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API and Interface Developer (m/f/d) in Cologne Startup

GreenPocket GmbH

Full time Mid

📡 Cologne 🏙 Cologne, North Rhine-Westphalia 📅 Dec 31, 1969 ⏳ Closes Jul 28, 2026

💰 US$70,000 – US$80,500 USD/yr

📋 Job Description

GreenPocket GmbH is seeking an API and Interface Developer to enhance their Kotlin-based API middleware and improve integration capabilities. The role involves maintaining REST and MQTT interfaces, developing connectors to external APIs, and participating in new integration features and standards. Candidates should possess a degree in computer science, experience with Kotlin and Linux, and strong skills in API design and integration.

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HIRING COMPANY:

GreenPocket GmbH

📡 Cologne

GreenPocket GmbH is an agile, green startup specializing in energy management and visualization software, committed to shaping a sustainable, climate-neutral future. Our mission is to simplify energy consumption management with intuitive, AI-driven software, making it accessible for everyone, from businesses to househo…

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⏳ Closes Jul 28, 2026