126 to 150 of 396 JavaScript Jobs in the City of London

who thrives in fast-paced, high-growth environments. What You’ll Bring 5+ years of front-end development experience building large-scale web applications. Expertise in React, TypeScript/JavaScript, HTML, and CSS . A strong appreciation for UI/UX design and a passion for delivering exceptional user experiences. Understanding of Design Patterns and SOLID principles . Experience building More ❯

A STEM degree (or equivalent qualification) Evidence of your passion for technology — whether through personal projects, internships, open-source contributions, or hackathons Familiarity with at least one programming language (JavaScript, TypeScript, Python, etc.) Willingness to learn React, TypeScript, Next.js, Tailwind CSS, and AWS A collaborative mindset and eagerness to be part of a growing team Why Join? Work with a More ❯

successful company! Successful .NET Architect candidates should be able to demonstrate strong knowledge of: .NET 9/.NET Core/ASP.NET MVC, Web API 2, Entity Framework, Microservices, Azure, JavaScript, Angular 19, Bootstrap, Agile and Azure SQL. Training will be provided in any of the technologies you lack, allowing you to turn your technological weaknesses into your greatest strengths! The More ❯

infrastructure-as-code tools such as Terraform or CloudFormation. Proficient with CI/CD and development tools such as Jenkins, Git, and Docker. Advanced scripting skills in TypeScript or JavaScript (TypeScript preferred). Experience with other languages such as Go is also welcome. Excellent problem-solving and troubleshooting skills. Strong communication and collaboration abilities, working effectively in Agile teams. Knowledge More ❯

based and attribute-based access controls - Cryptographic protocols and secure key lifecycle management - Securing microservices, APIs, and DevSecOps best practices Skilled in penetration testing and hands-on coding with JavaScript, Java, or Python Strong understanding of vulnerability scanning, remediation, and vendor management Collaborative mindset with the ability to partner across engineering, security, and product teams Desirable Skills: Hands-on configuration More ❯

the following would be beneficial: Understanding of authentication, authorization and endpoint security Exposure to CEP Engines (Esper) or other live stream aggregation technologies Exposure to C#/HTML/JavaScript Exposure to AWS/Terraform, CI/CD pipelines CMC Markets is an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of gender, sexual More ❯

the following would be beneficial: Understanding of authentication, authorization and endpoint security Exposure to CEP Engines (Esper) or other live stream aggregation technologies Exposure to C#/HTML/JavaScript Exposure to AWS/Terraform, CI/CD pipelines CMC Markets is an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of gender, sexual More ❯

. Write clean, maintainable code and contribute to internal documentation. Support ongoing improvements to developer experience and internal tooling. 👀Who You Are: Must-haves: Proficiency in React and modern JavaScript/TypeScript. Experience with React-Admin and Material UI (MUI). Solid understanding of Prisma and relational databases like PostgreSQL. Familiarity with internal tool development and business-focused UIs. Comfort More ❯

related field. Brings expertise in enterprise architecture, data governance, and cybersecurity. Lives and breathes modern platforms and practices, think AWS/Azure, DevOps, Terraform, Git. Background coding in HTML, JavaScript, and SQL when needed, but also thinks big picture. Has experience leading teams, managing risk, and delivering under pressure. Knows how to build partnerships, negotiate contracts, and navigate complex stakeholders. More ❯

related field. Brings expertise in enterprise architecture, data governance, and cybersecurity. Lives and breathes modern platforms and practices, think AWS/Azure, DevOps, Terraform, Git. Background coding in HTML, JavaScript, and SQL when needed, but also thinks big picture. Has experience leading teams, managing risk, and delivering under pressure. Knows how to build partnerships, negotiate contracts, and navigate complex stakeholders. More ❯

complex coding and system design problems. You have deep knowledge in at least one popular coding language for building web-based applications on both FE and BE, ideally Typescript, Javascript/NodeJS, etc. You have experience with common software and system design patterns and infrastructure including APIs, cloud infrastructure tools, storage solutions, data structures etc. Ideally you have experience working More ❯

complex coding and system design problems. You have deep knowledge in at least one popular coding language for building web-based applications on both FE and BE, ideally Typescript, Javascript/NodeJS, etc. You have experience with common software and system design patterns and infrastructure including APIs, cloud infrastructure tools, storage solutions, data structures etc. Ideally you have experience working More ❯

progress, then we're the place you'll thrive Regular Mario Kart action! To be successful, you will... Have experience with React/NodeJS Have expertise in Typescript/JavaScript, with proven experience in development role(s) Have exceptional problem-solving abilities, proven in diagnosing and fixing complex technical issues Have excellent communication skills, able to foster strong customer relationships More ❯

progress, then we're the place you'll thrive Regular Mario Kart action! To be successful, you will... Have experience with React/NodeJS Have expertise in Typescript/JavaScript, with proven experience in development role(s) Have exceptional problem-solving abilities, proven in diagnosing and fixing complex technical issues Have excellent communication skills, able to foster strong customer relationships More ❯

code quality and best practices, actively contributing to code reviews and collaborative programming sessions with your team. As a Senior Software Engineer, you will be experienced with: C#, .Netcore JavaScript, React.js AWS Key information: Up to £475 per day Outside IR35 9 months rolling Hybrid Monthly (London) This is an exciting opportunity for a Senior Software Engineer to join a More ❯

solutions that drive real value. What you’ll bring: ✅ Proven experience developing with SharePoint Online and the Power Platform ✅ Knowledge of SPFx, REST APIs, and Microsoft Graph ✅ Skills in JavaScript, TypeScript, HTML, CSS, and PowerShell ✅ Strong problem-solving and stakeholder communication abilities 🎯 Microsoft certifications are a plus If you’re excited by the opportunity to lead innovation in Microsoft More ❯

a technical consultant with Agile experience (Scrum Master certification beneficial) Extensive AWS experience (5+ years) with certification Familiarity with Infrastructure as Code (IaC) tools Proficient scripting skills (Python, Java, JavaScript, Go) Experience with CI/CD pipelines (Jenkins, GitLab, GitHub, Concourse) Strong communication, presentation, and client engagement skills Ability to think strategically and solve client problems in ambiguous environments Responsibilities More ❯

a technical consultant with Agile experience (Scrum Master certification beneficial) Extensive AWS experience (5+ years) with certification Familiarity with Infrastructure as Code (IaC) tools Proficient scripting skills (Python, Java, JavaScript, Go) Experience with CI/CD pipelines (Jenkins, GitLab, GitHub, Concourse) Strong communication, presentation, and client engagement skills Ability to think strategically and solve client problems in ambiguous environments Responsibilities More ❯

deployment. The company has grown significantly in the last few 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 More ❯

Requirements 3–4 years of front-end testing experience, preferably in finance or trading systems Hands-on experience with Playwright and TypeScript Strong understanding of web technologies (HTML, CSS, JavaScript) Excellent analytical, problem-solving, and communication skills Experience in Agile/Lean development environments is a plus This is an excellent opportunity to work with cutting-edge trading technology in More ❯

Requirements 3–4 years of front-end testing experience, preferably in finance or trading systems Hands-on experience with Playwright and TypeScript Strong understanding of web technologies (HTML, CSS, JavaScript) Excellent analytical, problem-solving, and communication skills Experience in Agile/Lean development environments is a plus This is an excellent opportunity to work with cutting-edge trading technology in More ❯

Developer will enjoy hybrid working on a 3+2 basis. The Lead Developer will write efficient and scalable code. The Lead Developer will be experienced with PHP (Laravel/Lumen), Javascript and Typescript. The Lead Developer will be familiar with React and Python. The Lead Developer will enjoy interrogating databases (MySQL). The Lead Developer will ensure robust AWS integrations and More ❯

Developer will enjoy hybrid working on a 3+2 basis. The Lead Developer will write efficient and scalable code. The Lead Developer will be experienced with PHP (Laravel/Lumen), Javascript and Typescript. The Lead Developer will be familiar with React and Python. The Lead Developer will enjoy interrogating databases (MySQL). The Lead Developer will ensure robust AWS integrations and More ❯

pivotal role in influencing the product’s direction and long-term success. What You Bring Deep understanding of modern web applications and scalable architecture. Hands-on experience with Python, JavaScript/TypeScript, and cloud (AWS/GCP). Strong focus on code quality, testing, and observability. A passion for learning, problem-solving, and building products that make a difference. Why More ❯

leading product development and architecting solutions. Demonstrated expertise in scaling and managing production systems. Provides comprehensive technical development support, both broad and detailed. Highly proficient in: Python, Java, Spring, JavaScript, Vue, Elasticsearch, PostgreSQL, cloud computing (AWS, Azure), Terraform, ML, GitHub Actions, Jenkins, and Linux. Responsibilities: Own the technical roadmap , aligning it with the product strategy to achieve key business objectives. More ❯