Founding Software Engineer Job at Finna AB | Stockholm, Sweden

Finna is building a personal cloud computer (Matrix) for the AI-agent era: a persistent environment where people can run coding agents, tools, applications, and long-running work without tying everything to one laptop. We are looking for a Founding Software Engineer to join Finna AB in a full-time role based in Stockholm, with flexibility to work remotely within Sweden.

• Develop and maintain software across backend systems, infrastructure, and user-facing product surfaces.
• Own technical work from architecture and implementation through testing, deployment, monitoring, and iteration.
• Build reliable systems for persistent AI-agent sessions, cloud computers, terminals, files, applications, and realtime communication.
• Work with TypeScript services, Linux environments, PostgreSQL, APIs, realtime protocols, and modern web technologies.
• Investigate and resolve technical and operational problems.
• Improve system security, reliability, performance, observability, and maintainability.
• Work closely with users and the founding team to turn product needs into durable technical solutions.
• Contribute to technical direction, engineering practices, and product decisions.

• Demonstrated experience building and shipping substantial software products or systems.
• Strong software engineering fundamentals, including APIs, data modelling, testing, debugging, and system design.
• Strong TypeScript skills and comfort working with Linux and PostgreSQL.
• Ability to work across backend infrastructure and user-facing product code.
• Good judgment around security, reliability, permissions, and data protection.
• High ownership and the ability to take work from an initial problem through production.
• Clear written and spoken English.
• Ability to work with substantial overlap with European working hours.