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September 5, 2026

Full Stack Engineer

Mid • Remote

Warsaw, MZ, Poland

About the Project

Over 5 billion people use basic applications like email, notes, and tasks that were not built as AI-native tools. The project aims to build a proactive smart assistant for everyday users, bringing intelligence to conversations, errands, organization, and daily workflows with minimal prompting.

The product focuses on high reliability for long-running workflows, persistent context, and real-world task completion. Key challenges include multi-step reasoning, external tool integration, and model predictability, with a goal of helping users complete daily tasks in significantly less time.

Role & Key Responsibilities

As a Full Stack Engineer – AI Systems, you will build the product layer that turns foundational AI capabilities into dependable, production-grade applications.

  • End-to-End Product Engineering: Build features across the frontend, backend, and AI integration layers.
  • Agent Architecture: Design agent workflows that effectively handle multi-step planning, tool execution, failure modes, and self-recovery.
  • Real-time AI Interactions: Engineer responsive systems utilizing streaming, partial results, and tight latency constraints.
  • System Reliability & Observability: Integrate LLMs, memory, and third-party tools into systems that perform consistently under real-world conditions.
  • Continuous Iteration: Build robust fallback mechanisms and continuously improve system success rates based on evaluation metrics and user telemetry.

What We Are Looking For

  • Strong full-stack experience building end-to-end features across frontend and backend stacks.
  • Solid understanding of API architecture, data flow, and distributed-system fundamentals.
  • Hands-on experience working with LLMs, RAG architectures, or AI-powered features in production.
  • Ability to take feature ownership from initial concept through design to production deployment.
  • Comfort making clear engineering choices in fast-moving, evolving environments.

Tech Stack

  • Frontend / Backend: Next.js, Node.js, Python
  • AI & Machine Learning: PyTorch, OpenAI, Anthropic, open-source LLMs
  • Data & Infrastructure: SQL and NoSQL databases, Docker, Kubernetes

What We Offer

  • Stable employment with standard statutory benefits.
  • Complete flexibility to work from anywhere.
  • Opportunity to shape an AI-native product reaching global scale.
  • High autonomy, low friction, and quick decision-making.

Interview Process

  • Online Coding Assessment: Practical skills validation.
  • HR Interview: Introductory chat to align on background and expectations.
  • Technical Interview: Deep dive into system design, full-stack architecture, and AI concepts.
  • Founder Interview: Final alignment on vision, culture, and high-level execution.

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