Python Developer with Node.js Maintenance Skills (m/f/d)
Responsibilities
- Maintain and stabilise the existing Node.js conversational backend (bug fixes, minor enhancements, testing, reliability, cautious change management)
- Ensure continuous operation of production services and timely resolution of maintenance issues with no regressions
- Work with a short-term Node.js maintenance focus and transition mid- to long-term to full-time Python/AI development
- Develop and extend a Python-based conversational AI orchestration layer (LangChain / LangGraph)
- Implement LLM orchestration pipelines including prompt engineering, API integration, hallucination handling, error handling, and fallback strategies
- Participate in architecture discussions and the migration from Node.js to a Python/Kotlin stack
- Integrate and collaborate with Kotlin backend services and engineers
- Create and maintain automated tests, technical documentation, and CI/CD pipelines
- Collaborate closely with a cross-functional product team (frontend, Kotlin, business, design)
Profile
- Professional experience maintaining Node.js backends in production environments (Express/Koa-style)
- Professional Python experience
- Practical experience with LLMs, LangChain, and prompt engineering
- Proven handling of LLM-specific challenges (e.g. hallucinations, prompt iteration, reliability)
- Experience with automated testing (Jest/Mocha, pytest) and CI/CD pipelines
- Familiarity with Kotlin backend ecosystems and service integration
- Experience with Git / version control
- Familiarity with Docker, cloud platforms (AWS, Azure, GCP), and Databases (PostgreSQL, MongoDB, Redis)
- Solid understanding of API design
- JWT/OAuth2 knowledge is an advantage
Benefits
- International client
- Remote work possible
About Hays
IT is and always has been our core business that laid the foundation for Hays' success. We are the biggest privately owned IT recruitment agency in Germany and offer the best jobs for every career level – whether you are interested in vacancies in agile SMEs or international DAX groups. Hays masters the entire IT job spectrum, from support to software architecture or digitalisation – thanks to our broad portfolio, we have something for everyone. In the last decades, we were able to support numerous IT experts with choosing the right path for a successful career, positioning ourselves as their lifelong partner. Our highly specialised consultants can cater to your every wish and expectation and will prepare you for interviews and contract negotiations. Give it a try and learn what the market has to offer – our services are free of charge, non-binding and discreet! We look forward to hearing from you.
Staffing process for freelance specialists
- Analysis of qualifications
- Telephone or personal interview
- Contact with customers
- Contract with Hays
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1. Analysis of qualifications
We carry out a detailed analysis of your technical qualifications on the basis of your CV, your application documents and your profile.
Contact at Hays
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