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

Berlin, Remote / Mobil

Vollzeit

Festanstellung

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

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

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 Program and 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

The Demo Daten GmbH is a fictional company created by Personio to familiarize our customers with our software.