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Freshflow — Senior Fullstack Engineer (m/f/d) | Berlin

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About Freshflow

€72 billion worth of fresh food is wasted every year in European grocery retail. Freshflow is building the AI Operating System for the Fresh Food Supply Chain — starting with ordering and inventory optimization for fresh produce departments.

We work with some of the largest retailers in Germany and France — EDEKA, REWE, Carrefour, Intermarché, and E.Leclerc — reducing waste by ~24% while improving on-shelf availability. We're growing revenues 400% year-over-year, backed by World Fund and Capnamic, and just getting started.

The Role

You'll work primarily on the Python backend and secondarily on the Flutter mobile app. We are a small team and you will get exposure to every part of our product. This includes ingesting data from customers, processing it, integrating our AI services, and serving it to our customers via our app or into their external systems.

What You'll Work On

Backend

• APIs: Building and maintaining the REST APIs that serve order recommendations to the mobile app and white-label partners, handle order submissions, and those that we use internally.
• Partner integrations: Receiving data and routing finalized orders to supplier systems via different means. Building new integrations as we onboard retail chains.
• Data delivery: Bridging the analytical layer and the mobile app — reading computed recommendations from the warehouse, denormalizing them, and writing them to an operational store the app can sync from.
• Infrastructure: Provisioning and managing the cloud resources these services run on (compute, databases, messaging, secrets).

Mobile App

The primary focus for this role is our backend, but we need you to be able to also contribute to our Flutter mobile app when required. Topics here could include:

• Working on the on-device recommendation adjustment engine and the sync protocol client-side.
• Client-specific adjustments to the order flow.
• Adjusting our app to make it ready for other device types (especially Android Mobile and/or MDE devices used by retail stores).

What We're Looking For

• Strong Python experience. You'll write FastAPI services, Pydantic models, async code, and background workers.
• Experience with PostgreSQL and at least one document database (Firestore, MongoDB, DynamoDB). You'll work with both daily.