Senior Full-Stack Engineer (m/f/d)

Simon-Kucher & Partners; Hamburg; Hybrid; EUR 70.000 - 90.000; Vollzeit

Zusammenfassung

A global consultancy is seeking a Senior Full-Stack Engineer to join their AI Lab, based in Germany. Your role will involve designing and implementing scalable SaaS products utilizing TypeScript and React. The ideal candidate has over 7 years of experience in web applications, a strong background in secure multi-tenant systems, and the ability to integrate advanced AI and ML features. This position offers the chance to work with a dynamic team in a startup-like environment and promote innovative AI solutions.

Leistungen

Hybrid working

Daycare allowance

Corporate discounts

Wellbeing support

Qualifikationen

• 7+ years shipping production web apps.
• Deep experience with multi-tenant systems and API design.
• Advanced Python and FastAPI expertise.

Aufgaben

• Design and build secure UI and services.
• Collaborate with Product and UX teams.
• Implement end-to-end testing and CI/CD.

Kenntnisse

TypeScript

React/Next.js

Node services

Python services

REST/GraphQL

Data visualization

SQLAlchemy

Docker

Tools

FastAPI

D3

Pandas

Kafka

Jobbeschreibung

Senior Full-Stack Engineer (m/f/d)

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

We are seeking an experienced Senior 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, and developing solutions and methodologies for unlocking better growth for our clients. Within the AI 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.

What makes us special:

• 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. LinkedIn 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

How you will create an impact:

• 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 TypeScript/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 technical discovery and feasibility and with UX Designer on IA/UX.
• Write technical documentation.
• Work with Cloud Platform Engineer to deploy and manage services securely.

About you:

• 7+ years shipping production web apps; strong TypeScript; React/Next.js; REST/GraphQL; Node or Python services.
• Deep experience designing and operating secure multi-tenant systems; API design; async messaging; caching; and performance profiling.
• Experience integrating ML/LLM services (streaming, tool use, evals, guardrails) and building RAG features with ingestion pipelines, embeddings, vector stores, and retrieval orchestration.
• Python (advanced); FastAPI (async/await, dependency injection, middleware); Pydantic (validation, serialization, API contracts).
• Data layer expertise: SQLAlchemy (ORM internals, performance tuning); Alembic (migrations); Pytest (unit and integration testing).
• React (advanced), TypeScript (expert), TanStack Query, React Router, React Hook Form.
• Data visualization: Recharts/Chart.js (expert) and D3 (for custom charts).
• State and composition patterns: Redux Toolkit or similar; atomic and compound components.

Architecture, Data & Streaming

• Domain-Driven Design, Clean Architecture, dependency injection, and repository patterns.
• PostgreSQL/MySQL: schema design, indexing, query tuning, and connection pooling.
• Kafka/MSK/Kinesis: producers/consumers, partitions, and at-least-once semantics (idempotency a plus).
• Pandas for pragmatic data manipulation in services and jobs.

Security, Quality & Governance

• AuthN/AuthZ (OAuth2/JWT), RBAC, and secure secrets handling.
• Data validation and governance (Great Expectations/Deequ); PII handling and encryption (nice to have).

Delivery & Operations

• Docker, CI/CD, Git workflows; observability basics (logs, metrics, traces).
• Database change management (Alembic; Liquibase/Flyway a plus).

Have we sparked your interest? Simply click the 'Apply now' button to submit your application. Please note that, for data protection reasons, we cannot accept applications via email.

Would you like to learn more about us and our company culture? Click here to watch our recruitment video.

About Simon-Kucher

Simon-Kucher is a global consultancy with more than 2,000 employees in 30+ countries. Our sole focus is on unlocking better growth that drives measurable revenue and profit for our clients. We achieve this by optimizing every lever of their commercial strategy – product, price, innovation, marketing, and sales – based on deep insights into what customers want and value. With 40 years of experience in monetization topics of all kinds, we are regarded as the world’s leading pricing and growth specialist. simon-kucher.com

We believe in building a culture that embraces diversity, equity, and inclusion, creating an environment in which our people feel valued, are able to be themselves and feel their contribution matters. If we get that right, remarkable things will happen; people will grow faster, innovate, feel valued, and create better outcomes for everyone – our people, our clients and, of course, our business.

Your personal contact:
Maria Weininger
recruitment.germany(at)simon-kucher.com

Please submit your application exclusively via the “Apply now” button!

Better growth starts here. With you.