Fullstack Engineer (f/m/d)

What We Do

Build the AI-native energy supplier of the future

Energy markets are volatile, complex, and still running on outdated systems. At Zeus Energy, we are creating the first AI-native full-stack energy supplier—a digital-first platform that helps businesses buy, manage, and optimize their energy with intelligence, speed, and transparency.

We are backed by Merantix, Europe’s leading AI venture studio. Joining Zeus at this early stage, you’ll take ownership from day one while benefiting from the resources, network, and stability of a proven venture platform.

Your role

We are looking for a Fullstack Engineer who wants to make a real impact by building our MVP and shaping our core technology:

• Build features end-to-end across frontend (React/Next.js), backend (Node.js/TypeScript), and database (PostgreSQL)
• Design scalable architecture in a modern monorepo setup
• Collaborate directly with founders, product, and early customers
• Debug, refactor, and iterate quickly to keep our platform robust and fast
• Take responsibility for technical decisions that set the foundation for scal

Your profile

2+ years of experience building production-grade fullstack applications
Strong skills in Node.js and TypeScript
Proficient with modern frontend frameworks (React, Next.js)
Solid database knowledge (PostgreSQL or similar)
Comfortable working across the full stack and eager to take ownership
Pragmatic, solution-driven, and motivated by solving real-world problems in energy and climate
Fluent in English (our team language); German a plus
Expertise in workflow automation and agent frameworks (e.g., n8n, LangGraph) is a strong asset

What We Offer

Impact: Build the foundation of an AI-native energy supplier at a decisive stage
Stability: Backed by Merantix’s venture studio and AI ecosystem
Growth: Direct exposure to startup building, AI adoption, and energy markets
Culture: Small, ambitious team with ownership, speed, and collaboration
Tech: Greenfield setup with modern stack—minimal tech debt
Compensation: Competitive salary + ESOP participation
Work model: Based at the AI Campus Berlin; hybrid flexibility possible

About Us

We are an equal-opportunity employer and value diversity. We consider all applications equally regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, or gender identity. We strongly encourage individuals from groups traditionally underrepresented in tech to apply.