senior react developer jobs in Windsor, Berkshire

Mobile App Developer - IoT Payment Technology A new role has become available at a company developing the latest in IoT payment technology for a Mobile App Developer with experience in React Native development. With this payment solution being used by financial institutions, wearable manufacturers as well as events and stadium owners, the possible applications of this secure payment technology...

We are currently recruiting full stack developers to join a trading technology team at a leading investment firm. This team is responsible for building a new front-office trading platform used directly by traders and quants. These roles are best suited for candidates with experience in full stack development using React and Python and particularly those who have built trading platforms from the...

Python Developer / Full Stack Engineer (Python Django React) Remote UK to £80k Do you have strong Python and Django skills? You could be progressing your career at a tech scale-up, with recent investment, that is helping vulnerable people to reclaim money due to them via irresponsible lending. As a Python Developer you will collaborate with the CTO and work with modern web technologies...

React Native Developer - Hybrid - Outside IR35 | React Native | FinTech | JavaScript | TypeScript We’re working with a fast-growing FinTech in London that’s building next-generation mobile products used by thousands of customers daily. They’re looking for an experienced React Native Developer to join the team on a contract basis, contributing to high-impact features across their mobile...

Role: React Developer (Junior - Mid-Level) - Up to £130k Base Salary + Bonus + Package Salary: Up to £130k Base Salary + Bonus + Package Location: London (Hybrid) Skills Required: Extensive React experience needed This firm is an elite investment institution that uphold extremely high tech standards. They are made up of some exceptionally talented individuals who above all are passionate...

You must speak, write and be able to understand fluent English. - Deep knowledge and regular usage of Firebase suite, especially Firestore. - Strong proficiency in TypeScript and modern JavaScript (ES6+).

You must enjoy constantly learning and researching to improve your level of expertise.

A Top-tier London quant fund is hiring a Quantitative Developer to build its reporting and analytics platform that delivers real-time trading insights to hundreds of researchers across all their asset classes. If you've already been writing production code in a systematic trading environment, you know what this means: resilient tools that quants and traders depend on to understand PnL, monitor...

Paragon Alpha are working with a hedge fund famous for mid frequency equity trading, while also having a successful L/S Equity desk running strategies out of London. The desk need to hire two Quantitative Developers in London, to build signal generation frameworks, back-testing engines, and full stack trading apps. You would be on a specialised desk and partnering with traders and researchers,...

You will have 20 work from anywhere days added on top which you can use to make soime weeks 2 days a week from home.

You will be proud to show how you’ve impacted other parts of a business and delivered results

You will be pushing frameworks and languages for good business reasons

🚨 Full Stack Product Engineer – SaaS Startup 🚨 We’re excited to partner with a profitable SaaS startup experiencing rapid growth and strong ARR in a short timeframe. Due to increasing customer demand, they’re expanding their engineering team and looking for product-minded engineers to join them on their journey. 💼 Role Details Title: Senior Product Engineer Location: Hybrid – 3 days/week in...

Job Role: Lead Software Engineer, React Native Before applying for this role, please read the following information about this opportunity found below. Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our innovative application using React Native. Working with a...

We are partnering with a leading hedge fund that is hiring a full stack engineer to join a high performing technology team supporting one of their key trading groups. The team builds advanced analytics platforms and internal tools using Python on the backend, with modern React and TypeScript driven frontends that help traders analyse markets, manage risk, and make informed investment...

My client is a London-based fintech building secure mobile products that help people manage and protect their money in challenging economic environments. Their mission is to make modern financial tools accessible, trustworthy, and resilient—especially for customers who are underserved by traditional banking. This is a full-time, onsite role in London (Shoreditch). As a React Native Mobile...

On a mission to help people who have been diagnosed with chronic kidney disease, this start-up are looking to bring on a Senior TypeScript Developer, who’s fully embraced AI-assisted development. Their mission is to make life better for people suffering from kidney disease by building one of the first algorithm-based behavioural change programmes. The application that does this brings together...

You will be working in a fast-paced environment to develop new website themes and add new features in a complex Next. js-based codebase (including a CMS). This is a great opportunity for the right person to take on a challenging and broad role. Homeflow is operating on a fully remote basis but occasional travel will be required for our company meet ups (bi-annually at most in the UK).

Senior Backend Developer (.NET | AI-First SaaS Platform) Compensation: Competitive, based on location and experience Location: UK or Turkey (Hybrid – Office & Remote) Keepnet is an AI-driven SaaS platform experiencing strong, sustained growth in the UK with growing global momentum, helping organisations manage human cyber risk at scale. With Agentic AI live in production, Keepnet runs...

🚀 Senior Full-Stack Engineer – TypeScript / React / AWS 💰 Up to £80k | Fully Remote (UK) 💻 Tech Stack: TypeScript, Node.js, React.js, AWS ✅ Slight backend lean We’re on the hunt for a hands-on Senior Engineer to join a fast-moving team delivering real, production grade systems. This isn’t R&D or proof-of-concept work, they’re shipping cloud-native, AI-enabled products that customers actually...

Role: Software Developer (React) – Up to £120,000 + Bonus + Package Salary: Up to £120,000 + Bonus + Package Location: London (Hybrid Working) Skills: React as a main language (modern JavaScript / TypeScript) This firm is an elite technology company with exceptionally high standards, known for pushing boundaries and previously setting world records in the tech space. They are made up of some...

Senior Software Engineer – AI Startup – Up to 120k 🚀🧠 💰 Salary: £70,000 - £140,000 + meaningful equity 🏙️ Location: London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack: Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used across the...

Senior Backend Developer – Node.js, TypeScript, Kafka - up to £70k Leading E-commerce Brand | Up to £70,000 | Hybrid (2 days/week in London) We’re partnering with a leading e-commerce business that’s scaling a modern, event-driven platform to support high transaction volumes and continued growth. They’re looking for a Senior Backend Developer to join a highly capable engineering team working...