At a Glance
- Tasks: Own and evolve backend systems using Ruby on Rails to enhance rail travel accessibility.
- Company: Join a Series A tech company making rail travel accessible for everyone.
- Benefits: Enjoy private healthcare, hybrid work, 25 days holiday, and volunteering leave.
- Other info: Dynamic culture valuing ownership, clarity, and impact with excellent career growth opportunities.
- Why this job: Make a real impact on live rail operations while working with cutting-edge technology.
- Qualifications: 4+ years of Ruby on Rails experience and strong understanding of backend systems.
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 platform.
- 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.
Responsibilities
- 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.
- Deep Dive Interview – Engineering & Product.
- Final Culture Conversation – Leadership alignment.
We aim to complete the process within 4 weeks.
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
Transreport is an exceptional employer that champions accessibility in rail travel, offering a dynamic work culture where innovation and collaboration thrive. With a hybrid working model, generous benefits including private healthcare and volunteering leave, and a commitment to employee growth, we empower our team to take ownership and make a meaningful impact in the industry. Join us in London and be part of a forward-thinking company that values clarity, accountability, and the drive to remove barriers for all travellers.
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 work! If you’ve got a GitHub profile or any side projects, make sure to highlight them. This gives potential employers a glimpse of your coding style and problem-solving abilities.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team and contributing to our mission.
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 🫡
Show Off Your Ruby Skills:Make sure to highlight your experience with Ruby on Rails in your application. We want to see how you've used it in real-world scenarios, so don’t hold back on those juicy details!
Be Clear and Concise:When writing your application, keep it straightforward. We appreciate clarity over fluff, so get to the point while showcasing your skills and experiences that align with the role.
Tailor Your Application:Don’t just send a generic application! Tailor it to our job description by mentioning specific projects or experiences that relate to the responsibilities we’ve outlined. It shows us you’re genuinely interested.
Apply Through Our Website:We encourage you to apply through our website for a smoother process. It helps us keep track of applications and ensures you don’t miss out on any important updates from us!
How to prepare for a job interview at Transreport
✨Know Your Ruby on Rails Inside Out
Make sure you brush up on your Ruby on Rails knowledge before the interview. Be prepared to discuss your experience with Rails architecture, object-oriented programming, and any specific projects you've worked on. This will show that you’re not just familiar with the framework but can also apply it effectively in real-world scenarios.
✨Showcase Your Problem-Solving Skills
Since the role involves stabilising key third-party integrations and resolving production issues, be ready to share examples of how you've tackled similar challenges in the past. Discuss your approach to troubleshooting and how you ensure system reliability, as this will demonstrate your ability to handle operational accountability.
✨Familiarise Yourself with Their Tech Stack
Take some time to research the technologies mentioned in the job description, such as PostgreSQL, Sidekiq, Redis, and AWS. Being able to speak confidently about these tools and how you've used them in previous roles will give you an edge and show that you're genuinely interested in the position.
✨Prepare for Cross-Functional Collaboration Questions
As the role requires working closely with Product and Platform teams, think of examples where you've successfully collaborated with other departments. Highlight your communication skills and how you’ve contributed to delivering robust APIs or improving deployment practices, as this aligns with their emphasis on teamwork and impact.
