150,808+ Lead Java Application Developer Java Web Tech Jobs in London, UK — Local Employers Hiring June 2026

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Full Stack Cloud Solutions Engineer

Java Script Works is looking for a Client Solutions Engineer based in London, United Kingdom. The ideal candidate will have experience in Full Stack Web development and Cloud Architecture. Proficiency in JavaScript, Node.js, and Python, along with excellent communication skills, are essential. This ful ...

Python Engineer – Quant Trading & Data Science

Java Script Works is seeking a Python Engineer to join a globally recognized High-Frequency Trading firm. The ideal candidate will have strong Python skills and experience with modern data processing libraries. Web development skills, familiarity with Linux, and a 2:1 STEM degree are required. As part ...

Senior Consulting Engineer (Armakuni Network Contractor... in London Armakuni

Senior Consulting Engineer (Armakuni Network - Contractor) London, United Kingdom Posted 11 months ago Tech stack Node.js Amazon AWS Python GCP Java React JavaScript Azure Native ...

Embedded DevOps engineer in London Writer

Embedded DevOps engineer London, United Kingdom Posted about 1 year ago Tech stack Go Programming Languages Distributed Systems DevOps Bash Java Scala Python Skills <l ...

Staff Backend Engineer, Procurement Suite (Relocation to Melbourne) in London Airwallex

Staff Backend Engineer, Procurement Suite (Relocation to Melbourne) Location: London, United Kingdom (Relocation to Melbourne) Posted about 1 year ago Tech stack JVM Spring Framework Java Kotlin Spring Boot Backend ...

Engineering Manager in London Noon Academy

Engineering Manager London, United Kingdom Posted 12 months ago Tech stack Spring Framework Java React TypeScript Spring Boot React Native Manager Job Requirements ...including re ...

Implementation Consultant Fintech KYC in London Quant Capital

Implementation Consultant - Fintech KYC London, United Kingdom Posted about 1 year ago Tech stack Windows SQL KYC Java XML C Ideal Candidate Requirements A technical, mathematic, or s ...

Senior Backend Engineer in London LinuxRecruit

Senior Backend Engineer London, United Kingdom Posted 10 months ago Tech stack C Backend Java Below is a snippet of the job description. To read the full text, please click on the Apply Now link. Qualifications < ...

Junior Quantitative Researcher – Applied Scientist (London)

Quant Capital is seeking a talented Junior Quantitative Researcher/Developer in London to analyze large-scale real-world data sets. The ideal candidate should have a strong quantitative background, good attention to detail, and significant academic achievement at PhD level. Proficiency in programming languages s ...

Senior Android Engineer: Build Scalable Android Experiences

A leading online platform in London seeks a senior software developer to enhance user-facing Android applications. The ideal candidate has 5+ years of experience in software development using Java or Kotlin, and a passion for crafting scalable and user-friendly products. Responsibilities include cross-functional ...

Junior Mobile Engineer (Android/iOS) – Mandarin Fluency

Mandarin Recruitment is seeking a Junior Mobile Developer in Greater London. This role involves the development and deployment of applications, contributing to the development team with a focus on enhancing consumer experiences through technology. Candidates must have a recent Computer Science degree a ...

Senior Akka & Scala Engineer Microservices & Cloud

A technology company in Greater London is seeking an experienced software developer with a strong background in Java or other JVM-based languages, including Scala. The ideal candidate should have experience in microservices architecture and cloud services. Familiarity with containerization tools like Docker and ...

Java Developer (Full Stack) (Mandarin Speaking, £35k, Capital Markets, London or Hong Kong)

We have an exciting opportunity for a Java Developer (Full-Stack) role in a London-based Capital Markets company. This market‑leading provider delivers best‑in‑class implementation algorithmic trading, smart order processing, and transactional cost analysis services to a wide range of clients, including gl ...

Full stack Java Developer for Systematic & Credit Portfolio Trading Tools, Assistant Vice President

**_Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we bu ...

Full stack Java Developer for Systematic & Credit Portfolio Trading Tools, Assistant Vice President

Citi is seeking a highly motivated and curious full-stack engineer work embedded within the Systematic & Credit Portfolio Trading business and build out a first-class ecosystem of trading tools. This role offers a unique opportunity for in-person collaboration with traders, quants, and product development ...

Full stack Java Developer for Systematic & Credit Portfolio Trading Tools, Assistant Vice President

Citi is seeking a highly motivated and curious full-stack engineer work embedded within the Systematic & Credit Portfolio Trading business and build out a first-class ecosystem of trading tools. This role offers a unique opportunity for in-person collaboration with traders, quants, and product development ...

Senior Angular & Python Cloud Engineer (AWS)

W3Global seeks a Specialist with 5 to 7 years of experience in Angular, Python, and AWS to design and develop scalable web applications and cloud-native solutions. The position requires expertise in both frontend and backend development, cloud architecture, and CI/CD practices. Candidates should possess strong s ...

QA Automation Engineer — AI‑Driven Apps, Onsite Lisbon

A technology-driven organization based in Lisbon is searching for a QA Automation Engineer to design and maintain automated test frameworks for web and mobile applications. The ideal candidate should have over 3 years of experience in test automation, proficiency in frameworks such as Selenium and Cypress, and s ...

Software Engineer Web Apps (Agile + DevOps)

Java Script Works is seeking an innovative and detail-oriented Software Engineer to join their team in Greater London, United Kingdom. The role is focused on developing software applications that meet client needs while ensuring the highest quality standards. Ideal candidates should have experience with modern w ...

Software Engineer III JPM Personal Investing

J.P. Morgan Personal Investing offers award‑winning investments, products and digital wealth management services to over 275,000 investors in the UK. The Back‑End Engineering team focuses on delivering a great banking experience, working on projects such as fraud prevention, investments, identity services, ...

Senior Software Development Engineer in Test

Senior Software Development Engineer in Test (SDET) - Java, JBehave/Cucumber, MicroservicesPerm3 days a week on-site in Farringdon, LondonUp to £75,000 per annum A rapidly growing fintech organisation is transforming access to finance for small and medium-sized bu ...

Senior Software Development Engineer in Test

Senior Software Development Engineer in Test (SDET) - Java, JBehave/Cucumber, MicroservicesPerm3 days a week on-site in Farringdon, LondonUp to £75,000 per annum A rapidly growing fintech organisation is transforming access to finance for small and medium-sized bu ...

Senior JVM Live Debugger Engineer | AI Driven Production

A leading developer tools company is seeking a Senior Software Engineer in Greater London. This role focuses on enterprise JVM experience and exciting engineering challenges involving AI integration. Responsibilities include designing product features and developing tooling for AI-first workflows. The ideal cand ...

Rates Quant Dev VP: Build Production Trading Systems

A leading financial services firm in the UK is seeking a Quantitative Developer, Rates – Vice President to design and deliver production systems for systematic trading. You'll work closely with researchers and traders to implement resilient, performant algorithms and enhance execution platforms. The ideal candid ...

Rates Quant Developer VP: Build Production Trading Systems

A leading global financial services firm in Greater London is seeking a Quantitative Developer, Rates – Vice President. In this role, you will design and deliver production systems for systematic trading, partnering closely with researchers and traders. Candidates should have strong programming skills in Java or ...

Senior Integration Architect – IBM BPM to Camunda

A leading UK bank is seeking a Senior Integration Developer to drive engineering excellence in their digital onboarding system. This hands-on role involves leading the migration from IBM BPM to Camunda, optimizing integrations, and defining engineering goals in a high-volume banking environment. Candidates shoul ...

Node.js Game Server Engineer (Nakama & Cloud)

Java Script Works is looking for an experienced Game Server Developer in Greater London. Your role will involve collaborating with the team to design and implement game features, support platform-related systems using Node.js, and optimize interfaces. Ideal candidates should be proficient in various tools, inclu ...

Senior Front End Engineer — Crypto UI/UX (React/TypeScript)

Java Script Works is seeking a front-end software developer with over 5 years of experience. The role involves innovating and participating in building crypto services around software quality, UI/UX, security, and blockchain technology. The ideal candidate will have strong coding principles and extensive experie ...

Rates Quant Dev VP: Build Production Trading Systems

A leading financial services firm in the UK is seeking a Quantitative Developer, Rates – Vice President to design and deliver production systems for systematic trading. You'll work closely with researchers and traders to implement resilient, performant algorithms and enhance execution platforms. The ideal candid ...

Web Developer (React, TypeScript & C# / .NET)

Web Developer - (React, TypeScript & C# / .NET)We are looking for a Web Developer with strong React and TypeScript experience and some knowledge of C# and .NET to join a development team on an initial 12-month contract.Responsibilities * Develop and maintain web applications using Re ...

Senior/Lead Engineer React, TS & Cross Platform

Java Script Works is looking for a skilled Senior/Lead Engineer with expertise in React (Next.js), React Native, and TypeScript to drive their cross-platform mobile application and technology ecosystem. The ideal candidate will identify and resolve architectural and performance issues, ensuring optimal functiona ...

Java Full Stack Engineer Consultant Digital Excellence London

Java Full Stack Engineer - Consultant - Digital Excellence - London Reference Code: -en_GBContract Type:PermanentProfessional Communities: Strategy & Transformation At Capgemini Invent, we believe difference drives change. As inven ...

Assistant Manager, EAI Middleware

We are looking for an experienced Assistant Manager to join our Middleware Application team. Reporting to the Section Lead, the incumbent focuses on connecting disparate software systems, applications, hardware, and data sources so they work together seamlessly. The incumbent bridges gaps between i ...

Full Stack Web & XR Apps Developer

Imperial College London seeks a Full Stack Web App Developer for a fixed-term contract of 24 months. The role emphasizes engineering and creativity, focusing on challenging projects in interactive media and online learning. Qualified candidates will have significant experience in full-stack development ...

Remote Frontend Web Developer — WordPress & React

A digital services company in the United Kingdom is seeking an experienced Frontend Web Developer to create custom WordPress themes and provide technical support for SEO initiatives. The ideal candidate should have over 2 years of experience in frontend development, adept at coding plugins, managing servers, and ...

Full Stack Web Developer (Website Development)

Moneycorp powers global payments for corporates, institutions and high networth individuals, combining worldwide reach with local expertise. With over 45 years of market experience, two banking licenses and offices in 11 countries, our technology delivers24/7 accessibility, while our people deliver award-w ...

Web Developer Intern: Digital Marketing & SEO

Internwise is seeking an ambitious intern to assist with website and SEO maintenance within a dynamic digital marketing team. This unpaid internship offers the opportunity to work on real projects, contribute to the company's digital marketing efforts, and potentially secure a future role in the company. ...

Full Stack Web Developer (mid level)

Who We Are the company powers global payments for corporates, institutions and high net worth individuals, combining worldwide reach with local expertise. With over 45 years of market experience, two banking licences and offices in 11 countries, our technology delivers 24/7 accessibility, while o ...

Full Stack Web Developer | React + Node

Moneycorp is seeking a Mid-Level Full Stack Web Developer to enhance their website and digital ecosystem. This role emphasizes both front-end and back-end development, focusing on improving web content, optimizing performance, and integrating marketing technologies. The ideal candidate will have experi ...

Quality Engineering AI Lead Engineer

Requirements Extensive experience as a Senior QE SDET Engineeror Senior Developer Has breadth of experience across different tech-stacks, such as JavaScript/TypeScript, Java, C#, or Python, amongst others Experienced in RAG Weaviate, OpenAI, Agents, MCP, Langchain, Promp ...

Senior Low Latency Engineer — Hybrid Trading (Java/Rust)

Citi is seeking a Senior Low Latency Engineer based in London. This senior-level role involves hands-on development in Java or Rust for low-latency e-Trading platforms. You will lead application systems engineering and influence outcomes that impact global finance. The ideal candidate will have experti ...

Senior Java Engineer Cloud Native Payments (Hybrid UK)

A global payment technology leader is seeking a Senior Software Engineer based in the UK. This full-time position focuses on developing high-availability API solutions primarily in Java 11+, utilizing a microservice architecture on AWS. The ideal candidate will have over 5 years of Java backend experience, famil ...

Senior Java Engineer Front Office Pricing & Risk (London)

A financial technology company in London is seeking a Senior Java Software Engineer to join their core development team. The ideal candidate will have over 8 years of experience with Java and Python, and a strong background in trading and pricing solutions. This role involves technical leadership and collaborati ...

Senior Java Architect – Real‑Time API Platform Leader

Morgan Stanley is seeking a Senior Software Engineer to join the FID eTrading team in London. This critical position demands a highly skilled hands-on Java developer with extensive experience in real-time systems and internet-facing APIs. Responsibilities include leading architectural decisions and delivering ...

Cross Border Payments Java AVP Hybrid, AI First

A leading global bank in Greater London is looking for a Cross Border Payments Developer (AVP) to join its FX Technology team. The role involves Java development in a collaborative, AI-focused environment, enhancing systems and participating in modernization efforts. Candidates should possess strong communicatio ...

Java & REST Troubleshooter — Root Cause Solver (Full Time)

Career Moves Group is seeking a Technical Support Engineer in London, United Kingdom. The role involves providing technical support for REST APIs and Java-based services, utilizing troubleshooting tools to isolate issues. The ideal candidate has strong experience with Java and RESTful services, excelle ...

Junior Java Full Stack Engineer for Digital Transformation

Capgemini is seeking a Junior Java Full Stack-Associate Consultant in London to drive digital transformation projects. The candidate will write clean code and collaborate in multi-disciplinary teams, translating client visions into innovative solutions using technologies such as Java, JavaScript, and Spring Boot ...

Junior Technical Consultant ( Java or C# ) Learn ETRM

Junior Technical Consultant (Java / C) – Energy/Commodities Trading | London Kick-start your career in one of the most specialised and high-value areas of technology and business: Energy & Commodities Trading and Risk Management. As a Junior Technical Consultant, you’ll undertake a rigorous ...

Senior Backend Engineer (Java, Real Time FinTech) | Hybrid

Allegis Global Solutions is seeking a Senior Backend Developer to join a global engineering team focused on building a cutting-edge financial markets trading platform. This role offers you the chance to develop high-performance, real-time systems used for pricing and trade processing while collaborating acros ...

Senior Software Engineer II GraphQL/Java Spring Flexible

LexisNexis Risk Solutions is seeking a Senior Software Engineer II (Java / Spring) to build scalable, high-performance data-driven applications. You'll work on the Search and AI Platform, delivering innovative solutions that accelerate scientific discovery. The ideal candidate has expertise in Java, Sp ...

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