LLM-Powered AI Engineer: Integrated Workflows

Digital Fans AB; Stockholms kommun; On-site; SEK 600,000 - 900,000; Full time

Job summary

Digital Fans AB in Stockholm is seeking an AI Developer to build LLM-powered features and agent workflows that move beyond experiments and integrate with clients' data and tools.

You will work with senior leadership and designers to turn ideas into reliable, production-ready AI solutions using Mastra and a TypeScript-based stack. The role emphasizes practical problem solving, data integration, and continuous improvement in a fast-moving AI landscape.

Qualifications

• 2+ years of professional software development experience.
• Strong experience with TypeScript and Node.js.
• Hands-on experience building LLM-powered features or applications.
• Experience with prompt design, tool calling, structured outputs and streaming.

Responsibilities

• Build LLM-powered features and agent workflows.
• Develop tools, memory, multi-step orchestration and human-in-the-loop flows.
• Integrate models from OpenAI, Anthropic, Google and other providers.
• Connect agents to client data sources, CRMs, content platforms and marketing tools.
• Build RAG pipelines and work with embeddings, retrieval and context.
• Develop integrations that connect AI capabilities with existing systems and workflows.
• Build product experiences around AI capabilities with fullstack developers and designers.
• Develop evals, monitoring and feedback loops to measure and improve AI behavior.
• Prototype new ideas quickly and turn successful concepts into robust production services.
• Continuously explore new capabilities across the AI/agent ecosystem.
• Work closely with leadership to turn direction into working solutions.
• Share learnings and contribute to how the wider team builds with AI.

Skills

TypeScript

Node.js

LLM-powered features

Prompt design

Tool calling

Embeddings/RAG

APIs integration

Mastra familiarity

Tools

Mastra

OpenAI API

Claude Agent SDK

LangGraph

Vercel AI SDK

Bedrock AgentCore

Job description

Digital Fans AB in Stockholm is seeking an AI Developer to build LLM-powered features and agent workflows that move beyond experiments and integrate with clients' data and tools.

You will work with senior leadership and designers to turn ideas into reliable, production-ready AI solutions using Mastra and a TypeScript-based stack. The role emphasizes practical problem solving, data integration, and continuous improvement in a fast-moving AI landscape.