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Senior Fullstack Engineer

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Location:
Czechia , Brno ▼

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

Senior Full-stack Product Engineer role at an AI-first company focused on transforming product development through AI-native workflows. The engineer will shape AI agent architecture, workflows, and evaluation systems.

Job Responsibility:

  • Take full ownership of features and platform capabilities, working across backend (Python/Kotlin) and frontend (React/TypeScript) layers to deliver end-to-end solutions
  • Lead the delivery of complex or ambiguous full-stack projects, breaking down problems, scoping technical work, and shipping iteratively
  • Work primarily in Python and Kotlin-based services to build reliable, scalable, and maintainable internal systems
  • Contribute to platform-wide efforts like authentication, permissions, notifications, and shared UI patterns
  • Collaborate with product managers and designers to define technical solutions that balance speed, scope, and user experience
  • Write high-quality, well-tested code across both frontend and backend codebases
  • Mentor junior and mid-level engineers through pairing, design reviews, and technical feedback
  • 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

Requirements:

  • 5+ years of professional engineering experience
  • 4+ years of professional experience building and maintaining production systems at scale
  • Strong backend development skills in Python, Kotlin, or Java, with experience designing and evolving service-level logic and infrastructure
  • Working proficiency in React and TypeScript, with the ability to contribute meaningfully to frontend implementation and UX polish
  • Proven ability to own features end-to-end across backend and frontend systems
  • Experience delivering projects iteratively in cross-functional teams
  • Familiarity with tools like PostgreSQL, Kafka, GraphQL, and AWS
  • Experience mentoring other engineers and helping uplift team-wide engineering quality
  • Clear communication skills - especially when explaining technical trade-offs and collaborating across functions
  • A pragmatic, product-focused mindset - you care about delivering impact, not just elegant code
  • 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

Nice to have:

  • Experience building AI agents, with familiarity with frameworks such as Pydantic AI, LangGraph, AutoGen, or CrewAI
  • Curiosity to explore AI-based tooling for accelerating backend/frontend development or automation
What we offer:
  • Stock options
  • MacBook + 34″ monitor
  • Budget for online courses, books, and conferences
  • 5 weeks of vacation + 9 sick days
  • Volunteer Days for you to help causes close to your heart
  • Carrot Fertility Benefits
  • Free snacks, drinks, and yummy catered lunches
  • MultiSport card to access sports facilities
  • Flexible working hours and home office
  • Parental benefits
  • Language lessons
  • Mental Wellness Program to support your well-being and self-care
  • Relocation bonus ranging from $6,000 to $13,000 USD

Additional Information:

Job Posted:
March 13, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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