Senior Fullstack Engineer - AI

What you will be working on

• Deliver product features with AI coding agents as the primary implementation loop: write specifications and context-rich tasks that include architecture, team standards, existing patterns, and acceptance criteria; then iterate until the output meets the required bar.
• Review and verify agent-generated code with the same rigor applied to colleague-generated code, catching plausible-but-incorrect output before production.
• Own every feature end-to-end: clarify requirements, understand the problem, own quality and test coverage, deliver to production, and monitor behavior, performance, and regressions after release.
• Improve the team’s shared context, rules, prompts, and guardrails for AI coding agents.
• Conduct code and documentation reviews to ensure quality, share knowledge, and maintain consistency across the codebase.
• Participate in duty rotations by monitoring production systems, responding to incidents, and maintaining service availability.
• Grow technically within a team emphasizing engineering culture, clean architecture, and a high delivery standard.

What we expect from you

• 5+ years of commercial software engineering experience.
• Hands-on experience building production software with AI coding agents, such as Claude Code, Cursor, Codex, or similar tools, including setting context, decomposing work, and validating output. Be ready to describe outcomes, not tool names.
• Practical commercial experience with PHP, Node.js, or Golang.
• Hands-on experience with JavaScript, TypeScript, and React.
• Solid SQL skills and experience with relational databases such as MySQL, PostgreSQL, or similar.
• Working knowledge of Docker for application development and deployment.
• Practical experience with testing methodologies and a clear view of sufficient test coverage.
• At least basic knowledge of DevOps, CI/CD, AWS, and cloud-native solutions.
• Ability to write technical documentation using approaches such as the C4 model and ADRs.
• Strong task decomposition and prioritization skills.
• Fluent written and spoken English.

What we offer

• Flexible working: remote, hybrid, or office options across the US, Poland, Romania, and Ukraine.
• Competitive pay and equity: market salaries, performance bonus, and stock options.
• Growth and learning: courses, conferences, and internal mobility opportunities.
• Health and well-being: health coverage, wellness support, and quarterly Mental Health Days.
• Family-friendly benefits: flexibility for parents, Junior Club, family days, and pet-friendly offices.
• Giving back: donation matching and humanitarian aid.