JavaScript jobs in Westminster

Job Description Role: SeniorReactNativeDeveloper Location: London,UK(Hybrid–2to3daysonsite) Experience: 8+ Years Key Skills: Strong experience in React Native (0.81), React 19, TypeScript 5.x State Management: Redux Toolkit, Zustand, React Query, Apollo Client Testing: Jest, React Native Testing Lib

Lorien

£9,600 - £9,840 /year

Full Stack Engineer (Contract) - Javascript Python (Cloud GCP) London (Hybrid - 2 days onsite) 12-month contract | Immediate start | Likely extension We're looking for an experienced Full Stack Engineer to join a high-performing product engineering team building user-facing, AI-powered applications.

Lumenalta

Upcoming Project – Talent Pipeline We are actively building a pipeline of experienced engineers for upcoming client projects, with some opportunities expected to begin as soon as possible. While start dates are dependent on project timing, this role reflects active hiring needs aligned with confirme

easyJet holidays is the UK’s fastest‑growing tour operator, created to make brilliant holidays more affordable and more accessible. Since launching in 2019, we’ve already taken almost two million customers away on unforgettable breaks, expanded across Europe, doubled our team year‑on‑year, and been

Senior Software Engineer (Node.js & Javascript/Typescript) | High Impact Greenfield Trading | £130k + Bonus + Benefits | London Hybrid We are partnered with an energy trading client working on one of the most unique roles in a long time. You are not required to have Financial Services experience

Mid & Senior JavaScript Engineers | Green Tech & AI | Full Stack | React.js / Node.js / TypeScript | London 2 Days Per Week | £50K - £120K + Healthy Equity Company: I'm looking for Full Stack Engineers who are excited about elegant systems as they are about real-world impact. Their mission i

Lead & Staff JavaScript Engineers | Full Stack | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-150k + Equity | 3 days hybrid in London Opportunity: We're supporting a hyper-growth fintech client that is also tech-for-good. They’ve got big hiring plans

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview Engi

JavaScript Engineers | Build the Future of Global Payments (Tech For Good) | Full Stack | £150K + Equity | Node.js / TypeScript / React.js | 5 Days Per Week London I am looking for an exceptional engineer to take ownership of a mission-critical payments platform, powering real-time money movement fo

Contract: Lead Full-Stack JavaScript Developer +Contentful CMS – FTSE100 Investment Manager Day Rate: £685 via Umbrella Engagement Working Arrangement: Remote Our client is a leading UK investment company managing assets on behalf of over 1.8 million investors. Their website is a core part of their

eFinancialCareers

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview Engi

Angeloop

Position: Ruby on Rails Developer (with JavaScript experience) Where: London, UK Start Date: ASAP Employment: Permanent Angeloop is an exciting Business Intelligence startup on a mission to change the way early-stage companies interact with investors, helping them connect, complete funding rounds an

Mid & Senior JavaScript Engineers | Green Tech & AI | Full Stack | React.js / Node.js / TypeScript | London 2 Days Per Week | £50K - £120K + Healthy Equity Company: I'm looking for Full Stack Engineers who are excited about elegant systems as they are about real-world impact. Their mission i

Lead & Staff JavaScript Engineers | Full Stack | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-150k + Equity | 3 days hybrid in London Opportunity: We're supporting a hyper-growth fintech client that is also tech-for-good. They’ve got big hiring plans

Quorum Software

Software Engineer II – PE&R (Front End JavaScript + Angular) Location: London, England, United Kingdom Model of Work: Hybrid Are you excited by challenges? Do you enjoy working in a fast-paced, international and dynamic environment? Then now is the time to join Quorum Software, a rapidly growing

83zero

£80,000 - £85,000 /year

Senior Full Stack JavaScript Developer Salary: £80,000 - £85,000 pa (depending on experience) plus benefits, perks and healthcare options Location: Hybrid / 2 x days per week - Travel to London Job Type: Permanent Security Clearance: This role is exclusively open to UK sole nationals who e

*Frontend Systems Engineer – DataGrid & Visualisation Libraries | London (Hybrid)** £150,000 – £200,000 + package Most engineers build applications. This team builds the components those applications rely on. I’m hiring for a developer tools company building widely adopted JavaScript components

JavaScript Engineers | Build the Future of Global Payments (Tech For Good) | Full Stack | £150K + Equity | Node.js / TypeScript / React.js | 5 Days Per Week London I am looking for an exceptional engineer to take ownership of a mission-critical payments platform, powering real-time money movement fo

Humand Talent

Overview Our client is seeking a skilled Software Developer to work with modern, scalable technologies and contribute to high-availability, high-throughput systems. Responsibilities Build and optimise systems using PHP 8+ with frameworks such as Laravel or Symfony . Work on event-based architectures

*Job Title** Senior Analytics Engineer, Client Strategy Visualization *Location** London *Corporate Title** Vice President Group Strategic Analytics (GSA) is part of Group Chief Operation Office (COO) which acts as the bridge between the Bank’s businesses and infrastructure functions to help deliver