1 to 25 of 131 API Design Jobs

Integration Architect

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
within our DNA. Invest in us andwellinvest in you!. Job Description We are looking for an experienced Integration Solutions Architect to lead the design, governance and modernisation of enterprise integration solutions across cloud-native, legacy and external partner environments. The role will have a strong focus on Microsoft … Azure and Azure API Management (APIM) , designing secure, scalable and resilient integration architectures. You will work closely with engineering, platform, DevOps and architecture teams to establish API standards, integration patterns, automated deployment approaches and secure connectivity across Azure environments. Key Responsibilities Lead the end-to-end architecture ...

Snr Java Developer (API Development)

Hiring Organisation
TXP Technology x People
Location
Telford, Shropshire, United Kingdom
Employment Type
Full-Time
Salary
£550.00 - £551.00 per day
Senior Java Backend Developer - API & Microservices Modernisation Location: Telford - minimum 2 days per month onsite, remaining time remote Contract Length: 12 months Rate: £550 per day IR35: Inside IR35 Start Date: Candidates must be available to start w/c 4 January 2027 Client: Central Government The Role … microservices, with a strong focus on scalability, resilience, maintainability and integration with existing systems. Essential Skills Java - Strong backend development experience. Spring Boot - RESTful API and microservices development. Microservices Design - Experience designing scalable, resilient and loosely coupled microservices, including service-to-service communication. API Design - Strong ...

Snr Java Developer (API Development)

Hiring Organisation
TXP
Location
Telford, Shropshire, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £551/day Inside IR35
Senior Java Backend Developer - API & Microservices Modernisation Location: Telford - minimum 2 days per month onsite, remaining time remote Contract Length: 12 months Rate: £550 per day IR35: Inside IR35 Start Date: Candidates must be available to start w/c 4 January 2027 Client: Central Government The Role … microservices, with a strong focus on scalability, resilience, maintainability and integration with existing systems. Essential Skills Java - Strong backend development experience. Spring Boot - RESTful API and microservices development. Microservices Design - Experience designing scalable, resilient and loosely coupled microservices, including service-to-service communication. API Design - Strong ...

Microsoft Full Stack Senior Developer (Manager)

Hiring Organisation
Accenture
Location
London, UK
Employment Type
Full-time
Stack Senior Developer who combines strong hands-on engineering expertise with end-to-end technical delivery leadership. You will lead engineering teams, shape solution design, make pragmatic technology decisions and remain close enough to the code to assure quality and unblock delivery. In this highly visible role, you will … lifecycle, from strategy and solution shaping through engineering delivery, transition to live service and ongoing optimisationIn our team, you will: Engineering and architectureLead the design and hands-on development of enterprise applications using C#, .NET, ASP.NET Core, Web APIs and modern distributed application patterns. Design responsive, accessible front ...

Senior Software Engineer (Full Stack) — Java & React

Hiring Organisation
Zühlke Engineering
Location
London, UK
Employment Type
Full-time
maintain high standards of engineering quality. How you will make an impact Build and maintain reliable JVM-based services using Kotlin or modern Java. Design and develop APIs and integrations following industry standards. Contribute to API design standards and documentation. Deliver complete end-to-end features … Understanding the difference between relational, NoSQL and other persistence technologies. Experience building shared platforms, common services or greenfield technical foundations. Building APIs adhering to design principles such as RESTful API design Building observable systems Experience in regulated or financial-services environments. Exposure to payments, transaction processing ...

Senior Software Engineer (Full Stack) — Java & React

Hiring Organisation
Zühlke Engineering
Location
Manchester, UK
Employment Type
Full-time
maintain high standards of engineering quality. How you will make an impact Build and maintain reliable JVM-based services using Kotlin or modern Java. Design and develop APIs and integrations following industry standards. Contribute to API design standards and documentation. Deliver complete end-to-end features … Understanding the difference between relational, NoSQL and other persistence technologies. Experience building shared platforms, common services or greenfield technical foundations. Building APIs adhering to design principles such as RESTful API design Building observable systems Experience in regulated or financial-services environments. Exposure to payments, transaction processing ...

Application Architect

Hiring Organisation
London Stock Exchange Group
Location
London, UK
Employment Type
Full-time
Come join the Risk Intelligence Content Curation and Distribution team as an Application Architect, and help drive application design, as we support our World-Check customers in protecting against sanctions evasion, money laundering, human trafficking, terrorisim and more! Role summary: The Application Architect plays a key technical role within … this role contributes to their the architecture and technical direction on the Risk Content Curation and Distribution PlatformThis role focuses on application‐level architecture, design quality, and technical guidance, working closely with Solution Architects, Product Owners, and engineering teams. You will help translate business and non‐functional requirements into ...

Senior Platform Engineer

Hiring Organisation
WTW
Location
Reigate, Surrey, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
technical input, guidance and leadership to the team (including code quality, best practices, processes, some aspects of release management, etc.). Assist in the design and documenting of solutions meeting functional and non-functional requirements. Lead by example getting directly involved in the day-to-day delivery of work … control plane engineering Practical experience designing and developing management and controlplane capabilities for line of business or SaaS applications, including stack/environment management, API design for platform services, and developer/operator UX. Experience working with or designing Azure stamp-based or scale-unit architectures, including multi ...

Senior Python Django Developer

Hiring Organisation
RWS
Location
London, UK
Employment Type
Full-time
Please note that this is a hybrid role at either our Sheffield or London office. Job Overview Key ResponsibilitiesDelivery and technical craft Lead the design and delivery of back-end features, APIs and integrations across our core applications, from requirement through to release. Ensure clean, maintainable and well-tested … standard that the rest of the team works to. Own architectural decisions within the back-end codebase, including service boundaries, data models and API design, making sure they are documented, understood and applied consistently. Design and optimise PostgreSQL schemas and queries so that our applications stay fast ...

Solution Architect

Hiring Organisation
ISR RECRUITMENT LIMITED
Location
Nationwide, United Kingdom
Employment Type
Contract
Contract Rate
£540 - £560/day (Outside IR35)
strong software engineering background who can turn complex requirements into clear designs and practical development tasks. Working alongside established delivery squads, you will design and assure technical solutions, resolve complex integration challenges and translate architecture into actionable engineering work and shape solutions across interconnected platforms and external services. Your … work will span API design, systems integration, platform enhancements and technical migrations, taking solutions from initial design through assurance and into implementation. Skills and Experience: Proven Solution Architecture experience combined with a strong software engineering background. Expertise in API design, system integration and cloud-based ...

Senior Software Development Engineer

Hiring Organisation
Expedia
Location
London, UK
Employment Type
Full-time
with a growth mindset. We value our team culture and work together from the office three times a week. In this role, you will: Design, build, and maintain robust full stack applications and scalable services across multiple domains, applying deep technical expertise and architectural skills. Lead … development process, including system design, API design, and data modelling, ensuring quality and maintainability of solutions. Collaborate across engineering, product, and business teams to define requirements, deliver impactful features, and drive technology strategy. Mentor and guide engineers, fostering best practices in coding, testing, and operational excellence within ...

Director Data & Analytics API Experience - Data Services

Hiring Organisation
CME- Group
Location
Belfast, UK
Employment Type
Full-time
Director Data & Analytics API Experience - Data ServicesBackground: CME Group runs some of the world's largest and most important trading venues, including derivatives exchanges, FX/FI platforms. The trading participants include leading investment banks, hedge funds, proprietary trading firms, investment managers, and retail traders, as well as additional … stakeholders such as independent software vendors (ISVs) and data redistributors. To support our unique data and analytics products, we are now building a unified API-first distribution framework, simplifying consumption and value extraction. The Role: We are seeking a key stakeholder for the CMEG External Data-Analytics (DA) APIs ...

Director Data & Analytics API Experience - Data Services

Hiring Organisation
CME- Group
Location
London, UK
Employment Type
Full-time
Director Data & Analytics API Experience - Data ServicesBackground: CME Group runs some of the world's largest and most important trading venues, including derivatives exchanges, FX/FI platforms. The trading participants include leading investment banks, hedge funds, proprietary trading firms, investment managers, and retail traders, as well as additional … stakeholders such as independent software vendors (ISVs) and data redistributors. To support our unique data and analytics products, we are now building a unified API-first distribution framework, simplifying consumption and value extraction. The Role: We are seeking a key stakeholder for the CMEG External Data-Analytics (DA) APIs ...

SAP BTP Integration Architect

Hiring Organisation
Vbeyond
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
govern the end-to-end integration strategy for the S/4HANA Bluefield migration, ensuring alignment with enterprise architecture principles. Architect BTP Solutions: Design and architect robust integration scenarios using the full suite of SAP BTP services, with a heavy focus on SAP Integration Suite (Cloud Integration/… API Management, and Event Mesh. Govern Technical Design: Lead design authority sessions to review and approve all integration patterns, ensuring they are standard, reusable, and fit for purpose. Bluefield Migration Expertise: Provide expert guidance on the unique integration challenges of a Bluefield (system conversion) migration, including ...

Senior Backend Product Engineer

Hiring Organisation
CAIS
Location
London, UK
Employment Type
Full-time
Senior Backend Product Engineer to join our Capital Markets technology team in London. This is a hybrid, hands-on role: you'll design, build and run systems across Pre-Trade, Trade and Post-Trade, covering Structured Investments, Equity IPOs, Hedging & Monetization, ETFs, and more. … integration and end-to-end tests, with good judgment about what to test at each levelStrong experience with Spring (Boot, Data, Security), relational database design, REST API design, and Kafka or a similar event streaming platform Experience working AI-first: using AI agents to build software, with ...

Senior Full Stack Java Engineer

Hiring Organisation
Luxoft
Location
London, UK
Employment Type
Full-time
Project description As a Senior Full Stack Java Engineer within the US Corporate Loans POD, you will design, develop, and deliver enterprise integration solutions connecting Loan IQ with upstream and downstream platforms. You will leverage modern cloud-native technologies, AI-assisted development tools, and Agentic AI practices to improve … building AI agents and intelligent engineering solutions that automate and enhance Software Development Lifecycle (SDLC) processes, improving developer productivity and accelerating delivery outcomes. Responsibilities Design and develop REST APIs, event-driven integrations, and messaging interfaces. Build and maintain integrations between Loan IQ and enterprise applications. Design and implement ...

Solution Architect

Hiring Organisation
Optimizely
Location
London, UK
Employment Type
Full-time
reaches general availability and Professional Services delivery can run it independently. After general availability, Delivery leads and you provide background support. On ESAI, you design and build the AI systems that advance Professional Services delivery. This is a small, growing team, so responsibilities span architecture, engineering, documentation, and enablement. … high bar regardless of background. The role requires identifying where AI improves delivery economics, and building the solutionJob Responsibilities Architect AI-driven solutions. Design agents, integrations, and automation that change how engagements are delivered. Solutions should be reusable across accounts, not one-off scripts. Lead delivery through GA. ...

Senior Software Architect - C#/.NET & Distributed Systems

Hiring Organisation
Computer Futures
Location
United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 100,000 Annual
market-leading Warehouse Control System platform. This position will suit a hands-on architect who enjoys working across the full software lifecycle, from solution design and architecture through to technical leadership, customer engagement and delivery. You'll help shape the future direction of a highly scalable warehouse automation platform … scalable and capable of supporting increasingly sophisticated automation technologies. Key Responsibilities Own and define application, integration, deployment and data architecture across the WCS platform. Design scalable, resilient and maintainable software solutions using modern Microsoft technologies. Collaborate with engineering teams to establish architectural standards, development frameworks and technical governance. Lead ...

Solution Architect

Hiring Organisation
NTT DATA
Location
London, UK
Employment Type
Full-time
team you'll be working with: We are looking for a Solution Architect to help our clients design and deliver modern, scalable and secure digital solutions, primarily on Microsoft technologies. You will combine architecture leadership with client-facing consulting. That means working directly with stakeholders to understand their goals … shaping technical options and trade-offs, and guiding delivery teams to implement the design safely. This role suits someone who enjoys turning ambiguity into clear decisions, can explain technology, and is happy getting close to the code when needed. What you'll be doing: Discovery and stakeholder engagementLead workshops ...

Full Stack Developer

Hiring Organisation
MJA (London) Ltd
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
consumers, topics, partitions and consumer groups Cloud: AWS application deployment and support DevOps: CI/CD pipeline implementation and automation Containers: Docker APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance … optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway, SQS, SNS and EventBridge Redis and distributed caching CloudWatch, ELK/OpenSearch, Datadog, Prometheus, Grafana or Splunk OAuth 2.0/JWT and API security AWS certification Experience ...

Full Stack Developer

Hiring Organisation
MJA (London) Ltd
Location
EC3, Broad Street, Greater London, United Kingdom
Employment Type
Contract
consumers, topics, partitions and consumer groups Cloud: AWS application deployment and support DevOps: CI/CD pipeline implementation and automation Containers: Docker APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance … optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway, SQS, SNS and EventBridge Redis and distributed caching CloudWatch, ELK/OpenSearch, Datadog, Prometheus, Grafana or Splunk OAuth 2.0/JWT and API security AWS certification Experience ...

Lead Software Developer

Hiring Organisation
Bytes Software Services
Location
Leatherhead, Surrey, UK
Employment Type
Full-time
sustainability PURPOSE OF JOB: We are looking for a proactive, product-minded C# Developer to join our small, agile engineering team. The role will design, build and support secure, scalable applications across the full technology stack, with a strong focus on clean architecture, test-driven development and reliable delivery. … hats, learning new technologies and collaborating closely with product managers, designers and engineers to deliver user-centred solutions and drive technical excellence. KEY RESPONSIBILITIES: Design & Develop: Build and maintain backend services in C# using .NET Core/.NET 9, with a focus on clean architecture, scalability and maintainability. Full ...

Senior Java Backend Developer Fully Remote

Hiring Organisation
Interact Consulting Limited
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
health tech clients Integrations team, building secure, reliable payment capabilities for their platform, a cloud-based SaaS platform used across the UK. You'll design and deliver integrations with leading providers including Stripe, Dojo and Adyen, powering online payment links, card-present payments, and automated debt chasing. What … Build and maintain secure, resilient Java microservices and third-party integrations. Own services end to end: design, build, test, deploy, monitor and improve them in production. Shape technical decisions with Product, QA and your Team Lead. Coach junior developers and QA colleagues. What we're looking for 5+ years ...

Solutions Architect

Hiring Organisation
Euro Car Parks
Location
Central London, London, United Kingdom
Employment Type
Permanent
Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

Solutions Architect

Hiring Organisation
Euro Car Parks
Location
Islington, United Kingdom
Salary
100000
Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: · The design ...