senior java backend developer jobs in London

Software Engineer / Developer - Voice ServicesFlint are currently seeking a Software Engineer/Developer to build, maintain, and optimize our client's next-generation communication platforms. You will bridge the gap between traditional telecommunication protocols and modern cloud-based AI. Your core focus will be developing stable SIP services using Java,...

A leading fintech company is seeking a Senior Engineer to join their team. This position offers a salary range of £95,000 to £130,000, with benefits including flexible working options and a £1,000 learning budget. As a backend engineer, you will collaborate with cross-functional teams to build resilient solutions and support customer outcomes. Experience...

JPMorgan Chase is seeking a Senior Lead Software Engineer to join its Global Sales OMS technology group in Greater London. You will be integral in enhancing and delivering market-leading technology products using your deep technical expertise. Responsibilities include developing secure code, guiding technical teams, and adopting AI-assisted engineering...

Job DescriptionSenior Software Developer – London - £45,000 DOEWhat we need is…We are looking for an experienced developer to be an essential part of our core platform team. You will be working predominantly on the technology that powers the entire business. All of our customer facing products are built on top of this platform and as such is not only...

Millions of people want to grow their money but don't know where to start. More than 90% of adults don't access traditional financial advice. That's the gap Plum was built to close.We're building the proactive money platform that makes it easy for people to smartly and sustainably grow their money. Whether you're stashing the cash for tea and toast in your...

CMC Markets is seeking a Senior Low Latency Java Developer to join our Quantitative Strategies team within Pricing & Risk, working on our high-performance, high-frequency trading platform. This is a hands-on role at the core of our market-making technology stack, where nanoseconds matter and engineering excellence is critical. You'll design and build...

FRESH. in London is seeking a Senior Ruby on Rails Developer to bolster the backend of its real-time Passenger Assistance platform. The role is hybrid, based in London with a mix of remote and office work, and focuses on scaling onboarding, reducing backend bottlenecks, and delivering robust RESTful services.You will own technical direction, design scalable...

Hybrid – London (3 days onsite / 2 days WFH)About the roleWe’re looking for a Senior Java/Kotlin Engineer who loves building real products used by real customers. You’ll join a high-impact product engineering team designing and delivering scalable, event-driven systems in the cloud.This is a hands-on senior role for someone who thrives on ownership,...

Role/Team overview Join the Release Engineering team and play a key role in delivering reliable, high-quality software releases across Broadband and Entertainment devices. You will coordinate release planning, build management, readiness, deployment and risk, working closely with Development, QA, Product and Operations to support stable customer...

ARQ is a fast-growing fintech redefining cross-border money interactions. We are seeking a Backend Engineer to design, develop, and maintain scalable backend systems powering our innovative products.You will collaborate with a talented team to enable financial inclusion and transform how people manage their money. The role focuses on greenfield development,...

We have an opportunity to impact your career and provide an adventure where you can push the limits of what's possible. As a Lead Software Engineer at JPMorgan Chase within Quantitative Execution Strategies Tech, you are an integral part of an agile team that works to enhance, build, and deliver trusted market-leading technology products in a secure, stable,...

ARQ is building a next-generation fintech platform in London, seeking a Senior Backend Engineer. You will design, develop, and maintain scalable backend systems using Java, Spring Boot, and microservices, collaborating with a world-class team to deliver secure, fast financial services.You’ll work on greenfield projects and evolve critical systems such as...

Software Engineer III - Back-end Engineer - Chase UK Location: LONDON, United Kingdom Job Information Job Identification 210619687 Job Category Software Engineering Business Unit Corporate Sector Posting Date 06/05/2025, 10:36 Locations 25 Bank Street, Canary Wharf, London, Greater London, E14 5JP, GB Job Schedule Full time Job Description At JP Morgan...

Who We Are: We are a fast growing business and technology consultant company co-founded in 2019. We offer a custom-tailored, white-glove engineering service fit for our clients, because a digital transformation is more than just technology. With a successful track record of being a preferred vendor for Fortune 500 companies and as a trusted partner for some...

About LendableLendable is on a mission to build the world's best technology to help people get credit and save money. We're building one of the world’s leading fintech companies and are off to a strong start:One of the UK’s most exciting unicorns with a team of over 800 peopleAmong the fastest-growing tech companies in the UKProfitable since 2017Backed...

Senior Software Engineer (Java/Angular) Catapult is building the future of sports performance technology, with a mission to Unleash the Potential of every athlete and team on earth. We don't just work in the sporting industry; we are actively changing it.  Since 2006, our solutions have been leading the way in sports performance software, science, and data,...

Location: Canary Wharf, London – 3 days per week in the office Salary: Up to £160,000 + benefits We’re looking for an exceptional Senior JVM Engineer to join a high-performing engineering team in Canary Wharf. This is a hands‑on role for an engineer who enjoys solving complex technical problems, building highly scalable systems and working in a strong...

DescriptionFlexTrade Systems is a provider of customized multi-asset execution and order management trading solutions for buy- and sell-side financial institutions. Submit your CV and any additional required information after you have read this description by clicking on the application button. Through deep client partnerships with some of the world's...

Your newpany You will be working for a well-known organisation working remotely with the occasion travel in the London office. This role is inside scope of IR35 and a 3–6-month contract with a possible extension. Your new roleOverview: We are seeking an experienced Full‑Stack Developer and Healthcare Technology Specialist to build a deterministic...

Senior API / PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations...