senior java backend developer jobs in London

Golang Backend Engineer, Financial Product Fraud London, England Our Global Structure Deliveroo is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we’re unlocking new possibilities as one global...

About 9fin9fin 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,...

Backend Engineer Primary location: London, United Kingdom. Company: Jack & Jill – a well‑funded green energy startup. Job Description You will architect the core digital infrastructure for a next‑generation energy platform focused on global decarbonization. By building high‑volume pipelines and real‑time digital twins of renewable assets, you will...

About Us: Founded 20 years ago and headquartered in Chicago, the DV Group of financial services firms has grown to more than 600 people operating throughout North America, Europe and Asia. Since spinning out of a large brokerage firm in 2016, DV Trading has rapidly scaled as an independent proprietary trading firm utilizing its own capital, trading...

Updraft. Helping you make changes that pay off. Updraft is an award winning, FCA-authorised, high-growth fintech based in London. Our vision is to revolutionise the way people spend and think about money, by automating the day to day decisions involved in managing money and mainstream borrowings like credit cards, overdrafts and other loans. A 360 degree...

**About Radiant** We’re looking for a Senior Software Engineer with strong experience in Golang and Kubernetes to join our core product team. In this role, you'll design and build high-performance, cloud-native back-end systems and scalable APIs to support AI workloads, including LLMs and GPU-based services. You’ll collaborate closely with...

We are currently seeking a Full Stack Engineer to join our dynamic team. Neoflow prides itself on its commitment to innovation, and as our Full Stack Engineer, you will play a pivotal role in developing and implementing cutting-edge solutions. This role is not just a job—it's a career packed with opportunities to grow and make a significant impact in a...

Understanding Recruitment is assisting an AI infrastructure company in London to hire a Senior Backend Engineer to help shape a data generation platform. You will contribute to building scalable features in a fast-paced environment.Join a hybrid London team, work with Kotlin (and possibly Java), and focus on performance, scalability, and technical direction...

Description 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...

Runa is pioneering a first-of-its-kind payment rail that enables the seamless, global money movement at scale. Legacy banking and payment infrastructure struggles to support the demands of today's low-volume, high-velocity payouts, leading to inefficiencies in global payouts. Businesses worldwide send over $20 trillion annually in rewards, remittances, and...

About FreetradeFreetrade’s mission is to become the default place to invest. Investing has been too complicated and expensive for too long, keeping millions from making the most of their savings.We’re changing that.We’re building our team and looking for people who are excited to reshape how our customers invest and grow their wealth. If you’re...

Citi is seeking a Senior Java Software Engineer for FX Options Risk (VP) to design, develop, and optimize our high-throughput, real-time risk system. You will work on low-latency processing, collaborate with the FX Options Trading desk, and guide the team with architectural excellence.The role requires deep Core Java expertise, experience with real-time...

A World-Changing Company   Palantir builds the world’s leading software for data-driven decisions and operations. By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more.The Role   Palantir Foundry is an end-to-end platform...

Mandatory : Candidate needs to have good experience in Java, Microservices, Kafka, Spring boot, AWS/Azure and 30% of experience in React. Java Back-end developer with Azure/AWS skills for London location. Major Duties •Liaise with fellow developers •Designing and implementing microservices which use the spring boot framework. •Working in...

Netcompany is hiring a Senior DevOps Engineer (Java) in London, UK. The role focuses on implementing and supporting improvements, accelerating delivery times, and unifying customer-focused DevOps practices across development, QA, IT Operations and Infosec.You will leverage AWS, CI/CD pipelines, Terraform, Kubernetes and Helm to automate and scale...

Senior Product EngineerLocation: Nine Elms, London. Full time- hybrid with at least 3 days a week on site.You'll need the right to work in the UK and be based in London. We are not able to offer visa sponsorship for this role.About ZappZapp is building the future of convenience with a full stack approach to on-demand essential items, 24/7, delivered in...

TechForce seeks a Senior Golang Developer to design, develop, and maintain high-performance backend systems powering our core products. You will work closely with product managers, designers and engineers to deliver scalable and robust solutions.Responsibilities include architecting features, optimizing code, and ensuring quality with testing, code reviews,...

Salary: Competitive, dependent on experienceWorking Pattern: Monday to Friday, hybrid working with three days per week in our London officeAbout UsPraetorian Connections Ltd (PCL) is a leading provider of language-enabled Open Source Intelligence (OSINT), supporting geopolitical, security, and risk-focused decision making. We deliver high-quality OSINT...

The Opportunity JUXT is partnering with a **Tier 1 investment bank** on a strategic initiative to build its next-generation **FX Risk Platform** . The programme is consolidating risk management capabilities into a modern, scalable architecture while decommissioning multiple legacy risk applications. We are looking for a **Senior Kotlin /...

Cerillion is a leading provider of billing, charging and customer management systems with more than 25 years’ experience delivering its solutions to the telecoms sector.We are looking for a Senior Developer to join our Software Engineering team in London. Thisrole is ideal for a hands-on technologist who enjoys tackling complex business challenges...