Senior Backend Engineer - AI Agents - Climate Tech (all genders)

As a Senior Backend Engineer - AI Agents, you will shape how AI is used in our Corporate Carbon Footprint (CCF) and Product Carbon Footprint (PCF) workflows. Your focus is on building reliable, production-grade LLM-based systems and integrating them cleanly into our backend architecture.

• Designing and implementing agent-based LLM systems (tool calling, orchestration)
• Applying RAG to ground AI outputs in internal data
• Defining evaluation, quality control patterns and uncertainty signals for AI-generated results (e.g. LLM-as-a-judge)
• Combining AI-driven logic with rule-based mechanisms for reproducibility
• Making informed trade-offs between accuracy, cost, latency and reliability in production

This role creates positive change by helping companies reduce emissions faster through AI-driven carbon accounting solutions, contributing meaningfully to fighting the climate crisis.

• 5+ years of experience in backend software development
• Strong Python skills
• Proven track in agent development in a professional environment
• Strong familiarity with agent frameworks, technologies and techniques (RAG, tool-calling, function-calling, agent design patterns)
• Experience balancing performance, cost and accuracy in production environments
• Fluent in English, clear written and verbal communication (German is a plus)
• You live in the EU (CET ±1) with a valid work permit
• You are passionate about the fight against the climate crisis and creating customer-oriented solutions that deliver real added value
• Startup or scale-up experience

• Fair compensation (first order of magnitude: around € 70,000 - 80,000 gross depending on experience)
• 28 vacation days and flexible vacation planning
• Flexible working hours - family-friendly
• 100% remote is possible - work from your preferred location
• Freedom to contribute to the open source community
• Teamevents
• Creating long-lasting software with a positive impact
• Play a decisive role in shaping our product and corporate culture
• A mission that drives us every day

Global Changer is a climate tech company focused on helping companies reduce emissions faster through their SaaS B2B platform for carbon accounting (Corporate Carbon Footprint and Product Carbon Footprint). They work mainly with large organizations and are backed by well-known investors.