Backend Software Developer jobs in Cardiff

83Zero Ltd

Job Description Full Stack Engineers (Java | ReactJS | AngularJS) Hybrid Working: 1 day per week onsite in Cardiff (non-negotiable) Eligibility: SC Eligible candidates only Salary: £60,000 - £80,000 DOE We're hiring 5 experienced Full Stack Engineers to join major enterprise banking projects foc

Public Sector Resourcing

Apply before 11:55 pm on Sunday 31st May 2026Reference number: 456943A [1] Civil Service Pension with an employer contribution of 28.97%Job grade: Grade 7 Level DContract type: PermanentBusiness area: CPS - HQ Digital Information Directorate (DID)Type of role: DigitalWorking pattern: Flexible workin

83zero

Full Stack Engineers (Java | ReactJS | AngularJS)Hybrid Working: 1 day per week onsite in Cardiff (non-negotiable)Eligibility: SC Eligible candidates onlySalary: £60,000 - £80,000 DOEWe're hiring 5 experienced Full Stack Engineers to join major enterprise banking projects focused on delivering secur

About the Project Outlier helps the world's most innovative companies improve their AI agents by providing human feedback. Do you want to shape the future of autonomous agents like OpenClaw? We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive,

About the Project Outlier helps the world’s most innovative companies improve their AI agents by providing human feedback. We collaborate with leading AI organizations to train Large Language Models (LLMs) to function as proactive, multi-step agents. Our projects focus on teaching these systems how

83Zero Ltd

Full Stack Engineers (Java | ReactJS | AngularJS)Hybrid Working: 1 day per week onsite in Cardiff (non‐negotiable)Eligibility: SC Eligible candidates onlySalary: £60,000 - £80,000 DOEWe're hiring 5 experienced Full Stack Engineers to join major enterprise banking projects focused on delivering secur

ITOL Recruit

Job Description Are you looking to benefit from a new career in Software Development? Skills shortages in the IT sector is driving the need for qualified, entry-level career seekers and career changers. We help place graduates from this programme in top UK companies and organisations needing to empl

IT Online Learning is hiring a Software Developer Placement Programme No experience needed based in Cardiff, South Glamorgan, Wales, UK . This is a Full time opportunity (£65,000). Software Developer Placement Programme No experience needed From £27,000 to £65,000 per annum Trainee Software Develope

Ofgem

Successful candidates may be based in any of our office locations – Cardiff, Glasgow or London. We especially welcome applicants from Cardiff and Glasgow. Job SummaryOfgem is working at the forefront of the fight to modernise and strengthen the UK's energy systems, driving digital innovation that wi

Ofgem

Ofgem is seeking a Junior Software Developer to enhance and maintain digital services at our Cardiff office. This permanent role involves working with technologies like C#, ASP.NET, and SQL Server in a fast-paced environment. Responsibilities include code writing, debugging, and supporting applicati

ITOL Recruit

Job Description Trainee Coding Programme – No Experience Needed Future-proof your career in Coding – starting today. Maybe you’re already working but want a more technical role with better long-term prospects. Or you could be between jobs and ready for a fresh start in tech. The ITOL Recruit Coding

ProAmpac

ProAmpac is seeking a UK based, talented, and flexible full stack developer to join our progressive and collaborative team. In this role, you will maintain and enhance a wide range of internal business systems, including internet/intranet applications and Azure based solutions. Our technology stack

About Esenda Esenda powers over £1.5bn of inbound and outbound payments annually, in the education space - from tuition and catering fees to supplier payments and payroll. We’re a revenue-generating startup with strong product-market fit, and we’re growing fast. Join us now and you’ll work on impact

ITOL Recruit

Trainee Coding Programme – No Experience Needed Future-proof your career in Coding – starting today. Looking for a career change? Maybe you’re already working but want a more technical role with better long-term prospects. Or you could be between jobs and ready for a fresh start in tech. The ITOL Re

CPS Group (UK) Limited

CPS Group (UK) Limited is seeking a Software Engineer (Java) to join their collaborative team in Cardiff. The role focuses on designing and maintaining backend applications while contributing to full-stack development in an agile environment. Key skills include strong Java experience, familiarity wi

Ascendion

About the Role: We are hiring a Java Backend Developer to join a leading banking client in the UK. The role involves building and modernizing scalable backend systems, working on microservices architecture, and contributing to high-performance, secure financial applications. Key Responsibilities: De

Sherborne Talent Solutions

I am currently recruiting for multiple skilled Backend Developer's to join a growing and dynamic development team for my highly successful international client. These roles have come about due to continuous growth and expansion within a key area for my client, offering excellent opportunities to exp

Relevance Lab

Senior Software Developer Location: Newcastle Upon Tyne, England, United Kingdom Hybrid, 2 days onsite 1 yr. contract The tech stack spans Node.js and React-style front ends with Spring Boot microservices, cloud deployment on AWS (and some Azure exposure) supported by Git-based CI/CD (GitLab and too

Turing

About Us: Based in San Francisco, California, Turing is the world’s leading research accelerator for frontier AI labs and a trusted partner for global enterprises deploying advanced AI systems. Turing supports customers in two ways: first, by accelerating frontier research with high-quality data, ad

Python Software Engineer (Mid to Senior) – Backend Focus Remote (Ireland / Northern Ireland) | 1 day per month on site Company Overview A technology-driven digital business operating a large-scale consumer platform with significant daily user activity. This is a small IT function within a broader or