Writing clean, testable code and contributing to CI/CD pipelines * Collaborating in a DevOps-driven, containerised (Docker) environment * Strong Python development experience * Experience with REST APIs & web frameworks (FastAPI, Flask or Django) * Solid understanding of SQL & data handling
Were looking for a hands-on Python Developer to join a high-performing team delivering modern applications and migrating legacy systems into scalable, web-based solutions. This is a fast-paced, delivery-focused role where youll work alongside experienced engineers on real-world, high-impact projects across multiple customer environments. * Building and maintaining Python-based back-end services (APIs, background tasks) * Developing web applications (Flask, FastAPI, or Django) * Supporting legacy system modernisation & data migrations * Working with SQL databases (PostgreSQL/MySQL) * Writing clean, testable code and contributing to CI/CD pipelines * Collaborating in a DevOps-driven, containerised (Docker) environment * Strong Python development experience * Experience with REST APIs & web frameworks (FastAPI, Flask or Django) * Solid understanding of SQL & data handling
You will support their ticket handling and ongoing development work following their recent go-live. This engagement will initially run for 1 month and will involve close collaboration with their in-house NAV/BC developer. * Providing support for our Business Central helpdesk tickets * Delivering work on newfeature requests * Strong reporting expertise, including Business CentraltoBI and Excel integrations via APIs * Ability to advise on the migration path from on-premise to SaaS * Comprehensive understanding of the Business Centralon-premise infrastructure (e.g., HTTPS printing, email configurations, and related scenarios) * Knowledge of CRM platforms with the ability to guide them on the recommended approach and considerations Potential for further project work. £450-500 per day. Based Hertfordshire / Remote
You will support their ticket handling and ongoing development work following their recent go-live. This engagement will initially run for 1 month and will involve close collaboration with their in-house NAV/BC developer. * Providing support for our Business Central helpdesk tickets * Delivering work on newfeature requests * Strong reporting expertise, including Business CentraltoBI and Excel integrations via APIs * Ability to advise on the migration path from on-premise to SaaS * Comprehensive understanding of the Business Centralon-premise infrastructure (e.g., HTTPS printing, email configurations, and related scenarios) * Knowledge of CRM platforms with the ability to guide them on the recommended approach and considerations Potential for further project work. £450-500 per day. Based Hertfordshire / Remote
Security architecture fundamentals * API, integration, and middleware technologies
Security architecture fundamentals * API, integration, and middleware technologies
Integration technologies (API, message-based, OT interfaces, middleware)
Integration technologies (API, message-based, OT interfaces, middleware)
Software Development Engineer I (Analytics Implementation)
Software Development Engineer I (Analytics Implementation)
TESCO Plc*
Welwyn Garden City, Hertfordshire
Competitive
Exposure or working knowledge of tracking implementations for Adobe and Google Analytics 4 technical API methods
Exposure or working knowledge of tracking implementations for Adobe and Google Analytics 4 technical API methods
Application Support Engineer - 12 months' Fixed Term Contract
Application Support Engineer - 12 months' Fixed Term Contract
RTX Technologies
Harlow, London
Competitive
2026-03-10 - United Kingdom - Harlow, Essex - Hybrid - Job Title: Application Support Engineer - Grade: P3 - Function: DT - Location: Harlow (Hybrid) Clearance: SC Eligible - Duration: Fixed Term Contract 12 months - Hours: Full Time 37 hours per week - Raytheon UK - At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. We provide a collaborative environment, abundant opportunities for professional development, and a profound sense of purpose in what we do. Together, we are not just advancing technology; we're building a community committed to safeguarding a safer and more connected world.
2026-03-10 - United Kingdom - Harlow, Essex - Hybrid - Job Title: Application Support Engineer - Grade: P3 - Function: DT - Location: Harlow (Hybrid) Clearance: SC Eligible - Duration: Fixed Term Contract 12 months - Hours: Full Time 37 hours per week - Raytheon UK - At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. We provide a collaborative environment, abundant opportunities for professional development, and a profound sense of purpose in what we do. Together, we are not just advancing technology; we're building a community committed to safeguarding a safer and more connected world.
689 exact matches jobs are outside your preferred location
)
We are seeking a Java API Developer to join our Digital Asset development team. * Implement APIs in line with internal requirements for API design, security, versioning, and documentation, ensuring solutions are consistent and reusable. * Collaborate with business and technology stakeholders to understand requirements, clarify edge cases, and deliver well-scoped API changes in an Agile sprint model. * Hands-on experience developing Java backend applications, including REST API development in production or near-production environments. * Familiarity with common Java API frameworks and patterns (e.g., Spring Boot / Spring MVC-style services) and building maintainable service layers. * Understanding of secure API fundamentals (authentication/authorization concepts, safe handling of sensitive data) and willingness to follow enterprise standards.
We are seeking a Java API Developer to join our Digital Asset development team. * Implement APIs in line with internal requirements for API design, security, versioning, and documentation, ensuring solutions are consistent and reusable. * Collaborate with business and technology stakeholders to understand requirements, clarify edge cases, and deliver well-scoped API changes in an Agile sprint model. * Hands-on experience developing Java backend applications, including REST API development in production or near-production environments. * Familiarity with common Java API frameworks and patterns (e.g., Spring Boot / Spring MVC-style services) and building maintainable service layers. * Understanding of secure API fundamentals (authentication/authorization concepts, safe handling of sensitive data) and willingness to follow enterprise standards.
We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands-on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilitiesspanning digital custody, tokenization enablement, digital transfer agency, and digital cash/settlement workflows. * Build API services that participate in the platforms centralized integration approachsupporting client/app onboarding and app-to-service integrations via an Integration Hub and secure gateways. * Implement APIs that align to enterprise API design/security/publishing requirements, ensuring designs are review-ready and compliant with internal standards (security, documentation, and platform requirements). * Collaborate across teams to drive clear API contracts and dependencies for integrations to traditional ...
We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands-on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilitiesspanning digital custody, tokenization enablement, digital transfer agency, and digital cash/settlement workflows. * Build API services that participate in the platforms centralized integration approachsupporting client/app onboarding and app-to-service integrations via an Integration Hub and secure gateways. * Implement APIs that align to enterprise API design/security/publishing requirements, ensuring designs are review-ready and compliant with internal standards (security, documentation, and platform requirements). * Collaborate across teams to drive clear API contracts and dependencies for integrations to traditional ...
We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands-on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilitiesspanning digital custody, tokenization enablement, digital transfer agency, and digital cash/settlement workflows. * Build API services that participate in the platforms centralized integration approachsupporting client/app onboarding and app-to-service integrations via an Integration Hub and secure gateways. * Implement APIs that align to enterprise API design/security/publishing requirements, ensuring designs are review-ready and compliant with internal standards (security, documentation, and platform requirements). * Collaborate across teams to drive clear API contracts and dependencies for integrations to traditional ...
We are seeking an experienced Java API Developer to join our Digital Asset development team. This is a hands-on engineering role responsible for building and operating secure, resilient API services that power institutional digital asset capabilitiesspanning digital custody, tokenization enablement, digital transfer agency, and digital cash/settlement workflows. * Build API services that participate in the platforms centralized integration approachsupporting client/app onboarding and app-to-service integrations via an Integration Hub and secure gateways. * Implement APIs that align to enterprise API design/security/publishing requirements, ensuring designs are review-ready and compliant with internal standards (security, documentation, and platform requirements). * Collaborate across teams to drive clear API contracts and dependencies for integrations to traditional ...
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Full Stack Developer (FinTech/ Insurance)
Full Stack Developer (FinTech/ Insurance)
Ernest Gordon Recruitment
Basildon (SS13)
£45000 - £55000 per annum + Training, Progression, Company Benefit,
Basildon - Hybrid £45,000 - £55,000 + Training + Progression + Healthcare Coverage + Benefits - Are you a Full Stack Developer with a strong front-end focus, looking to join a talented team building cutting-edge websites for global FinTech clients, using modern technologies and receiving great training to support your progression into a senior role? Are you looking to join a company that genuinely invests in your future, with unlimited training opportunities and a best-in-class e-learning platform designed to keep you ahead of the curve in a fast-evolving tech landscape? This company have become a true disruptor in the insurance industry, seamlessly blending cutting-edge technology with every aspect of the sector. Their intelligent automation solutions are helping insurance firms stay agile, competitive, and efficient by streamlining traditionally time-consuming processes.
Basildon - Hybrid £45,000 - £55,000 + Training + Progression + Healthcare Coverage + Benefits - Are you a Full Stack Developer with a strong front-end focus, looking to join a talented team building cutting-edge websites for global FinTech clients, using modern technologies and receiving great training to support your progression into a senior role? Are you looking to join a company that genuinely invests in your future, with unlimited training opportunities and a best-in-class e-learning platform designed to keep you ahead of the curve in a fast-evolving tech landscape? This company have become a true disruptor in the insurance industry, seamlessly blending cutting-edge technology with every aspect of the sector. Their intelligent automation solutions are helping insurance firms stay agile, competitive, and efficient by streamlining traditionally time-consuming processes.
FEATURED
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Manage and optimize Akamai security suites including: WAF, L7 Anti DDoS, Bot Manager Premier, API Security, Site Shield, API Acceleration. Akamai certifications (WAF, DDoS, Bot Manager, API Protector, Site Shield) are a strong plus.
Manage and optimize Akamai security suites including: WAF, L7 Anti DDoS, Bot Manager Premier, API Security, Site Shield, API Acceleration. Akamai certifications (WAF, DDoS, Bot Manager, API Protector, Site Shield) are a strong plus.
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Senior Data Scientist - 12 Month FTC
Senior Data Scientist - 12 Month FTC
Vitality Corporate Services Limited
Charing Cross, Central London (WC2), WC2R
£Competitive + Bonus + Benefits
Strong understanding of API development, microservices, and containerization (Docker, Kubernetes)
Strong understanding of API development, microservices, and containerization (Docker, Kubernetes)
PREMIUM
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API integration's
API integration's
FEATURED
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Lead .Net Developer
Lead .Net Developer
Halian Technology Limited
Central London (W1)
From £75,000 to £85,000 per annum Plus bonus and benfits
Architect secure, high-performance API solutions using C#, .NET, and Azure. Ensure best practices in API design, security, and performance optimisation. Strong experience with RESTful API development and microservices architecture. Strong understanding of API security, authentication, and performance optimisation.
Architect secure, high-performance API solutions using C#, .NET, and Azure. Ensure best practices in API design, security, and performance optimisation. Strong experience with RESTful API development and microservices architecture. Strong understanding of API security, authentication, and performance optimisation.
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Integrations Solution Architect
Integrations Solution Architect
Alexander Edward James Consulting Limited
City of London (EC1)
£100,000 per annum
Design and lead the delivery of enterprise integration solutions using MuleSoft and API-led architecture.
Design and lead the delivery of enterprise integration solutions using MuleSoft and API-led architecture.
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AI Architect – Generative AI / LLM / Cloud (Enterprise Scale)
AI Architect – Generative AI / LLM / Cloud (Enterprise Scale)
DCV Technologies Limited
London
From £125,000 to £166,000 per annum
Experience with Kubernetes, Docker, microservices architectures, and API integrations
Experience with Kubernetes, Docker, microservices architectures, and API integrations
FEATURED
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Define API strategies including RESTful and event-driven architectures * Experience designing microservices and API-led architectures
Define API strategies including RESTful and event-driven architectures * Experience designing microservices and API-led architectures
FEATURED
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Experience working with software systems including querying, SQL scripting, and working with API development * Technical understanding of Meta advertising products (including Ads and Pages API, Identity Platform) * Experience working with API documents, calling APIs using scripts, and testing APIs
Experience working with software systems including querying, SQL scripting, and working with API development * Technical understanding of Meta advertising products (including Ads and Pages API, Identity Platform) * Experience working with API documents, calling APIs using scripts, and testing APIs
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Lead Solution Architect – Endur (ETRM Gas & Power Trading)
Lead Solution Architect – Endur (ETRM Gas & Power Trading)
BP Energy
St James, South West London (SW1), WC2N 5DU
Competitive
Experience with modern architecture patterns: microservices, messaging/event-driven design, caching, and API strategy.
Experience with modern architecture patterns: microservices, messaging/event-driven design, caching, and API strategy.
Collections API
Collections API
FEATURED
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FryerMiles are delighted to be working with a leading UK Consultancy to assist with their recruitment of a Full Stack Engineer to work on a large financial project within the UK public sector. The successful candidate will be a mid level Full Stack Engineer with hands on experience building robust applications using C#, Python, and JavaScript, supporting the delivery of secure, scalable, automated cloud platforms across the Public Sector. * Design, develop and maintain full-stack web applications using C#, Python and JavaScript * Build and enhance backend services using frameworks including .NET, Flask, and Django * Develop user friendly front end interfaces with React, Angular or similar * Create and maintain RESTful API’s, microservices, and integrations with third party systems * Troubleshoot and debug issues across the stack * Participate in code reviews
FryerMiles are delighted to be working with a leading UK Consultancy to assist with their recruitment of a Full Stack Engineer to work on a large financial project within the UK public sector. The successful candidate will be a mid level Full Stack Engineer with hands on experience building robust applications using C#, Python, and JavaScript, supporting the delivery of secure, scalable, automated cloud platforms across the Public Sector. * Design, develop and maintain full-stack web applications using C#, Python and JavaScript * Build and enhance backend services using frameworks including .NET, Flask, and Django * Develop user friendly front end interfaces with React, Angular or similar * Create and maintain RESTful API’s, microservices, and integrations with third party systems * Troubleshoot and debug issues across the stack * Participate in code reviews
Solid understanding of cloud-based architectures, especially Azure or AWS, including API
Solid understanding of cloud-based architectures, especially Azure or AWS, including API
Related Jobs
Locations
- Moorgate
- Southwark
- St James
- The City, City (EC2)
- The City, City (EC3)
- Canary Wharf
- Charing Cross
- Chilton
- Datchet Common
- Euston
- City of London
- Cambridge
- Central London
- West End
- South East London
- Reading
- Loughton
- Bracknell
- Milton Keynes
- Oxford
- London
- Cambridgeshire
- Berkshire
- Oxfordshire
- Essex
- Buckinghamshire
- Hertfordshire
- Leicestershire
- Surrey
- Northamptonshire
- South East
- East Anglia
- East Midlands
- Midlands