Intermediate Full Stack Engineer

Role overview

Intermediate Full Stack Engineer at Runn (remote, New Zealand). You’ll deliver end-to-end product work across frontend and backend, with a strong focus on maintainability, performance, user experience, and reliability. You’ll also help boost engineering productivity using AI agents/tools while maintaining quality outcomes.

Responsibilities

• Build and ship customer-facing product experiences
• Deliver polished features across frontend and backend
• Ensure changes are reliable, accessible, and performant
• Own work end-to-end: discovery + technical design through implementation, testing, release, and iteration
• Leverage AI coding approaches; creatively apply AI while protecting quality
• Raise engineering quality: improve patterns, reduce tech debt, strengthen testing, and refine the codebase via reviews and refactoring
• Collaborate effectively in a remote, async environment; write clear updates and communicate via tools like Slack/Linear
• Provide mentoring and feedback and support more junior engineers through pairing and knowledge sharing

Key challenges

• Maintaining a growth mindset in a rapidly changing industry
• Increasing productivity with AI without compromising security, quality, or integrity
• Balancing speed vs. quality in a small team
• Making trade-offs under ambiguity and changing customer needs
• Collaborating across time zones asynchronously
• Keeping high standards for code quality, testing, and maintainability as the team scales

Requirements (Must have)

• 3+ years professional development experience
• Strong experience building production web applications (preferably React + TypeScript)
• Solid fundamentals in modern frontend engineering, including:
  • State management
  • Performance
  • Testing
• Experience with APIs (preferably GraphQL) and relational databases (preferably Postgres)
• Experience using AI coding tools/approaches
• Ability to own work end-to-end and ship iteratively
• Strong communication and collaboration skills in a remote setting
• High standards for code quality, security, testing, and maintainability

Nice to have

• Node.js backend development experience
• Experience defining and operating production infrastructure