staff java backend developer jobs in London

ARQ is a fast-growing fintech redefining how people move money across borders. As a Backend Engineer, you will design, develop, and maintain scalable, secure backend systems powering our financial products.You’ll work on greenfield projects and modernize existing services, using Java with Spring Boot and Postgres. A disciplined approach to code quality,...

The OpportunityWe are partnering with a Tier 1 investment bank on a major, multi-year technology transformation within its global Prime Finance Equities business.The Equity Accelerator programme is focused on modernising the technology backbone of the business — re-engineering core trading and post-trade systems, developing new data and market-expansion...

🚀 We’re on a mission to make money work for everyone. We’re waving goodbye to the complicated and confusing ways of traditional banking. After starting as a prepaid card, our product offering has grown a lot in the last 10 years in the UK. As well as personal and business bank accounts, we offer joint accounts, accounts for 16-17 year olds, a free...

Company DescriptionWise 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 payments, Wise is on a mission to make their life easier and save them money.As part of...

Company DescriptionWise 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 payments, Wise is on a mission to make their lives easier and save them money.As part of...

We help companies get compensation right.What we get paid at work has a massive impact on our lives, and it's one of the biggest factors in hiring and retaining talent - and yet so many companies struggle to get it right. They simply have no choice but to rely on poor data and unsophisticated tools for their pay decisions. That's why we created Ravio.We help...

**Job Title: Server-side Java Engineer** **Location: London (Hybrid – 3 days per week onsite)** **Duration: 12Months+** **Rate: 460GBP/Day Inside IR35 Max** **Description** We're looking for a Server-side Engineer – Mobile Application Backend to join our team. In this role, you’ll design and develop the Backend-for-Frontend (BFF) API layer that...

Join Pigment: The AI Platform Redefining Business Planning   Pigment is the AI powered business planning and performance management platform built for agility and scale. We connect people, data, and processes in one intuitive, feature-rich solution, empowering every team—from Finance to HR—to build, adapt, and align strategic plans in real...

The Experience team designs Spotify’s consumer experience—end to end, moment to moment, across every screen, platform, and partner integration. Our mission is to make listening feel effortless, personal, and joyful for billions of users around the world. That means turning complexity into clarity across hundreds of touchpoints—from our mobile and...

Engineering Graduate Programme (Backend)     Programme start date: September 2027 Please review all the graduate programme opportunities and make one application.Do you have a passion for technology? Do you want to make a difference, delivering software used by some of the biggest companies in the world? Do you love working with others in a dynamic...

Role Overview:We are looking for a strong backend Software Engineer to join the Spacetime team and help build the next generation of our platform: orchestration of 5G Non-Terrestrial Networks (NTN) and Direct-to-Cell services, and coordination between satellite operators and terrestrial mobile networks through 3GPP- and O-RAN-aligned interfaces.Spacetime...

Company DescriptionWise 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 payments, Wise is on a mission to make their lives easier and save them money.As part of...

About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis,...

Ports North is seeking a Java Developer in London with a hybrid on-site model (3 days per week). You will build cloud-based financial services applications, collaborating with agile teams to deliver secure, scalable software.The role emphasizes strong Java backend skills, Spring Boot, and experience with ETD clearing platforms. You will contribute to design...

Role: Camunda BPM Developer Location : London, UKWork setup: HybridAbout the Job you are considering:We are looking for a highly skilled Camunda BPM Developer with strong expertise in workflow orchestration and full-stack development. The ideal candidate will have extensive experience in Camunda, Java-based backend technologies, and React-based frontend...

About UsPerk (formerly TravelPerk) is the intelligent platform for travel and spend management. Built to tackle the time-consuming, manual work that gets in the way of real work, our tools automate everything from travel bookings to expenses, invoice processing, and more. By eliminating this shadow work that wastes hours, erodes morale, and saps innovation,...

Company Description We’re the company. You might not know our name, but companies like eBay, Spotify, Klarna, Uber, and Sony do, because we’re behind many of the digital experiences you use every day. We are where the world checks out, enabling over 10 billion transactions yearly for more than one billion global shoppers. Whether you want to book a...

Job descriptionJob Title: Blockchain / DLT DeveloperLocation: Ipswich, London or Remote As a Blockchain Developer at MACH, you will play a central role in designing, building, and deploying distributed ledger and smart contract solutions for our financial services clients. You will work across Ethereum, Hedera, Algorand, and MACH Chain (our proprietary...

P-1127 At Databricks, we are obsessed with enabling data teams to solve the world's toughest problems, from security threat detection to cancer drug development. We do this by building and running the world's best data and AI infrastructure platform, so our customers can focus on the high value challenges that are central to their own missions. Our...

About ExTracExTrac is a decision intelligence company used by governments, defence organisations, financial institutions, and corporates operating in complex, fast-moving environments. Our capabilities fuse curated data sources, domain-specific AI, and deep human expertise to transform information overload into clear, actionable foresight.Our ambition is to...