Fullstack Engineer – Next.js & Python – AI-Driven Customer Platform (€80k)

Fullstack Engineer – Next.js & Python – AI-Driven Customer Platform (€80k)

Join a fast-growing ClimateTech company on a mission to accelerate the energy transition by building software that helps make sustainable heating accessible to every household.

You’ll be developing a modern customer portal and automation ecosystem that supports the installation of heat pumps across Germany. This is a highly practical product role where your work will directly improve both the customer experience and the operational efficiency of a rapidly scaling business.

Why this role stands out

• Build software that has a tangible impact on the energy transition
• Work on a modern platform combining Next.js, React, Python and FastAPI
• Use AI-assisted development tools and help integrate AI-driven automation into real products
• Own features end-to-end - from architecture through to deployment
• Join a high-growth environment with real ownership and minimal bureaucracy

What you’ll do

• Develop and enhance a customer portal used throughout the heat pump journey
• Build scalable backend services and APIs with Python and FastAPI
• Integrate with systems such as Salesforce and other enterprise platforms
• Design software that automates complex operational workflows
• Work closely with product, engineering and operations teams

Tech environment

• Next.js, React
• Python, FastAPI
• REST APIs, OAuth2, JWT, Docker
• Heavy use of AI-assisted development tools

What they’re looking for

• 3+ years of experience building modern web applications
• Strong frontend skills with Next.js and React
• Solid backend understanding with Python and APIs
• Comfortable working in a fast-paced, ownership-driven environment

Interviews are starting soon, so apply now to secure your slot.

Next.js | React | Python | FastAPI | Fullstack Engineer | AI Automation | ClimateTech | Customer Portal | Salesforce Integration | Berlin | Hybrid