1 to 25 of 107 Permanent JavaScript Jobs in Central London

innovation: pilot emerging technologies (AI, automation, data services) that improve efficiency and insight. Tech Stack seeking: Full Stack Developer; Design and Build with C#, JavaScript Library (React.js bonus), API Development, SQL Server/Backend Development including ETL/Integration Azure DevOps (Repos, Pipelines, Boards, Artifacts, Test Plans), CI/ ...

application development (.NET Core, C#) or winforms/WPF (C#) development. Our client will provide you with training into: .NET 10.0, WPF, MVVM, Prism, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and Azure SQL. ...

such as Sitecore, Optimizely, Umbraco, Alterian, Immediacy, Ektron, Kentico, Sitefinity or dotnetnuke. Our client can provide you with industry recognised training in: .NET 10.0, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. This ...

operations integrations Data pipelines AI-powered workflows MVPs for new products Tools that reduce headcount pressure through automation Tech Stack (Flexible – but ideally) JavaScript/TypeScript React/Next.js Node.js Python (bonus) API integrations SQL/NoSQL databases Cloud (AWS/GCP/Azure) Automation tools (Zapier, Make, etc. ...

. Experience integrating blockchain with web apps (wallets, APIs, indexing services). Strong understanding of security, scalability, and distributed systems. Technical Competencies TypeScript/JavaScript, REST/GraphQL APIs CI/CD pipelines and DevOps tooling Cloud security, identity, and access management Blockchain tooling (Hardhat, Foundry, Web3.js/Ethers.js ...

Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Desirable experience includes: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Terraform and DevOps practices Experience in building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing team! This ...

application development. Use Node.js and related tools for effective backend development. Design and implement effective UIs with a focus on user experience, using TypeScript, JavaScript, and CSS. Integrate frontend and backend aspects of the application using RESTful APIs. Participate in continuous integration and deployment (CI/CD) pipelines. Ensure software ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Commodities Brokerage and they are looking for a Senior C#, .NET Software Engineer to join their growing front office team ...

person onshore/offshore engineering team • Architect and enhance scalable, secure cloud-native systems • Contribute directly to full-stack development across TypeScript, JavaScript and React • Improve delivery standards across CI/CD pipelines, DevOps practices and automated testing • Collaborate with the CEO and Product function to align technical delivery with ...

experience building production-grade frontend applications using modern frameworks such as React, Vue, or similar (React preferred). Strong proficiency in TypeScript and modern JavaScript (ES6+) . Experience designing and maintaining scalable frontend architectures in complex applications. Solid understanding of state management, component architecture, and performance optimisation techniques. Experience integrating ...

/GCP) with production engineering rigor: microservices, containers (Docker/K8s), serverless, CI/CD Solid programming skills (one or more): Python, TypeScript/JavaScript, Java, C# Experience with APIs and integration patterns: REST/gRPC, event-driven systems, queues, workflow engines Security & Governance (Must Have) Understanding of GenAI-specific ...

development tools and APIs Experience with Power Platform technologies (Power Apps and Power Automate) Strong understanding of REST API integration Experience working with JavaScript or TypeScript and modern web development practices Understanding of secure development and enterprise collaboration environments Desirable Experience Experience with C# and .NET-based services Experience integrating ...

platform that connects both traditional and on‐chain financial services Must‐have experience: Strong backend engineering background with deep coding experience Professional experience with JavaScript/TypeScript (Node.js) and/or Golang Solid understanding of microservices, event‐driven systems & distributed architecture Strong knowledge of PostgreSQL and/or Redis Understanding ...

resilient systems Excellent communication skills - able to engage directly with business users Comfortable working autonomously and taking ownership & initiative Desirable: Angular or another modern JavaScript framework Financial services exposure (though strong engineers from other sectors are welcomed) Experience within Agile/Jira environments (pragmatic delivery mindset essential) This ...

solving skills Experience collaborating with technical stakeholders such as researchers or data scientists Desirable Experience Experience with languages such as C++, C#, Rust, or JavaScript Experience building microservices or distributed systems Linux experience including debugging services and working with system logs Exposure to trading systems, market data, or systematic trading ...

deployment and monitoring. What We’re Looking For Strong production experience with React , TypeScript and Next.js . Excellent skills in HTML5 , CSS3 , and modern JavaScript (ES6+). Proven experience with state‐management libraries (e.g., Redux, Zustand). Solid experience integrating front‐end apps with RESTful APIs, (GraphQL is a bonus ...

developing front-end applications using React . Ideally an understanding of React Native (even with personal projects) Proficiency in front-end fundamentals: HTML5, CSS3, JavaScript (ES6+). Experience working with relational databases (e.g., MySQL, PostgreSQL) and writing complex SQL queries. Proficient with version control systems, particularly Git. Experience building ...

candidates usually fall down on their lack of skills with LogicApps this is essential Good, hardened Full Stack Development skills within C#, .NET, React, JavaScript, HTML/CSS, Azure PaaS (Azure Functions, Azure Logic Apps, Cosmos DB, Azure App Service, ARM/Bicep templates), SharePoint Acceptance that Development ...

least a BSc level or higher in Computer Science or Mathematics from a Russell Group University or equivalent. Desirable skills: HTML5, CSS, JavaScript Multi-threaded application development Understanding of Windows technologies If you feel you have the skills and experience required for this opportunity, please contact Oliver Wilson on (phone ...

clean, modular, and maintainable code following best practices. Requirements: 3+ years of experience in developing applications using Node.js and backend technologies. Strong proficiency in JavaScript/TypeScript and backend frameworks like Express.js . Familiarity with designing and working with RESTful APIs and microservices architecture. Experience with database technologies like MongoDB ...

engineering and modern testing practices Strong automation background with Playwright, Cypress, or similar Hands-on experience in Continuous Delivery environments Familiarity with JavaScript/TypeScript + Python Understanding of microservices and API-heavy systems Ability to design meaningful test cases grounded in real user behaviour Collaborative mindset + strong communication ...

evolving well-structured RESTful APIs Designing and improving data models across relational (e.g. PostgreSQL) and NoSQL databases Working across the stack where needed, including JavaScript, modern HTML/CSS, and utility frameworks such as Tailwind Contributing to cloud-based infrastructure (e.g. Google Cloud), deployment pipelines and DevOps practices Debugging live ...

strong eye for frontend quality - you care about how things look and feel, not just whether they work Comfortable working with HTML, CSS, and JavaScript across a modern Rails frontend stack Familiarity with relational databases (PostgreSQL preferred) and writing efficient queries Comfortable building and consuming APIs as part of delivering ...

implement well-tested new product features. This role isn't just about coding, its about influencing product and business impact Desired Skills & Experience Fullstack JavaScript/TypeScript/Node.js software engineering experience SASS, DynamoDB, AWS Lambda, and Serverless Framework are all beneficial eCommerce/Shopify experience is a bonus ...