Senior Full-Stack Engineer

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

Job summary

AgentMaMa is hiring a senior engineer to design and build features across a TypeScript monorepo, connecting backend NestJS services with a React frontend. You will extend data pipelines from ad platforms and contribute to AI audit agents, while productionizing in-house prediction models and maintaining clean Prisma-based data models.

Join a small, fast-moving team reporting to the CTO, delivering end-to-end ownership from schema to customer impact.

Qualifications

• 5+ years building production web applications with strong TypeScript on both server and client.
• Solid relational database instincts — PostgreSQL, migrations, and query performance.
• Experience with event-driven or queue-based architectures (Pub/Sub, SQS, Kafka) and failure modes.
• Habit of testing and shipping features quickly through reliable tests (Jest).
• Pragmatic product sense; prefer delivering focused features over deep abstractions.

Responsibilities

• Design and build features across our TypeScript monorepo — tRPC procedures and NestJS services on the backend, React on the frontend.
• Extend integration workers that sync data from Google and Meta APIs via Cloud Pub/Sub pipelines.
• Work on the AI audit agent: prompt design, rule evaluation, and turning LLM output into reliable actions across providers.
• Help productionize in-house prediction models and wire output into the rule engine.
• Evolve the data model in PostgreSQL/Prisma, manage migrations, multi-tenancy, and access control.
• Own quality: write tests (Jest), review PRs, and maintain CI/CD to Cloud Run.

Skills

TypeScript (server & client)

PostgreSQL experience

Testing / Jest

Tools

NestJS

Fastify

tRPC

Zod

Prisma

PostgreSQL

Docker

GitHub Actions

pnpm

Job description

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.