Software Engineer - Fullstack & AI (m/w/d)

Deine Aufgaben

• End-to-End Feature Development:You build and own product features from scratch, moving confidently between our backend (Kotlin/Spring Boot) and frontend (React)
• AI Implementation:You are the driver for our AI roadmap. You integrate LLM APIs (OpenAI, Gemini, Anthropic) and transform them into real-world product value
• Agentic Systems & Workflows:You design and implement advanced agentic patterns, including tool/function calling, ReAct loops, multi-step orchestration, and intelligent memory systems
• Collaborative Engineering:You work closely with our Data Engineer on data-to-product integration and contribute to our CI/CD pipelines to ensure high-quality deployments
• Security & Reliability:You implement security best practices, with a specific focus on prompt injection defense, output validation, and data privacy

Dein Profil

• JVM & Python Proficiency:You are experienced - or have a strong desire to make it your primary language -in Kotlin/JVM (Spring Boot, Hibernate) and you are solid in Python (FastAPI)
• AI Expertise:You have Hands-On experience integrating LLM APIs into live products. You understand RAG, context management, and reasoning patterns. Experience with LangGraph is a big plus
• Tech Stack Foundations:You are comfortable with PostgreSQL and have basic knowledge of TypeScript (React/Redux) - Familiarity with GCP is an advantage
• Security Mindset:You build with a "security-first" approach (OWASP Top 10) and understand the unique challenges of LLM-based applications.
• Language:Strong English is mandatory - Proficient German skills are a plus

Warum wir?

• Startup Culture:Fast, dynamic, and with enormous scope for making a real impact alongside the founding team
• Attractive Compensation:We offer an attractive salary package
• Flexibility:You value the flexibility of remote work but are excited to join us in the Berlin office as well
• Benefit Programand Team Offsites, Office Parties and Team working days
• Development:We provide an unique professional development approach as well as a broad network of mentors
• Impact Doesn't Get Bigger Than This:Your work directly contributes to saving millions of tons of CO2 + public money and accelerating the energy transition in Germany