Salary: £44,000 - 146,500 per year Requirements: Strong programming skills in Node.js or a similar backend language. Understanding of Test-Driven Development (TDD) with a focus on automated testing. Experience owning backend systems in production environments. Comfort working directly with clients to gather requirements and debug issues. Strong problem-solving skills and a desire to understand the root cause of complex issues. Clear communication skills, both in writing and on calls. Responsibilities: Design and build reliable backend systems and infrastructure tooling. Use TDD to write high-quality, maintainable code and build out automated test suites. Own the reliability, observability, and performance of key services. Collaborate with clients to understand requirements, debug issues, and propose solutions. Drive improvements to system architecture, automation, and deployment processes. Mentor junior developers and contribute to a strong engineering culture. Take ownership of problems—investigate, iterate, and fix. Technologies: Backend Support TDD NodeJS AWS CI/CD Cloud DevOps GCP Machine Learning More: At TransUnion, we are a major credit reference agency offering specialized services in fraud, identity, risk management, automated decision-making, and demographics. We support organizations across a variety of sectors, including finance, retail, telecommunications, utilities, gaming, government, and insurance. When joining our team, you will enjoy a friendly, forward-thinking global business environment. We offer an excellent salary and bonus scheme, along with a comprehensive benefits package that includes: - 26 days of annual leave plus bank holidays (increasing with service). - Global paid wellness days off and an extra day off to celebrate your birthday. - A generous contributory pension scheme and access to the TransUnion Employee Stock Purchase Plan. - Private healthcare and various wellbeing programs. We prioritize flexibility, inviting candidates to discuss part-time or flexible working arrangements. We are committed to fostering an inclusive and diverse workplace, valuing individual talents and perspectives. If you require adjustments to our recruitment process, please let us know. Most of our recruitment processes are conducted virtually, enabling you to connect with our hiring managers and teams. If an in-person interview is necessary, your recruiter will inform you. At TransUnion, we embrace growth and wish to empower you, even if you don’t meet every single listed requirement. Don’t hesitate to apply; we look forward to celebrating our differences and thriving together. last updated 4 week of 2026