senior java backend developer jobs in London

Senior Full Stack Engineer / Developer (TypeScript React API Rust) London onsite to £120kOpportunity for a Senior / Founding Full Stack Developer to join a fast growing sports technology business as it establishes its new UK operation.The company sits at the intersection of sports, data, digital insights and betting, working across major US sports including...

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...

Ascend Consulting in North London seeks a senior .NET Developer to design, develop, and optimize backend systems using VB.NET, C#, and SQL Server, including SAP Business One integration.You will work with SAP consultants, front-end developers, and DevOps to ensure scalable APIs, performant SQL queries, robust logging, monitoring, and cloud-based...

About the Role We are looking for a Senior Software Engineer-Platform Services to drive our core platform ecosystem. In this role, you will drive technical excellence across dual-stack (Node.js/TypeScript and Java/Kotlin) distributed systems. Job Role• Own and operate platform services that include customer and developer portals and centralised document...

Our client has an exciting opportunity for a Fractional Fintech Backend Engineer to join the team. Location: London Salary: Competitive Job Type: Fractional, 1-2 days per week About The Company: Our client is an early-stage financial technology business building an intelligent platform that combines secure financial processing with advanced data and AI...

Plentific invites a Senior Backend Engineer to join a fully remote team across Europe. You will build and operate services powering repairs, quoting, invoicing, payments, contractor search, and fraud prevention with a Python/Django stack on AWS/Kubernetes.You’ll work with product managers, frontend and QA to ship reliable software at pace. The role...

Senior Backend Java Engineer Build software that matters. Shape the future of engineering. We're looking for an experienced Senior Backend Java Engineer who is passionate about building scalable, high-quality software and helping teams grow. This is more than a hands‑on engineering role—you'll influence technical direction, mentor other engineers, drive...

Referment is working with a UK wealth technology company whose platform is used by financial advice firms to manage portfolios, custody, execution and reporting for their clients. Everything on the platform is built by an in-house engineering team, and the business operates in a regulated financial services environment where reliability and security...

About AlphaSense:  The world’s most sophisticated companies rely on AlphaSense to remove uncertainty from decision-making. With market intelligence and search built on proven AI, AlphaSense delivers insights that matter from content you can trust. Our universe of public and private content includes equity research, company filings, event transcripts,...

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...

Blockchain / DLT Developer London - Hybrid / Remote Permanent £90,000 - £110,000 We are looking for an experiencedBlockchain / DLT Developerto join a growing technology team delivering innovative blockchain solutions within the financial services sector. You will design, build and deploydistributed ledger and smart contract solutions , working...

Note: This position does not offer any Visa sponsorship. We are only looking for applicants who are either local to London, UK, or ready to relocate to the employer's location. Note: Please share your resume in English only. Job Summary: Our Client is looking for a creative and skilled Mobile Application Developer to join their team. You will be...

JPMorganChase is seeking a Senior Lead Software Engineer in the Data Platforms team within the Chief Data & Analytics Office. You will drive the engineering of metadata, meta-modelling, and distributed systems, delivering secure, scalable technology products in a cloud environment.The role requires deep Scala/Java expertise, experience with AI-assisted...

Senior Associate, Full-Stack Engineer Opportunities.At BNY, our culture allows us to run our company better and enables employees’ growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the world’s investible assets. Every day, our teams harness cutting-edge AI and...

Capco is seeking a Senior Backend Engineer (Java) in London to design and build cloud-native backend services using Java, Spring Boot, and AWS. You will influence backend architecture, champion best practices, and contribute to modern banking technology while embracing AI-enabled development practices.You will work in Capco's Technology & Engineering team,...

We are seeking an expert Senior Low-Latency Java Engineer to join our team. Responsibilities • Latency Optimization: Profile, analyze, and systematically eliminate long-tail latency spikes across the FX eTrading application pipeline. • Zero-GC Engineering: Design, write, and refactor high-throughput core Java code utilizing zero-allocation and low-GC...

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...

Job Title: Senior Java Backend DeveloperLocation: London, UK – HybridJob Type: Contract – Inside IR35Note: No Sponsorship ProvidedMandatory: Strong in Investment BankingTechnology wise, their primary programming language is Java with Spring, DB2/Sybase for databases and Hazel cast/Redis as distributed cache.Role Profile:We are passionate and creative...

Ruby Developer – Full Stack, Rails Javascript, TDD Quant Capital is urgently looking for a Ruby Developer to join our high profile client.Our client is in this year’s fintech50 they are a disruptive force in the global investment and payments space.The office is casual with a compete tech focus (quiet coding area, loud games room).The position is for a...

Senior Flutter Developer - Full Stack - London - Outside IR35 My client, a start up requires a Senior Flutter Developer with full stack experience for a permanent position. your CV must evidence recent experience with the following: Senior Flutter Development Firebase Services JAVA Spring Boot Framework API's Data Structures This position is based in...