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39 Permanent API jobs in Hertfordshire + 20 miles
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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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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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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.
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Implement robust state management and API integration * Collaborate with backend teams on API contracts and integration
Implement robust state management and API integration * Collaborate with backend teams on API contracts and integration
FEATURED
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T24 Developer - Transact
T24 Developer - Transact
Hireful
Central London, London
66K Basic + 12.5% Pension + Bonus (typical 25%, performance based) + 2
Experience participating in T24 upgrade and integration projects (including API integrations).
Experience participating in T24 upgrade and integration projects (including API integrations).
FEATURED
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API integration
API integration
PREMIUM
API and cloud platform exposure
API and cloud platform exposure
FEATURED
Support customers with issue resolution across API and manual dispatch services
Support customers with issue resolution across API and manual dispatch services
FEATURED
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Manage API integrations and automate data ingestion, transformation, and enrichment processes.
Manage API integrations and automate data ingestion, transformation, and enrichment processes.
Experience with Python/Fast API for backend development.
Experience with Python/Fast API for backend development.
Are you a technical visionary ready to shape the future of global commerce? We are partnering with a world-leading family of iconic activewear and footwear brands to find a Digital Commerce Architect. This is a pivotal role owning the architectural evolution of a Shopify-led ecosystem across B2B and D2C. You will act as the technical authority, managing a diverse digital backlog and governing a multi-vendor environment to deliver scalable, secure, and future-ready solutions. The Requirements * Proven experience as a Digital or Commerce Architect in B2B/D2C. * Deep expertise in Shopify architecture and the supporting app estate. * Strong understanding of MACH, headless, and composable commerce. * Expertise in managing third-party integrators and APIs (SAP, PIM, CRM). * Leadership skills to mentor engineers and influence senior stakeholders. The Benefits
Are you a technical visionary ready to shape the future of global commerce? We are partnering with a world-leading family of iconic activewear and footwear brands to find a Digital Commerce Architect. This is a pivotal role owning the architectural evolution of a Shopify-led ecosystem across B2B and D2C. You will act as the technical authority, managing a diverse digital backlog and governing a multi-vendor environment to deliver scalable, secure, and future-ready solutions. The Requirements * Proven experience as a Digital or Commerce Architect in B2B/D2C. * Deep expertise in Shopify architecture and the supporting app estate. * Strong understanding of MACH, headless, and composable commerce. * Expertise in managing third-party integrators and APIs (SAP, PIM, CRM). * Leadership skills to mentor engineers and influence senior stakeholders. The Benefits
Agility core practices, Agility core practices, API and platform design, Cloud Platforms, Collaboration, Communication, Configuration management and release, Continuous deployment and release, Creating a high performing team, Database Design, Digital Project Management, Documentation and knowledge sharing, Emerging technology monitoring, Facilitation, Information Security, Mentoring, Metrics definition and instrumentation, NoSql data modelling, Problem Solving, Relational Data Modelling, Risk Management, Scripting, Secure development, Service operations and resiliency, Software Design and Development {+ 7 more}
Agility core practices, Agility core practices, API and platform design, Cloud Platforms, Collaboration, Communication, Configuration management and release, Continuous deployment and release, Creating a high performing team, Database Design, Digital Project Management, Documentation and knowledge sharing, Emerging technology monitoring, Facilitation, Information Security, Mentoring, Metrics definition and instrumentation, NoSql data modelling, Problem Solving, Relational Data Modelling, Risk Management, Scripting, Secure development, Service operations and resiliency, Software Design and Development {+ 7 more}
)
Build FE views against back end endpoints - API like
Build FE views against back end endpoints - API like
)
Senior Enterprise Architect - ServiceNow - Remote US available
Senior Enterprise Architect - ServiceNow - Remote US available
TJX UK
Watford (WD17), WD17 1TX
Competitive + Benefits
TJX Companies - At TJX Companies, every day brings new opportunities for growth, exploration, and achievement. You'll be part of our vibrant team that embraces diversity, fosters collaboration, and prioritizes your development. Whether you're working in our four global Home Offices, Distribution Centers or Retail Stores-TJ Maxx, Marshalls, Homegoods, Homesense, Sierra, Winners, and TK Maxx, you'll find abundant opportunities to learn, thrive, and make an impact. Come join our TJX family-a Fortune 100 company and the world's leading off-price retailer. Wh o we are - The Enterprise Architecture team at TJX drives technology strategy , innovation, and governance across multiple technical domains to ensure all technology decisions align with business goals and enterprise standards. We are seeking a Senior Enterprise Architect with d eep ServiceNow experience to lead the design, ...
TJX Companies - At TJX Companies, every day brings new opportunities for growth, exploration, and achievement. You'll be part of our vibrant team that embraces diversity, fosters collaboration, and prioritizes your development. Whether you're working in our four global Home Offices, Distribution Centers or Retail Stores-TJ Maxx, Marshalls, Homegoods, Homesense, Sierra, Winners, and TK Maxx, you'll find abundant opportunities to learn, thrive, and make an impact. Come join our TJX family-a Fortune 100 company and the world's leading off-price retailer. Wh o we are - The Enterprise Architecture team at TJX drives technology strategy , innovation, and governance across multiple technical domains to ensure all technology decisions align with business goals and enterprise standards. We are seeking a Senior Enterprise Architect with d eep ServiceNow experience to lead the design, ...
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Location - Erskine, Newcastle, Farnborough or London - Candidates are required to be eligible for clearance - The AI Enterprise Architect defines the target-state AI architecture and multi-year roadmap to enable scalable, secure, and governed AI adoption across the enterprise. This senior role provides strategic leadership, vendor and platform guidance, and architectural governance across AI initiatives, ensuring alignment with business strategy, enterprise standards, and regulatory requirements. * Governance & Standards: Establish AI governance frameworks, policies, and playbooks for model development, data usage, security, ethical AI, and compliance. * Strategic Leadership: Provide architectural leadership and direction across delivery teams, ensuring consistent adoption of AI standards and patterns.
Location - Erskine, Newcastle, Farnborough or London - Candidates are required to be eligible for clearance - The AI Enterprise Architect defines the target-state AI architecture and multi-year roadmap to enable scalable, secure, and governed AI adoption across the enterprise. This senior role provides strategic leadership, vendor and platform guidance, and architectural governance across AI initiatives, ensuring alignment with business strategy, enterprise standards, and regulatory requirements. * Governance & Standards: Establish AI governance frameworks, policies, and playbooks for model development, data usage, security, ethical AI, and compliance. * Strategic Leadership: Provide architectural leadership and direction across delivery teams, ensuring consistent adoption of AI standards and patterns.
PREMIUM
Senior .Net Developer
Senior .Net Developer
Halian Technology Limited
Central London (W1)
From £85,000 to £95,000 per annum Plus bonus and benefits
Senior Backend Engineer (.NET Core) Fintech / Payments - We are looking for an experienced Senior Backend Engineer to join an engineering team building secure, scalable systems within the fintech space. This role is suited to a backend specialist with strong .NET Core experience who enjoys working on complex, high-throughput platforms where performance, reliability, and security are essential. You will contribute to the design and evolution of backend services, work on distributed systems, and help maintain high engineering standards across the team. Key Responsibilities * Design, develop, and maintain secure, high-performance backend services using.NET Core * Build, evolve, and maintain RESTful APIs * Contribute to microservices-based and distributed system architectures * Work across both greenfield and existing systems with a focus on scalability and maintainability
Senior Backend Engineer (.NET Core) Fintech / Payments - We are looking for an experienced Senior Backend Engineer to join an engineering team building secure, scalable systems within the fintech space. This role is suited to a backend specialist with strong .NET Core experience who enjoys working on complex, high-throughput platforms where performance, reliability, and security are essential. You will contribute to the design and evolution of backend services, work on distributed systems, and help maintain high engineering standards across the team. Key Responsibilities * Design, develop, and maintain secure, high-performance backend services using.NET Core * Build, evolve, and maintain RESTful APIs * Contribute to microservices-based and distributed system architectures * Work across both greenfield and existing systems with a focus on scalability and maintainability
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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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Senior Integration Engineer
Senior Integration Engineer
DGH Recruitment
The City, City of London (EC2), EC2M 7PP
£80000 - £90000 per annum
DGH Recruitment are currently recruiting on behalf of a leading client in the professional services industry who require a Senior Integration Engineer to join the firm in London. You will be responsible for designing, building, and supporting scalable integrations using Workato. Please note: This role will be largely remote with occasional ad-hoc visits to the London office when required. The hours for this role are 11am-7pm to align with the US team. * Design, build, test, and maintain integrations using Workato. * Leverage advanced Workato capabilities, including Recipe design and optimization, Custom connectors and SDKs, On-premise agents, Error handling, retries, and monitoring best practices. * Ensure integrations are secure, scalable, resilient, and aligned with architectural standards. * Perform regular code and recipe reviews, providing constructive feedback to ...
DGH Recruitment are currently recruiting on behalf of a leading client in the professional services industry who require a Senior Integration Engineer to join the firm in London. You will be responsible for designing, building, and supporting scalable integrations using Workato. Please note: This role will be largely remote with occasional ad-hoc visits to the London office when required. The hours for this role are 11am-7pm to align with the US team. * Design, build, test, and maintain integrations using Workato. * Leverage advanced Workato capabilities, including Recipe design and optimization, Custom connectors and SDKs, On-premise agents, Error handling, retries, and monitoring best practices. * Ensure integrations are secure, scalable, resilient, and aligned with architectural standards. * Perform regular code and recipe reviews, providing constructive feedback to ...
Sharepoint Developer & Administrator
Sharepoint Developer & Administrator
DGH Recruitment
City of London (EC1)
£85000 - £93000 per annum + Benefits
Hybrid working: 3 days per week required in the office. DGH Recruitment are currently recruiting on behalf of a global law firm who are looking for a Sharepoint Developer & Administrator to join the team on a permanent basis in their London office as they look to grow their IT function within the EMEA region. They are seeking a highly skilled Senior SharePoint Developer & Administrator to design, develop, administer, and modernize their SharePoint environments across SharePoint Subscription Edition (SE) and SharePoint Online. This role will combine hands-on custom development with enterprise platform administration, including system maintenance, updates, patching, governance, and intranet design. Responsibilities; - Sharepoint development and modernisation - Sharepoint administration and operations - Sharepoint on prem integration - Technical documentation
Hybrid working: 3 days per week required in the office. DGH Recruitment are currently recruiting on behalf of a global law firm who are looking for a Sharepoint Developer & Administrator to join the team on a permanent basis in their London office as they look to grow their IT function within the EMEA region. They are seeking a highly skilled Senior SharePoint Developer & Administrator to design, develop, administer, and modernize their SharePoint environments across SharePoint Subscription Edition (SE) and SharePoint Online. This role will combine hands-on custom development with enterprise platform administration, including system maintenance, updates, patching, governance, and intranet design. Responsibilities; - Sharepoint development and modernisation - Sharepoint administration and operations - Sharepoint on prem integration - Technical documentation
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React Frontend Developer
React Frontend Developer
EXL Service
City of London (EC3N)
A competitive salary with a generous bonus and additional benefits
EXL (NASDAQ: EXLS)is a global data and artificial intelligence ("AI") company that offers services and solutions to reinvent client business models, drive better outcomes and unlock growth with speed. EXL harnesses the power of data, AI, and deep industry knowledge to transform businesses, including the worlds leading corporations in industries including insurance, healthcare, banking and financial services, media and retail, among others. EXL was founded in 1999 with the core values of innovation, collaboration, excellence, integrity and respect. We are headquartered in New York and have more than 60,000 employees spanning six continents. Role Title:Front-End Developer - BU/Segment:Analytics /Insurance - Location: London, United Kingdom (Flexible hybrid working) Employment Type:Permanent - EXL is seeking a skilledFront-End Developerto join our Analytics team in London.
EXL (NASDAQ: EXLS)is a global data and artificial intelligence ("AI") company that offers services and solutions to reinvent client business models, drive better outcomes and unlock growth with speed. EXL harnesses the power of data, AI, and deep industry knowledge to transform businesses, including the worlds leading corporations in industries including insurance, healthcare, banking and financial services, media and retail, among others. EXL was founded in 1999 with the core values of innovation, collaboration, excellence, integrity and respect. We are headquartered in New York and have more than 60,000 employees spanning six continents. Role Title:Front-End Developer - BU/Segment:Analytics /Insurance - Location: London, United Kingdom (Flexible hybrid working) Employment Type:Permanent - EXL is seeking a skilledFront-End Developerto join our Analytics team in London.
.NET Core Backend Developer
.NET Core Backend Developer
EXL Service
The City, City of London (EC3), EC3N 1DD
A competitive salary with a generous bonus and additional benefits
EXL (NASDAQ: EXLS)is a global data and artificial intelligence ("AI") company that offers services and solutions to reinvent client business models, drive better outcomes and unlock growth with speed. EXL harnesses the power of data, AI, and deep industry knowledge to transform businesses, including the worlds leading corporations in industries including insurance, healthcare, banking and financial services, media and retail, among others. EXL was founded in 1999 with the core values of innovation, collaboration, excellence, integrity and respect. We are headquartered in New York and have more than 60,000 employees spanning six continents. Role Title:.NET Core Backend Developer - BU/Segment:Analytics /Insurance - Location: London, United Kingdom (Flexible hybrid working) Employment Type:Permanent - EXL is seeking an experienced.NET Core Backend Developerto join our Analytics team ...
EXL (NASDAQ: EXLS)is a global data and artificial intelligence ("AI") company that offers services and solutions to reinvent client business models, drive better outcomes and unlock growth with speed. EXL harnesses the power of data, AI, and deep industry knowledge to transform businesses, including the worlds leading corporations in industries including insurance, healthcare, banking and financial services, media and retail, among others. EXL was founded in 1999 with the core values of innovation, collaboration, excellence, integrity and respect. We are headquartered in New York and have more than 60,000 employees spanning six continents. Role Title:.NET Core Backend Developer - BU/Segment:Analytics /Insurance - Location: London, United Kingdom (Flexible hybrid working) Employment Type:Permanent - EXL is seeking an experienced.NET Core Backend Developerto join our Analytics team ...
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Senior Developer - Java/ Angular
Senior Developer - Java/ Angular
Hays
Canary Wharf, East London (E14), E14 5EY
£80000.0 - £83000.0 per annum + 80000-83000
Your new company - A leading consultancy sitting within their market-leading tax practice is renowned for delivering sustainable growth and empowering people to shape their careers. They are responsible for the innovation and development of human-centric products within the organisation. Their mission is to transform the working lives of finance and tax professionals. Your new role - A Senior Developer is urgently required to join the team, to work as part of the Tax technology team to develop and implement technical solutions that are resilient and scalable. The Senior Developer will work closely with other members of the team (designers, product owners, business analysts and developers) to deliver excellent experiences for their key clients. The Senior Developer will be required to develop ideas to find a pragmatic approach to the rapid delivery of prototypes, enabling a ...
Your new company - A leading consultancy sitting within their market-leading tax practice is renowned for delivering sustainable growth and empowering people to shape their careers. They are responsible for the innovation and development of human-centric products within the organisation. Their mission is to transform the working lives of finance and tax professionals. Your new role - A Senior Developer is urgently required to join the team, to work as part of the Tax technology team to develop and implement technical solutions that are resilient and scalable. The Senior Developer will work closely with other members of the team (designers, product owners, business analysts and developers) to deliver excellent experiences for their key clients. The Senior Developer will be required to develop ideas to find a pragmatic approach to the rapid delivery of prototypes, enabling a ...
Senior Full-Stack Developer
Senior Full-Stack Developer
Hireful
Milton Keynes, Buckinghamshire, MK9
up to £60k base + Bonus and great benefits
Are you a Senior Full Stack Developer who fancies redefining operational excellence across higher education, conference and events applications? You’ll be joining a company trusted by more than 350 institutions worldwide and backed by 25 years of experience. You’ll be joining a people-first, purpose-driven business where ideas are valued, growth is supported and impact is truly visible. We’re looking for a Senior Full Stack Developer with outstanding front-end expertise and at least some back end .Net capabilities to help shape the next chapter of our platform. You’ll design and deliver accessible, secure and high-quality web solutions, working closely with clients, project managers and fellow developers. Role: Senior Full Stack Web Developer, Senior Web Developer, Senior Developer, Senior Full-Stack Developer, Senior Front End Developer, Full Stack Developer, Senior ...
Are you a Senior Full Stack Developer who fancies redefining operational excellence across higher education, conference and events applications? You’ll be joining a company trusted by more than 350 institutions worldwide and backed by 25 years of experience. You’ll be joining a people-first, purpose-driven business where ideas are valued, growth is supported and impact is truly visible. We’re looking for a Senior Full Stack Developer with outstanding front-end expertise and at least some back end .Net capabilities to help shape the next chapter of our platform. You’ll design and deliver accessible, secure and high-quality web solutions, working closely with clients, project managers and fellow developers. Role: Senior Full Stack Web Developer, Senior Web Developer, Senior Developer, Senior Full-Stack Developer, Senior Front End Developer, Full Stack Developer, Senior ...
FEATURED
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Location: London, Hybrid EC4R 9AD - Salary: Competitive, DOE, + Excellent Benefits! Contract Type: Full Time, Permanent - What We Can Offer You: 25 Days Annual Leave (Pro-Rata for Part-time and Fixed-Term Roles), Additional Holiday Purchase, Hybrid Working, Life Assurance, Vitality Private Healthcare, Subsidised Gym Memberships, Cycle to Work scheme, Discount Vouchers and Access to Wellbeing Resources - Why Do We Want You - At Axco, part of Wilmington plc, we're developing data driven products that support the global insurance market, and we're looking for someone who can help shape how those products use and present data. This role will give you the space to design and refine Power BI models, dashboards and analytics that sit at the core of our customer facing tools. You'll work closely with colleagues across product, engineering and data to translate real business needs into ...
Location: London, Hybrid EC4R 9AD - Salary: Competitive, DOE, + Excellent Benefits! Contract Type: Full Time, Permanent - What We Can Offer You: 25 Days Annual Leave (Pro-Rata for Part-time and Fixed-Term Roles), Additional Holiday Purchase, Hybrid Working, Life Assurance, Vitality Private Healthcare, Subsidised Gym Memberships, Cycle to Work scheme, Discount Vouchers and Access to Wellbeing Resources - Why Do We Want You - At Axco, part of Wilmington plc, we're developing data driven products that support the global insurance market, and we're looking for someone who can help shape how those products use and present data. This role will give you the space to design and refine Power BI models, dashboards and analytics that sit at the core of our customer facing tools. You'll work closely with colleagues across product, engineering and data to translate real business needs into ...
FEATURED
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- Moorgate
- Canary Wharf
- Charing Cross
- Euston
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- Grays Inn
- Haddenham
- Hampton
- Hinxton
- Littlemore
- City of London
- Cambridge
- Central London
- West End
- Reading
- Bracknell
- Harlow
- Oxford
- East London
- Farnborough
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