101 to 125 of 289 REST Jobs in London

based in London - Contract - Hybrid *outside iR35* What You'll Be Doing Designing and developing enterprise-grade solutions in an Agile team. Building and maintaining middleware services using C# , REST APIs , FIX messaging , XML , and Microservices . Leading architecture discussions, code reviews, and release management. Collaborating with users and cross-functional teams to define and execute testing strategies. Mentoring junior More ❯

with Cypress or Playwright Background in back-end/data-focused projects, with the ability to drive data testing strategies. Experience with API testing tools, such as Postman or REST-assured Experience leading and managing QA Engineers within a team Strong working knowledge of CI/CD tools, including Jenkins, GitLab CI, or Azure DevOps. Experience working/Testing with More ❯

with Cypress or Playwright Background in back-end/data-focused projects, with the ability to drive data testing strategies. Experience with API testing tools, such as Postman or REST-assured Experience leading and managing QA Engineers within a team Strong working knowledge of CI/CD tools, including Jenkins, GitLab CI, or Azure DevOps. Experience working/Testing with More ❯

with Cypress or Playwright Background in back-end/data-focused projects, with the ability to drive data testing strategies. Experience with API testing tools, such as Postman or REST-assured Experience leading and managing QA Engineers within a team Strong working knowledge of CI/CD tools, including Jenkins, GitLab CI, or Azure DevOps. Experience working/Testing with More ❯

with Cypress or Playwright Background in back-end/data-focused projects, with the ability to drive data testing strategies. Experience with API testing tools, such as Postman or REST-assured Experience leading and managing QA Engineers within a team Strong working knowledge of CI/CD tools, including Jenkins, GitLab CI, or Azure DevOps. Experience working/Testing with More ❯

junior developers What you ll bring 5+ years e-commerce development (front-end & back-end) Strong JavaScript (ES6+), Node.js, HTML/CSS skills Hands-on SFCC/SFRA experience REST APIs, Git, CI/CD, and best-practice mindset Passion for creating seamless, luxury digital shopping experiences What s on offer Hybrid working 3 days onsite in Uxbridge Competitive salary More ❯

junior developers What you’ll bring 5+ years’ e-commerce development (front-end & back-end) Strong JavaScript (ES6+), Node.js, HTML/CSS skills Hands-on SFCC/SFRA experience REST APIs, Git, CI/CD, and best-practice mindset Passion for creating seamless, luxury digital shopping experiences What’s on offer Hybrid working – 3 days onsite in Uxbridge Competitive salary More ❯

tech stack using Java, Spring Boot, CI/CD, Kubernetes, AWS, EKS and Grafana/Splunk. About you: You have advanced backend software engineering experience with Java, Spring Boot, REST, Postgres, Redis You have experience of running production workloads on Kubernetes (Amazon EKS preferred) You have a good knowledge of DevOps practices including CI/CD, IaC (Terraform) and container More ❯

tech stack using Java, Spring Boot, CI/CD, Kubernetes, AWS, EKS and Grafana/Splunk. About you: You have advanced backend software engineering experience with Java, Spring Boot, REST, Postgres, Redis You have experience of running production workloads on Kubernetes (Amazon EKS preferred) You have a good knowledge of DevOps practices including CI/CD, IaC (Terraform) and container More ❯

Role Deliver new backend functionality in modern .NET (C#/.NET 8) Help integrate and validate React UIs Contribute to ongoing rebuild and refactor of legacy systems Work with REST & GraphQL APIs for third-party platform integrations Collaborate closely with a small, experienced team in a flat structure Remote-first – work from anywhere in the UK Tech Stack Backend: .NET More ❯

experience building and maintaining automated test frameworks (e.g. Selenium) * Integration of automated suites into CI/CD pipelines (Jenkins, GitLab CI, Azure DevOps, etc.) * Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI * Experience validating middleware and data flows (e.g. SAP CPI, PI/PO) * Data Validation & ETL Testing - strong SQL skills for More ❯

workflows - including card acquiring, alternative payment methods or digital wallets Strong problem-solving and communication skills, with the ability to translate business objectives into robust technical solutions Experience with REST APIs, SQL, and modern web technologies (JavaScript/React/Python/Postman API preferred) Familiarity with payment gateways, transaction routing and compliance frameworks (e.g. PCI DSS, PSD2, or Open More ❯

workflows - including card acquiring, alternative payment methods or digital wallets Strong problem-solving and communication skills, with the ability to translate business objectives into robust technical solutions Experience with REST APIs, SQL, and modern web technologies (JavaScript/React/Python/Postman API preferred) Familiarity with payment gateways, transaction routing and compliance frameworks (e.g. PCI DSS, PSD2, or Open More ❯

workflows - including card acquiring, alternative payment methods or digital wallets Strong problem-solving and communication skills, with the ability to translate business objectives into robust technical solutions Experience with REST APIs, SQL, and modern web technologies (JavaScript/React/Python/Postman API preferred) Familiarity with payment gateways, transaction routing and compliance frameworks (e.g. PCI DSS, PSD2, or Open More ❯

workflows - including card acquiring, alternative payment methods or digital wallets Strong problem-solving and communication skills, with the ability to translate business objectives into robust technical solutions Experience with REST APIs, SQL, and modern web technologies (JavaScript/React/Python/Postman API preferred) Familiarity with payment gateways, transaction routing and compliance frameworks (e.g. PCI DSS, PSD2, or Open More ❯

into the architecture landscape. What We're Looking For Extensive experience in enterprise and solution architecture , ideally within large-scale, regulated environments. Proven track record designing API-centric solutions (REST, SOAP, GraphQL) and implementing event-driven patterns . Strong understanding of integration architectures , microservices , and services-based delivery models . Solid knowledge of Java, .NET, SQL, and SOA environments, plus More ❯

the use of AI and automation to enhance productivity across the team. What experience do I need: Strong background building and scaling Python-based systems (FastAPI, Flask, or Django REST). Proven leadership experience in a development environment Solid expertise in microservices, APIs, messaging patterns, and distributed systems. Proficient with cloud platforms (AWS, GCP, Azure) and containerisation (Docker; Kubernetes preferred More ❯

Spring Boot. You bring solid cloud experience (preferably AWS) and are confident working with Kubernetes and Docker . You’re skilled with messaging systems and APIs (Kafka, ActiveMQ, JMS, REST, CometD). You have hands-on experience with databases (DB2, MongoDB, MySQL). You understand caching technologies . You’re familiar with build tools (Maven), web servers (Jetty, Tomcat), and More ❯

learning. The skills you'll need: 5+ years' experience as a Salesforce Developer with strong expertise in Apex, Visualforce, and LWC. Proven experience integrating Salesforce with other platforms via REST/SOAP APIs or middleware (e.g. MuleSoft). Hands-on experience with Experience Cloud customisation and configuration. Strong knowledge of Salesforce security, governor limits, and performance best practices. Proficiency in More ❯

programs in regulated industries. • Experience influencing executive stakeholders and aligning technology initiatives with business strategy. • Demonstrated success in establishing API governance frameworks and architectural standards. Technical Expertise • Understanding of REST/JSON, OpenAPI, OAuth2, JWT, API security (e.g. JWS, JWE, PKCE, OIDC).. • Proficiency in API management platforms (e.g., Azure API Management, Apigee). • Experience with integration technologies (e.g. Kafka More ❯

programs in regulated industries. • Experience influencing executive stakeholders and aligning technology initiatives with business strategy. • Demonstrated success in establishing API governance frameworks and architectural standards. Technical Expertise • Understanding of REST/JSON, OpenAPI, OAuth2, JWT, API security (e.g. JWS, JWE, PKCE, OIDC).. • Proficiency in API management platforms (e.g., Azure API Management, Apigee). • Experience with integration technologies (e.g. Kafka More ❯

programs in regulated industries. • Experience influencing executive stakeholders and aligning technology initiatives with business strategy. • Demonstrated success in establishing API governance frameworks and architectural standards. Technical Expertise • Understanding of REST/JSON, OpenAPI, OAuth2, JWT, API security (e.g. JWS, JWE, PKCE, OIDC).. • Proficiency in API management platforms (e.g., Azure API Management, Apigee). • Experience with integration technologies (e.g. Kafka More ❯

programs in regulated industries. • Experience influencing executive stakeholders and aligning technology initiatives with business strategy. • Demonstrated success in establishing API governance frameworks and architectural standards. Technical Expertise • Understanding of REST/JSON, OpenAPI, OAuth2, JWT, API security (e.g. JWS, JWE, PKCE, OIDC).. • Proficiency in API management platforms (e.g., Azure API Management, Apigee). • Experience with integration technologies (e.g. Kafka More ❯

different paradigms (e.g.: JavaScript/TypeScript, Python, C or C++, Haskell, etc.) Experience collaborating with AI researchers and bridging between research-focused and engineering-focused teams Experience building & scaling REST APIs , particularly those conforming to JSON:API Comfortable working on infrastructure (e.g., setting up CI pipelines, navigating Kubernetes) If you have a personal or open-source project you'd like More ❯

principles, including state management patterns (such as Redux or Context API) and responsive design techniques for optimal usability across devices. Hands-on familiarity with WebSockets, real-time messaging protocols, REST APIs, and micro-frontend architectural patterns to enable seamless system integration. Experience in financial services ideally trading environment Excellent communication skills A track record of contributing positively to team culture More ❯