backend java developer jobs in Cardiff

You will be responsible for building scalable, high-performance Back End systems that power their banking platform.

About Prighter Prighter is a fast-growing LegalTech company building productised services and SaaS solutions for compliance with data protection as well as AI & digital governance regulations. With the mission to enable companies around the world to comply with regulatory requirements for their digital business, our services and SaaS solutions guide our global clients through the increasingly...

Java Developer – Product Engineering £60,000 – £90,000 | Remote-first (monthly meet-up in Midlands office) We’re working with a fast-growing software company that’s transforming how businesses manage complex financial workflows. Their AI-first platform helps customers simplify operations, increase transparency, and make smarter decisions — and they’re scaling quickly as demand grows. They’re...

Senior Software Developer - Java / Python with Delphi We’re looking for an experienced Software Engineer (Java/Python) to join a high-profile government project focused on modernising and integrating complex systems within a secure environment. You’ll work across backend development, integration and automation – with occasional support for legacy Delphi components as part of wider platform...

Senior Backend Developer Location: London - 1x a month Salary: Up to £95,000 (D.O.E) + benefits Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for...

My client is a global leading Digital Consultancy specialising in Cloud Adoption, Digital Architecture/Transformation & NextGen AI Solutions, with offices in London, Manchester, Newcastle and Glasgow, providing flexi working model (option of remote or hybrid with ad hoc client site travel). They are looking for a Senior Java Full Stack Engineer's (Jnr-Mid level) to join a rapidly growing team,...

Senior Java EFX Platform Developer Location: Fully Remote (UK-based) Contract: 12 Months (likely extension) Industry: Investment Banking / FX E-Trading The Opportunity We're partnering with a leading investment bank on a major greenfield build - a brand-new, in-house FX E-Trading platform. This multi-year programme is at an early stage, offering the chance to help shape architecture,...

About Apexon: Apexon brings together distinct core competencies – in AI, analytics, app development, cloud, commerce, CX, data, DevOps, IoT, mobile, quality engineering and UX, and our deep expertise in BFSI, healthcare, and life sciences – to help businesses capitalize on the unlimited opportunities digital offers. Our reputation is built on a comprehensive suite of engineering services, a...

Adobe Experience Manager (AEM) Tech Lead Java Engineer Location: Cardiff / Remote (1–2 days per week on-site) Contract Length: 6 months (starting ASAP) Day Rate: Up to £550 per day - OUTSIDE IR35 We are looking for an experienced AEM Tech Lead Engineer for a leading digital consultancy. The successful candidate will play a key role in leading the development of a complex digital platform,...

What are we building? Hard Rock Digital is a team focused on becoming the best online sportsbook, casino, and social gaming company in the world. We’re building a team that resonates passion for learning, operating and building new products and technologies for millions of consumers. We care about each customer's interaction, experience, behavior, and insight and strive to ensure we’re always...

About the Role If you’re looking for a fully remote contract opportunity working as Compiler Developer / Engineer, then we’d love to hear from you! The role will involve working on a custom tech stack for cutting-edge GPU technologies. You’ll contribute to maintaining and evolving the GPU compiler stack, focusing on backend development. What You’ll Be Doing - Developing and maintaining GPU...

Senior Backend Engineer | Fully Remote | Full Time Are you a seasoned backend engineer with a passion for building scalable APIs and robust backend systems? We’re looking for a Senior Backend Engineer to join our development team and help shape the future of our platform. What You’ll Do - Design, develop, and maintain high-quality APIs and backend services - Architect scalable software...

Senior Backend Engineer / Developer (TypeScript Node.js) Remote UK to £80k Are you a senior, hands-on Backend Engineer looking for an opportunity to take ownership and progress your career at a scaling tech company? You could be joining a growing games company that combines state of the art technology, gaming and luxury fashion. As a Senior Backend Engineer you'll join the team as they scale...

Java Developer – High-Performance Trading Systems - Fully Remote - up to £100k base About the Company We’re a fast-growing proprietary trading firm operating across multiple global cryptocurrency exchanges. Founded by a team with deep experience in financial markets and algorithmic trading, we’ve already achieved top-tier market-maker status, handling trading volumes exceeding $100M per month —...

Senior Java Software Engineer 📍Remote UK | 🌍 Global Fintech | 💳 Merchant-First Payments Ecosystem A high-growth global fintech, renowned for delivering world-class payments-related software and technology, is looking to expand its engineering team. As the company continues to scale its platform to meet growing demand, they’re seeking experienced engineers to join their collaborative,...

Backend Developer – Golang / Python / Java / Tech-First Fintech – Inside IR35 Our client is a leading, tech-first fintech building backend systems that power millions of users every day. They are looking for a Backend Developer with experience in Golang, Python, or Java who can contribute to scalable, high-performance systems and help deliver impactful products. Key Responsibilities: - Build...

Lead Backend Developer Location: London - 1x a month Salary: Up to £120,000 (D.O.E) + benefits Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead...

My client is a global leading Digital Consultancy specialising in Cloud Adoption, Digital Architecture/Transformation & NextGen AI Solutions, with offices in London, Manchester, Newcastle and Glasgow, providing flexi working model (option of remote or hybrid with ad hoc client site travel). They are looking for two Java Full Stack Engineer's (Jnr-Mid level) to join a rapidly growing team,...

Senior Backend Engineer UK Remote 6 Month Contract A fantastic contract role has opened up for a highly skilled Senior Backend Engineer with strong expertise in Python or Java. This is an exciting chance to join a leading technology company known for its high engineering standards and innovative approach to distributed systems. In this position, the Senior Backend Engineer will play a central...

Backend Software Engineer UK Remote 6 Month Contract A fantastic contract role has opened up for a highly skilled Backend Software Engineer with strong expertise in Go. This is an exciting chance to join a leading technology company known for its high engineering standards and innovative approach to distributed systems. In this position, the Backend Software Engineer will play a central role...