About

• Bit Zesty is looking for a talented Full Stack Software Engineer to join our growing team. Our core stack is Ruby on Rails, but we’re looking for engineers who are excited to work across multiple technologies — including React, React Native, Python, and Elixir — and who embrace AI-assisted development as a core part of their workflow.
• We build high-quality, scalable digital products for public sector organisations, charities, and fast-growing companies. You’ll work closely with our UX designers, project managers, and technical leadership to deliver excellent software that stands the test of time.
• If you love shipping clean, reliable code and want to be part of a team that takes craft seriously, we’d love to hear from you.
• What You’ll Do
• Build and maintain high-quality Rails applications, as well as services in other languages/frameworks where required.
• Use AI tools (Cursor, Claude Code, Droid, etc.) to accelerate high-quality delivery — not replace engineering judgment.
• Contribute to architectural decisions, technical planning, and system design.
• Debug issues, optimise performance, and proactively propose improvements.
• Work with wireframes, mockups, and user stories to deliver well-designed systems.
• Participate in code reviews and foster a culture of engineering excellence.
• Own features end-to-end: from concept, to development, to deployment and monitoring.
• Work across multiple live client projects and handle context-switching confidently.

What We’re Looking For

• Strong Ruby on Rails experience, ideally across multiple production applications.
• Comfortable working in existing codebases and shipping within real-world constraints.
• Experience with SQL (PostgreSQL/MySQL) and some exposure to NoSQL stores.
• Willingness and enthusiasm to work with React, React Native, Python, or Elixir when needed.
• Sound understanding of version control, CI/CD, testing, and deployment pipelines.

We expect you to

• Be excellent at prompting and using LLMs effectively.
• Know when to use Claude, Cursor, etc. — and when not to.
• Understand the difference between AI-assistance and outsourcing your thinking.
• Use AI to enhance speed, quality, reliability, and documentation.
• Have a strong engineering foundation for debugging, algorithms, and systems without relying on LLMs.
• We are not looking for vibe coders. We want thoughtful engineers who use AI as leverage, not a crutch.
• Personal Qualities
• Comfortable collaborating synchronously with a team.
• Excellent attention to detail and communication skills.
• Ability to work across several projects at once.
• Curiosity, adaptability, and a desire to continually learn new tools and technologies.
• Agency experience is a bonus but not required.
• A degree in Computer Science, Software Engineering, or equivalent experience is welcome.

At Bit Zesty, we offer a range of perks and benefits to help you enjoy your time with us, such as

• Fully remote working – work from anywhere in the UK
• Flexibility with working hours (fulltime or part time)
• High-spec equipment (MacBook Air, iPhone, Jabra headset, SAD lamp, etc.).
• 33 days holiday (25 days leave + UK bank holidays + your birthday off).
• Health & wellness contribution for gym or fitness apps
• Conference/training budget
• Private medical insurance
• Regular virtual team activities and a friendly, collaborative culture
• The chance to work on meaningful, impactful digital services used by thousands
• Interested?
• Click “Apply” and send us your CV. We review every application carefully.
• If you’re a talented Rails engineer with strong full-stack instincts and a love of AI-powered development, we’d love to meet you.
• Bit Zesty is an equal opportunities employer. We welcome applicants from all backgrounds.
• All candidates must be eligible to obtain UK Security Clearance (BPSS/SC) and will be required to pass background, identity, and employment checks as part of the onboarding process.