26 to 50 of 431 ECMAScript Jobs in London

are looking for .NET Developer who have experience in .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. You will receive training in all aspects of: .NET 9, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. These .NET Developer positions come with the More ❯

Dynamics 365 applications (Sales & Customer Service) 5+ years server-side development experience preferably using C#/.Net/.Net Core 5+ years front end development experience using HTML, CSS, JavaScript, jQuery, Liquid Template Experience leading teams and mentoring junior team members Experience using REST APIs (building of REST APIs nice to have) Experience in implementing and using other data stores More ❯

track record of successfully building and delivering digital products (web apps and services) to market using agile methodologies. Strong proficiency in C#, .NET, React and Azure. Other development skillsets: JavaScript, HTML/CSS, Azure PaaS (Azure Functions, Azure Logic Apps, Cosmos DB, Azure App Service, Azure Service Bus), ARM/Bicep templates, SharePoint. Demonstrable creative flair, attention to detail, tenacity More ❯

/UX design teams Experience working within regulated, high-availability, or performance-critical environments. Certifications such as AWS Certified Developer, AWS Solutions Architect, Meta Front-End Developer, or Certified JavaScript Developer To apply, please send your CV with a cover letter detailing why you are interested in this role to . More ❯

Robert Half Technology are assisting a market leading global technology consultancy to recruit a Full Stack Developer - Fully remote The Full Stack Developer will have experience across: React Python Javascript Nice to have: CI/CD Pipelines Github Actions Vue Java Azure Azure Devops Role The Full Stack Developer will adopt best practices like writing clean and reusable code using More ❯

We’re Looking For 4+ years overall software engineering experience 2+ years’ recent, hands-on React development experience (coding, testing, debugging, automation) Proven experience building data-rich, user-friendly JavaScript/HTML/CSS applications Exposure to GraphQL (desirable) Experience deploying production applications (Azure, AWS, etc.) Strong understanding of CI/CD principles A problem-solving mindset with excellent troubleshooting More ❯

knowledge-sharing, with opportunities to mentor and get involved in wider tech and cyber skills initiatives Experience required Strong background in software engineering with one or more languages (Java, JavaScript, .Net, Python) Hands-on experience with version control (Git, Mercurial, etc.) and CI/CD tools (Jenkins, Bamboo, TeamCity, Bitbucket) Proven track record delivering in agile environments (Scrum, Kanban, Lean More ❯

knowledge-sharing, with opportunities to mentor and get involved in wider tech and cyber skills initiatives Experience required Strong background in software engineering with one or more languages (Java, JavaScript, .Net, Python) Hands-on experience with version control (Git, Mercurial, etc.) and CI/CD tools (Jenkins, Bamboo, TeamCity, Bitbucket) Proven track record delivering in agile environments (Scrum, Kanban, Lean More ❯

sprint planning, and retrospectives Monitor and troubleshoot production systems; respond to incidents when needed Required Skills & Experience: 3+ years of professional software engineering experience Strong proficiency with Node.js and JavaScript/TypeScript Solid experience building frontend applications with React.js Experience with AWS (at least EC2, Lambda, DynamoDB, CloudWatch) Familiarity with containerization (Docker) and infrastructure-as-code (e.g., Terraform or AWS More ❯

backend systems in a production environment. 3+ years of hands-on experience with modern software architecture and scalable frameworks. Proficiency in Java (Spring Boot), Python, or similar. Proficiency in JavaScript/TypeScript with frameworks like React (preferred), Angular, Vue, or similar. Solid understanding of scalable, service-oriented architectures in a cloud or hybrid setting. Experience with PostgreSQL and/or More ❯

integration with LLMs and hybrid AI systems Participate in architecture discussions, code reviews, and agile ceremonies What We’re Looking For: Strong experience in full-stack development Proficient in JavaScript/TypeScript, Node.js, React Good experience with Go Skilled in Kubernetes, containerisation, cloud infrastructure (AWS or similar) Familiarity with CI/CD, Terraform, and Infrastructure as Code A problem-solver More ❯

a real impact. Key Requirements: 3+ years in software engineering with a strong product mindset Experience working closely with product teams and designing for real users Strong frontend skills (JavaScript/Typescript, React/Angular, HTML) and backend expertise (Node.js, Python) Proven experience in API design and system integration Proficiency with Microsoft Azure and familiarity with databases, IAM, containers, and More ❯

and architecture planning sessions. Required Knowledge, Skills & Experience Proven experience building secure, production-grade front-end applications in regulated environments (e.g., finance, healthcare, government). Strong proficiency in modern JavaScript/TypeScript frameworks (React, Next.js) and responsive UI development. Demonstrated ability to build front-end applications from scratch in greenfield or innovation lab settings. Experience developing interactive UIs, dashboards, chat More ❯

and architecture planning sessions. Required Knowledge, Skills & Experience Proven experience building secure, production-grade front-end applications in regulated environments (e.g., finance, healthcare, government). Strong proficiency in modern JavaScript/TypeScript frameworks (React, Next.js) and responsive UI development. Demonstrated ability to build front-end applications from scratch in greenfield or innovation lab settings. Experience developing interactive UIs, dashboards, chat More ❯

will be a highly experienced MS full-stack .Net software developer. Skills will include Azure, C#, ASP.Net, .Net Core, MVC, SQL Server, SSRS, SSIS, PostgreSQL, Entity Framework, HTML, CSS, JavaScript, JQuery, and either Angular, React, VUE or Node (or similar). The successful candidate will have solid experience in full life cycle application development. You will be well-versed in More ❯

documentation, and training for engineering teams adopting Backstage. Contribute to Backstage open-source ecosystem (where applicable). Profile The Spotify Backstage Developer will have strong experience in TypeScript/JavaScript (React knowledge highly desirable). Experience working with Spotify Backstage (building plugins, extending the framework). Familiarity with cloud environments (AWS, GCP, or Azure). Understanding of CI/CD More ❯

to meet them Excellent problem-solving skills and the ability to independently perform root cause analysis. Must have: Web applications expertise using modern web technologies (e.g. CSS, HTML, HTML5, JavaScript, jQuery). Knowledge in UX design principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. joins, count, group by, indexes More ❯

Computer Science, Engineering, or a related field 5+ years of experience in frontend/UI engineering, with a focus on performance and scale Deep expertise in React, TypeScript, and JavaScript Strong understanding of WebSocket integration, low-latency data streaming, and threading Experience troubleshooting data-heavy UIs and optimising load times Familiarity with tools like Redis, Kafka, and cloud platforms such More ❯

strategic advantage. You'll work alongside a talented team contributing ideas, collaborating with designers and prototyping new features. There's a modern tech stack, you'll be mainly using JavaScript/TypeScript and React but will be able to pick new technologies and skills up on the job. Location/WFH: You'll be joining a friendly and supportive team More ❯

will be a highly experienced MS full-stack .Net software developer. Skills will include Azure, C#, ASP.Net, .Net Core, MVC, SQL Server, SSRS, SSIS, PostgreSQL, Entity Framework, HTML, CSS, JavaScript, JQuery, and either Angular, React, VUE or Node (or similar). The successful candidate will have solid experience in full life cycle application development. You will be well-versed in More ❯

Expertise Core tech stack: Terraform, AWS (preferred), Azure, CI/CD You will also bring experience in: 5+ years experience in platform engineering Programming in one or more languages: JavaScript, Java, .Net, Python Experience mentoring, coaching or managing others in the team Designing and building Proof of Concept and Production systems collaboratively Source control (e.g. Git, Mercurial, Perforce) CI/ More ❯

Expertise Core tech stack: Terraform, AWS (preferred), Azure, CI/CD You will also bring experience in: 5+ years experience in platform engineering Programming in one or more languages: JavaScript, Java, .Net, Python Experience mentoring, coaching or managing others in the team Designing and building Proof of Concept and Production systems collaboratively Source control (e.g. Git, Mercurial, Perforce) CI/ More ❯

Expertise Core tech stack: Terraform, AWS (preferred), Azure, CI/CD You will also bring experience in: 5+ years experience in platform engineering Programming in one or more languages: JavaScript, Java, .Net, Python Experience mentoring, coaching or managing others in the team Designing and building Proof of Concept and Production systems collaboratively Source control (e.g. Git, Mercurial, Perforce) CI/ More ❯

skill that that includes: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. Our client can provide training into: .NET 9, Web API 2, Entity Framework, Microservices, Azure, JavaScript, Angular 19, Bootstrap, Agile and MongoDB. This is an excellent opportunity for a .NET Developer to working within a challenging supportive environment. Top performers can expect to receive their first More ❯

applicants should have knowledge of: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. They will provide training into: .NET 9, Web API 2, Entity Framework, Microservices, Azure, JavaScript, Angular 19, Bootstrap, Agile and MongoDB. All positions come with the following benefits: 15% bonus. 10% pension. Weekly office code competition. 5 days of brain-storming time per month. More ❯