About this role
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 Within the framework of temporary employment, we are looking for an experienced 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. 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