2,101 to 2,125 of 2,749 JavaScript Jobs

Principal JavaScript Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . With millions of … complexity that ordinary web development never touches. What you’ll do Design and optimise a high-performance UI framework used globally in real-time applications. Push the limits of JavaScript, TypeScript, and the browser runtime to handle millions of data points smoothly. Solve deep algorithmic and architectural challenges in rendering, scalability, and memory efficiency. Own features end-to-end: design … code, test, release, and iterate. Contribute to a product used by developers and enterprises worldwide. What you’ll bring Mastery of vanilla JavaScript and TypeScript , with additional exposure to C++, Java, or C# . Strong knowledge of data structures, algorithms, and performance optimisation . Experience with frameworks like React, Angular, or Vue , and a deep understanding of DOM internals and 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 ❯

power a global interactive learning platform. Expect a mix of new feature development, performance optimisation, and experimentation with new ideas. End-to-end development in C#/.NET/JavaScript Collaborate directly with product, design and research teams Build and improve interactive web templates and tools Optimise performance for millions of global users Work remotely as part of a UK … based team that’s expanding steadily Tech Stack C#, .NET (Core and 8), ASP.NET MVC, JavaScript, SQL Server, HTML5, CSS, Azure, Canvas API, WebAudio API What You’ll Need Strong commercial experience in C# and JavaScript Solid understanding of modern web development and best practices A proactive, problem-solving mindset Confident communicator who can collaborate remotely Nice to have: Azure More ❯

power a global interactive learning platform. Expect a mix of new feature development, performance optimisation, and experimentation with new ideas. End-to-end development in C#/.NET/JavaScript Collaborate directly with product, design and research teams Build and improve interactive web templates and tools Optimise performance for millions of global users Work remotely as part of a UK … based team that’s expanding steadily Tech Stack C#, .NET (Core and 8), ASP.NET MVC, JavaScript, SQL Server, HTML5, CSS, Azure, Canvas API, WebAudio API What You’ll Need Strong commercial experience in C# and JavaScript Solid understanding of modern web development and best practices A proactive, problem-solving mindset Confident communicator who can collaborate remotely Nice to have: Azure More ❯

A software service provider is looking to expand their teams across the UK. Our client is currently looking for multiple passionate Fullstack JavaScript Developers with an interest in Cloud technologies to realize their own vision on how development services should be made, this is about bringing unique ideas to the table, not working to a specification. There is no better … time for an ambitious JavaScript Developer to join a company which leads digital transformations for clients by modernizing and integrating their mainstream IT, and by deploying digital solutions at scale to produce better business outcomes. The successful applicant will develop the newest generation of their internal risk modelling system built on Azure using next gen services and a cloud native … architecture for high performance distributed computing. Requirements · Proven hands-on experience within JavaScript and Typescript · Experience within React and Angular · Experience within NodeJs is a plus · Must be based in the UK and have right to work Salary & Package: up to £45,000 per year + variety of other benefits Location: Birmingham 2-3 days per week Role: Permanent Lawrence More ❯

Node.js/JavaScript Developer (Outside IR35) Location: UK Remote (Manchester or London preferred for occasional meetings) Rate: £400 per day (Outside IR35) Duration: 3 months (initial) Start Date: ASAP The Role We're looking for an experienced Node.js/JavaScript Developer to join a 3-month greenfield project , focused on upgrading and modernising an existing system from Perl to Node.js … scalable solution. This role is ideal for a hands-on developer who enjoys solving complex problems and improving legacy systems using modern technology. Key Skills & Experience Strong Node.js and JavaScript development experience Experience working on greenfield or migration projects Good understanding of API development and system integration Exposure to MongoDB (Mongo Atlas desirable) Comfortable working in Linux environments Experience with More ❯

API development & integration Proficient using Latest Visual Studio, Visual Code, Source Control System such as Azure DevOps, Git, SourceTree and develop build and release pipelines Proficient in SharePoint (SPFx), JavaScript framework (React and/or Angular), Power Apps (Canvas App) and Power Automate Proficiency in programming languages such as C#, JavaScript, or PowerShell for customization and integration purposes Azure development More ❯

API development & integration Proficient using Latest Visual Studio, Visual Code, Source Control System such as Azure DevOps, Git, SourceTree and develop build and release pipelines Proficient in SharePoint (SPFx), JavaScript framework (React and/or Angular), Power Apps (Canvas App) and Power Automate Proficiency in programming languages such as C#, JavaScript, or PowerShell for customization and integration purposes Azure development More ❯

API development & integration Proficient using Latest Visual Studio, Visual Code, Source Control System such as Azure DevOps, Git, SourceTree and develop build and release pipelines Proficient in SharePoint (SPFx), JavaScript framework (React and/or Angular), Power Apps (Canvas App) and Power Automate Proficiency in programming languages such as C#, JavaScript, or PowerShell for customization and integration purposes Azure development More ❯

Senior D365 CE Developer Home-based in the UK (no sponsorship can be offered) Must be eligible for SC Clearance Dynamics 365, Power Platform, CE/CRM, Javascript, AI This role is an opportunity join a leading Microsoft Solutions Partner specialising in D365, Digital Transformation, Power Platform, Azure, and AI. They are looking for a Dynamics 365 CE Developer to … with the Power Platform and Azure services. Key Responsibilities Design and develop Dynamics 365 CE solutions across modules (Sales, Customer Service, and Field Service) Develop custom C# plugins and Javascript components to automate business processes and enforce business rules within Dynamics 365 CE. Build low-code plugins and/or PCF controls within Power Apps Integrate Dynamics 365 CE with … s evolving technologies What You’ll Bring 4+ years experience developing in Dynamics 365 CE/CRM Expertise in Power Platform (Power Apps, Power Automate) Experience with C#, .NET, JavaScript, TypeScript, and Azure services Understanding of Dataverse, solution management, and application lifecycle A collaborative mindset, curiosity to explore new technologies, and a passion for innovation More ❯

of front-end website development experience 2+ Years of extensive up-to-date, in-depth knowledge and proven development experience of modern HTML and CSS 2+ Years of current javascript framework experience (e.g. Angular, React, Vue) Experience using Responsive Design techniques and progressive enhancement in a mobile-first approach Knowledge of how to optimize CSS/HTML/Javascript for … of user flows and be able to integrate them into our product. You will be required to work with the backend development team to present specs and coordinate deployment. JavaScript Frameworks (e.g. Angular, React, Vue) CSS SCSS HTML Bootstrap Framework Responsive Website Technology Graphic Design AWS (S3 & EC2) Adobe Photoshop Adobe Indesign Adobe Illustrator Creatively solve complex problems Handle website More ❯

for passionate individuals who are eager to make a difference and contribute to our success. What does the role involve? We are seeking a talented and motivated Mid-Level JavaScript/React.js Developer to join our growing development team. In this role, you will be responsible for building and maintaining modern, scalable front-end applications using JavaScript and React.js. You … processes that don't align with customer-first principles. Skills we would love you to have: Hands on experience in agile teams, developing enterprise-level applications. Strong proficiency in JavaScript and ReactJS, including core concepts like JSX, Virtual DOM, and component lifecycle. Experience with React workflows (e.g. Redux, Flux) and tools like Create React App is desirable. Familiarity with RESTful More ❯

We're looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You'll be instrumental in our transition away from Drupal as we modernise and scale our platform. Tech Stack: At least 4 years commercial experience with JavaScript or TypeScript and Node Exposure of Laravel and/or Python (Django More ❯

We're looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You'll be instrumental in our transition away from Drupal as we modernise and scale our platform. Tech Stack: At least 4 years commercial experience with JavaScript or TypeScript and Node Exposure of Laravel and/or Python (Django More ❯

Front-End Engineer (Javascript/React) 🌍 100% Remote (UK-based) 💰 Up to £55,000 | Full-Time About the Role Our HealthTech client is building a cohesive, high-performing in-house engineering team to power their growing technology suite — from web applications and analytics dashboards to AI-driven tools and internal systems. They’re looking for a Front-End Engineer (React … improve people’s lives. What You’ll Do Collaborate with engineers, designers, and product leads to create beautiful, responsive web applications Build and maintain front-end features using React , JavaScript , and modern frameworks Contribute to UI design, component libraries, and front-end architecture decisions Implement best practices for performance, accessibility, and maintainable code Integrate APIs and work closely with backend … engineers to deliver seamless user experiences Help standardise front-end tools, workflows, and design systems What We’re Looking For Strong proficiency in React , JavaScript (ES6+) , HTML , and CSS Experience building responsive, cross-browser web applications Familiarity with API integration and RESTful services Understanding of version control (Git), CI/CD pipelines, and modern front-end tooling A focus on More ❯

step up into leadership with the freedom to do things properly. What you’ll be doing: Lead on technical design and solution decisions. Stay hands-on with .NET and JavaScript/TypeScript builds. Coach, review and guide engineers to raise the standard. Help drive clean, scalable SaaS platform development. Work closely with product and leadership to shape direction. Tech you … ll be around: .NET and C# JavaScript/TypeScript Azure cloud-native services CI/CD pipelines, IaC Containerised apps ( Why it’s worth it: Autonomy to shape engineering culture Fast track to more senior leadership as the platform scales Hybrid setup: 1–2 days per week in Stockport More ❯

clinicians, scientists, and product teams. Requirements: Degree in Computer Science, Data Science, Engineering, or related field. 3+ years of backend software engineering experience. Proficient in Python and/or JavaScript (Node.js). Experience with CI/CD tools (e.g. GitHub Actions, Azure Pipelines). Familiar with Docker and microservices architecture. Solid understanding of RESTful APIs. Bonus: Experience with AI/… ML tools like Hugging Face, LangChain, or PyTorch. Tech Stack: Python/JavaScript (Node.js) Docker/Kubernetes Azure/GitHub Actions RESTful APIs/Microservices Hugging Face, LangChain, PyTorch Unfortunately, no sponsorship is available at this time. More ❯

clinicians, scientists, and product teams. Requirements: Degree in Computer Science, Data Science, Engineering, or related field. 3+ years of backend software engineering experience. Proficient in Python and/or JavaScript (Node.js). Experience with CI/CD tools (e.g. GitHub Actions, Azure Pipelines). Familiar with Docker and microservices architecture. Solid understanding of RESTful APIs. Bonus: Experience with AI/… ML tools like Hugging Face, LangChain, or PyTorch. Tech Stack: Python/JavaScript (Node.js) Docker/Kubernetes Azure/GitHub Actions RESTful APIs/Microservices Hugging Face, LangChain, PyTorch Unfortunately, no sponsorship is available at this time. More ❯

mentor teammates and help grow their skillsets, fostering a culture of continuous learning and improvement. You will bring over 7 years of software engineering experience with deep expertise in JavaScript, TypeScript, and React. Experience in full stack development using Node.js or Go would be a nice to have alongside a strong understanding of automated testing and quality assurance practices. Bonus … skills include browser optimisation, compiler technology or UX design which will be highly regarded. Skills 7+ years software engineering experience Expert in JavaScript, TypeScript and React Strong understanding of automated testing and QA Ability to translate complex ideas into high-quality, shippable products Mentoring and team leadership skills Collaboration with cross-functional teams (engineers, designers) Focus on delivering impact while More ❯

Software Engineer – NodeJS TypeScript Salary: Up to £100'000– plus bonus NodeJS, React, JavaScript, TypeScript, React Framework, NextJS, Azure, Kubernetes, Docker, Digital Investments. SQL, Harrington Starr has partnered with an innovative Digital Investment & Crypto Currency house that specialise in developing unique software systems for Crypto Trading, Risk Management and Data Systems are now in the market for a NodeJS Software … for Crypto Trading and Risk Management within the organisation. This is a Greenfield project and we are looking for a Hands on Software Engineer where you will utilise the JavaScript ecosystem. This organisation are developing cutting edge web-systems, which are being used globally and are offering the opportunity for you to play a pivotal role within the full software More ❯

Software Engineer – NodeJS TypeScript Salary: Up to £100'000– plus bonus NodeJS, React, JavaScript, TypeScript, React Framework, NextJS, Azure, Kubernetes, Docker, Digital Investments. SQL, Harrington Starr has partnered with an innovative Digital Investment & Crypto Currency house that specialise in developing unique software systems for Crypto Trading, Risk Management and Data Systems are now in the market for a NodeJS Software … for Crypto Trading and Risk Management within the organisation. This is a Greenfield project and we are looking for a Hands on Software Engineer where you will utilise the JavaScript ecosystem. This organisation are developing cutting edge web-systems, which are being used globally and are offering the opportunity for you to play a pivotal role within the full software More ❯

not limited to Computer Science, Computer Engineering, and Electrical Engineering. Understanding of data structures and algorithms. Proficiency in one or more programming languages (e.g., JAVA, C++, Python, JS, HTML, JavaScript, GO) Extensive experience in engineering roles specializing in operating system performance optimization, systems optimization, or related areas. Desirable: Experience in developing mobile application software, Internet software or iOS/Android … operating systems Familiarity with front-end development technologies including but not limited to JavaScript frameworks (e.g., React, Angular, Vue.js), HTML5, and CSS.", HTML5, CSS Knowledge of operating system principles and experience in system architecture, performance, and power consumption optimization. Experience in publishing academic papers in related fields. Experience in publishing papers in international conferences or journals. More ❯

service and excellent user experience. What you’ll be doing Developing and maintaining websites, primarily using WordPress and Drupal Writing clean, standards-compliant code in HTML5, PHP, CSS, and JavaScript Building and testing features to ensure cross-browser and cross-device compatibility Supporting clients and colleagues with technical solutions and troubleshooting Collaborating on digital projects and generating ideas for improvements … Maintaining documentation and following best practice in deployment and version control What we’re looking for Strong skills in PHP, HTML5, CSS3, JavaScript, MySQL, Git Experience working with WordPress and Drupal (or similar CMS platforms) Understanding of full stack development Strong problem-solving skills with the ability to meet deadlines under pressure Excellent communication skills and ability to collaborate across More ❯

service and excellent user experience. What you’ll be doing Developing and maintaining websites, primarily using WordPress and Drupal Writing clean, standards-compliant code in HTML5, PHP, CSS, and JavaScript Building and testing features to ensure cross-browser and cross-device compatibility Supporting clients and colleagues with technical solutions and troubleshooting Collaborating on digital projects and generating ideas for improvements … Maintaining documentation and following best practice in deployment and version control What we’re looking for Strong skills in PHP, HTML5, CSS3, JavaScript, MySQL, Git Experience working with WordPress and Drupal (or similar CMS platforms) Understanding of full stack development Strong problem-solving skills with the ability to meet deadlines under pressure Excellent communication skills and ability to collaborate across More ❯

Test Manager/QA Manager/Quality Assurance/Senior Test Analyst/Tester/Automation/Playwright/Integration/API/CI/CD/Azure/JavaScript/TypeScript/Automation Strategy/Test Plans/Based in Solihull/Birmingham/£50,000 – 70,000 + bonus + benefits. One of our leading clients is looking … Selenium, Cypress). Solid understanding of integration and API testing, regression strategy, and CI/CD integration (Azure DevOps, GitHub Actions). Practical coding experience writing automated tests in JavaScript/TypeScript or Microsoft-aligned languages (.NET/C#). Experience defining QA strategy, test plans, acceptance criteria, and using metrics to measure outcomes. Ability to lead a small team More ❯