senior java backend developer jobs in London

Lead Java Engineer - London Reference Code: -en_GBContract Type:PermanentProfessional Communities: Software EngineeringJob Title: Lead Java Engineer Location: London About the Job you are considering: Join Capgeminis Cloud & Custom Applications (C&CA) practice within the Financial Services business, where we help clients solve complex challenges...

Backend Software Engineer - Product Eligibility Full-time Compensation: GBP 68,000 - GBP 87,500 - yearly Wise is a global technology company, building the best way to move and manage the world’s money.Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international...

Role: Senior Backend Engineer (Product) Location: Hybrid - London Compensation: Up to £130,000 + equity We’re supporting a next-generation AI company developing a groundbreaking platform that automatically creates and scales immersive 3D environments. The team is bringing world-class technology from research to reality — turning complex creative...

Our client is a digital and technology consultancy. About Us: Our client, part of our client, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery. We work closely with our clients to deliver secure, accessible, user-focused services that evolve...

Focus on greenfield development and improvement of existing systems Build REST APIs Engineer microservices Evolve systems supporting card payments, treasury management, transaction booking, and crypto liquidity Develop predominantly with Java 25 on the backend and PostgreSQL Use Spring Boot for delivery Develop business logic with emphasis on clean,...

LMAX is renowned for its high-performance, ultra-low latency (we measure in microseconds) exchange written in core Java. We constantly push technology further than most, especially in our greenfield projects, driving the financial industry in new directions. Developers are encouraged to constantly develop and learn new skills. Pair programming supports...

Location: UK (Hybrid / Onsite as required) Experience: 2–5 years Role Type: Fixed Term Contract Overview We are building a modern Data Fabric platform that enables the ingestion, transformation, and serving of large volumes of data as high‑quality, reusable data products for analytics, reporting, and operational use cases. The platform operates across...

OverviewA Java Developer role with Commerzbank AG via LevelUP HCS, based in London. A leading corporate banking and capital markets organisation is seeking a Java Developer to join their team.Company DescriptionCommerzbank is a leading international commercial bank with branches and offices in almost 50 countries. The world is changing, becoming digital, and...

We are looking for a candidate with strong Java and / or Kotlin, good oracle skills and experience, and knowledge of and experience developing and running high-throughput distributed systems. Kubernetes knowledge also preferred. Responsibilities • System Architecture & Development: Design, build, and optimize high-throughput distributed services using...

Anyone AI is recruiting skilled Full-Stack Developers (Python, Javascript/TypeScript) to work on a project with a leading AI Lab. Qualifications:Advanced professional written proficiency in English3–7 years of professional software engineering experienceStrong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or GoBackend or...

Be an integral part of an agile team that's constantly pushing the envelope to enhance, build, and deliver top-notch technology products.As a Senior Lead Software Engineer at JPMorganChase within the Data Platforms team in the Chief Data & Analytics Office, you are an integral part of an agile team that works to enhance, build, and deliver trusted...

Mulbridge Partners in London is seeking a Senior Quant Developer to join the Pricing team, blending quantitative research with production engineering to design and implement pricing, hedging and optimisation models within high‑performance Java systems.You will contribute to client pricing, liquidity modelling and automated hedging strategies while...

At The Multiplayer Group (MPG), we create world-class multiplayer experiences through Co-Dev and Full-Dev partnerships. Our people-first culture supports a diverse, global team in a welcoming and flexible work environment. With teams spread worldwide, we prioritise connection—both online and in person. Giving back is central to who we are, with a focus on...

A location technology platform in Greater London is looking for a Mid-Senior Software Development Engineer II in Navigation Traffic. In this role, you will balance rapid development of navigation solutions with system reliability as demand scales. Ideal candidates will have over 5 years of experience in backend services and proficiency in technologies like...

Millennium is seeking an experienced developer to enhance algorithmic trading systems. With over 7 years in equities execution systems, you will work on building and evolving those systems, utilizing your expert-level Java skills and understanding of market microstructure.This role requires collaboration with technologists and the ability to implement...

A growing capital markets technology business is looking to hire a Senior Java Developer to play a key role in building and evolving a cloud-native post-trade platform used across client reporting, APIs, workflow management, and trading operations.This is a hands-on engineering role with strong exposure across platform architecture, distributed systems,...

Understanding Recruitment is seeking a Junior Software Engineer for a Global FX Trading team in London. The role emphasizes core Java development in a high-performance, low-latency environment, with roughly 1 year of relevant experience and clear progression pathways.You will work alongside senior engineers, learning from them while contributing to the FX...

Java Developer (Market Data) – Java, SpringBoot, Pricing, Risk Systems, Market Data, Trading, Clearing, Post-Trade, Financial Services - London - Up to £850p.d Inside IR35 Via Umbrella My Client, a global Financial Services organisation based in the City are searching for a Senior Java Developer to join them on a contract basis. This role will be...

Senior Full Stack Developer Location: London Contract: Contract Working Pattern: Office-based We’re looking for an experienced Senior Full Stack Developer to join a small development team building and maintaining a complex, business-critical internal platform. This is a hands-on senior role with genuine technical ownership. You’ll take requirements...

This is a Development role in the creation, maintenance and enhancement of services that support the Back Office at our Financial Services & Banking client in London. STRONG STAKEHOLDER ENGAGEMENT EXPERIENCE IS ESSENTIAL! DURATION : 12 MONTHS LOCATION : 3 DAYS PER WEEK ON SITE CITY OF LONDON The role is in the Back Office Java Services team which is...