351 to 375 of 454 JavaScript Jobs in the City of London

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they’re looking More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they’re looking More ❯

eCommerce technology solutions with Shopify and associated systems (OMS, IMS, WMS, credit card processing, tax engine, digital distribution etc.) § Strong proficiency in modern design patterns and development languages including JavaScript, Typescript, Python, HTML5, CSS3, HTML-CSS-Bootstrap and Ruby § Experienced in NodeJS, JavaScript (ES2019+), ESLint and coding standards, Typescript § Solid grounding with common design patterns and development best practices § Knowledge More ❯

eCommerce technology solutions with Shopify and associated systems (OMS, IMS, WMS, credit card processing, tax engine, digital distribution etc.) § Strong proficiency in modern design patterns and development languages including JavaScript, Typescript, Python, HTML5, CSS3, HTML-CSS-Bootstrap and Ruby § Experienced in NodeJS, JavaScript (ES2019+), ESLint and coding standards, Typescript § Solid grounding with common design patterns and development best practices § Knowledge More ❯

.NET Developer, .NET 9, C# - Global Internet Icon - London (Tech stack: .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client has long been a classic internet icon; today it has evolved into an integrated and diversified modern media company. We are seeking .NET Developer to work on one of … applicants should have a skill set that encompasses: .NET, .NET Core/ASP.NET MVC, C#, Azure SQL. Full training will be provided into: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD, Azure SQL and MongoDB. Our client offers a truly refreshing working environment including: flexible working hours, home working, casual dress code, onsite gym and games More ❯

.NET Developer - .NET 9, C#, Blazor, Azure - London (Tech stack: .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client is a crowd funded social advertising technology platform that sells services to Facebook advertisers to grow their marketing ROI. They were recently named one of 12 Facebook Strategic Preferred Marketing … should have a skill set that includes: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. Full training will be provided into: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD, Azure SQL and MongoDB. This is an amazing opportunity to join a firm that has revolutionized its industry and to work on groundbreaking software development More ❯

.NET Developer, Graduate/Junior - Computer Gaming Company - London (Tech stack: Graduate/Junior .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, Graduate/Junior .NET Developer) Having sold over 100 million games consoles and over 500 million games over the last decade, my client is undoubtedly the world's most recognised … or through a placement year in industry. You will follow the firm's career progression programme and will receive industry recognised training in: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD, Azure SQL and MongoDB. This is a truly amazing opportunity to work for a forward thinking and progressive company, one that can provide you with More ❯

.NET Developer - Europe's Largest Radio Station Group - London (Tech stack: .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client is Europe's largest and most profitable commercial radio group. In order to keep pace with the new digital technologies being developed, they are transforming their stations into interactive … set that encompasses: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. Our client can provide you with industry recognised training in: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD, Azure SQL and MongoDB. This is an exciting opportunity to work on complex enterprise level .NET/C# software development projects. Our client offers a More ❯

.NET Developer (Tech stack: .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Established in 1962 our client is a leading global media company; its commercial arm comprises of some of the largest television channels across the Globe and market leading cinema screen advertising businesses. We are seeking several .NET Developer … SQL. You should have a strong grasp of object orientated (OO) development principles. Our client can provide you with industry recognized training in: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD and MongoDB. You will follow a structured a career development programme with the view to being promoted to the position of Team Leader/Development More ❯

or critical areas. Manage technical roadmaps, resource allocation, and project delivery timelines. Stay current with emerging technologies, especially in AI, data processing, and scalable web architectures. Tech Stack Frontend: JavaScript, React Backend: Node.js, Python Infrastructure: AWS/GCP (experience with modern cloud environments is a plus) AI/ML: Exposure to applied AI, data models, or large language models preferred …/CD pipelines About You 7+ years of professional experience in software engineering, with at least 2 years in a leadership or management role. Strong background in full-stack JavaScript development (React + Node.js). Experience working with or integrating AI/ML systems or APIs. Proven ability to lead high-performing teams in a fast-paced, product-led environment. More ❯

or critical areas. Manage technical roadmaps, resource allocation, and project delivery timelines. Stay current with emerging technologies, especially in AI, data processing, and scalable web architectures. Tech Stack Frontend: JavaScript, React Backend: Node.js, Python Infrastructure: AWS/GCP (experience with modern cloud environments is a plus) AI/ML: Exposure to applied AI, data models, or large language models preferred …/CD pipelines About You 7+ years of professional experience in software engineering, with at least 2 years in a leadership or management role. Strong background in full-stack JavaScript development (React + Node.js). Experience working with or integrating AI/ML systems or APIs. Proven ability to lead high-performing teams in a fast-paced, product-led environment. More ❯

.NET Developer - Global Sports Company - London (Tech stack: .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client is a global sports brand that operates in over 115 countries worldwide. They are the biggest sports company in Europe and the second largest on the planet! Over the past 30 years … .NET Developer that have a strong background in .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. Training will be provided into: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD, Azure SQL and MongoDB. All positions come with the following benefits: 15% bonus Generous pension Private healthcare Training allowance of £9,700 per year Free More ❯

.NET Developer (Tech stack: .NET Developer, .NET 9, C#, Blazor, Azure, JavaScript, HTML5, CSS3, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over the world to attract, engage, and delight customers by delivering inbound experiences that are relevant, helpful, and personalized. Having recently launched in the … applicants should be experienced in: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. You will receive training in all aspects of: .NET 9, Blazor, EF Core, Azure, JavaScript, HTML5, CSS3, Agile, TDD, BDD, Azure SQL and MongoDB. At the centre of our client's culture is freedom and openness which takes a lot of people by surprise. But More ❯

LLM APIs (e.g. GPT, Claude, Gemini) Developing and optimising APIs, embeddings, and backend services for AI systems Writing clean, efficient, and well-documented code in Python and TypeScript/JavaScript Working within cloud environments (AWS, Azure, or GCP) to deploy and scale AI applications Participating in code reviews , technical discussions, and internal R&D projects Collaborating with engineers, product teams … data engineering, or software development Demonstrable experience delivering AI, LLM, or data-driven applications Strong programming skills in Python (e.g. PyTorch, TensorFlow, scikit-learn) and/or TypeScript/JavaScript Familiarity with LLM frameworks (LangChain, LlamaIndex) and vector databases (Pinecone, Weaviate) Understanding of cloud platforms (AWS, Azure, or GCP) and modern development workflows (Git, CI/CD) Excellent problem-solving More ❯

Python Developer - Python, Django, REST API's, AWS, JavaScript OB are partnered with a Global Financial Services company, who are looking to add a highly skilled Python Developer to their team. In this role, you'll be working their Python backend systems, developing new features and collaborating with different teams, to ensure product goals are met. Python Developer - Python, Django … REST API's, AWS, JavaScript Key Skills and Experience: Strong knowledge of Python Experience with Python frameworks (Django preferred) PostgreSQL REST API'S Docker Cloud experience (AWS preferred) Knowledge of Frontend Technologies (JavaScript, HTML, CSS) This is a hybrid role with 2-3 days a week required in a London based office Base salary of £75k-£90k depending on skills … and experience To be considered, you must be UK based Python Developer - Python, Django, REST API's, AWS, JavaScript More ❯

La Fosse has partnered with a global leader in customer loyalty and travel services. We're looking for a Senior Software Engineer with a strong background in full-stack JavaScript (Backend JS leaning) to join their growing team. Your mission: Build greenfield systems from the ground up, with opportunities to explore AI, automation, and industry-leading engineering practices. What They … re Looking For 6+ years of technical experience with the Full Stack JavaScript ecosystem Experience leading the design, development, and operation of innovative software solutions Strong skills in modern web development (Node.js, AWS, TypeScript) and a solid understanding of web architecture Proficiency in building and managing APIs (GraphQL & RESTful) and strong database fundamentals (MongoDB) In-depth knowledge of AWS services More ❯

and will see the business impact of. There's a focus on C# .Net backend and API development although you'll also have elements of front end work with JavaScript and React.js. Location: You'll be based in plush City office on a fulltime basis, Monday to Friday. About you: You have expertise with C# .Net, ASP.Net development You have … a strong knowledge of databases (SQL or Oracle) You're comfortable with JavaScript/React You have a thorough knowledge of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms You are collaborative with excellent communication and stakeholder management skills You are degree educated in Computer Science or similar technical discipline What's in it for you: As More ❯

based tech stack in an agile environment , contributing to a fast-evolving product with real-world impact. Key Responsibilities Design, develop, and maintain scalable web applications using PHP, MySQL, JavaScript, and jQuery Write clean, well-documented code following best practices Collaborate with developers, designers, and stakeholders in Agile sprints Participate in code reviews, sprint planning, and daily standups Debug and … to continuous improvement of tools, processes, and technologies Required Skills & Experience Minimum 3 years’ experience in a software engineering role Strong proficiency in: PHP (Laravel or similar frameworks) MySQL JavaScript & jQuery Linux environments and CLI tools Solid front-end development skills with a focus on UX/UI Experience working in Agile development environments Strong problem-solving and communication skills More ❯

geo-location platform which helps keep people safe wherever they are in the world. Track24 is looking for a skilled and adaptable Lead Engineer, with experience working across the Javascript and PHP stack to help lead the team and deliver new features to our AtlasNXT platform while supporting our legacy systems. You'll work across a variety of projects, contributing … Measuring and report engineering KPIs, identifying areas for continuous improvement Participating in technical support and be part of the on-call rotation Requirements Strong experience as a Full Stack JavaScript/PHP Engineer, as well as experience in a technical leadership role Strong expertise in , React/React Native, and PHP across backend, frontend, and mobile development Proven ability to More ❯

Senior Software Engineer | Hybrid | London | React | Node.js | Typescript | GCP | £90k + Share options La Fosse have partnered with a market leader in audio technology. This role is an opportunity to step into technical leadership and is a hands on engineering More ❯

Orval • Work with SCSS/Sass for styling and Design System components Required Technical Skills • 8+ years of experience with modern frontend development • Strong proficiency in React, TypeScript, and JavaScript (ES6+) • Experience with Vite or similar modern build tools (Webpack, Parcel) • Knowledge of Azure AD authentication and MSAL implementation • Experience with data grid libraries (AG Grid, DevExpress, or similar) • Proficiency More ❯

Orval • Work with SCSS/Sass for styling and Design System components Required Technical Skills • 8+ years of experience with modern frontend development • Strong proficiency in React, TypeScript, and JavaScript (ES6+) • Experience with Vite or similar modern build tools (Webpack, Parcel) • Knowledge of Azure AD authentication and MSAL implementation • Experience with data grid libraries (AG Grid, DevExpress, or similar) • Proficiency More ❯

and effectively. Understand, respond to, and address customer needs and issues with empathy and timeliness. Required Skills: Proficiency in Python or another typed, object-oriented programming language Proficiency in Javascript and React would be highly beneficial Good knowledge of software methodologies, tools, and typical architectural patterns. Experience with trading and risk management solutions is preferred, but not essential. Experience designing More ❯

and effectively. Understand, respond to, and address customer needs and issues with empathy and timeliness. Required Skills: Proficiency in Python or another typed, object-oriented programming language Proficiency in Javascript and React would be highly beneficial Good knowledge of software methodologies, tools, and typical architectural patterns. Experience with trading and risk management solutions is preferred, but not essential. Experience designing More ❯

JavaScript Engineer Salary: Up to £85k Location: 3 days p/week in London (opportunity to work outside the UK for 2 months) JavaScript Engineer - would you like the opportunity to join an early-stage start-up currently seeking a JavaScript Engineer? You will be joining a small technology team who have a passion for innovation, collaboration, and providing the … best service to their customers as well as embracing new ideas, technologies and approaches. As a JavaScript Engineer, you will be joining the organisation at one of the most exciting times. The ideal candidate is motivated by real ownership and self-direction, as well as being part of a journey. Requirements: Fullstack JavaScript and AWS experience. Enjoy the ideal of More ❯