Senior Software Development Engineer in Test (SDET) - B2B SaaS | Hybrid

B2B SaaS | Hybrid – 2-3 days office | UK

Role overview

Accessible rail travel depends on systems that work reliably in live environments.

Our Passenger Assistance platform turns passengerassistancerequests into coordinated action inside live rail operations.

We’re looking for a Senior Software Development Engineer in Test (SDET) to act as a true development partner, embedded within our feature teams rather than operating as a traditional QA resource. You’ll write code, collaborate closely with engineers, and ensure quality is built into features from the start through meaningful, business-aligned automated testing - not just test case execution or edge-case overengineering.

Strategic Context

Transreportexists to remove structural barriers in rail travel. Our vision is that everyone has access to travel everywhere.

As a Series A technology company and recipient of a King’s Award, weoperateacross the UK, Japan and the EU, delivering award-winning accessibility and safety platforms that have supported over 10 millionassistancerequests for more than 1 million users.

As our platform scales across markets and grows in complexity, we are hiring a Senior SDET to embed quality engineering into feature development and strengthen automated test coverage across our systems.

Within 6months, you will

• Establish strong collaboration patterns with backend and mobile engineers
• Improve automated test coverage across core business workflows
• Strengthen CI/CD integration for automated testing
• Introduce clearer quality standards within feature development

Within12months, you will

• Act as the go-to quality engineering partner across multiple product areas
• Reduce regression issues through robust, business-focused automation
• Influence architectural decisions to improve system testability
• Help scale automated testing practices as the platform grows

Responsibilities

• Collaborate with developers during feature development to design and implement automated tests thatvalidatecore business functionality
• Own and improve unit and integration testing across services and platforms
• Build andmaintainscalable automated test suites integrated into CI/CD pipelines
• Contribute to code reviews and architecture discussions to improve testability and quality
• Ensure testing focuses on real-world business scenarios rather than exhaustive edge cases
• Partner with Ruby backend and iOS/Android teams tomaintainconsistent quality standards

Technical Environment

• Backend: Ruby /RSpec
• Cross-functional collaboration with iOS and Android engineers
• Focus on automated testing (not manual QA)

Requirements

Must Haves

• Strong experience with test automation frameworks and tools (preferably in Ruby /RSpec)
• Solid understanding of the SDLC in a coding-heavy environment
• Ability to write and review code as part of quality engineering
• Experience integrating automated tests into CI/CD pipelines
• Comfortable working closely with developers during feature development
• Ability to align automated testing with business requirements rather than focusing on manual QA

Nice to Haves

• Experience working with mobile ecosystems (iOS / Android)
• Experience in Ruby-based backend environments
• 25 days holiday
• Free flu jab for you and your family

We value

• Clarity over bureaucracy

Interview Roadmap

1. Screening Call (30 mins) – Recruiter alignment

2. Technical Exercise – Automated testing approach & coding discussion

3. Deep Dive Interview – Quality engineering, architecture, and collaboration with Engineering & Product

4. Final Interview – Culture and leadership alignment

We aim to complete the process within4weeks.

We’rea Disability Confident employer and we welcome applications from disabled candidates. If you need any adjustments at any stage of the recruitment process, please tell us what would help -we’llwork with you to make the process as accessible as possible.

We also offer a Guaranteed Interview Scheme (GIS) for candidates who consider themselves to have a disability as defined under the Equality Act 2010.

If youindicatethisoptionin your application and your applicationdemonstratesthat you meet the essential criteria for the role,you’llbe invited to interview or assessment.

Choosing GISdoesn’tguarantee a job offer. If you have any questions, please get in touch.

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