Python Developer

About haseln haseln helps B2B companies across the DACH region start conversations with the right decision-makers. We combine outbound sales with our own technology and work with startups as well as established mid-sized companies. We’re a small team, growing fast.

The role

Python powers much of what we build. You’ll develop the backend systems, data pipelines and automations behind our in-house products.

What you’ll do

• Build and maintain backend services and APIs in Python.
• Develop data pipelines that collect, clean and enrich data.
• Integrate third-party systems and automate workflows.
• Build LLM-powered features together with the team.
• Keep our code simple, tested and easy to extend.

You’re a fit if

• You have solid experience with Python (FastAPI, Django or similar).
• You’re comfortable with SQL databases such as PostgreSQL.
• You’ve worked with APIs, scraping or data processing.
• You use AI tools in your daily work and ship fast.
• You speak good English. German is a plus.

You’re probably not a fit if

• you need detailed specs before you get started.
• you prefer polishing code to shipping it.