Fullstack Engineer

Role description

What you'll do (responsibilities)

• Ship features end-to-end — from the infrastructure that makes AI agents reliable, fast, and scalable to the interfaces reps use daily.
• Own features across the stack: build complete slices — database schema, API, and React UI — and ship them to customers.
• Own integrations end-to-end: design and build integrations with CRMs, email, calendars, and sales tools.
• Reduce latency relentlessly: optimize database queries, implement caching strategies, and eliminate bottlenecks.
• Scale the system: design for horizontal scaling, handle increased load, and maintain <200ms response times.
• Ship fast: test ideas, run experiments, iterate daily on real customer feedback.
• Shape the architecture: make foundational decisions on database structure, API design, and system patterns.

Who you are

• Cracked engineer obsessed with building great software.
• Comfortable with ambiguity, early-stage chaos, and fast iteration.
• Thrive on new tech — LLMs, knowledge graphs, agents, you name it.
• Experience with API integrations, webhooks, OAuth flows, and third-party systems.
• Comfortable across the stack: TypeScript on both sides, React on the front.
• Care deeply about performance, observability, and operational excellence.
• Care more about solving problems than polishing abstractions.
• Fully committed to the mission: not "just a job".

What we offer

• A team of obsessed engineers, full of speed, rigour, and grit.
• Mission-driven, no‑BS culture: experiment, ship, learn.
• Meaningful equity through qualified employee stock options (QESO) from day one.
• Fully on‑site in Stockholm — we believe in working together.
• Top‑tier compensation package.

Technical Stack

• Frontend: React
• Backend: TypeScript, Neo4j, PostgreSQL, Node.js, Express
• Infrastructure: Docker, Google Cloud
• Agent: TypeScript, LLMs (Claude, OpenAI, Gemini), Mastra

About Spiich Labs

Spiich is the agentic platform for sales teams. Reps focus on the human work — building relationships, building trust, and closing deals — while Spiich agents handle everything else: prospecting, lead generation, CRM updates, meeting prep, follow‑ups, and everything in between. The system integrates knowledge graphs, memory, and agentic workflows to deliver real help — not just summarisation or search. We're backed by founders and operators behind Lovable, OpenAI, Tandem Health, and Neo4j.