Full Stack Engineer

Giving a machine a memory worth the name is harder than it sounds.

That's a big part of what we're building at Siv, an AI assistant for Swedish small and medium-sized companies. It lives in the tools teams already use, remembers context, and handles the follow-up and admin that quietly eats up a big chunk of everyone's week. Sweden first, with the rest of Europe within reach.

We keep the team small and the bar high. We're looking for a strong fullstack developer to join the founding team, someone who could run their own thing and would rather build this. Early but real: financing is in place, customers are signed, and the technical foundation is solid. The work is hands-on with LLMs, RAG and MCP in production, and you'd help shape large parts of how the product gets built.

Get this right and Siv becomes part of how thousands of companies across Europe work every day.

Responsibilities

• Build the product end to end, from interface to backend and infrastructure
• Work hands-on with LLMs, RAG pipelines and MCP in production
• Connect external services and handle sensitive company data under European law
• Own technical decisions from the start

We build with TypeScript on the Bun runtime and the Elysia web framework, a React frontend (a straightforward Vite SPA), and Rust for niche pieces like our document parser and internal tooling. TypeScript is what we'd want you strongest in; the rest of the stack you can pick up here.

Qualifications

• Strong TypeScript, or comparable typed-language depth that transfers fast
• Solid fullstack experience and a track record of shipping products to production
• Comfortable building with LLMs, RAG and similar tooling
• Experience with devops and/or cybersecurity is a plus
• Confident making your own calls and driving work in a small team

On-site in Gothenburg. We hire on an ongoing basis and bring in the right people as we find them.