51 to 75 of 276 ECMAScript Jobs in London

Server, Oracle, or equivalent systems. Desirable skills: We would love to hear from you if you also have experience in multi-threaded application development, JavaScript front-end frameworks like React, network programming (TCP/UDP), or distributed version control systems like Git or PlasticSCM. Salary ...

Server, Oracle, or equivalent systems. Desirable skills: We would love to hear from you if you also have experience in multi-threaded application development, JavaScript front-end frameworks like React, network programming (TCP/UDP), or distributed version control systems like Git or PlasticSCM. Salary ...

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 ...

methods, associated best practices, and related tools/frameworks (REST/JSON APIs, Postman). Experience with at least one common front‐end (pure JavaScript, React, Angular, etc.) and back‐end (Java, .NET, Python, Node, etc.) technology. Previous exposure to RFI/RFP. Understanding of end‐to‐end payment flow. ...

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 ...

team, engaging in pair programming, and applying strong architectural principles. This position requires proficiency in multiple programming languages, including Java, Python, Node.js, and JavaScript, alongside a solid understanding of cloud technologies such as AWS, Azure, and GCP. The company promotes modern software engineering practices while offering a dynamic work environment. ...

play a key role in shaping the architecture of a complex, high-impact product. You’ll thrive here if you enjoy: Building with JavaScript/TypeScript and Node.js Owning meaningful technical problems end-to-end Improving large-scale, data-heavy systems Working closely with users and seeing your impact quickly ...

with APIs and backend services Optimise UI performance and quality Contribute to code reviews and frontend best practices Required Skills Strong experience with React JavaScript (ES6+)/TypeScript HTML5, CSS3, responsive design State management (Redux, Context, etc.) REST APIs, Git, basic testing (Jest/Cypress) Nice to Have Next.js, design ...

developers and shaping platform standards What we're looking for Strong hands-on experience with SharePoint SE and SharePoint Online Proven SPFx development TypeScript, JavaScript, React Experience with C#/.NET, SQL Server, and RESTful API integrations Solid on-prem admin background patching, performance tuning, troubleshooting BCS and ECT experience ...

programming with at least one modern language such as C++, C#, Java, Python, Golang, PowerShell, Ruby Preferred Qualifications Experience with Ansible (preferred), PowerShell or JavaScript/TypeScript Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status. ...

highly desirable. Experience with delivering projects using Agile & Scrum - highly desirable. Solid understanding of software development lifecycles. Knowledge of languages such as XML, SQL, JavaScript, Python, .NET and C# - desirable. Excellent benefits on offer A pension scheme of Life assurance of four times your salary The day off to celebrate ...

Maintain clear and detailed documentation of tools, processes, and best practices to support team knowledge and future development. Expertise Proficiency in one of Python, Javascript, Golang or Rust Familiarity with React (or similar frameworks) for creating user-friendly web applications. Expertise in API design, data modeling, and distributed architectures Proficiency ...

architecture. Identify UI/UX and performance bottlenecks and implement improvements. Required Qualifications & Experience Strong TypeScript and React experience (React 16+). Proficient in JavaScript ES6+. Experience with React Testing frameworks like Jest and Enzyme. A keen sense of design and desire to build a better mousetrap. General understanding ...

equivalent, async patterns, Postgres, Redis) LLM integration — building products where AI is in the critical path, not bolted on API design and data modelling JavaScript/TypeScript — comfortable enough to ship frontend features and review frontend PRs Nice to Have Experience with voice agents or real-time audio pipelines Familiarity ...

will require this in addition to your role defining strategy and influencing You’re comfortable working in at least one object oriented programming language (JavaScript/TypeScript, Python, Java, C#, etc) You have hands-on experience with GenAI, (e.g. Playwright with MCP). Experience with AI-assisted coding tools (e.g. ...

architecture and implementation of native Android and/or iOS apps, with experience in the full mobile development life cycle. Profound expertise in JavaScript, TypeScript, and related frameworks and libraries. Familiarity with Git for version control and experience working in agile development environments. Adept problem solver with a history ...

skills : Comfortable building scalable servers, APIs, and databases. Computer science fundamentals : Solid grasp of data structures, algorithms, system design, and performance optimization. TypeScript/JavaScript or equivalent : Production experience with modern backend languages and frameworks. Database and infrastructure knowledge : Experience designing schemas, optimizing queries, and working with modern databases ...

Canvas and Model-Driven Power Apps. Configure and customise Dynamics 365, SharePoint Online, and Power Pages, including the use of plugins, custom workflow assemblies, JavaScript, and extended Azure/Office 365 capabilities. Work with Microsoft Power BI to support reporting and data visualisation requirements. Maintain an awareness of the broader ...

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 ...

skillsets: You have 0-2 years of commercial software development experience You demonstrate strong proficiency in one or more of: Python, C#, Java, or JavaScript You are an excellent problem-solver and communicator Nice to have: Internship experience You have experience working within a start-up or collaborating closely with ...

Solid engineering fundamentals and a problem solving mindset Experience working on backend or backend leaning full stack systems Exposure to frontend technologies such as JavaScript frameworks is beneficial A background in computer science or a related STEM discipline is preferred Curiosity, continuous learning, and the ability to articulate what ...

Power Platform implementations Hands-on capability across Power Apps, Power Automate and Dataverse Solid understanding of Azure integration, APIs and custom extensions (.NET/JavaScript) Experience working in Agile delivery teams with DevOps practices Comfortable operating in a large, regulated or corporate environment Confident communicator able to translate complex technical ...

business scales toward Series A and beyond. Core requirements: 3 plus years of engineering experience Strong in React and comfortable across the full JavaScript and TypeScript stack Backend experience building REST APIs using NestJS or Express Or Python Experience with MongoDB or similar databases Evidence of building independently, for example ...

escalations, and help the wider team remain accountable to delivery dates. Ideal Experience: Shopify/Liquid Shopify APIs (Cart, Section Rendering, Storefront & Admin API) Javascript/Web Components Tailwind (or familiarity with CSS frameworks) HTML (with best practices and accessibility in mind) Webpack/Vite REST/GraphQL APIs Shopify ...