senior java backend developer jobs in London

Zühlke Engineering Vietnam LLC. is seeking a Senior Fullstack Developer to join a high-performing engineering squad in London or Manchester.You will work on backend-led services using Kotlin or Java 17+, building APIs and event-driven flows, and contribute to modern web interfaces with React and TypeScript. The role emphasizes AI-augmented engineering and...

HCLTech is a global technology company, home to 219,000+ people across 54 countries, delivering industry-leading capabilities centered on digital, engineering and cloud, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life...

Senior Low Latency Java EngineerThis is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities.The role is to provide senior, low-latency systems and...

Fanatics is searching for a Senior Software Engineer (Backend) in the United Kingdom. In this role, you will lead the design and implementation of backend services for our FMX trading platform, utilizing your expertise in Java and Go.Your responsibilities will include ensuring high-performance and fault-tolerant services, collaborating with teams, and...

About ThreecoltsThreecolts is the leading software suite for online & offline consumer brands (Amazon, Walmart, Target, Shopify, eBay, etc.). We’ve built a powerful ecosystem of software solutions to help businesses grow smarter — from revenue recovery and retail finance, to multichannel operations and pricing optimization. With over 500 employees...

Areti Group | B Corp™ in the UK is recruiting a Java/Kotlin Developer to join a major public sector programme. You will design, implement and maintain backend services in Java and Kotlin, collaborating with cross‑functional teams.Experience in a UK Government environment is essential, with monthly travel to London, Leeds or Manchester and eligibility for...

Backend C# Developer Cyprus – 10% Tax Rate Quant Capital is urgently looking for a C# to join our high profile client. Our client is a $10 billion strong Hedge fund with performance figures of 18%. You will be joining a cutting edge technology for a top quantitative Investment Manager. Success is founded on the application of the scientific method in...

Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data, through responsible and innovative solutions. **Role Overview** TP ICAP are looking for a Senior Java Developer delivering low‑latency, highly available trading system components with deep expertise in...

About us At Trainline, our purpose is to empower greener travel choices, connecting people and places. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels. Great journeys start with Trainline We’re Europe’s...

Personio is looking for a Senior Software Engineer to join their EO team in London. In this role, you will evolve backend systems that power key functionalities of Personio while working collaboratively with various teams. The position requires experience in backend engineering, familiarity with Java or Kotlin, and preferably some front-end experience in...

Millions of people want to grow their money but don't know where to start. More than 90% of adults don't access traditional financial advice. That's the gap Plum was built to close.We're building the proactive money platform that makes it easy for people to smartly and sustainably grow their money. Whether you're stashing the cash for tea and toast in your...

Please note my client is not willing to sponsor candidates requiring UK visa sponsorship.My client is one of the most ambitious and fastest growing FinTech companies in the UK. They are a recent new addition to the Sunday Times Tech Track 100.They are looking to revolutionise the banking industry via cutting-edge technology and require mid and senior level...

Ubique Systems UK Limited is seeking senior Backend and Blockchain Engineers to design and develop enterprise-grade services for digital asset products. You will build APIs, microservices, and blockchain integration components in a fast-paced, banking-standard environment.The role requires 5+ years in software engineering or architecture, strong stakeholder...

Harrington Starr is seeking a Senior Java Developer to contribute to a cloud-native post-trade platform. This engineering role involves designing and delivering scalable backend systems, working closely with Product and Client Services teams.The ideal candidate will have a strong Java background, experience with distributed systems, and knowledge of modern...

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 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 Senior Low Latency Java Engineer This is a senior...

Employment Type: Full-time and PermanentRemuneration (London; On-site): £90–120k Base Salary + Discretionary Bonus + EquityWe are a stealth-mode AI laboratory researching and developing Machine Learning models.The founding team consists of Cambridge graduates and former engineers at Microsoft, Bloomberg and Goldman Sachs. We are backed by prominent...

Project description As a Senior Full Stack Java Engineer within the US Corporate Loans POD, you will design, develop, and deliver enterprise integration solutions connecting Loan IQ with upstream and downstream platforms. You will leverage modern cloud-native technologies, AI-assisted development tools, and Agentic AI practices to improve software quality,...

the company is where designers, animators, and developers build interactive experiences. Design, animate, and code in one place. What you build in the editor is what ships in your app, game, or website. No mockups, no prototypes, no handoff. The real thing. With the company, designers and developers work with the same tools. No silos. What you see in the...

Understanding Recruitment is partnering with an FX Market disruptor FinTech seeking a hands-on Senior/Lead Java Developer to guide the next generation of Java engineers. The role focuses on technical leadership, architecture decisions, and delivering scalable microservices in the cloud, with a strong bias toward low-latency, multithreaded systems.The...

Key ResponsibilitiesDo you want to contribute to the front office of an investment bank? Are you passionate about algorithmic trading technology? Do you have experience working with real-time pricing systems and an interest in applying AI to automate workflows, surface insights and deliver robust, scalable Java server-side platforms?Job TypeFull TimeJob...