Principal Python Engineer — Agentic AI

IN SLOVAKIA - Košice or Bratislava - Deutsche Telekom Services Europe is an internal services provider of Deutsche Telekom, one of the world's leading integrated telecommunications companies. We feel at home in the cosy middle of Europe. Our shared mission is to put priority on customer satisfaction, quality and innovations in areas of finance and procurement services. We are on our way to become industry's top service company and we want you to be a part of the success story! Apply now and design with us the world of tomorrow. Which challenges are expecting you You will lead the development and improvement of our Python backends for LLM-backed agent applications, such as chatbots, as well as the ongoing evolution of our Agentic AI platform.You will provide technical direction for a team of Agentic AI engineers, define engineering standards, review architectural decisions, and support the team in delivering scalable, reliable, and production-ready solutions.You will improve customer experience by stabilizing and enhancing existing solutions, including better visualization, automated validations, function calling, agent actions, observability, and quality assurance.You will identify and implement new business requirements and translate them into sustainable technical solutions.You will drive cooperation with the business and actively contribute to customer workshops, meetings, and calls. The ability to explain technical topics clearly to business colleagues and demonstrate a consultant’s mindset is essential.You will lead technical brainstorming sessions, architecture discussions, code reviews, and pair programming sessions.You will identify potential use cases for automation, Agentic AI, and data science. Innovative ideas are welcome.You will actively mentor engineers, support their development, and promote software engineering best practices across the team. We work in a HYBRID STYLE of working with the possibility of working from home , but twice a week we meet in the office in Košice or Bratislava for meetings What experience should you have Candidates with education suit the position University education (Master's degree) Language skills English - Advanced Personality requirements and skills At least 8 years of experience building and operating production-grade software in Python, preferably using frameworks such as FastAPI, Pydantic, Temporal, and similar technologies.Proven experience leading engineers, technical workstreams, or software development teams.Strong understanding of software architecture, distributed systems, API design, asynchronous processing, scalability, resilience, and production operations.Preferably strong knowledge of LLM and Agentic AI frameworks such as LangChain, LangGraph, LlamaIndex, as well as Azure OpenAI and OpenAI APIs. Ideally, you have already built and operated a production-ready solution using these technologies.Practical experience with relational databases such as PostgreSQL, in-memory databases such as Redis, and document or search databases such as Elasticsearch and MongoDB.Proven experience designing, building, and operating RESTful APIs and web service applications in production.Cloud and DevOps experience, including Docker, CI/CD tools such as GitHub Actions or GitLab CI, and deployment to Azure, AWS, or GCP.Understanding of production requirements for Agentic AI systems, including testing, evaluation, observability, security, cost management, and reliability.You are comfortable making technical decisions, explaining trade-offs, and aligning engineers and stakeholders around a clear solution.You are flexible, comfortable with changing priorities, and prefer working in agile environments such as XP, Scrum, or Lean.You can explain complex architectures and technologies in a clear and accessible way to customers and business stakeholders.You actively mentor more junior personnel and share your knowledge of software development lifecycle and best practices.Fluent written and spoken English.Nice to have: German language skills.Prompt engineering and LLM evaluation experience.Familiarity with MLOps or AI workflow orchestration tools such as MLflow or Dagster.Experience with Kubernetes, infrastructure as code, or LLM observability tools.Domain-specific experience in telecommunications or finance. Benefits Annual bonusFully paid meal vouchersPhone also for private useDiscounts for selected Telekom productsSupplementary pension saving contributionCafeteria system of benefits/Multisport cardSick daysSports club & Health daysTeambuildings, summer & Christmas partyOpportunities for career growthReferral programFlexible working time