java developer jobs in London

Tech Stack: Java and low-latency, JVM engineering, FX, eFX, Crypto, hedging and risk-management systems, Aeron, FIX connectivity, Linux, Multithreading,Harrington Starr have partnered with an innovative to Software Developer specialising in Crypto, FX and eFX currently developing high-performing trading systems. We’re looking for a skilled Java or Quant...

A trusted UK Central Government technology programme is looking for an experienced Senior Java Developer to join their high-impact delivery team. Working on mission-critical systems that support national infrastructure, this role offers the chance to work fully remotely on challenging and technically rich work across legacy and modern platforms.You will be...

Salary - £115'000 - plus bonus and benefitsTech Stack: Java 11+, Spring/Spring Boot, multi-threading, profiling, performance tuning, RMI, Capital Markets, TDD, BDD, Microservices,Harrington Starr have partnered with an innovative Software Vendor specialising in building SaaS applications for post-trade technology and Capital Markets. We're looking for a...

Role:Principal / Senior Java Developer – Elite FinTech Rate:Up to £750 per day Location:London Working Pattern:Hybrid Contract:Contract The Role They are looking for an exceptionalPrincipal / Senior Java Developerto join a high-calibre engineering team, working alongside some of the industry's strongest developers, architects and technical leaders. This...

A trusted UK Central Government technology programme is looking for an experienced Senior Java Developer to join their high-impact delivery team. Working on mission-critical systems that support national infrastructure, this role offers the chance to work fully remotely on challenging and technically rich work across legacy and modern platforms.You will be...

Talan is looking for a talented Java Developer with React experience to join our team delivering cutting‑edge Front Office solutions within Global Markets environments. You will play a key role in designing and enhancing regulatory, alerting, and sales enablement platforms, directly supporting front‑office users and business stakeholders across capital...

Java Developer / Backend Software Engineer (Kafka API) London / WFH to £90kAre you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career?You could be joining a global technology consultancy.What's in it for you: Salary to £90kHybrid working (x2 days WFH per week)Pension, Life...

We are looking for an experienced Senior Java Developer to join the engineering team at Xantura, helping to design, build, and evolve our cloud-based data and analytics platform used by local authorities and public sector organisations across the UK.This is a hands-on senior engineering role focused on developing scalable backend systems, improving platform...

JAVA DEVELOPER - JVM Location: Central LondonWorking Pattern: Hybrid 1-2 days in the office and the rest from home! Employment Type: PermanentSector: Financial Services THE OPPORTUNITY We are working with a high-growth financial services technology scale-up that is entering an exciting phase of expansion. This is an excellent opportunity for an experienced...

Key Responsibilities: • Develop and maintain transaction-related backend services using Java and Spring Boot. Build core business processes for order and transaction workflows. • Ensure data consistency, system reliability, and correctness across critical business processes. • Support stable operation of transaction systems under high concurrency. •...

Discover your future at CitiWorking at Citi is far more than just a job. A career with us means joining a team of more than 230,000 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 OverviewEngineer the future of global finance. At Citi, our Tech team...

Location: UK (Hybrid / Onsite as required) Experience: 5+ years Role Type: Fixed Term Contract Overview We are developing a scalable Data Fabric platform that ingests, transforms, and serves trusted data products across multiple domains. The platform spans on‑premise and cloud environments and underpins a wide range of analytics and operational...

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...

Java Developer – Data140,000 Plus Large Prop BonusIn office – City of LondonQuant Capital is hiring for a small, high-performing market maker in London. This is a Mid-to-Senior role focused primarily on Java development, with a secondary responsibility owning straightforward Python ETL/data ingestion into AWS and PostgreSQL. This is a growing team...

Referment is working with a London-based technology company that builds data transparency and accountability tools for the investment management industry. Its platform aggregates and validates cost and holdings data from across the investment supply chain, allowing pension funds, asset managers and other service providers to share and interrogate validated...

Salary - £115'000 - plus bonus and benefitsTech Stack: Java 11+, Spring/Spring Boot, multi-threading, profiling, performance tuning, RMI, Capital Markets, TDD, BDD, Microservices,Harrington Starr have partnered with an innovative Software Vendor specialising in building SaaS applications for post-trade technology and Capital Markets. We're looking for a...

Job Description We are seeking a motivated and enthusiastic Junior Java Developers to join our software development team. As a Junior Java Developer, you will work closely with senior developers and team members to design, develop, and maintain Java-based applications. This is an excellent opportunity for someone looking to grow their career in software...

Location: UK (Hybrid / Onsite as required) Experience: 5+ years Role Type: Fixed Term Contract Overview We are developing a scalable Data Fabric platform that ingests, transforms, and serves trusted data products across multiple domains. The platform spans on‑premise and cloud environments and underpins a wide range of analytics and operational...

Handelsbanken combines a long-established relationship banking model with secure, resilient, and customer-focused technology. Our technology teams enable the Bank’s decentralised way of working, delivering systems built for stability, trust, and long-term value.We are on a multi-year technology and digital transformation journey to enhance customer...

Tech Stack: Java and low-latency, JVM engineering, FX, eFX, Crypto, hedging and risk-management systems, Aeron, FIX connectivity, Linux, Multithreading,Harrington Starr have partnered with an innovative to Software Developer specialising in Crypto, FX and eFX currently developing high-performing trading systems. We’re looking for a skilled Java or Quant...