staff java backend developer jobs in London

Harnham is hiring a Full Stack Engineer (React/TypeScript/Java) in London with hybrid working. The role involves 65% frontend and 35% backend, delivering features for a WealthTech platform and shaping technical decisions in a modern cloud-native environment.You will work in a cross-functional squad, focusing on frontend while contributing to backend services...

Senior Full Stack Developer Internal Title: Software Engineering Senior Consultant Location: London, UK (Hybrid - typically 1-2 days per month in office) Contract: Permanent, Full-time Package (perm): £70,000 - £85,000 + 10% Bonus + 10% Shares + Benefits (see more below) About Appvia Appvia is a specialist cloud, platform, and solutions engineering...

Join to apply for the Software Engineer - Backend role at Helsing. Helsing is a defence AI company. Our mission is to protect our democracies. We aim to achieve technological leadership so that open societies can continue to make sovereign decisions and control their ethical standards. The role At Helsing we develop and deliver AI-based capabilities and the...

Salary: £30,000 - 60,000 per year Requirements: Solid, current experience developing in Kotlin and the JVM ecosystem Strong Java development background Extensive experience across the full software development lifecycle Strong experience with Spring Boot and the wider Spring Framework Experience designing and developing microservices and RESTful...

Personio's intelligent HR platform helps small and medium-sized organizations unlock the power of people by making complicated, time-consuming tasks simple and efficient. Our team of 1,500 Personios is building user-friendly products that delight our 15,000+ customers and their 1.5 million employees. Ready to make an impact from day one? Staff Engineer,...

🚀 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...

What we are building Mimica is an AI-powered process intelligence platform enabling enterprises and individuals to reclaim their most precious resource: time. We've all seen repetitive tasks and redundant processes quietly drain productivity and creativity. Not because companies don’t want to become more efficient, but because they don’t know where to...

White Collar Factory (95009), United Kingdom, London, London Staff Software Engineer - Back End About this role Do you love shaping the technical landscape and driving innovation across the organisation?  Are you passionate about solving complex business problems and supporting multiple teams toward a shared technical vision?  At Capital One, you'll...

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. Dex is an AI recruiter agent that helps you run your job search. Tell Dex your...

A tech recruitment firm in the UK is seeking an experienced Java Developer for a hybrid position, requiring one day per month in the London office. The role is an initial 6-month contract focused on developing and enhancing scalable backend systems. Candidates should have strong experience in Java, solid understanding of object-oriented design, and be...

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth and depth of coverage across four core services: clearing, agency and execution, market...

Virtual Hire Staffing is seeking a Mid / Senior Java Web Engineer for a leading global financial markets infrastructure client in London. The role involves hands-on work across backend services and web UI, delivering a modular end-to-end trade management platform in collaboration with architects and frontend developers.Requirements include strong Java with...

As part of the M&S Software Engineering team, you'll be joining a well‑loved historic brand, working on solutions that serve millions of loyal customers and thousands of colleagues! With ethical values that run right through the company's core and technology leaders that truly understand software engineers and engineering, it's an exciting time as we're...

Discover the leading companies hiring in tech right now Every season cord ranks companies hiring based on their popularity, growth and candidate experience. Surface every relevant position, direct message the people hiring and manage all your applications in one place. We index the web for open positions that might be relevant to you and bring them all in...

Zühlke Engineering Vietnam LLC. is seeking a Senior Fullstack Developer to join a high-performing engineering squad in London or Manchester.You will work on backend-led services using Kotlin or Java 17+, building APIs and event-driven flows, and contribute to modern web interfaces with React and TypeScript. The role emphasizes AI-augmented engineering and...

Our client is a global investment management firm. About this role What are Aladdin and Trading Engineering?You will be working on our client's investment operating system called Aladdin. Aladdin is used both internally within our client and externally by many financial institutions. Aladdin combines sophisticated risk analytics with comprehensive portfolio...

Backend Software Engineer Term: 6 Months Pay: £888 per day Inside IR35 Location: Kings Cross London Hybrid Our client see a world in which advanced applications of Machine Learning and AI will allow us to develop novel therapies to existing diseases and to quickly respond to emerging or changing diseases with personalized drugs, driving better outcomes...

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...

About ARQ ARQ is one of the fastest-growing fintechs in the world. Our mission is to redefine how people interact with money across borders, building the infrastructure to move value seamlessly. We’re still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you’re excited by big challenges,...

As part of the M&S Software Engineering team, you’ll be joining a well-loved, historic brand, working on solutions that serve millions of loyal customers and thousands of colleagues. With ethical values running through the company’s core, and technology leaders who truly understand software engineering, it’s an exciting time to join us as we redefine...