Wir sind Bertrandt.
Ein eigenständiger und internationaler Engineering Dienstleister mit langjähriger Expertise. Mit branchenübergreifendem Know-how und einem ganzheitlichen System- und Produktverständnis schaffen wir technologische Lösungen entlang der gesamten Wertschöpfungskette. Wir beschäftigen uns mit den Trendthemen Digitalisierung, E-Mobilität und Autonome Systeme hauptsächlich für die Branchen Automotive, Luftfahrt, Defence und Maschinenbau und ermöglichen hier konsequent die Entstehung passgenauer Lösungen. Unser Ziel: den technologischen Fortschritt beschleunigen und einen relevanten Beitrag zu einer nachhaltigen Zukunft leisten. Daran arbeiten wir jeden Tag – mit rund 12.000 Mitarbeiterinnen und Mitarbeitern an über 50 Standorten weltweit.
We are looking for an experienced Senior Python Backend Developer to support the industrialization of AI-powered applications within an innovative enterprise platform environment.
The ideal candidate combines strong software engineering expertise with experience in building scalable backend systems, APIs, and cloud-native applications. A key aspect of this role is transforming rapidly developed AI prototypes into secure, maintainable, and production-ready enterprise solutions.
The consultant should be comfortable working independently, identifying technical improvement opportunities, and collaborating closely with frontend developers, AI specialists, cloud engineers, and platform teams.
Key Facts
- Strong understanding of how individual contributions impact end-to-end business processes
- Fluent English required
- Experience with AI-powered applications
- Strong Python expertise
- Up to 100% mobile working possible after onboarding and individual agreement
Your Responsibilities
- Design, develop, and maintain scalable Python backend services
- Build and integrate REST APIs for modern web applications
- Develop data processing pipelines supporting AI-based solutions
- Transform proof-of-concept and prototype applications into production-ready enterprise software
- Improve software architecture, maintainability, scalability, and performance
- Implement authentication, authorization, logging, monitoring, and error-handling concepts
- Ensure high code quality through testing, code reviews, and engineering best practices
- Create technical documentation and architectural guidelines
- Collaborate closely with Data Scientists, Frontend Developers, Product Owners, and Cloud Engineers
- Contribute technical expertise and proactively drive improvements to existing solutions
Required Technical Skills
Programming & Backend Development
- Python (5+ years of professional experience)
- FastAPI (preferred) or Flask
- Asynchronous Python development
- Object-Oriented Programming (OOP)
- Clean Architecture / Domain-Driven Design (DDD)
API Development
- REST API design and implementation
- OpenAPI / Swagger
- Authentication concepts (OAuth2, JWT)
Databases
- PostgreSQL
- SQLAlchemy
- Data modelling and database design
Software Engineering
- Clean Code principles
- Software architecture and design patterns
- Unit testing and integration testing
- Performance optimization
- Production debugging and troubleshooting
AI & Data Experience (Preferred)
Experience with AI-supported applications is highly desirable, including:
- Backend services supporting LLM-based applications
- Vector databases
- Retrieval-Augmented Generation (RAG) architectures
- LangChain or LlamaIndex
- Document processing pipelines
- AI model integration via APIs
Your Background
- Minimum completed vocational training
- 5+ years of professional experience in Python backend development
- Proven track record building production-grade backend applications
- Experience designing scalable APIs and backend services
- Experience working within cloud-native environments
- Experience modernizing, optimizing, or industrializing existing software solutions
- Experience collaborating within agile and cross-functional teams
Personal Competencies
- Strong analytical and problem-solving capabilities
- Independent, structured, and solution-oriented working style
- Excellent communication skills
- Pragmatic and hands-on mindset
- High quality standards and attention to detail
- Ability to challenge existing technical solutions constructively
- Fluent English, both written and spoken
Senior Python Backend Developer (m/f/d) to support the development of scalable backend solutions and AI-powered applications. If you are passionate about Python, cloud-native technologies, and modern software architecture, we look forward to hearing from you.
Bertrandt legt großen Wert auf Gleichbehandlung und Chancengleichheit. Unsere Recruiting-Entscheidungen basieren auf den Erfahrungen und Fähigkeiten der Bewerber*innen. Schwerbehinderte Menschen bzw. gleichgestellte Menschen im Sinne des SGB IX sind herzlich willkommen und werden bei gleicher Eignung bevorzugt eingestellt.
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