Senior React Developer Reactjavascript Jobs in UK

Professional job seekers finding United Kingdom jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
Expertini Penguin Mascot Resume Score™
Resume Score™ Instantly
Upload Your CV
Quick 30-second process

Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

Reset

Create Job Alert

 
   
Reset

Full Stack Developer | Python & JavaScript

Full Stack Developer | Python & JavaScript Salary: Up to £55,000 (DOE) Location: Wiltshire, Hybrid (2 days a week) Security clearance: Must be eligible for SC Clearance We're glad to be working with a fast-growing and innovating ...

Full Stack Developer | Python & JavaScript

Full Stack Developer | Python & JavaScript Salary: Up to £55,000 (DOE) Location: Wiltshire, Hybrid (2 days a week) Security clearance: Must be eligible for SC Clearance We're glad to be working with a fast-growing and innovating ...

Python Developer Quant Infrastructure Engineer

Overview We are seeking an experienced Python Tech Lead / Quant Infrastructure Engineer to support the development of a modern analytics and engineering platform within Credit and Capital Management. The role focuses on building scalable infrastructure, enhancing development tooling, and improv ...

Python Developer Quant Infrastructure Engineer

Overview We are seeking an experienced Python Tech Lead / Quant Infrastructure Engineer to support the development of a modern analytics and engineering platform within Credit and Capital Management. The role focuses on building scalable infrastructure, enhancing development tooling, and improv ...

Mid Level C# Developer Bolton

Bauer Media Outdoor UK is one of the leading Out of Home media owners, with more than 33,000 advertising sites in our portfolio. Our talented team of over 650 people work in 14 locations across the country, creating and delivering some of the most memorable advertising campaigns in the UK. Bauer Me ...

Global Developer Marketing & Ecosystem Lead

Cloud & Smart Industries Group (CSIG) is the core driving force behind Tencent's AI commercialization. We lead the company’s AI strategy, turning cutting-edge AI technologies into real-world solutions that redefine industries. By integrating AI with cloud and cybersecurity, we build intelligent systems that t ...

Developer API & Card Security Engineer

A VC-backed fintech company in London seeks a Product Engineer to build secure APIs for critical payment infrastructure. This role offers massive ownership within a lean team, directly influencing product direction. The ideal candidate is technically proficient in systems and network design, operates with a proa ...

Quantitative Developer (Global Hedge Fund)

Venture Search have partnered with a top-tier systematic hedge fund, that are looking for a Quantitative Developer to work closely with quantitative researchers and portfolio managers to design, implement, and maintain scalable, high-performance trading and research systems. The role sits at the intersecti ...

FX eTrading Java Developer VP

About Citi As the world’s most global bank, Citi gives you the tools to be a trailblazer. We’re not just building technology; we’re building the future of banking. With thousands of employees located around the globe, we are an international team encompassing a broad range of teams, roles, and cu ...

Lingerie Designer and Product Developer

Overview This is a lovely opportunity for a lingerie designer and developer to join a leading, innovative, private label business, reporting into the creative director. Looking to secure a lingerie specialist, you will have the required technical skill set in this area coupled with a direct ...

FX eTrading Java Developer VP

About Citi As the world’s most global bank, Citi gives you the tools to be a trailblazer. We’re not just building technology; we’re building the future of banking. With thousands of employees located around the globe, we are an international team encompassing a broad range of teams, roles, and cu ...

Junior Automation & Data Tools Developer

A property management consultancy in Leatherhead is looking for a technical specialist to enhance operational performance through automation and systems integration. The role involves analyzing business processes, writing Python scripts, and creating tools for reporting and workflow management. Ideal candidates ...

Low Latency eFX Java Developer

A global consulting group is seeking an eFX Java Developer to join their London team. The ideal candidate will have extensive experience in Core Java and low-latency techniques, crucial for developing and maintaining high-performance electronic FX trading applications. Responsibilities include collaborating with ...

Software Developer Development Consultant Remote

Would you like to be involved with supporting the development of qualifications in Software Development? We are looking for Development Consultants to join our team and be part of a growing network of associates. This role gives you the opportunity to work with City & Guilds alongside your current job, to ...

Developer Advocate & AI Platform Educator

A global technology leader is seeking a Developer Advocate to bridge the gap between their platform and the developer community. This role focuses on creating impactful content, managing community relationships, and leading developer engagement events. The ideal candidate has extensive experience in API familiar ...

Interior Landscaping Business Developer (Design)

A leading plant design company is seeking a Business Development (Design) Consultant to manage client relationships and create innovative indoor landscapes. You will be responsible for designing and implementing plant displays while achieving sales targets. The ideal candidate should possess strong sales skills, ...

Quantitative Developer, CaaS Market Surveillance

A leading financial technology firm in London is seeking a Quantitative Developer to design and validate models for market surveillance products. You will work alongside ex-Traders and Structurers to develop custom metrics in a hybrid role, ensuring client needs are met. The ideal candidate has a strong programm ...

Salesforce Developer (Fixed Term Contract)

The Opportunity Are you passionate about using technology to transform lives through education? OES is seeking a talented Salesforce Developer to join our dynamic team and help shape the future of student experiences. As a key member of our tech team, you'll work closely with internal sta ...

Lead Business Intelligence Developer – Basingstoke

“Be the Architect of Our BI Future” At Castle Trust Bank we pride ourselves in being a fintech challenger bank, providing specialist property mortgages, retail finance lending and savings accounts to a variety of customers. We’re modernising our data landscape — and we’re looking fo ...

Salesforce Developer (Fixed Term Contract)

The Opportunity Are you passionate about using technology to transform lives through education? OES is seeking a talented Salesforce Developer to join our dynamic team and help shape the future of student experiences. As a key member of our tech team, you’ll work closely with in ...

Python Developer Equities (h/f)

Python Developer London- (Hybrid) £750-£800 emagine is a high-end professional services consultancy and solutions firm Specialising in providing business and technology services to the financial services sector, we power progress, solve chall ...

Developer Advocate — Agentic Platform MoveWorks

Overview Developer Advocate — Agentic Platform - MoveWorks. Full-time, Regular employee, located in EMEA - Europe, Middle East and Africa, with a Flexible work persona. Moveworks is the Agentic AI Assistant platform that empowers the entire workforce. Our platform enables employees to conve ...

Programmer Analyst Advisory (API Developer)

Programmer Analyst Advisory (API Developer)ScotiabankScarboroughRequisition ID: Join a purpose driven winning team, committed to results, in an inclusive and high-performing culture.Join a purpose driven winning team, committed to results, in an inclusive and high-performing culture. We’re looking for a Bac ...

Fixed Term Staff Information Developer

Are you passionate about technical writing? Does ground-breaking technology inspire you? Join Arm’s Information Developers and develop content for IP products that power 95% of the world’s connected devices—from healthcare to smart homes to infrastructure. This role is a one-year Fixed Term Contrac ...

OutSystems Developer Scalable, Secure Applications

A tech solutions provider in Greater London is looking for an OutSystems Developer to build scalable, low-code applications. The ideal candidate will have 2-5 years of experience in OutSystems development and a strong understanding of low-code application architecture. Responsibilities include developing logic, ...

Security Cleared Dynamics 365 Developer

A consultancy company in Greater London is seeking an experienced MS Dynamics 365 Developer to enhance finance and procurement modules. The ideal candidate will have strong expertise in Dynamics 365 F&O customisation, X and C# development, and working in Agile environments. Current security clearance (SC, DV, or ...

RF / Wireless Algorithm Implementation Developer

Turning RF comms algorithms, models and metrics into robust, optimised production code Cambridge; to £highly competitive + benefits This company works at the cutting edge of RF communications hardware, firmware and software design. They are seeking a software engineer with practiced skills ...

12 Month Internship C# Developer

We are seeking an Intern Developer with strong communication skills and a keen interest in Financial Services. This role offers the opportunity to work closely with front office users, including traders and risk analysts, providing significant exposure to a variety of financial products. The ideal candidat ...

Cloud Native .NET & AWS Developer

A leading analytics firm in Norwich seeks a developer to design and develop scalable distributed systems. The role involves working with AWS technologies, including Lambda and microservices, to enhance insurance solutions. Ideal candidates will have a strong background in cloud-native development and enjoy colla ...

Content‑Driven Developer Advocate — Remote

A leading digital product company is seeking a Developer Advocate to create engaging and effective content for developers. In this role, you'll work closely with product teams to produce documentation and tutorials that facilitate user engagement. The ideal candidate has excellent communication skills and experi ...

JetBrains C/C++ Developer Advocate

JetBrains makes industry-leading professional IDEs and team software. We are now seeking a Developer Advocate for the C/C++ ecosystem and our product, CLion. A successful candidate will blend their technical expertise, community engagement, and strategic collaboration to enhance our users’ experience and p ...

Front Office Derivatives Developer (Python)

A global financial services firm in London seeks a Front Office Developer to enhance applications for their trading desk. The role requires strong Python programming skills, professional development experience, and an understanding of risk management and trading activities. Successful candidates will work closel ...

kdb+ Developer (Sponsorship opportunities available)

Company Description At Data Intellect it has never been just about data or technology, they are our tools. It’s about human intellect, collaboration and providing solutions for the most complex of challenges. We do this by living the (DI) code:We are Problem Solvers who are ...

Java Developer eSC/eDV Cleared

Introduction At IBM CIC, we provide technical and industry expertise to a wide range of public and private sector clients in the UK. A career in IBM CIC means you’ll have the opportunity to work with leading professionals across multiple industries to improve the hybrid cloud and AI journey for th ...

Junior Game Developer — Prototyping & Simulations

A leading technology firm is seeking a Junior Game Developer in Greater London. The ideal candidate will have a BSc in Computer Science and experience in game development engines like Unity or Unreal. Responsibilities include developing game simulations and prototyping exciting game ideas. This role offers a fun ...

Lead Full Stack Software Developer

Technical Lead Full Stack Developer (TypeScript, JavaScript, Node) Location: Hybrid working within Hampshire Salary: Competitive + benefits We're working with a fast-growing UK SaaS technology company that builds data-driven digital products used by commercial teams to better unders ...

TPP Software Developer (Summer Internship)

The Role The summer internship is for university students who are in their penultimate year. Working alongside our Software Developers you'll get the opportunity to work on exciting new projects, developing cutting‑edge software. Our interns typically join us for 8 to 12 weeks but we are flexible ...

Developer, Packaging Development (Fixed Term)

Are You Ready to Make It Happen at Mondelēz International? Join our Mission to Lead the Future of Snacking. Make It With Pride. Working as part of a cross‑functional team, you deliver the RDQ activities required to complete Packaging Design and Packaging Deployment for Innovation/Growth p ...

Remote Intern: Developer Experience & Outreach

A tech company specializing in WebAssembly is looking for a Software Engineer intern. This full-time, paid position offers an opportunity to work with a talented team on challenging projects, focusing on expanding the user base, improving documentation, and enhancing social media presence. Candidates should be e ...

Graduate Software Developer in Test

Graduate Software Developer in Test (Python SQL) Newcastle onsite £33k Do you breaking things to see how they work and putting them back together again? You could be progressing your career at a FinTech start-up, they have secure backing and an established Hedge Fund client as a par ...

.NET Developer Stoke on Trent

.NET Developer - Stoke-on-Trent 6 days ago – be among the first 25 applicants. Our client, a world‑class entertainment company, has been producing unparalleled entertainment experiences for over 50 years. Their global business comprises film studios, television stations, theme parks, medi ...

.NET Developer Welwyn Garden City

.NET Developer - Software House – Welwyn Garden City (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Azure, Angular 21, Vue.js, TypeScript, Multithreading, RESTful, ASP.NET Core Web API, EF Core 10.0, Programmer, Full Stack Engineer, Architect, .NET Developer) Do you ...

Salesforce Developer (Fixed Term Contract)

The Opportunity Are you passionate about using technology to transform lives through education? OES is seeking a talentedSalesforce Developer to join our dynamic team and help shape the future of student experiences. As a key member of our tech team, you’ll work closely with intern ...

Legacy VBA Developer Stabilize & Modernize

A technology solutions company in Gloucester is seeking a skilled vBA Developer to support and enhance legacy applications built on Microsoft Access. You will maintain and modernize older systems while troubleshooting and improving existing code. The ideal candidate has strong experience with Visual Basic and a ...

Salesforce Education Cloud Developer — Hybrid

A leading consulting firm in Greater London is seeking a Salesforce Developer to enhance the digital experience across the student lifecycle using the Salesforce Education Cloud. This role involves designing and maintaining solutions, collaborating with various stakeholders, and ensuring high-quality deliverable ...

Lead Software Developer Leeds cGBP50K

Lead Software Developer - Leeds - c£50K An established organisation is looking to appoint a Lead Software Developer to help modernise and utilise the broader team across newer technologies. This is a key role within the development function, combining hands‑on technical delivery with team ...

Junior QA Analyst (Developer Pathway)

ZeroLight is a visualisation platform for brands that want to build stunning digital customer experiences that captivate and convert. Whether it’s creating world-beating product configurators, producing photoreal CGI content, or accessing enterprise-standard cloud-streaming, ZeroLight makes the process sim ...

Lead Salesforce Developer | Hybrid + Mentoring

A leading green energy company in the UK is seeking a Salesforce Developer to manage and enhance their Salesforce platform. You will lead a team, collaborate on best practices, and provide technical solutions in a self-motivated environment. Ideal candidates will have extensive Salesforce development experience, ...

Fixed Term Staff Information Developer

Are you passionate about technical writing? Does ground-breaking technology inspire you? Join Arm’s Information Developers and develop content for IP products that power 95% of the world’s connected devices—from healthcare to smart homes to infrastructure. We’re looking for an expert technical autho ...

.NET Developer Newcastle upon Tyne

Overview .NET Developer - Global Phenomenon – Newcastle upon Tyne, Tyne and Wear (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, .NET Aspire, CI/CD, Azure DevOps, EF Core 10.0, Agile, HTML Living Standard, CSS Living Standard, Programmer, Full Stack Engineer, Architec ...

🚀 Boost Your Hiring Chances with Our AI-Powered Tool-Kit

Stand out from thousands of applicants. Use our proven career tools to optimize your applications and land your dream job faster.

To-Do Planner

Organize your job search and personal tasks. All data is confidential.

Open Planner

Wellbeing Center

Access your confidential wellness report and resources to manage job search stress.

Check Wellbeing

Skill Coach

Plan your skill development with O*NET support to stay competitive in your field.

Start Coaching

Outfit Helper

Get AI-powered suggestions on what to wear for your next interview.

Find Outfit

Income Tax Calculator

Plan your finances with our calculator, updated for 2025 tax regulations.

Calculate Tax

Salary Benchmark

Get accurate, AI-supported salary trends to know your worth and negotiate better.

Check Salaries

Interview Practice

Practice for any interview with AI-enabled Q&A sessions. All data is private.

Start Practicing

Interview Predictor

Use our AI-supported tool to predict potential interview questions based on your resume.

Predict Questions

Interview Practice Timer

Use our mock interview trainer to perfect your answers under timed conditions.

Start Timer

Behavioral Mastery

Ace tricky behavioral interviews with our AI-powered practice module.

Master Answers

Question Journal

Confidentially record interview questions you were asked for future reference.

Open Journal

Interview Ace

A comprehensive tool to help you master every aspect of your interviews.

Become an Ace

Q&A Logs

Confidentially track your answers to common questions and refine them over time.

View Logs

Application Planner

Schedule and organize your job applications in one confidential planner.

Open Planner

Cover Letter Tool

Create perfect, tailored cover letters for each application with AI support.

Generate Letter

Resume Score

Get instant feedback on your resume with our NLP-supported analysis tool.

Check My Score

ATS Score

Check your resume's compatibility with Applicant Tracking Systems (ATS).

Check ATS Score

Application Analyzer

Use AI to analyze job descriptions and optimize your application materials.

Analyze Application

Career Visualizer

Confidentially plan and visualize your long-term career path and goals.

Visualize My Career

Offer Genius

Get intelligent insights and strategies to confidently negotiate job offers.

Negotiate Offers

JobFlow

Track your entire job search progress from application to offer with this intelligent tool.

Track My Flow

JobSense

Our intelligent matching engine that provides smart job recommendations.

Get Smart Matches

Networking Toolkit

Tools to build and manage your professional connections. All data is confidential.

Build Network

Professional CV

A classic, O*NET supported template for corporate and professional roles.

Use This Template

Executive CV

A premium, O*NET supported template designed for senior and C-level positions.

Use This Template

Modern CV

A fresh, stylish, O*NET supported template perfect for tech and modern industries.

Use This Template

Creative CV

A visually distinct, O*NET supported template for design and artistic roles.

Use This Template

Minimalist CV

A clean, simple, O*NET supported template that focuses purely on content.

Use This Template

Europass CV

The standard European Union recommended format for wide compatibility.

Use This Template

Student CV

An institution-recommended template perfect for internships and first jobs.

Use This Template

Graduate CV

An institution-recommended template for recent graduates entering the workforce.

Use This Template

Academic CV

The researcher-recommended format for roles in academia and research.

Use This Template

Developer/IT CV

A tech-savvy recommended template to highlight your technical skills.

Use This Template

Skilled Worker CV

A trades-recommended template to showcase hands-on skills and experience.

Use This Template

Monochrome CV

A sleek, black-and-white, O*NET supported template for a professional look.

Use This Template

Art CV

An artist-recommended template that allows your creativity to shine.

Use This Template

Harvard CV

A researcher-recommended template based on the classic Harvard format.

Use This Template

Volunteer Research

Help us improve our platform by joining our community research program.

Join Research

Review Us

Share your experience with our tools to help other job seekers.

Share Experience

Register

Create your free account to save jobs, build your profile, and track applications.

Create Account

Login

Access your dashboard, manage applications, and continue your job search.

Access Your Account

Profile Builder

Create a comprehensive professional profile that attracts recruiters and showcases your skills.

Build Your Profile

View Profile

See your public profile exactly as employers will see it. Make sure it's perfect.

Preview Profile

Bookmarked Jobs

Keep track of all your saved job opportunities in one organized place.

View Saved Jobs

Your Reviews

View and manage all the company reviews you've submitted.

See Your Reviews

Following

Manage the list of companies you follow to stay updated on their new openings.

Manage Following

Find Companies

Discover and research top employers in your country and industry.

Discover Employers

Standalone CV Builder

Use our O*NET supported CV builder to create a professional resume from scratch.

Build Your CV

PDF to DOC (Beta)

Convert your PDF resumes or documents into editable Word (DOC) format.

Convert PDF

DOC to PDF (Beta)

Create universally compatible PDF documents from your Word (DOC) files.

Create PDF

General FAQ

Find answers to common questions about our job site and platform.

Read FAQ

Job Seekers FAQ

Get help and find answers to questions specifically for job seekers.

Get Help

Job Matching

Learn about the technology and algorithms behind how we match you to jobs.

Learn How

Personalized Matching

Discover how we use your profile and activity to provide customized job suggestions.

Learn More

Quick Apply

Understand our fast application process and how to make the most of it.

Learn More

Alert Frequency

Learn how to manage your job alert settings so you get the updates you want.

Manage Settings

Job Alerts Guide

A complete guide to understanding how job alerts work and how to use them effectively.

Read Guide

Resume Matching

Learn how our system matches your resume to job requirements.

Learn More

Ethical Branding

Read our guide to building a professional and ethical personal brand.

Read Guide

Candidate Visibility

Learn how to increase your visibility to recruiters on our platform.

Increase Visibility

Verified Badge

Find out how you can get a verified badge to build trust with employers.

Get Verified

AI ATS Technology

Learn about the advanced AI and ATS technology that powers our platform.

Learn More

ATS Ranking

Understand how Applicant Tracking Systems rank you as an applicant.

Learn More

Semantic Matching

Learn how our AI-powered semantic matching goes beyond keywords.

Learn More

    Senior React Developer Reactjavascript Jobs in United Kingdom Job Search Guide, Trends and Insights