1 to 25 of 347 JavaScript Jobs in Central London

architecture, and reduce technical debt, whilst mentoring junior engineers and contributing to a culture of continuous learning and innovation. About you Strong proficiency in JavaScript, TypeScript and React, with a solid grasp of modern ES6+ features and best practices Ability to build accessible user interfaces that comply with accessibility standards More ❯

Collaborate on version control practices using Git, documentation, and code reviews. Desired Skills: Passion for software development and continuous learning. Some frontend experience with JavaScript/TypeScript and frameworks like React.js. Basic backend experience with Python or Node.js. Understanding of databases (relational and NoSQL). Familiarity with cloud platforms (AWS More ❯

Experience Required: Degree in Computer Science, Software Engineering, or related field. 3-5 years professional experience as a Full Stack Developer. Proficiency in PHP, JavaScript, React, NEXT.js, HTML/CSS, responsive UI frameworks. Experience building scalable REST APIs using Python, Java, Golang, PHP, Node.js, etc. Knowledge of web performance tools More ❯

positions, we’d welcome a confidential conversation. We’re especially interested in those with experience in: Software development using C#/.NET , Java , or JavaScript frameworks (such as Angular, React, Node.js) Cloud and DevOps tools (Azure, AWS, CI/CD, containerisation with Docker/Kubernetes) API development , integration, and microservices More ❯

Agile methodologies. Rapidly prototype new ideas while ensuring scalability and robustness for production systems. Technical Skills Programming Languages: Java, Python, C#, C/C++, JavaScript, Ruby Web Technologies: React, Webpack, SCSS, Node.js, AngularJS Protocols: HTTP, TCP/IP, UDP, SMTP, DNS API Development: REST, SOAP, RPC, RMI Architectures: Microservices, Cloud More ❯

bring: Strong front-end development experience, ideally with data-centric applications. Experience in Power BI development Experience in developing applications in one or more Javascript framework, React, Angular etc. A strong understanding of DevOps, CI/CD, and modern software development practices. Solid experience with Python (especially data and machine More ❯

Inside IR35 Mandatory Skills - Required .NET Core 8 experience Angular 16 or later Azure cloud development MS SQL (local & azure) HTML/CSS/JavaScript/Typescript Hands on Coding Job Description: 7+ years of experience with cloud technologies, Azure, AWS, etc. **** 7+ years of hands-on experience in .NET More ❯

on both front-end and back-end technologies. Expertise in C# and .NET Core for server-side development. Strong experience with React and modern JavaScript (ES6+), including state management libraries like Redux or Context API. Proven experience with RESTful API development and integrating third-party services. Solid understanding of SQL More ❯

collaborate with product managers, designers, and senior engineers to understand project goals and deliver high-quality solutions. You’ll work with technologies like Node.js, JavaScript, TypeScript, and React, and play a key role in leveraging AI-powered development tools (such as GitHub Copilot, Cursor, Claude Code, or Gemini) to improve More ❯

software development experience, with at least 3 years in a senior or technical lead role. Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development More ❯

maintaining high-concurrency, low-latency trading systems at scale Advanced proficiency in Rust (or C++ and willing to learn Rust); working knowledge of Node.js (JavaScript/TypeScript) and Python is an advantage Deep experience with data-intensive architectures and real-time data pipelines Proven track record deploying, optimising and operating More ❯

Bachelor’s degree in computer science, Engineering, or a related field, or equivalent work experience. Knowledge of front-end technologies like HTML, CSS, and JavaScript is a plus. More ❯

Senior Software Engineer London, UK - Fully Onsite Key Technologies: Java, JavaScript, React, Docker, Kubernetes Perm Role | £80,000 - £120,000 Harrington Starr has partnered with a leading financial institution on a mission to transform investment banking through cutting-edge technology. Their Investment Banking Middle Office Technology team plays a crucial More ❯

automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency in Node.js (preferred), or .NET/Java. Front End: Solid experience with JavaScript , React , and TypeScript . Strong foundation in Agile/Lean methodologies and modern software delivery practices. Working knowledge of UI/UX principles and prototyping More ❯

API development. Solid understanding of both front-end and back-end development, with the ability to deliver complete end-to-end solutions. Proficiency in JavaScript/TypeScript, HTML/CSS, and React. Experience with cloud platforms – Azure, AWS, or GCP. Strong focus on code quality, performance, and architectural best practices. More ❯

Power BI. Required Skills & Experience Cloud Certification: AWS, Azure, or Google Cloud (with hands-on experience in developing cloud applications). Technical Skills: C#, JavaScript, Node.js SQL & Database Management API Development (RESTful) Version Control (Git) CI/CD Pipelines Testing Frameworks Platform Experience: Power Apps Power Automate Azure Functions Apigee More ❯

mid-level engineers. Required Experience We're keen to speak with candidates who have: Strong hands-on experience in one or more of: Java, JavaScript, .Net, Python . Excellent understanding of CI/CD pipelines (Jenkins, Bamboo, GitLab, etc.). Proficiency with Git or other version control systems. Strong experience More ❯

individual contributor role with no direct line management but significant influence over technical decisions and standards. Key Technical Skills Front-End Development: HTML5, CSS3, JavaScript, TypeScript, React (including Next.js) Back-End Development: .NET Framework, .NET Core, ASP.NET Core, Node.js, C# Database Management: SQL Server, with additional experience in NoSQL databases More ❯

driven microservice architectures on the Kubernetes platform using messaging platforms such as RabbitMQ, Azure Service Bus, Kafka. Familiarity with front-end technologies (HTML, CSS, JavaScript, and frameworks like Angular or React). Proficiency with SQL and NoSQL databases (e.g., SQL Server, PostgreSQL, MongoDB). Experience with cloud platforms such as More ❯

GraphQL APIs for seamless data integration. Performance Optimisation. System Architecture & Scalability. Code Review & Quality Assurance. Security Best Practices. Skills and Experience: Essential: Proficiency in JavaScript/TypeScript, React, Node.js, PostgreSQL, and MongoDB. Experience with Directus or other headless CMS solutions. Strong understanding of RESTful & GraphQL APIs. Proven experience in leading More ❯

Databricks development and deployment. Optimise Databricks workloads for performance and cost. Need to program using the languages such as SQL, Python, R, YAML and JavaScript Data Integration: Integrate data from various sources, including relational databases, APIs, and streaming data sources. Implement data integration patterns and best practices. Work with API More ❯

Degree in Computer Science, IT, or a related field. 5+ years of experience with the Microsoft Power Platform. Strong experience with C#, ASP.NET, MVC, JavaScript, HTML/CSS, T-SQL, and web services. Hands-on experience with SharePoint Online development and SPFx. Proficient in SQL and data modelling principles. Bonus More ❯

grade solutions with Microsoft Power Platform (Power Apps, Automate, BI, Virtual Agents). Proficiency in developing .NET-based solutions, including experience with C#, ASP.NET, JavaScript, HTML, CSS, SQL, and related frameworks. Solid hands-on experience with SharePoint Online development and SPFx. Strong data modelling and analysis background, with working knowledge More ❯

GCP, or Azure), containerisation, and CI/CD pipelines Familiarity with scalable data delivery architectures (e.g., microservices, serverless frameworks) Front-end development skills (React, JavaScript, Streamlit, etc.) Familiarity with geospatial tools and frameworks (Mapbox, Leaflet, CesiumJS, etc.) Familiarity with UX/UI design principles and interactive web-based visualisation  Location More ❯

microservices, and system reliability. Blockchain expertise is a plus (Ethereum, Solana, C2PA). Requirements: 7+ years of full-stack development experience. Proficiency in Python, JavaScript, Typescript (C# preferred). Expertise in secure systems, distributed architectures, databases, and APIs. AWS, containerization, and excellent documentation skills. Tech Stack: TypeScript, Node.js, Python, React More ❯