251 to 275 of 284 JavaScript Jobs in Central London

ownership of and will see the business impact of. There's a focus on 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 ❯

Designing and refining complex front-end architectures for real-time data visualization Working in a culture where engineering excellence and code quality are non-negotiable Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) What They’re Looking For … Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performance tuning, and scalable component design Experience in fast-paced environments (finance, trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship Why Join? Collaborate with some of the sharpest minds in trading and technology Contribute to software that drives real More ❯

WordPress/PHP Developer £60,000 - £70,000 Hybrid - 3 days a week, central London (WordPress, PHP, JavaScript,) Would you like the opportunity to work with one of the leading worldwide SaaS organisation, working with WordPress, PHP and JavaScript? The Company A market leading SaaS company with a global presence, with high-end offices in central London You will be … work in the office three times a week with the rest of the team. Requirements: Strong WordPress/PHP experience - any framework (Symfony, Laravel, Zend, etc) Strong knowledge of JavaScript - (React, Vue.JS, Angular, etc) HTML/CSS Understanding of TDD and Gutenberg would be a bonus Experience of working in an agile environment This role requires you to work from … WordPress/PHP developer, this is a unique opportunity to join a market leading company with the added bonus of continuing to grow your skillset in PHP, WordPress and JavaScript, with an outstanding benefits package on offer. More ❯

PHP Developer £60,000 - £70,000 Hybrid - 3 days a week, central London (WordPress, PHP, JavaScript,) Would you like the opportunity to work with one of the leading worldwide SaaS organisation, working with WordPress, PHP and JavaScript? The Company A market leading SaaS company with a global presence, with high-end offices in central London You will be joining an … a week with the rest of the team. Requirements: Strong PHP experience - any framework (Symfony, Laravel, Zend, etc) Have experience/interest in working with WordPress Strong knowledge of JavaScript - (React, Vue.JS, Angular, etc) HTML/CSS Understanding of TDD and Gutenberg would be a bonus Experience of working in an agile environment This role requires you to work from … As a PHP developer, this is a unique opportunity to join a market leading company with the added bonus of continuing to grow your skillset in PHP, WordPress and JavaScript, with an outstanding benefits package on offer. More ❯

Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior UI Trading Software Developer … high profile role for a Multi Asset Trading Team within a Front Office environment. As the Senior Trading UI Developer, you will have extensive experience of working with the JavaScript Framework including ES7 and HTML and CSS. You will be working directly with Portfolio Managers, Sales Traders and Quants and end users where you will be responsible for specing out … designing and developing of UI screens for the users. This will require you to have client facing experience as well as low levy programming with JavaScript and React Development experience. Their systems cover all asset classes from FX, Fixed Income, Interest Rates and Commodities including derivative products although this knowledge is not essential but would be advantageous. The application is More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

someone who has: 2-3+ years of experience working in a web development agency or in-house for a brand Experience developing Shopify themes Strong knowledge of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong More ❯

base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a … broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and either current or previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer … Engineering to prevent repeat issues. Build automation to streamline debugging, triage, and regression prevention. Improve system performance, reliability, and developer experience. What You’ll Bring Strong experience with modern JavaScript frameworks , a good understanding of Ruby on Rails code working with SaaS applications. Skilled with SQL databases at scale and comfortable in Linux environments . Proven ability to diagnose and More ❯

paced project environment. You’ll work closely with a cross-functional team to deliver high-quality, scalable web applications using modern technologies. Key skills: Essential: Strong commercial experience with JavaScript , React , and Node.js Proven ability with TypeScript and modern front-end development practices Experience integrating APIs and building performant, responsive interfaces Familiarity with modern tooling and CI/CD pipelines … month initial contract with potential for extension Up to £550 per day, Outside IR35 Hybrid working: 2 days onsite in London If you have strong commercial experience in JavaScript, React, and Node, and are available for your next contract, we’d love to hear from you. More ❯

keep up-to-date with new Salesforce features and best practices. Required Skills: Salesforce Developer with 4+ years of experience, specializing in Cloud and LWC. Skilled in Apex, HTML, JavaScript (ES6+), CSS, SLDS, and Salesforce DX. Experienced in building accessible, WCAG 2.2-compliant portals, integrating via REST/SOAP APIs, and using declarative tools like Flows and Process Builder. Strong … problem-solving and communication skills. Holds key Salesforce certifications including JavaScript Developer I, Platform Developer I & II, and App Builder. All profiles will be reviewed against the required skills and experience. Due to the high number of applications we will only be able to respond to successful applicants in the first instance. We thank you for your interest and the More ❯

Graduate Software Engineer - JavaScript/React/Node | £40–50K | Camden (Hybrid) Join a VC-backed AI SaaS startup that's helping chemical and cosmetics companies launch products globally - solving complex regulatory problems through software. They've raised £3M seed, hit £500K+ in revenue, and are building an all-star team of devs from top UK universities. You’ll work … you: Have a 1st class degree from Imperial, UCL, Cambridge, Oxford, Durham, Bath, etc. Have a passion for building (show us your GitHub or side projects!) Are confident with JavaScript, React, Next.js, Tailwind, Node.js Care about clean code, thoughtful UX, and solving problems end to end Are London-based and up for 3 days/week in our Camden office More ❯

global customer base and extremely innovative product suite are in need of an experienced Software Support Engineer. This will be a hugely impactful role, working with Ruby on rails & JavaScript software applications, AWS cloud environments and Linux-based systems. You will be working with an exciting SaaS platform as part of a talented team of Software Engineers & Architects. NearTech have … across our entire system — backend, frontend, and infrastructure — to fix friction points, enhance usability, and make our platform bulletproof. If you’re a full-stack engineer (Ruby on Rails, JavaScript, AWS) who enjoys solving complex issues, improving processes, and making large systems feel effortless to users, you’ll thrive here. What You’ll Do Own product stability end-to-end … repeat issues. Build automation to streamline debugging, triage, and regression prevention. Improve system performance, reliability, and developer experience. What You’ll Bring Strong experience with Ruby on Rails , modern JavaScript , and AWS . Skilled with SQL databases at scale and comfortable in Linux environments . Proven ability to diagnose and fix complex production issues in large systems. A product mindset More ❯

developer resources such as APIs, SDKs, and technical documentation. Strong experience across Integrations, Full Stack Web Development, and Cloud Architecture Proficiency with one or more of the following technologies: JavaScript, NodeJS, Python (or equivalent modern frameworks/languages). Outstanding interpersonal and communication skills, with the ability to convey technical concepts clearly to a range of audiences. Highly organised with …/Technical Integration Lead/API Integration Manager/SaaS Integration Engineer/Full Stack Developer/Solutions Architect/Cloud Engineer/Platform Integrations Lead/NodeJS/JavaScript/Python/API/Cloud Architecture/Swagger/Computer Science/Software Engineering/Integration Architect/API Solutions Lead/Technical Project Manager/SaaS Platform Engineer More ❯

developer resources such as APIs, SDKs, and technical documentation. Strong experience across Integrations, Full Stack Web Development, and Cloud Architecture. Proficiency with one or more of the following technologies: JavaScript, NodeJS, Python (or equivalent modern frameworks/languages). Outstanding interpersonal and communication skills, with the ability to convey technical concepts clearly to a range of audiences. Highly organised with …/Technical Integration Lead/API Integration Manager/SaaS Integration Engineer/Full Stack Developer/Solutions Architect/Cloud Engineer/Platform Integrations Lead/NodeJS/JavaScript/Python/API/Cloud Architecture/Swagger/Computer Science/Software Engineering/Integration Architect/API Solutions Lead/Technical Project Manager/SaaS Platform Engineer More ❯

Company Profile nLighten is a European platform of distributed edge data centers, designed to meet the growing demand for AI, 5G, and hybrid cloud deployments. As a rapidly expanding provider, we offer scalable colocation hubs and best-in-class energy More ❯

QA Engineer 🧑💻 | C# | JavaScript | Playwright | FinTech | £95,000💷 My client is seeking a QA Engineer to work across the front, middle and back office. This role is seeking candidates who have exposure to the below skill set and come from a financial background. Location - London📍 Salary - £95,000 💷 Hybrid Working - 3 days per week onsite 🏢 Strong proficiency in C# and More ❯

and are looking to scale out their engineering team. Role And Responsibilities You will be joining a forward thinking and collaborative team in developing online platforms using Typescript, NodeJS, Javascript and React. Job Requirements 6+ years commercial development experience Strong Typescript and Javascript skills Good communication skills More ❯

business stakeholders to align technology decisions with strategic goals. Experience: 3–6 years of hands-on coding experience with a strong foundation in software development and system architecture (PHP, JavaScript, WordPress). Proven experience leading technical teams or having transitioned into a managerial or strategic role. Skilled in WordPress platform/hosting, HTML, CSS, JavaScript, PHP, Vue, and MySQL. Experience More ❯

Frontend Software Developer London (Remote) | £30,000–£45,000 + shares & bonus Tech: JavaScript, React, TypeScript, Next.js, HTML, CSS We’re partnered with a leading SaaS company in the HR technology space, looking for a junior to mid-level frontend developer to join their growing team. You’ll work on modern, responsive web applications, using React and the latest frontend … user experiences Write clean, maintainable React code and contribute to continuous improvement What we’re looking for: Some commercial frontend experience, ideally with React and TypeScript Solid knowledge of JavaScript, HTML5, and CSS3 Benefits: Remote working Share options and performance bonuses More ❯

Frontend Software Developer London (Remote) | 30,00045,000 + shares & bonus Tech: JavaScript, React, TypeScript, Next.js, HTML, CSS Were partnered with a leading SaaS company in the HR technology space, looking for a junior to mid-level frontend developer to join their growing team. Youll work on modern, responsive web applications, using React and the latest frontend technologies to turn … seamless user experiences Write clean, maintainable React code and contribute to continuous improvement What were looking for: Some commercial frontend experience, ideally with React and TypeScript Solid knowledge of JavaScript, HTML5, and CSS3 Benefits: Remote working Share options and performance bonuses More ❯

client of Opus, who is a profitable, investment-backed SaaS company with serious growth plans! We’re hiring Backend-focused Ruby Developers or Full Stack Ruby Developers with modern JavaScript experience (React, Vue, etc.) to join their tech team in London. This is a rare opportunity to be part of a company that’s not only profitable but also growing … days/week in their London office (flexible based on team needs). What You’ll Bring: Strong experience with Ruby (Rails or other frameworks). Exposure to modern JavaScript (React, Vue, or similar). Passion for clean code, scalable systems, and collaborative development. Mentoring junior and mid-level developers More ❯

tools, delivering actionable insights, and driving data-informed decisions. Experience with Adobe Web SDK and Customer Journey Analytics is highly desirable. Key responsibilities include managing tag implementations. Proficiency in JavaScript, familiarity with SDLC, and comfort with agile sprint teams are essential. Responsibilities: Tag Management: Implement and maintain internal and third-party tags for data capture across digital assets. Quality Assurance … changes. Data Governance: Establish practices for data privacy, compliance, and security. Skills & Qualifications: Essential 7+ years' experience in Adobe Data Collection and Analytics, with strong skills in HTML, CSS, JavaScript, Excel, and data visualization (Tableau, PowerBI). Ability to work independently, design solutions, write technical documentation, QA, and troubleshoot data collection code in complex environments using tag management systems. Strong More ❯

translate stakeholder goals into functional and technical requirements , ensuring clarity between business need and technical delivery. Design and develop intelligent, adaptive web platforms leveraging modern frameworks (React, TypeScript/JavaScript, CSS, AWS Amplify, GraphQL). Apply AI-assisted tooling and automation throughout the development lifecycle — from code generation and testing to deployment and optimisation. Lead innovation by evaluating and integrating … in accessibility, privacy, and performance while maintaining clean, modern, and secure codebases. What You’ll Bring Strong background in front-end and full-stack development using React, TypeScript/JavaScript, and modern cloud environments (AWS, GCP, or similar). Experience working with headless CMS platforms such as Storyblok, and strong understanding of API design (REST/GraphQL). Proven ability More ❯

FP&A Systems Consultant Permanent Location: UK - Fully Remote Salary: £65,000 - £80,000 (+ bonus) Skills: Unit4 FP&A, Database Administration (SQL Server or Oracle), T-SQL or PL/SQL, ETL Tools (e.g., SSIS), Microsoft Server Operating Systems More ❯