> Markdown version of [/jobs/ext/2792916-senior-ruby-on-rails-engineer-b2b-saas-hybrid-uk](https://www.wearedevelopers.com/jobs/ext/2792916-senior-ruby-on-rails-engineer-b2b-saas-hybrid-uk). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK) - **Company:** Transreport Limited - **Location:** Greater London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Amazon Web Services, User Authentication, Code Coverage, Continuous Integration, Data Integrity, Data Security, Serialization, Database Queries, Mobile Application Software, JSON, PostgreSQL, Object-Oriented Software Development, Open Source Technology, Performance Tuning, Ruby on Rails, Redis, Ruby, Simple Object Access Protocol (SOAP), Systems Integration, Extensible Markup Language (XML), System Availability, Database Performance, AWS Lambda, Backend, Vue.js, Kotlin, Code Testing, Operational Systems, React Native, Front End Software Development, Restful APIs, Serverless Computing, Docker - **Published:** September 8, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840635943-senior-ruby-on-rails-engineer-b2b-saas--hybrid--uk ## About the Role * 5+ 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 usingSidekiqand 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. * 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. * 25 days holiday * Free flu jab for you and your family We value: * Clarity over bureaucracy Weoperatewith high autonomy and high accountability. People are expected to raise risks early, communicate clearly, and take responsibility for outcomes. ## Description We are hiring a Senior Ruby on Rails Engineer to own and evolve our operational systems, ensuring stability and production reliability in close collaboration with cross-functional teams., * 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., * Own & Evolve Backend Systems:Maintainand 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 tomaintainsystem 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 directlyimpactlive rail operations, ensuring high availability and rapid incident resolution. ## Related Videos - [Coffee with Developers: David Heinemeier Hansson](https://www.wearedevelopers.com/videos/875-coffee-with-developers-david-heinemeier-hansson) - [Recruitment Reinvented: Bold strategies and the $10K signing incentive](https://www.wearedevelopers.com/videos/1068-recruitment-reinvented-bold-strategies-and-the-10k-signing-incentive) - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Fireside Chat with David Heinemeier Hansson](https://www.wearedevelopers.com/videos/980-fireside-chat-with-david-heinemeier-hansson) - [Coroutine explained yet again 60 years later](https://www.wearedevelopers.com/videos/690-coroutine-explained-yet-again-60-years-later) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Best Companies to work for in London: Top 25 Companies in 2023](https://www.wearedevelopers.com/magazine/187-best-companies-to-work-for-in-london-top-25-companies-in-2023) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk)