Backend Engineer: AI Agents & API Orchestration (Python)

Greenstep Sverige AB; Espoo; Hybrid; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Flex benefit and lunch discount

Together bonus: 10% of annual OP

Greenstep Academy training

Ergonomic offices

Job summary

Greenstep is expanding with a Backend Engineer role focused on building AI-enabled backend services and agent orchestration. You will design, implement, and deploy Python/FastAPI backends, exposing REST APIs and agent workflows, while collaborating with data and frontend teams.

The role emphasizes ownership, testing, and scalable architecture, in a Finnish-speaking environment. The position is hybrid and located in Espoo or Vantaa, Finland, with a strong emphasis on building with

Qualifications

• 3+ years professional Python backend development, including async programming.
• OOP and clean service architecture.
• REST API design with FastAPI.
• ORMs & migrations (SQLAlchemy, Alembic).
• Practical AI agent building — LangChain, LangGraph.
• Testing discipline: unit/integration/API tests, mocking LLM calls.
• Docker (containerization; no orchestration ownership).
• Effective use of AI coding tools without losing engineering judgment.
• Basic CI familiarity.
• Excellent English; Finnish preferred.

Responsibilities

• Design and develop backend services and REST APIs in Python/FastAPI, including agentic workflows built with LangChain and LangGraph.
• Build and expose tools/agents via MCP (FastMCP).
• Build features and APIs on top of consolidated semantic-model and gold-layer data.
• Design database schemas and migrations (SQLAlchemy & Alembic).
• Write asynchronous, production-grade Python, with solid test coverage including mocking LLM/agent calls.
• Containerize services with Docker for local dev and deployment.
• Instrument agent behavior with real observability.
• Use AI coding tools to move faster with engineering judgment.

Skills

Python backend

Async programming

REST API design

FastAPI

OOP/architecture

SQLAlchemy

Alembic

LangChain

LangGraph

Docker

CI

English

Finnish (pref.)

Tools

Power BI

Microsoft Fabric

Job description

Greenstep is expanding with a Backend Engineer role focused on building AI-enabled backend services and agent orchestration. You will design, implement, and deploy Python/FastAPI backends, exposing REST APIs and agent workflows, while collaborating with data and frontend teams.

The role emphasizes ownership, testing, and scalable architecture, in a Finnish-speaking environment. The position is hybrid and located in Espoo or Vantaa, Finland, with a strong emphasis on building with