At a Glance
- Tasks: Own and evolve backend systems, ensuring stability and reliability in live rail operations.
- Company: Award-winning tech company focused on accessibility in rail travel.
- Benefits: Private healthcare, hybrid work model, 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 55000 - 65000 € per year.
B2B SaaS | Hybrid – 2-3 days office | UK
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.
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
- 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: MindMatch
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, we provide opportunities for professional development and encourage autonomy within a collaborative culture. Our commitment to inclusivity is reflected in our Disability Confident status, ensuring a supportive environment for all team members.
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 Ruby on Rails communities. You never know who might have a lead on that perfect job!
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your Ruby on Rails projects. This is your chance to demonstrate your expertise and make a lasting impression on potential employers.
✨Tip Number 3
Prepare for those interviews! Brush up on your technical knowledge and be ready to discuss your experience with PostgreSQL, AWS, and CI/CD processes. Practice common interview questions to boost your confidence.
✨Tip Number 4
Apply through our website! We love seeing applications 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 🫡
Show Your Passion for Ruby on Rails:When writing your application, let us know why you love working with Ruby on Rails. Share specific projects or experiences that highlight your skills and enthusiasm for the framework. This helps us see your genuine interest in the role!
Tailor Your Application:Make sure to customise your application to reflect the job description. Highlight your experience with PostgreSQL, background job processing, and AWS services. We want to see how your skills align with what we're looking for!
Be Clear and Concise:Keep your application straightforward and to the point. Use clear language and avoid jargon where possible. This makes it easier for us to understand your qualifications and experience without getting lost in the details.
Apply Through Our Website:We encourage you to submit your application through our website. It’s the best way for us to receive your details and ensures you’re considered for the role. Plus, it’s super easy to do!
How to prepare for a job interview at MindMatch
✨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. This will show that you not only understand the framework but can also apply it effectively in real-world scenarios.
✨Showcase Your Problem-Solving Skills
Since the role involves maintaining and improving operational systems, be ready to share examples of how you've tackled production issues in the past. Discuss your approach to troubleshooting and how you’ve optimised performance, especially with PostgreSQL and background job processing using Sidekiq and Redis.
✨Familiarise Yourself with Their Tech Stack
Take some time to research the technologies mentioned in the job description, like AWS services and CI/CD processes. If you have experience with Docker or serverless components, be sure to highlight that. Showing that you’re comfortable with their tech stack will give you an edge.
✨Emphasise Collaboration and Communication
This role requires working closely with cross-functional teams, so be prepared to discuss your experience in Agile/Scrum environments. Share examples of how you've collaborated with frontend and mobile engineers to deliver robust APIs, and highlight your communication skills, as they are crucial for success in this position.
