Senior Front- End Engineer (B2B SaaS | 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.

Were hiring a Senior Front-End Engineer to own and scale the front-end layer of a platform used daily in live rail operations.

Strategic Context

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

We operate across the UK Japan and the EU and have supported over 10 million assistance requests for more than 1 million users. We are a Series A company recognised with a Kings Award.

As our platform grows in complexity this role ensures that usability stability and engineering quality scale with it in a live rail environment where failures directly impact real journeys.

Outcomes & Impact

Within 6 months you will:

• Own and deliver complex features end-to-end within one active product stream.
• Confidently drive cases from refinement through to release with minimal supervision.
• Improve accessibility maintainability and test coverage across your area.
• Act as a trusted delivery partner for Product and QA.
• Strengthen code review standards and engineering consistency.

Within 12 months you will:

• Confidently contribute to UK and Global teams based on priority.
• Lead incident response efforts when front-end issues affect production.
• Influence front-end architectural decisions.
• Raise the overall quality bar across our Vue/Nuxt ecosystem.

Tasks

• Own & Deliver: Take full ownership of features from discovery through production release ensuring high-quality and timely delivery.
• Drive Cases & Process: Independently drive development work manage ambiguity and proactively remove blockers without requiring day-to-day direction.
• Accessibility & Standards: Champion accessibility best practices and ensure implementation aligns with inclusive design principles.
• Technical Leadership: Conduct code reviews guide architectural decisions and raise engineering standards across the front-end codebase.
• Incident Response: Lead investigations and resolution efforts during critical production incidents ensuring fast and structured recovery.
• Collaboration: Work closely with Product Design QA and backend engineers to refine requirements and ensure clarity before development begins.
• Continuous Improvement: Contribute to better tooling documentation (e.g. C4 model) CI/CD improvements and development processes.

The Tech Environment:

• Framework: Nuxt 3 (Vue 3 with SSR) Nuxt Auth Nuxt i18n
• Build & Runtime: Vite Nitro
• State Management: Pinia
• Testing: Vitest Vue Test Utils
• Styling: TailwindCSS
• Code Quality: ESLint Prettier
• Tooling: Mocks Server Date FNS Lokalise

You are not expected to know every tool on day one but you should be comfortable mastering complex front-end ecosystems and guiding others in best practices and troubleshooting.

Requirements

Must Haves

• 5 years of experience in front-end development with modern JavaScript frameworks ( React Angular etc.).
• Strong expertise in and modern front-end architecture.
• Proven experience owning and delivering complex features end-to-end.
• Strong knowledge of HTML CSS and TypeScript/JavaScript.
• Experience with state management (Pinia Vuex Redux etc.).
• Experience working within established codebases and improving them.
• Comfortable working with minimal supervision in high-autonomy environments.
• Experience in Agile development environments.
• Familiarity with CI/CD and modern practices such as TDD.
• Ability to prioritise effectively and manage multiple initiatives.
• Strong written and verbal communication skills in English.
• Comfortable working within a remote team.

Nice to Haves:

• Experience implementing designs from Figma/AdobeXD/Sketch with high fidelity.
• Experience working on accessibility-focused or public-facing products.
• Exposure to Ruby on Rails environments.
• Experience with Docker Kubernetes or cloud-native systems.
• Experience working with external product owners or regulated industries.
• Contributions to open-source JavaScript projects or technical blogging.

Benefits

• Private healthcare after your probation (including children)
• Free flu jab for you and your family
• 25 days holiday
• Volunteering Leave
• Cycle and Tech Scheme

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 Front-end architecture & delivery approach
• Final Culture Conversation Leadership alignment

Guaranteed Interview Scheme

Were 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 - well 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 youll be invited to interview or assessment.

Choosing GIS doesnt guarantee a job offer. If you have any questions please get in touch.