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Salaries
Date posted
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Job types
Locations
- Southwark
- Moorgate
- The City, City (EC3)
- Canary Wharf
- Charing Cross
- Datchet Common
- Farnborough Park
- Grays Inn
- Greenwich
- Holborn
- City of London
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- London
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5 Permanent API jobs in West Sussex + 20 miles
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You will be working in a large team of engineers, product people, designers, and QA to build the Backend for Frontend API layer consumed by American Express travel mobile app.
You will be working in a large team of engineers, product people, designers, and QA to build the Backend for Frontend API layer consumed by American Express travel mobile app.
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£55,000 £65,000 DOE | Hybrid Working (1x day a month office) Are you a seasoned developer with a passion for building robust, real-time communications platforms? Looking for a role where you can work on complex, enterprise-grade systems while still being close to the technical detail? This is an opportunity to join a well-established technology business with a strong reputation in communications and cloud-based solutions. Youll be part of a small, highly skilled development team working on the evolution of a large-scale SIP platform and its associated APIs, with plenty of scope to influence design, tooling, and future direction. The Role - Working closely with the Development Manager, youll play a key role in enhancing and extending an existing SIP and VoIP platform used in production environments.
£55,000 £65,000 DOE | Hybrid Working (1x day a month office) Are you a seasoned developer with a passion for building robust, real-time communications platforms? Looking for a role where you can work on complex, enterprise-grade systems while still being close to the technical detail? This is an opportunity to join a well-established technology business with a strong reputation in communications and cloud-based solutions. Youll be part of a small, highly skilled development team working on the evolution of a large-scale SIP platform and its associated APIs, with plenty of scope to influence design, tooling, and future direction. The Role - Working closely with the Development Manager, youll play a key role in enhancing and extending an existing SIP and VoIP platform used in production environments.
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Job Title: Retailer Systems Project Consultant - Location: Hybrid, 2 days in the office (Farnborough) Salary: Competitive + Performance Bonus - Job type: Full time, Permanent - Working Hours: 40 Hours Per Week - Application Deadline: 3rd April 2026 - The Retailer Systems Project Consultant is responsible for supporting, coordinating, and delivering sales and CRM projects within our client's Network Digitalisation department. These projects will primarily focus on providing state of the art systems for the wider Retailer Network. This role ensures that initiatives are completed on time, within budget, and to the desired quality standards, whilst aligning with strategic business objectives. The Project Consultant will be actively involved in the planning, testing, execution and deployment of new retailer systems, upgrades, and technology rollouts, working collaboratively with ...
Job Title: Retailer Systems Project Consultant - Location: Hybrid, 2 days in the office (Farnborough) Salary: Competitive + Performance Bonus - Job type: Full time, Permanent - Working Hours: 40 Hours Per Week - Application Deadline: 3rd April 2026 - The Retailer Systems Project Consultant is responsible for supporting, coordinating, and delivering sales and CRM projects within our client's Network Digitalisation department. These projects will primarily focus on providing state of the art systems for the wider Retailer Network. This role ensures that initiatives are completed on time, within budget, and to the desired quality standards, whilst aligning with strategic business objectives. The Project Consultant will be actively involved in the planning, testing, execution and deployment of new retailer systems, upgrades, and technology rollouts, working collaboratively with ...
PREMIUM
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Software Developer
Software Developer
Crowd Link Consulting Ltd
Woking (GU21)
From £45,000 to £65,000 per annum Salary + Benefits + Bonus
Web API, HTML, CSS, Web Services, JQuery and JavaScript
Web API, HTML, CSS, Web Services, JQuery and JavaScript
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Proven track record in consultative selling within enterprise software, preferably in iPaaS, integration, API management, or cloud domains * Engage with the latest in AI-powered integration, API management, and intelligent automation through DXC's strategic alliance with Boomi
Proven track record in consultative selling within enterprise software, preferably in iPaaS, integration, API management, or cloud domains * Engage with the latest in AI-powered integration, API management, and intelligent automation through DXC's strategic alliance with Boomi
PREMIUM
291 exact matches jobs are outside your preferred location
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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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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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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
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
Senior Java Developer – AWS Cloud Backend
Senior Java Developer – AWS Cloud Backend
Intelligent Talent Solutions Ltd
Bracknell (RG12)
From £75,000 to £90,000 per annum Pension, staff discounts, medical
Experience building platforms supporting mobile or API-driven products
Experience building platforms supporting mobile or API-driven products
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Strong technical depth across Adobe Digital Experience and Digital Media solutions, plus broad knowledge of cloud architectures, API integrations, data platforms, and third-party ecosystem technologies
Strong technical depth across Adobe Digital Experience and Digital Media solutions, plus broad knowledge of cloud architectures, API integrations, data platforms, and third-party ecosystem technologies
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Support integrations (native + API-based) with IT and Data teams.
Support integrations (native + API-based) with IT and Data teams.
AI Architect
AI Architect
DCV Technologies Limited
North West London (NW1)
From £125,000 to £165,000 per annum + Multiple Benefits
Experience with Kubernetes, Docker, microservices, API integration
Experience with Kubernetes, Docker, microservices, API integration
FEATURED
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Applications Support Analyst / Engineer
Applications Support Analyst / Engineer
Kudos Partners
Datchet Common, Slough (SL3), SL3
Up to £75,000 per annum plus 12% bonus - generous benefits package
API support and monitoring tools (e.g., SolarWinds, AzureAppInsights)
API support and monitoring tools (e.g., SolarWinds, AzureAppInsights)
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Assist with API integration and monitoring using API Management platforms. * Understanding of WAF and API security basics.
Assist with API integration and monitoring using API Management platforms. * Understanding of WAF and API security basics.
FEATURED
)
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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Application Support Analyst (Business Central)
Application Support Analyst (Business Central)
360 Resourcing
Slough (SL1), SL1 4DX
£40000.00 to £44000.00 per year Hybrid working, Bonus and superb Bene
Troubleshoot API connections, reviewing payloads, authentication, and performance to maintain stability.
Troubleshoot API connections, reviewing payloads, authentication, and performance to maintain stability.
FEATURED
)
Senior C#.Net Software Engineer
Senior C#.Net Software Engineer
Data Careers
Southwark, South East London (SE1), SE1
£80000 - £90000 per annum
Good understanding of authentication and security (OAuth, JWT, API security)
Good understanding of authentication and security (OAuth, JWT, API security)
Related Jobs
Locations
- Southwark
- Moorgate
- The City, City (EC3)
- Canary Wharf
- Charing Cross
- Datchet Common
- Farnborough Park
- Grays Inn
- Greenwich
- Holborn
- City of London
- Central London
- West End
- South East London
- Bracknell
- Reading
- South West London
- Uxbridge
- Kingston Upon Thames
- Southampton
- London
- Berkshire
- Hampshire
- Surrey
- Buckinghamshire
- Kent
- Hertfordshire
- West Sussex
- South East