Full-Stack Engineer; m​/w​/d

In Germany - Berlin | Bonn | Cologne | Frankfurt/Main | Hamburg | Munich

We are seeking an AI Full-Stack Engineer to contribute to designing and building scalable SaaS products within our AI Lab. In this role, you’ll combine deep technical expertise with strategic vision to build AI-powered products that will help transform our clients’ business models and enable their growth.

Simon‑Kucher is at the forefront of innovation in driving commercial excellence, revamping business models, developing solutions and methodologies for unlocking better growth of our clients. Within Elevate Lab, we are developing cutting‑edge large scale AI products to deliver sustained top‑line impact for our clients.

Are you interested in working in a team of AI evangelists with a can‑do attitude? Want to experience the dynamics of agile processes in open‑minded teams? How about getting creative in a startup atmosphere with a steep development curve and flat hierarchies? And most importantly, do you want to make a difference? Then you've come to the right place.

• Advance your career with exciting professional opportunities in our thriving company with a startup feel
• Innovate by transforming ideas into cutting‑edge AI products, championing AI and Generative AI through creative experimentation to push boundaries and deliver transformative solutions.
• Voice your unique ideas in a culture defined by our entrepreneurial spirit, openness, and integrity
• Feel at home working with our helpful, enthusiastic colleagues who have great team spirit
• Broaden your perspective with our extensive training curriculum and learning programs (e.g. Linked In Learning)
• Speak your mind in our holistic feedback and development processes (e.g. 360‑degree feedback)
• Satisfy your need for adventure with our opportunities to live and work abroad in one of our many international offices
• Enjoy our benefits, such as hybrid working, daycare allowance, corporate discounts, and wellbeing support (e.g. Headspace)
• Unwind in our break areas where you can help yourself to the healthy snacks and beverages provided See another side of your coworkers at our frequent employee events, World Meetings and Holiday Parties

• Ship secure and accessible UIs and services that turn data/ML/GenAI into delightful, explainable features
• Build and launch multi‑tenant app modules (UI + services) with role‑based access and audit logging
• Implement RAG‑powered features with high UX trust signals (citations, source previews, evaluations in‑product)
• Establish a UI design system and component library for reuse across products
• Design and build Type Script/React (or equivalent) front ends and service layers (Node/NestJS or Python/FastAPI)
• Implement authN/authZ (OIDC), tenancy boundaries, rate limiting, and usage metering
• Integrate ML/LLM endpoints via a gateway; instrument for latency, errors, and cost; implement fallbacks
• Own end‑to‑end testing (contract, e2e, accessibility), CI/CD, and release automation
• Collaborate with Product team on discovery and with UX Designer on IA/UX
• Write technical documentation
• Work with Cloud Platform Engineer to deploy and manage services securely

• 3+ years shipping production web apps; strong Type Script;
  React/Next.js; REST/GraphQL;
  Node or Python services.
• Secure multi‑tenant patterns; API design; async messaging; caching; performance profiling.
• Integrating ML/LLM services (streaming, tool use, evals, guardrails)
• Python (advanced);
  FastAPI (async/await, DI, middleware), Pydantic (validation/serialization/API contracts)
• SQL Alchemy (ORM, performance), Alembic (migrations);
  Pytest (unit/integration)
• React (advanced), Type Script (expert), Tan Stack Query, React Router, React Hook Form
• Data viz:
  Recharts/Chart.js (expert)…