Overview Tussell is seeking a full‑stack engineer to join our internal engineering team. This is an influential role, offering the successful candidate the chance to join a new team at a pivotal time and have a significant impact on a growing business. You will take part in transitioning our external development model to an in‑house team during the first half of 2026, whilst setting engineering best practices. The role also offers the opportunity to take part in hiring and growing the team, and to unlock the full potential of our market‑leading data. Responsibilities

Design, develop, and maintain robust APIs and backend services using Ruby on Rails. Build and optimise data processing pipelines and automation tools using Python. Implement scalable service‑based architecture and integrate with third‑party services. Ensure code quality through comprehensive testing, code reviews, and documentation. Understand and refactor legacy code while maintaining feature velocity.

Front‑end Development

Develop responsive, interactive user interfaces using React and modern JavaScript. Collaborate with UX/UI designers to implement pixel‑perfect, accessible designs. Optimise frontend performance and ensure cross‑browser compatibility. Build reusable component libraries and maintain design systems.

Release & Deployment

Maintain and enhance the CI/CD pipeline. Create and implement managed data migrations. Drive the move to infrastructure‑as‑code and managed environments. Ensure the apps are secure, highly available and performant.

Architecture & Ecosystem

Ensure that third‑party components and libraries are fit for purpose. Take part in database design and schema enhancements. Identify opportunities to break down monolithic code into discrete services. Lead on leveraging the capabilities of ML & LLMs to enhance our data architecture.

Technical Leadership

Set standards while we transition to a small in‑house team. Mentor junior developers and provide technical guidance across projects. Participate in architectural decisions and technology roadmap planning. Lead code reviews and champion best practices for development workflows. Contribute to technical documentation and knowledge sharing initiatives.

Collaboration & Delivery

Work closely with product managers, designers, and other engineers in an agile environment. Break down complex features into manageable tasks and deliver high‑quality solutions on time. Participate in on‑call rotations and troubleshoot production issues as needed. Continuously evaluate and recommend new technologies and tools.

Experience & Skills

5+ years in full‑stack development, ideally with Ruby on Rails, Python, PostgreSQL, and React. Comfortable shipping and maintaining live, data‑rich products. Technical leadership capability and the ability to influence technical direction. Player‑coach mindset – writing code, solving hard problems, and helping others improve. Process‑oriented, improving and standardising engineering practice. Commercially‑minded, prioritising engineering choices that affect cost, product delivery and customer outcomes. Real‑world experience with live systems, bug fixing, user response and decision‑making under pressure. Excited by the challenge of building from within and setting the direction for a growing company.

Company Founded in 2015, Tussell is a founder‑led and investor‑backed tech scale‑up based in London. Our product powers better commercial decisions about the UK public sector by collating open data on public contracts and expenditure and transforming it into decision‑ready data. Over the last decade, Tussell has become the market’s trusted source by being data‑first with a competitive edge expressed through the richness and reliability of our data. Benefits

Hybrid working. Annual leave of 25 days (not including public holidays), rising by one day per year up to a cap of 30 days. A vibrant office in Shoreditch with free weekly perks. An annual personal learning & development budget. Team socials in central London at least once per quarter, plus a summer and Christmas party. The latest tech – Apple MacBooks are standard issue. Company pension scheme with employer contribution of 3%. Cycle to Work Scheme – tax savings on cycling equipment via salary sacrifice. An annual wellbeing budget of £200 (prorated).

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