Senior Frontend Product Engineer (JS/React)
What you will do
- Make our codebase AI-ready: define clear module boundaries, improve API contracts, add semantic context, and build the structured documentation that makes AI agents more effective across every repo.
- Design and implement agent workflows that go beyond chat: multi-step reasoning, tool use, autonomous task execution, and human-gated checkpoints.
- Run experiments, validate with real users, and iterate based on evidence. We measure learning velocity, not just output.
- Collaborate closely with product managers and designers to shape what we build, not just how we build it. We expect a product mindset, not just technical execution.
- Act as a knowledge multiplier, sharing what you learn across and beyond your team to raise the bar for everyone.
About you
- 5+ years of experience building web apps.
- Experience with single page applications built with JavaScript and React.
- Experience with our favorite approaches and frameworks is always welcome (TypeScript, Continuous and Progressive Delivery with Feature Flags).
- A solid understanding of functional programming principles.
- Confident designing frontend architecture and passionate about performance.
- Experience mentoring and helping teammates, doing code reviews and pair-programming.
- Drive to have the editor and tooling set up perfectly.
- The initiative to fix something that's broken, rather than waiting for someone else to do it.
- Able to win a debate on tabs vs. spaces conducted entirely in English.
- Bring product thinking to engineering work. You can articulate why something matters for users, not just how it works technically.
- Embrace AI as a daily tool in your own workflow. You use AI coding assistants, iterate on prompts, and constantly look for ways to move faster.
- Are curious about what agent native architecture looks like: how to structure codebases, APIs, and documentation so AI agents can operate effectively at scale.
Our tech stack
- Frontend: TypeScript, React.js
- Backend: TypeScript/Node.js, Ruby, Kotlin, Kafka
- Storage: Postgres, Elastic, Redis
- Data Pipeline: Python, Keboola, Looker, Snowflake
- Infrastructure: AWS, Kubernetes, Terraform
- Business tools: Slack, Jira, Google suite, Zoom, Notion
Our Benefits Include
- Stock options
- MacBook
- Budget for online courses, books, and conferences
- 5 weeks of vacation + sick days
- 1 Volunteer Day per year for you to help causes close to your heart
- Team events, such as off-sites and retreats
- Shared Headspace account for mindfulness & mental health
- Language lessons
- Mental Wellness Program to support your well-being and self-care
- Opportunity to travel to San Francisco
Relocation Opportunities
If joining us means making a move, we’re here to help make that transition easier. Candidates must have the legal right to work in the EU. While we are unable to provide visa sponsorship for this role, we’re happy to support relocation to Prague for candidates already authorized to work in the EU.
We offer a one-time relocation bonus ranging from $6,000 to $13,000 USD, depending on your personal situation, whether you’re moving on your own or with a partner or family. This bonus is intended to help offset moving expenses and support your transition into your new city. While it may not cover every cost, it provides meaningful financial support as you get settled.
