2,026 to 2,050 of 2,580 JavaScript Jobs in England

Principal JavaScript Performance 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 … 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 ❯

Principal JavaScript Performance 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 … 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 ❯

Principal JavaScript Performance 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 … 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 ❯

Principal JavaScript Performance 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 … 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 ❯

Working Mode: Hybrid (Twice in a week mandatory) Citizenship & Clearance: Need UK citizens only. Candidates need have active SC clearance. Job Description Front End Skill Set: Vue.js, HTML, CSS, JavaScript, Node.js Back End Skill Set: Knowledge of C# and .NET (particularly ASP.NET Core) Experience with HTML, JavaScript and web development frameworks (Vue.js) is preferred Proven experience with software design and More ❯

Senior Python Developer | EdTech | Python, Django, AWS, JavaScript | £90K | London (Hybrid) OB are partnered with a leading EdTech that delivers digital learning solutions for professionals in the financial sector. They’re expanding their engineering team and looking for an experienced Senior Python Developer to join their London office. You’ll play a key part in designing, building, and maintaining the … You’ll collaborate across product and engineering teams to deliver innovative, scalable solutions and help shape the technical direction of their platform. Senior Python Developer | EdTech | Python, Django, AWS, JavaScript | £90K | London (Hybrid) Key Requirements: Strong Python/Django experience. Experience with PostgreSQL, REST APIs and Docker Frontend exposure to HTML, CSS and JavaScript. Key Info: Salary up to £90K … Hybrid work in Central London (3 days on-site) 2 stage Interview Process Senior Python Developer | EdTech | Python, Django, AWS, JavaScript | £90K | London (Hybrid More ❯

Senior Python Developer | EdTech | Python, Django, AWS, JavaScript | £90K | London (Hybrid) OB are partnered with a leading EdTech that delivers digital learning solutions for professionals in the financial sector. They’re expanding their engineering team and looking for an experienced Senior Python Developer to join their London office. You’ll play a key part in designing, building, and maintaining the … You’ll collaborate across product and engineering teams to deliver innovative, scalable solutions and help shape the technical direction of their platform. Senior Python Developer | EdTech | Python, Django, AWS, JavaScript | £90K | London (Hybrid) Key Requirements: Strong Python/Django experience. Experience with PostgreSQL, REST APIs and Docker Frontend exposure to HTML, CSS and JavaScript. Key Info: Salary up to £90K … Hybrid work in Central London (3 days on-site) 2 stage Interview Process Senior Python Developer | EdTech | Python, Django, AWS, JavaScript | £90K | London (Hybrid More ❯

technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity trading environments. Experience in modern JavaScript coding, testing, debugging and automation techniques. Cloud-based More ❯

technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity trading environments. Experience in modern JavaScript coding, testing, debugging and automation techniques. Cloud-based More ❯

technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity trading environments. Experience in modern JavaScript coding, testing, debugging and automation techniques. Cloud-based More ❯

technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity trading environments. Experience in modern JavaScript coding, testing, debugging and automation techniques. Cloud-based More ❯

technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity trading environments. Experience in modern JavaScript coding, testing, debugging and automation techniques. Cloud-based 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 ❯

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 ❯

genuine step up into leadership with the freedom to do things properly. What youll 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 youll … be around: .NET and C# JavaScript/TypeScript Azure cloud-native services CI/CD pipelines, IaC Containerised apps ( Why its worth it: Autonomy to shape engineering culture Fast track to more senior leadership as the platform scales Hybrid setup: 12 days per week in Stockport 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 ❯

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 ❯

Key Responsibilities Design, develop, and configure custom solutions using the Power Platform (Power Apps, Power Automate) and Dynamics 365 CE. Extend the Dynamics 365 platform using C#, .NET, and JavaScript to create custom plugins, workflows, and web resources. Collaborate with business analysts, project managers, and other stakeholders to understand requirements and deliver effective solutions that meet business needs. Manage solution … support, troubleshooting, and bug-fixing for existing Dynamics 365 CE applications. Required Skills & Qualifications Proven experience as a Dynamics CRM/365 CE Developer. Strong proficiency in C#, .NET, JavaScript, and HTML. Hands-on experience with the Power Platform (Power Apps, Power Automate). Experience with solution customisation, configuration, and extension. Excellent problem-solving skills and ability to work independently. More ❯

but 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, HTML, JavaScript, GO) Extensive experience in engineering roles specialising in operating system performance optimisation, systems optimisation, 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. Knowledge of operating system principles and experience in system architecture, performance, and power consumption optimisation. Experience in publishing academic papers in related fields. Experience in publishing papers in international conferences or journals Project People is acting as an More ❯

but 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, HTML, JavaScript, GO) Extensive experience in engineering roles specialising in operating system performance optimisation, systems optimisation, 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. Knowledge of operating system principles and experience in system architecture, performance, and power consumption optimisation. Experience in publishing academic papers in related fields. Experience in publishing papers in international conferences or journals Project People is acting as an 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 ❯

Senior Developer Milton Keynes (hybrid) £40,000 - £60,000 Our client requires a Senior Developer with strong experience in C#, Azure (or similar cloud-based web applications) and JavaScript to join their growing team. You will have the flexibility of hybrid working and spend 3 days a week in their office. You will play a key role in designing, building … technologies and propose innovative solutions Look after complex coding tasks Skills: Proven experience as a Senior Developer or similar role Strong proficiency in C#, .NET, Azure Solid experience with JavaScript and modern front-end frameworks Excellent communication and leadership skills Ability to deliver complex projects to tight deadlines Outstanding attention to detail and with a focus on performance, security and More ❯