Note: The job is a remote job and is open to candidates in USA. Flox is building the next generation of software development lifecycle tooling. They are seeking a product engineer to design, build, and ship the Flox platform, focusing on creating secure software management tools that enhance developer workflows.

Responsibilities

• Design, build, and ship features for the Flox platform—working primarily in Rust, Python, and TypeScript across CLI tools, backend services, and infrastructure
• Own the quality and reliability of what you ship: write tests, review code, make architectural decisions that balance speed with long-term system health
• Write production code using agentic coding tools as your default workflow, focusing on the most complex and ambiguous parts of the system
• Build and maintain AI development infrastructure for the team: harnesses, context engineering (CLAUDE.md, skills, rules files), automated feedback loops, and evaluation frameworks
• Evaluate new agentic development tools and practices as the landscape evolves—run experiments, measure results, and make evidence-based recommendations on what to adopt
• Help engineers across the team develop sophisticated, reliable AI-assisted workflows—document what works, build shared practices, and codify lessons so they compound
• Exercise judgment on when AI agents accelerate real work and when they introduce risk, complexity, or false confidence

Skills

• 5+ years of professional software engineering experience building and shipping production systems
• Production experience with Rust, Python, and/or TypeScript—strong in at least one, comfortable across the others
• Daily use of agentic coding tools (Claude Code, Cursor, Copilot, or similar) as a primary development workflow
• Experience building AI development infrastructure beyond personal use: harnesses, agent skills, automation scripts, evaluation frameworks, or workflows that a team adopted
• Strong engineering fundamentals—architecture judgment, ability to reason about complex codebases, discipline to maintain quality when code generation is fast and cheap
• Clear communication skills and the ability to document workflows and practices in ways other engineers actually use
• Developer tooling, CLI, or infrastructure engineering background
• Familiarity with Nix, NixOS, or reproducible build systems
• Tech lead experience: owning delivery, planning work, leading a team through execution
• Background in software supply chain tooling, package management, or build systems
• Contributions to open-source AI development tooling, skills, or harness frameworks

Company Overview