Software Engineer

TransUnion LLC.; Wilmslow; On-site; GBP 55,000 - 80,000; Full time

Job summary

A leading credit reference agency in the UK is looking for a Senior Systems Developer to join their Integrations and Decisioning team. You’ll design backend systems, write maintainable code using TDD, and collaborate with clients. The ideal candidate has strong programming skills in Node.js, cloud experience, and excellent problem-solving abilities. This position offers extensive benefits, including a generous leave policy and opportunities for professional growth.

Benefits

26 days' annual leave + bank holidays

Global paid wellness days

Generous contributory pension scheme

Private health care

Access to mindfulness tools

Qualifications

• Strong programming skills in Node.js or similar backend language.
• Deep understanding of TDD and a strong focus on automated testing.
• Experience with Cloud Platforms AWS or GCP.

Responsibilities

• Design and build reliable backend systems and infrastructure tooling.
• Use TDD to write high-quality, maintainable code and build out automated test suites.
• Mentor junior developers and contribute to a strong engineering culture.

Skills

Strong programming skills in Node.js or similar backend language

TDD and automated testing

Experience with Cloud Platforms AWS or GCP

Experience owning backend systems in production environments

Strong problem-solving skills

Tools

Infrastructure-as-code

CI/CD

observability tooling

Job description

We're looking for a Senior Systems Developer to join our growing Integrations and Decisioning team. Day to Day You'll Be:

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 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

Qualifications

• Strong programming skills in Node.js or similar backend language
• Deep understanding of TDD and a strong focus on automated testing
• Experience with Cloud Platforms AWS or GCP
• 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 communicator—both in writing and on calls

Desirable Skills & Experience

• Infrastructure-as-code, CI/CD, and observability tooling
• Experience scaling systems under sustained load
• Contributions to internal tooling or open source
• Experience with large datasets and machine learning models

TransUnion is a major credit reference agency, and we offer specialist services in fraud, identity and risk management, automated decisioning and demographics. We support organisations across a variety of sectors including finance, retail, telecommunications, utilities, gaming, government and insurance.

Benefits

• 26 days' annual leave + bank holidays (increasing with service)
• Global paid wellness days off + a bonus day off to celebrate your birthday
• A generous contributory pension scheme + access to the TransUnion Employee Stock Purchase Plan
• Private health care + a variety of physical, mental and financial fitness wellbeing programmes such as access to mindfulness tools
• Access to our diversity forums and communities so you can get involved in causes close to your heart

TransUnion - a place to grow: If there's something on the list of essential / desirable skills that you can't quite tick off, don't let that put you off applying. We are open to exploring training and development opportunities for the right candidate to ensure you are successful. We know imposter syndrome is real, lets confront it so we can continue to grow and thrive together.

Flexibility at TU: We recognise that our people need the freedom to balance their day-to-day lives with their work. This is why we've set out to create inclusive and flexible policies and practices for you to accommodate all your responsibilities and needs: children, family and beyond. If the role is advertised as full time, don't let this stop you from applying. Let us know if you're looking for a part time or flexible working arrangement and we can discuss this with you.