Junior Full-Stack AI Engineer

About us

We're mlnative, an AI-first company building our own products that automate document processing across industries — from shipbuilding to HR. We ship real solutions used by real companies, not prototypes. We're early stage and fully self-funded — no VC pressure, no artificial growth targets. Just real products, real customers, and a lot of room to shape how we work.

Who we're looking for

• We need an engineer, not a coder. Your job is to understand the requirements, analyze problems and come up with solutions.

• We're looking for a generalist — not someone bound to a specific tech stack. We're dynamic and flexible, and we expect the same mindset.

• This is an entry-to-mid level position. We don't expect you to know everything — we expect you to grow. We'll invest in your development and expect you to become an expert over time.

• You should be comfortable writing >50% of your code by hand. We use AI tools, but we need someone who understands what they're building, not someone who copies and pastes generated code they can't explain.

• You won't be on your own — our CTO will support you, help you grow, and be there whenever you need guidance.

Contract terms

• Start date: June 2026

• Probationary period: 6 months

• Availability: minimum 120 hours/month up to full-time, depending on your availability

• Work mode: work in our office (Twin Office in Gdynia), later hybrid work

• Equipment: macOS, monitor and all the dev tools needed for this position

• Salary: 5000 - 8000 PLN / month

• Contract: B2B, Umowa Zlecenie

What will you do

• Implement and maintain our new and existing AI solutions.

• Build and evolve full-stack features across our monorepos — from database schema and API routes to interactive React dashboards.

• Integrate LLMs into production workflows using the Vercel AI SDK.

• ~80% of your work will be greenfield — building new things, not maintaining legacy code. That means plenty of opportunity to grow and shape the direction of both the product and the tech stack.

Requirements

• Good knowledge of TypeScript, Node.js and working with LLMs.

• A public GitHub profile that showcases your work or other proof of being able to work on projects independently.

• Experience with full-stack development (REST APIs + modern frontend frameworks).

• Basic knowledge of Unix and Docker.

• Basic understanding of testing principles and CI/CD.

Tech stack

• Runtime & Language: Bun, TypeScript

• Backend: Hono, Vercel AI SDK, Drizzle ORM, PostgreSQL

• Frontend: React, TanStack Router & Query, Shadcn/ui, Tailwind CSS

• Infra & Tooling: Docker, Turborepo, Better Auth

• Observability: OpenTelemetry, Langfuse

Interview process

1. Intro call (30 min) — get to know each other, walk through the role and how we work.
2. Take-home assignment — a small backend + LLM task that mirrors real work (~2-3 hours, on your own time).
3. Review + live coding (60 min) — we walk through your take-home together, then extend it live.
4. Final chat (30 min) — final boss level meeting, cover working style and logistics.