51 to 75 of 134 REST Jobs in the City of London

front runner for this position. Nice to haves (in order of priority – at least one or two is needed): Python (commercial experience) AWS services – S3, ECS, AppSync GraphQL or REST APIs Kafka or message queue systems PostgreSQL or NoSQL database experience To apply – click the link or for a faster response, email Barry.Ansell@HarringtonStarr.com More ❯

my client are heavily engrained in the Microsoft ecosystem and its key you have a wealth of experience across the following tooling;- Tech : C# Azure API Design and Development (REST) Event-driven architecture/Microservices at Scale Messaging Architecture (Service Bus) K8s Excellent communication skills across Senior Stakeholders and various levels of software engineer Interview Process: 3 stages. Exploratory call More ❯

work experience 5+ years in web, software, or mobile app development Proficiency in Java and at least one of: JavaScript, .NET, PHP, Node.js, Python, Ruby on Rails Experience with REST and GraphQL APIs and web service consumption Knowledge of QuickBooks is highly desirable Background in small business or consumer finance is a plus This is an urgent vacancy where the More ❯

and support our React Native platform in accordance with the business and technology objectives Tech stack required • JavaScript ES6+ • React • React Native • Integrating first and third party services including REST APIs and analytics • Automated testing including unit and end-to-end • Understanding of the key differences between native platforms • Git and NPM/Yarn to manage your work and dependencies More ❯

Automate . Proficient in Dataverse , SharePoint Online , Microsoft 365 , and Power BI . Experience with custom connectors , Azure Logic Apps , and Azure Functions is a plus. Solid understanding of REST APIs , JSON , and OData . Familiarity with Agile/Scrum methodologies . Excellent problem-solving, communication, and documentation skills. Microsoft certifications (e.g., PL-400 , PL-900 ) are a plus. Preferred More ❯

design, and microservices architecture (This will be tested) Proven record of complex software delivery in the Interest Rates domain Excellent Java 21, Spring Boot, strong practical experience with containers, REST APIs, and WebSockets Strong experience of Agile, SCRUM, and test-driven development processes Strong leadership experience (at least 5 years of leading a team) Contact Ciara Clarke at Harrington Starr More ❯

skills with the ability to diagnose software and configuration issues Proficiency with support tools (e.g. Zendesk, Intercom, Jira, etc.) Familiarity with APIs, log analysis, and web technologies (HTML, JSON, REST, etc.) Clear and professional communication skills (written and verbal) Able to work independently and manage time effectively in a fast-paced environment Desirable: Experience with SQL or scripting for troubleshooting More ❯

to diagnose complex technical issues. Proficiency in scripting languages (e.g., SQL and Python). Experience with performance monitoring and tuning tools. Understanding of integration technologies ( OCI ) and APIs (e.g., REST, SOAP). Experience with ITIL processes and change management. Soft Skills Excellent verbal and written communication skills with the ability to communicate technical issues effectively. Strong interpersonal skills and the More ❯

Tailwind CSS for building scalable and maintainable user interfaces. Proven experience with modern frontend tooling and infrastructure, including Vercel , Clerk , and GitHub Actions . Strong understanding of API integration (REST, GraphQL) and state management patterns. Experience with data visualization libraries (e.g., D3.js, Chart.js) to represent complex model evaluation insights. Familiarity with computer vision concepts and an interest in machine learning More ❯

Job Title: Technical Lead Job Type: Permanent Location: London (3 Days p/w in office) Salary: £85,000-£95,000 + 20% bonus Skills: C#, .NET, REST, SQL Server, React, Azure, Power BI Roc Search are looking for an experienced Technical lead to join a well established Reinsurance sector client in London. The Technical Lead will be responsible for … and outsourced development teams. You will function as a bridge between business stakeholders and the technology teams, ensuring delivery of robust, scalable, and secure technology solutions. Skills: C# React REST SQL Server Azure Power BI Stakeholder Management Insurance experience Docker/Kubernetes This is a high-impact, hands-on leadership role at the cutting edge of technology and business transformation. More ❯

be a fit. 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 in the finance industry (all areas of finance … extensive Comfortable working with legacy systems and large enterprise environments Confident in leading technical conversations across multiple engineering disciplines Experience with CI/CD pipelines and modern deployment practices REST API design This is a great opportunity for an experienced Java Developer to join a prestigious financial player. If you’re someone who thrives in complex environments and enjoys technical More ❯

and maintained effectively Customise and extend tools through scripting (PowerShell, Python, Bash) and object-oriented languages (e.g. Java, Apex, Groovy) Build and maintain automation workflows and custom connectors using REST APIs and scripting interfaces Translate business requests into scalable, secure, and supportable workflows - collaborating across technical and non-technical teams Support onboarding of new tools and vendor platforms, working with … Tableau, or similar Strong scripting ability - ideally across PowerShell, Python, and Bash Working knowledge of relational databases and querying languages (e.g. SQL, SOQL) Hands-on experience integrating systems via REST APIs and building internal tooling to support cross-platform workflows Familiarity with cloud-based application management and SSO integration (e.g. Okta, Azure AD) Comfortable with version control workflows and collaborative More ❯

building adaptive, intelligent systems that live at the intersection of web, desktop, and edge environments. What You’ll Do: Architecting microservice-based systems and integrating with external services via REST, MQTT, gRPC , and other protocols. Developing hybrid web-desktop applications with clean, functional UIs using Electron, Tauri, or Wails . Designing context-aware adaptive systems capable of responding intelligently to … Stack Engineer or Software Architect experience. Strong knowledge of Python, Go, or Java (Backend/API); confident JS/TypeScript skills (Frontend). Extensive practical experience with integration protocols (REST, gRPC, MQTT, WebSockets). Solid database skills (PostgreSQL, SQLite). Proficiency with containerisation technologies. Experience building simple desktop applications using Wails, Electron, or Tauri. Familiarity with edge/fog computing More ❯

efficient, and well-documented code using Apex, JavaScript, and Lightning Components. Maintain and expand Salesforce configuration including user and security model, custom fields, objects, and automation. Develop and consume REST APIs to facilitate integration with external platforms. Ensure high test coverage and performance by writing unit and integration test cases. Troubleshoot and resolve technical issues with a focus on long … Requirements Minimum 7 years’ experience in Java, Apex, SOQL, and Lightning Components (including JavaScript). Minimum 7 years’ experience with Salesforce administration and configuration. Proven experience developing and consuming REST APIs. Background in Financial Services, FinTech, or similar industry. Strong understanding of the full SDLC, including QA, UAT, and deployment. Exceptional communication skills and ability to work with both technical More ❯

Own your work—you’ll have autonomy and trust What we’re looking for: 4+ years’ experience Extensive experience working with Python and frameworks Solid with SQL/NoSQL, REST APIs, and DevOps basics Clear communicator, self-starter Very nice to have: LLMs or voice tech experience Real-time systems knowledge AWS, security, or compliance know-how More ❯

using large datasets. Responsibilities: Building web applications as part of a new financial data product. Provide high-performance data solutions Solving complex problems surrounding scalability and data. Integrating complex REST APIs Required skills: Strong React and TypeScript for building web applications Experience with large data sets Capital markets experience (beneficial) STEM degree from top university Python for API development (nice More ❯

years and are looking for someone who can join in the process of growing their brand. Essential skills: · Fullstack JavaScript and Node.js development experience. · Hands on experience of developing REST web services and API's. · Knowledge and experience of deploying to cloud services, preferably AWS. · Experience building a web application from scratch. · Ideally looking for Backend focused Engineers who are More ❯

have some experience of coaching or mentoring teams in the past. Essential skills for a Senior Fullstack Engineer: Fullstack JavaScript and Node.js development experience. Hands on experience of developing REST web services and API's. Knowledge and experience of deploying to cloud services, preferably AWS. Experience of Unit testing, TDD, BDD and Test Automation. Experince of working with GraphQL. If More ❯

an in-depth understanding of JavaScript and Node.js/React. Essential skills for a Mid-level Fullstack Engineer: Fullstack JavaScript and Node.js development experience. Hands on experience of developing REST web services and API's. Knowledge and experience of deploying to cloud services, preferably AWS. Experience of Unit testing, TDD, BDD and Test Automation. Experince of working with GraphQL. If More ❯

Front End Software Engineer/React UI JavaScript, React, typescript, Redux, NodeJS, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API - Perm Role – London – Hybrid £80'000- £100'000 plus bonus Harrington Starr has partnered up with a Global Exchange company that are looking to hire a UI Developer with expert Software Engineering skills using JavaScript, React/Redux More ❯

design, and tech Help shape technical direction, architecture, and product experience Work in a culture that values collaboration, creativity, and innovation 🧠 Tech Stack Includes : TypeScript, React/SolidJS, Node.js, REST APIs, Cypress, Vercel/AWS 🎯 Bonus Points : Astro, Tailwind, GraphQL, Shopify, Figma, accessibility If you’re a Senior Full Stack Engineer skilled in Node/React & excited by the idea More ❯

plus) Write clean, maintainable, and well-tested code Key Skills & Experience Required: 3–5 years of professional software development experience Proficiency in Node.js. Good understanding of software engineering principles, REST APIs, and asynchronous programming Experience with modern frontend development, ideally with React Nice to Have: Experience with NestJS Cloud experience with AWS services (Lambda, API Gateway, S3, etc.) Exposure to More ❯

Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £120000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer More ❯

Assurance complying with Shell standard tools and framework. Mandatory skills: Python. 7+ years of in QA, 4 in Selenium BDD framework. QA Automation of Web Applications, Web Services and REST APIs. SDLC & Manual testing. Design & execution of test cases for manual & automation. Automation & Quality Engineering Tools/Method, Selenium & Python. BDD & Specflow/Python Behave Optional skills: Using source controllers More ❯

like MITRE ATT&CK, STRIDE, PASTA Over 5 years of cybersecurity experience Expertise in authentication, authorization, logging, encryption, infrastructure security, network segmentation Knowledge of cloud security frameworks Understanding of REST APIs Scripting skills and Infrastructure as Code (Terraform, CloudFormation) Experience with Jira or similar ticketing systems Technical architecture review skills Ability to identify vulnerabilities using CWE or OWASP Knowledge of More ❯