javascript developer react jobs in Leeds

C# Developer / Full Stack Engineer (.Net Core JavaScript) St Albans / WFH to £100k Do you have expertise with C# .Net backend development combined with JavaScript skills? You could be progressing your career in a senior hands-on role at a technology driven trading company that invest in Sports betting markets with a flat structure where you will get your voice heard and can make a real impact...

About Us: We're a forward-thinking technology company building innovative web solutions using modern development practices. Our team values continuous learning, collaboration, and cutting-edge technology to create exceptional digital experiences. Position Summary: We're seeking an enthusiastic Entry-Level JavaScript Developer to join our dynamic team on a contract basis. This is an excellent...

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.

Position: Front End JavaScript Developer Reports to: Front End Development Team Lead Hours: 40 hours Location: 3 days in North London office (Monday – Wednesday) Salary: £60 - £80,000 + eligibility for performance bonus Start date: ASAP Purpose of the role: As a Front End Developer you will join one of our multinational Scrum teams to create state-of-the-art software solutions. In all...

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...

You will be a great fit if you: - Have 5+ years full-stack experience, with strong JavaScript/TypeScript depth. - Are backend-leaning, with deep Node. js and API experience. - Have previously worked in early-stage start-ups or very lean engineering teams. - Have extensive evidence of being a hands-on individual contributor in complex codebases.

You will be expected to: ● Develop new features working with the data science ● Develop bug fixes and security patches promptly

You must be able to demonstrate the following: ● 6+ years experience full-stack development ● High proficiency with Typescript, React, Next, Azure, Pulumi and Node

Senior Full Stack Engineer | Up to £110K | One of the UK's fastest growing AI platforms | UK Remote | React/Node/TypeScript I am currently working with one of the fastest-scaling platforms in the creator economy which is a creator-first, AI-powered product that enables creators around the world to directly monetise their audiences. Every system you build will operate at serious global scale. 🎯...

About Aero A digital experience company, we sit at the intersection of insights, creativity and technology, crafting digital experiences that transform business performance. We’re a small, fully remote team with big ambitions. We work hands-on with our clients, giving our teams genuine ownership of their work. Every project you touch will be seen by thousands of people and will directly...

You should be comfortable building complex UIs and leveraging Next. js features like routing and API routes. - A good understanding of modern JavaScript (ES6+), HTML5, and CSS. - Experience with relational databases (e.g., MySQL or PostgreSQL). - Experience with containerization (Docker)

UX/UI + Frontend Developer Thursday Salary: £40-£50K Thursday is a singles IRL events company that organises singles events, trips, dinners, activities, education and media. We're building technology to scale our operations and enhance the experience for our members. We value equality and inclusion as core principles - our diverse audience deserves technology that serves everyone well, and...

A digital experience company, we sit at the intersection of insights, creativity and technology, crafting digital experiences that transform business performance. We’re a small, fully remote team with big ambitions. Every project you touch will be seen by thousands of people and will directly influence how high-profile brands connect with their audiences. We’re looking for a front-end developer...

React / Next.js Developer – Contract (Outside IR35) Location: Remote (UK-based preferred) Contract Length: 2 months Contract Type: Outside IR35 Rate: £300 per day Start: ASAP Overview We're looking for an experienced React / Next.js Developer to join us on a short-term contract to help deliver and enhance a modern, high-performance web application. You'll be working closely with product...

I'm working with a well-funded startup who are hunting for a React Native Developer to join their team near Liverpool Street. They're at an exciting time right now as they're popular in the UK market but would eventually like to be a global brand. To do this they'll be adding new features and ensuring their existing code is robust and scalable. They have an engineering team of around 40...

THE OPPORTUNITY Inspiring Teachers is an evidence-driven nonprofit working to expand access to quality education. We are building tools for managing large-scale foundational learning programs in Sub-Saharan Africa. Our approach enhances structured pedagogy with technology to enable data-driven teacher support that improves learning outcomes. Today we have programs in Ghana, Uganda and Malawi,...

Full Stack JavaScript Engineer – Join a Modern Product Team Oxfordshire-Based | Hybrid | Full-Time | Competitive Salary + Benefits Looking for a full stack role with real impact? Excited by modern architectures, meaningful features, and collaboration? Keen to grow your skills with a forward-thinking engineering team? We’re working with a fast-evolving organisation on the lookout for a...

You will already have worked in a similar startup environment and have a proven track record in delivering, fast, quality and scalable technology platforms, with time pressure to ensure we are first to market.

You will sit inside a cross-cutting technical pod, supported by dedicated UI/UX, PMO and DevOps roles.

About Aero Apply below after reading through all the details and supporting information regarding this job opportunity. A digital experience company, we sit at the intersection of insights, creativity and technology, crafting digital experiences that transform business performance. We’re a small, fully remote team with big ambitions. We work hands-on with our clients, giving our teams genuine...

Position: Front End JavaScript Developer Reports to: Front End Development Team Lead Hours: 40 hours Location: 3 days in North London office (Monday – Wednesday) Salary: £60 - £80,000 + eligibility for performance bonus Start date: ASAP Purpose of the role: As a Front End Developer you will join one of our multinational Scrum teams to create state-of-the-art software solutions. In all teams we...

I'm working with a well-funded startup who are hunting for a React Developer to join their team near Liverpool Street. They're at an exciting time right now as they're popular in the UK market but would eventually like to be a global brand. To do this they'll be adding new features and ensuring their existing code is robust and scalable. They have an engineering team of around 40 currently...