Fullstack Engineer

Spiich Labs AB; Stockholms kommun; On-site; SEK 900,000 - 1,400,000; Full time

Benefits offered by this job

Stock options (QESO)

On-site in Stockholm

Top-tier compensation

Job summary

Spiich Labs AB is an on-site Stockholm-based software company building an agentic platform for sales teams. Reps focus on human work while Spiich agents handle prospecting, lead generation, CRM updates, meeting prep, follow-ups, and everything in between.

The system uses knowledge graphs, memory, and agentic workflows to deliver real help—beyond simple summaries. We hire engineers who thrive in ambiguity, love building scalable features end-to-end, and work across the stack with TypeScript,

Qualifications

• Cracked engineer obsessed with building great software.
• Comfortable with ambiguity, early-stage chaos, and fast iteration.
• 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.

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.

Skills

TypeScript

React

API integrations

Webhooks

OAuth flows

LLMs

Knowledge graphs

Agent systems

Performance

Observability

Tools

Neo4j

PostgreSQL

Node.js

Express

Docker

Google Cloud

Job 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.