Senior Full-Stack Engineer

AgentMaMa; Stockholms kommun; On-site; SEK 900,000 - 1,300,000; Full time

Job summary

AgentMaMa is building AI agents that audit and optimize e-commerce advertising. We ship fast on a modern, strictly-typed stack and offer ownership from Prisma schema to React components, delivering features to customers within days.

You will design and implement end-to-end features in TypeScript across backend and frontend, extend integration workers, and work on AI-driven decisioning with multiple model providers while keeping data pipelines healthy.

Qualifications

• 5+ years building production web apps with TypeScript on server and client.
• Strong PostgreSQL instincts, schema design and migrations.
• Experience with event-driven architectures and queues.
• Habit of writing tests to move fast.
• Pragmatic product sense: ship focused features.

Responsibilities

• Design and build features across our TypeScript monorepo — tRPC procedures and NestJS services on the backend, React on the frontend.
• Extend our integration workers that sync campaign, product, and analytics data from Google and Meta APIs via Cloud Pub/Sub pipelines.
• Work on the AI audit agent: prompt design, rule evaluation, and the plumbing that turns LLM output into reliable, deduplicated actions — across multiple model providers, not just one.
• Help productionize our in-house prediction models: wiring their output into the rule engine and keeping training data and evaluation pipelines healthy.
• Evolve the data model in PostgreSQL/Prisma and keep migrations, multi-tenancy, and role-based access clean as the product grows.
• Own quality: write Jest tests alongside your code, review PRs, and help keep our CI/CD pipeline to Cloud Run fast and boring.

Skills

TypeScript

Testing

Product sense

Pragmatic mindset

Team collaboration

Problem solving

Tools

NestJS

React

PostgreSQL

Pub/Sub

Docker

Job description

We build AI agents that audit and optimize e-commerce advertising. Our platform syncs live data from Google Ads, Meta, Merchant Center, and Google Analytics, runs it through a rule engine, LLM-powered audit agents, and our own prediction models, and turns the findings into concrete actions marketers can apply with one click.

We're a small team shipping fast on a modern, strictly-typed stack. You'd be one of a handful of engineers reporting directly to the CTO, which means real ownership: features you design end-to-end, from the Prisma schema to the React component, ship to customers within days.

What you'll do

About agentmama

We build AI agents that audit and optimize e-commerce advertising. Our platform syncs live data from Google Ads, Meta, Merchant Center, and Google Analytics, runs it through a rule engine, LLM-powered audit agents, and our own prediction models, and turns the findings into concrete actions marketers can apply with one click.

We're a small team shipping fast on a modern, strictly-typed stack. You'd be one of a handful of engineers reporting directly to the CTO, which means real ownership: features you design end-to-end, from the Prisma schema to the React component, ship to customers within days.

What you'll do

• Design and build features across our TypeScript monorepo — tRPC procedures and NestJS services on the backend, React on the frontend.
• Extend our integration workers that sync campaign, product, and analytics data from the Google and Meta APIs via Cloud Pub/Sub pipelines.
• Work on the AI audit agent: prompt design, rule evaluation, and the plumbing that turns LLM output into reliable, deduplicated actions — across multiple model providers, not just one.
• Help productionize our in-house prediction models: wiring their output into the rule engine and keeping training data and evaluation pipelines healthy.
• Evolve the data model in PostgreSQL/Prisma and keep migrations, multi-tenancy, and role-based access clean as the product grows.
• Own quality: write Jest tests alongside your code, review PRs, and help keep our CI/CD pipeline to Cloud Run fast and boring.
  

Our stack

• Backend
• TypeScript · Node.js
• NestJS + Fastify
• tRPC · Zod
• Prisma · PostgreSQL
• Frontend
• React · Vite
• End-to-end types via tRPC
• Infrastructure
• Google Cloud Run · Pub/Sub
• Docker · GitHub Actions
• pnpm workspaces · Turborepo
• AI & integrations
• Multiple LLM providers
• In-house prediction models
• Google Ads · Meta
• Merchant Center · GA4
  

What we're looking for

• 5+ years building production web applications, with strong TypeScript on both server and client.
• Solid relational database instincts — schema design, migrations, and query performance in PostgreSQL (Prisma experience is a plus).
• Experience with event-driven or queue-based architectures (Pub/Sub, SQS, Kafka, or similar) and the failure modes that come with them.
• A habit of testing: you write tests because they let you move faster, not because someone told you to.
• Pragmatic product sense — you ask why before how, and you'd rather ship a focused feature than a perfect abstraction.

Nice to have

• Hands-on work with LLM APIs in production — prompting, evals, structured output, cost control, and switching between providers.
• Applied ML experience: training, evaluating, or serving prediction models alongside product code.
• Familiarity with the Google Ads, Meta, or Merchant Center APIs, or ad-tech / e-commerce domain experience.
• NestJS, tRPC, or GCP (Cloud Run, Artifact Registry, Workload Identity) in a previous role.
  

How we work

Small team, short feedback loops, no ceremony for ceremony's sake. Strict TypeScript, code review on everything, CI that deploys to Cloud Run on merge. We optimize for shipping value to customers weekly and keeping the codebase a place people enjoy working in.