26 to 50 of 134 REST Jobs in the City of London

NetSuite tools (min. 3 years) Strong understanding of ERP systems, business processes, and workflows, especially within NetSuite. Proficiency in JavaScript, SuiteScript, and other relevant web technologies (HTML, CSS, XML, REST/SOAP). Hands-on experience integrating NetSuite with third-party systems and external APIs. Solid understanding of relational databases and experience working with saved searches, SQL and SuiteAnalytics Connect. More ❯

platforms (e.g., OpenAI, Bedrock, Gemini, Anthropic). Knowledge of cloud infrastructure (ideally AWS), Kubernetes, and relevant SDKs (e.g., boto3, confluent-kafka). Experience deploying ML models in production using REST APIs, microservices, and Docker containers. Understanding of NLP, LLMs, and prompt engineering techniques. Proficient in version control, CI/CD pipelines, and test-driven development. Nice to Have: Experience within More ❯

scalable backend services and data pipelines - written in Python and deployed with Docker & Kubernetes. Integrate with enterprise ecosystems- enterprise software systems such as SAP and Oracle ERP, GraphQL/REST APIs, SFTP feeds, and event buses (Kafka, Pulsar). Wrangle large, heterogeneous data sets —model, transform, and index multi-modal, multi-terabyte enterprise datasets for advanced AI workloads Develop enterprise More ❯

interfaces. This role combines leadership, hands-on development, and the chance to influence technology decisions from day one. 🛠️ Tech Stack & Tools Frontend: Angular (preferred), React Cloud: Microsoft Azure Other: REST APIs, CI/CD, Figma or similar design tools, Git, Agile/Scrum ✅ What We're Looking For Proven experience leading frontend development for enterprise applications Strong expertise in Angular More ❯

experience in software engineering with deep expertise in Java (Java 11 or later). Strong experience in designing microservices and distributed systems. Solid grasp of Spring/Spring Boot, REST APIs, messaging (Kafka/RabbitMQ), and cloud-native development. Proven leadership in technical decision-making and mentoring developers. Experience with cloud platforms (AWS, GCP, or Azure). A strong security More ❯

of CI/CD pipelines, Docker, and Kubernetes deployments • Hands-on experience with either AWS or GCP • Comfortable with collaborative environments and pair programming • Strong grasp of Agile methodologies, REST APIs, and test-driven development Why this role stands out... • A senior-level Staff Engineer role with clear scope for progression • Hybrid working with just one or two days in More ❯

as Employee Central, Recruiting, Learning, and Performance modules. • Proficiency in using Dell Boomi for data mapping, transformations, and process automation. • Hands-on experience with Boomi connectors (e.g., SAP SuccessFactors, REST, SOAP, database, etc.). • In-depth understanding of integration concepts, EAI, middleware, and cloud architectures. • Familiarity with HR processes and data management in SAP SuccessFactors. • Strong programming skills in JavaScript More ❯

mobile-friendly designs that ensure cross-platform compatibility Translate wireframes and prototypes into polished, production-ready applications in collaboration with UX/UI designers Integrate front-end interfaces with REST and GraphQL APIs, as well as back-end systems Ensure high-quality, maintainable code through testing, debugging, and adherence to best practices Stay current with emerging UI/UX technologies More ❯

across the estate. You’ll be working closely with infrastructure, architecture, and infosec teams to support high-availability production systems. The role also involves guiding CI/CD improvements, REST API design, and steering collaborative technical decisions across squads. What they’re looking for: Proven experience supporting large-scale, business-critical systems Strong background in Java and ideally C# Some … focused. Comfortable working with legacy systems and large enterprise environments Confident leading technical conversations across multiple engineering disciplines Experience with CI/CD pipelines and modern deployment practices Greenfield REST API design including HATEOAS implementation Angular, React or frontend exposure Familiarity with Snowflake or backend SQL variants This is a great opportunity for an experienced Java Developer to join a More ❯

Node.js Software Developer – Healthcare Startup – London (Tech Stack: JavaScript, Vue.js, React, Node.js, NestJS, REST APIs, Git, Agile Methodologies) Company Overview: Join a mission-driven healthcare startup that’s transforming patient care through cutting-edge digital solutions. We are seeking a talented Software Developer who thrives in dynamic startup environments and wants to build technology that genuinely impacts lives. If you … and Node.js. Familiarity with backend frameworks such as Express or NestJS (desirable). Experience working in or strong enthusiasm for startup environments. Solid understanding of modern development practices, including REST APIs, Git, and agile workflows. Excellent communication and problem-solving skills. Right to work in the UK. Benefits: Hybrid working model – 3 days per week in our central London office. More ❯

efforts and mentoring team members, while collaborating with globally distributed teams in the US, Ireland and India. Responsibilities: Design, develop, and maintain Java-based backend services using Spring Boot , REST/GraphQL , Kafka , PostgreSQL , and RabbitMQ . Contribute to infrastructure modernisation efforts, working closely with DevOps teams on Kubernetes , CI/CD pipelines , and legacy system migrations. Innovate across the … collaboration. Work closely with cross-functional teams, including product and engineering groups in the US, Ireland and India, to ensure alignment and execution. Build and deploy secure, resilient APIs (REST/GraphQL) and optimise the full software development lifecycle through automation. Requirements: 7–10+ years of professional experience in software engineering, with a strong focus on Java backend development . More ❯

impact financial technology initiatives. Key Responsibilities: Develop, test, and deploy customized solutions within the Salesforce Sales Cloud environment Design and implement integrations between Salesforce and internal/external systems (REST/SOAP APIs) Collaborate with business analysts and stakeholders to gather requirements and translate them into technical solutions Maintain and optimize Salesforce architecture, ensuring scalability and performance Provide ongoing support … of hands-on Salesforce development experience Strong understanding of Sales Cloud and Salesforce platform capabilities Proficient in Apex, Lightning Web Components (LWC), SOQL, and Flow Experience with API integrations (REST/SOAP) and middleware tools (e.g., Mulesoft, Zapier, etc.) Salesforce Platform Developer I certification (Developer II is a plus) Familiarity with CI/CD tools and source control (e.g., Git More ❯

you. Key Responsibilities: Communicate clearly, seek clarification when needed. Navigate ambiguity and working with minimal supervision. Develop and maintain backend services using C# and .NET Core. Design and test REST APIs with JWT-based authentication (OAuth is desirable for the future). Write performant SQL for PostgreSQL databases; help design schemas and queries. Build and manage WebSocket connections for real … backend experience with C# (.NET Core) in Linux-based production environments. Comfortable navigating ambiguity and working with minimal supervision. Strong SQL knowledge, with experience using PostgreSQL in live systems. REST API development experience; understanding of JWT and cookie-based auth. Familiarity with Docker and AWS services, from a developer perspective. Comfortable with WebSockets. Comfortable with building lightweight frontends in Blazor More ❯

hiring for their enterprise data team who are building a cloud native data platform used by data analysts, scientists, and quantitative investors. The platform involves technologies like Docker, Kubernetes, REST APIs, and multi-language client libraries. Key Responsibilities: Build cloud-based, distributed data solutions. Understand and prioritize investment data needs. Collaborate with users and team members to refine requirements. Design More ❯

applications (covering ES6+, Redux, React Router, Next.js, React Query, or similar). Develop mobile‐first, responsive UIs with clean, scalable, and secure code. Work across the stack, integrating with REST APIs and backend services. Estimate effort, scope technical designs, and communicate clearly with stakeholders. Mentor and share knowledge with team members while learning new technologies. What We're Looking For More ❯

Infrastructure: AWS, EC2, DynamoDB, Docker Tools: Custom eval libraries, observability tooling, real-time agent monitoring systems 🧠 What You’ll Work On Build full-stack features from architecture to production: REST APIs, frontends, and secure backend systems Translate complex AI safety evaluations into intuitive, scalable products for external users Help design and implement tools like: Evaluations API for enterprise-scale AI More ❯

Java, Spring/Spring Boot, Web, Security, ORM, Junit/Mockito, Maven/Gradle. Command of SQL/NoSQL, Hibernate/Spring Data. Demonstrable experience in designing and implementing REST APIs. Solid understanding of modern SDLC practices. Experience in financial applications, Open Banking, AWS, DevOps, Docker/K8S is a plus! Why join my client? Greenfield Project: No legacy systems More ❯

are a strong full stack engineer, proficient in TypeScript or JavaScript and Python. You have experience building high-performance, responsive web applications, and a deep understanding of HTTP protocols, REST APIs, WebSockets, and the DOM. You are comfortable operating across the stack, with strong knowledge of relational databases, web security best practices, and authentication. You have experience architecting distributed systems More ❯

skills Experience with state management libraries (e.g., Zustand) Proficiency in writing clean, testable code with solid test coverage Experience with testing frameworks such as Vitest and Playwright Familiarity with REST or GraphQL API design Ability to write high-quality CSS Independent ownership of deliverables and strong communication skills in a collaborative environment Preferred Qualifications: Experience working on financial risk management More ❯

skills Experience with state management libraries (e.g., Zustand) Proficiency in writing clean, testable code with solid test coverage Experience with testing frameworks such as Vitest and Playwright Familiarity with REST or GraphQL API design Ability to write high-quality CSS Independent ownership of deliverables and strong communication skills in a collaborative environment Preferred Qualifications: Experience working on financial risk management More ❯

experience Proficiency in React.js (or similar frameworks like Vue.js or Angular) Solid understanding of JavaScript, HTML5, and CSS3 Experience with state management tools (Redux, Context API, etc.) Familiarity with REST APIs and WebSocket integrations Passion for creating elegant, accessible user interfaces Nice to Have Experience in building dashboards or fintech user experiences Knowledge of Tailwind CSS, D3.js, or charting libraries More ❯

a narrow focus on the cloud. Our role requirements are primarily for platform engineer with a few years of experience using python. Required skills and experience API servers using REST (swagger, OpenAPI). Python Flask REST API consumer models i.e.http request libraries Asynchronous models of system interaction using pub/sub & messagingusing python Celery, RabbitMQ and/or Airflow. Developing More ❯

and/or Microsoft AI technology stacks. Key skills required: Python, Node, Flask or Django Typescript, React or JavaScript Azure or GCP Deploy code to Google/Azure playgrounds REST and/or GraphQL API's CICD This client is looking to fill these positions ASAP, so if you are interested, please apply using the link below. Alternatively, if you More ❯

but not essential) Nice to haves (in order of priority – at least one or two is needed): AWS services – S3, ECS, AppSync PostgreSQL or NoSQL database experience GraphQL or REST APIs TypeScript React or Svelte (not essential, but helpful for collaboration) To apply – click the link or for a faster response, email Barry.Ansell@HarringtonStarr.com More ❯

issues. The Technology As an Implementation Engineer in the Solutions team, you’ll work primarily with Limio’s Developer Experience, which includes a set of React frameworks, SDK, and REST APIs (detailed at Your work may also involve running JavaScript scripts, investigating issues in the AWS Console, or managing deployments in Terraform. Our applications, managed by the separate Roadmap team … run on the following tech stack: Front-end: ES6, React, Redux, Gatsby Back-end: Node, Express, Lambda, Git, ElasticSearch, DynamoDB Testing: Jest, React Testing Library, Mock Service Worker APIs: REST DevOps: AWS Serverless Technologies, Terraform, Docker About You You should apply if: You have at least 6 months of professional experience with React and Node (essential). You have experience More ❯