At a Glance
- Tasks: Own and evolve backend systems using Ruby on Rails for live rail operations.
- Company: Innovative B2B SaaS company focused on accessibility in rail travel.
- Benefits: Private healthcare, hybrid working, 25 days holiday, and volunteering leave.
- Other info: Join a culture that values ownership, clarity, and impact over hierarchy.
- Why this job: Make a real impact on accessible travel while working with cutting-edge technology.
- Qualifications: 4+ years of Ruby on Rails experience and strong understanding of PostgreSQL.
The predicted salary is between 28800 - 48000 £ per year.
Location: London
Type: Full-time
Role Overview
Accessible rail travel depends on systems that work reliably in live environments. Our Passenger Assistance platform turns passenger assistance requests into coordinated action inside live rail operations. We are hiring a Mid-Senior Ruby on Rails Engineer to own and evolve our operational systems, ensuring stability and production reliability in close collaboration with cross‑functional teams.
Strategic Context
Transreport exists 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, we operate across the UK, Japan and the EU, delivering award‑winning accessibility and safety platforms that have supported over 10 million assistance requests for more than 1 million users. As our operational demands grow, our backend systems must support increasing integrations, regulatory complexity, data volume, and reliability expectations.
Outcomes & Impact
- Within 6 months, you will:
- Take ownership of two operational Rails platforms.
- Improve test coverage and architectural documentation (e.g., C4 models).
- Stabilise key third‑party integrations and reduce recurring production issues.
- Strengthen monitoring and observability practices.
- Act as a trusted backend partner for Product and Platform teams.
- Within 12 months, you will:
- Confidently own and evolve multiple backend systems.
- Improve database performance and background job efficiency.
- Reduce operational risk across TOC integrations.
- Strengthen CI/CD reliability and deployment confidence.
- Contribute to longer‑term backend architecture improvements and scalability planning.
Tasks
- Own & Evolve Backend Systems: Maintain and improve our Ruby on Rails applications supporting operational workflows.
- Technical Quality: Write clean, well‑tested code and uphold strong security and data integrity standards.
- Integrations: Manage third‑party integrations, ensuring reliable and secure data exchange.
- Infrastructure Collaboration: Work with the Platform team on AWS‑based deployments and CI/CD processes.
- Performance & Reliability: Optimise background processing and database performance to maintain system stability.
- Incident Response: Support investigation and resolution of production issues.
- Cross‑Functional Collaboration: Partner with Frontend and Mobile engineers to deliver robust, scalable APIs.
- Continuous Improvement: Contribute to improving deployment practices, monitoring, and long‑term maintainability.
- Operational Accountability: Act as the technical owner of production systems that directly impact live rail operations, ensuring high availability and rapid incident resolution.
Requirements
- Must Haves:
- 4+ years of professional experience with Ruby on Rails.
- Strong understanding of object‑oriented programming and Rails architecture.
- Extensive experience with PostgreSQL, including performance tuning and complex queries.
- Experience with background job processing using Sidekiq and Redis.
- Solid understanding of RESTful API design, JSON serialization, and authentication (e.g., JWT, SSO).
- Hands‑on experience with AWS services and containerised deployments (Docker).
- Experience troubleshooting and supporting production systems.
- Comfortable working within and improving existing codebases.
- Ability to prioritise effectively and manage multiple initiatives.
- Strong written and verbal communication skills in English.
- Experience working in Agile/Scrum environments with Git/GitHub.
- Nice to Haves:
- Experience working with SOAP/XML integrations.
- Experience migrating serverless components (e.g., AWS Lambda) into Rails applications.
- Familiarity with Vue.js to support frontend collaboration.
- Experience working with mobile applications (React Native / Kotlin / Swift).
- Experience working in regulated industries or multi‑client B2B systems.
- Contributions to open‑source Ruby projects or technical blogging.
Benefits
- Private healthcare after your probation (including children)
- Hybrid working model
- 25 days holiday
- Volunteering Leave
- Free flu jab for you and your family
Culture & Operating Principles
We value: Ownership over hierarchy, Clarity over bureaucracy, Impact over job titles. We operate with high autonomy and high accountability. People are expected to raise risks early, communicate clearly, and take responsibility for outcomes.
Interview Roadmap
- Screening Call (30 mins) – Recruiter alignment
- Technical Exercise – Rails architecture & integration discussion
- Final Culture Conversation – Leadership alignment
Guaranteed Interview Scheme
We’re a 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’ll work 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 you indicate this option in your application and your application demonstrates that you meet the essential criteria for the role, you’ll be invited to interview or assessment. Choosing GIS doesn’t guarantee a job offer. If you have any questions, please get in touch.
Mid-Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK) in London employer: Transreport Limited
Transreport is an exceptional employer that champions accessibility and innovation in rail travel, offering a hybrid working model that promotes work-life balance. With a strong focus on employee growth, you will have the opportunity to take ownership of critical backend systems while collaborating with cross-functional teams in a culture that values clarity, impact, and accountability. Enjoy benefits like private healthcare, generous holiday allowances, and a commitment to inclusivity, making it a rewarding place to advance your career in a meaningful way.
StudySmarter Expert Advice🤫
We think this is how you could land Mid-Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK) in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, attend meetups, and engage with online communities. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Prepare for those interviews! Research the company, understand their products, and be ready to discuss how your skills align with their needs. Practise common technical questions related to Ruby on Rails to boost your confidence.
✨Tip Number 3
Showcase your projects! Whether it's a GitHub repo or a personal website, having a portfolio of your work can really set you apart. It’s a great way to demonstrate your coding skills and problem-solving abilities.
✨Tip Number 4
Apply through our website! We love seeing applications come directly from candidates who are excited about our mission. Plus, it gives you a better chance to stand out in the crowd!
We think you need these skills to ace Mid-Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK) in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your Ruby on Rails experience and any relevant projects. We want to see how your skills align with our needs, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter:Your cover letter is your chance to tell us why you’re the perfect fit for this role. Share your passion for B2B SaaS and how you can contribute to our mission of making rail travel accessible for everyone.
Showcase Your Technical Skills:Be specific about your technical expertise, especially with PostgreSQL, AWS, and background job processing. We love seeing concrete examples of how you've tackled challenges in past roles!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it’s super easy!
How to prepare for a job interview at Transreport Limited
✨Know Your Ruby on Rails Inside Out
Make sure you brush up on your Ruby on Rails skills before the interview. Be prepared to discuss your experience with Rails architecture, object-oriented programming, and any specific projects you've worked on. They’ll likely want to hear about how you've tackled challenges in past roles, so have some examples ready.
✨Showcase Your Database Skills
Since PostgreSQL is a must-have for this role, be ready to talk about your experience with performance tuning and complex queries. Think of specific instances where you improved database performance or resolved issues. This will demonstrate your technical expertise and problem-solving abilities.
✨Understand Their Business and Impact
Familiarise yourself with Transreport’s mission to improve accessibility in rail travel. Understanding their vision will help you articulate how your skills can contribute to their goals. Be prepared to discuss how you can enhance their operational systems and support their growth.
✨Prepare for Technical and Cultural Fit
The interview process includes a technical exercise and a culture conversation, so be ready to showcase both your technical skills and your alignment with their values. Think about how you can demonstrate ownership, clarity, and impact in your responses, as these are key principles they value.
