{"id":3819475,"url":"https://alion.io/job/ableneo-senior-python-backend-engineer-ai-llm","title":"Senior Python Backend Engineer (AI / LLM)","company":{"id":2606258,"name":"Ableneo","domain":"ableneo.com","url":"https://alion.io/company/ableneo","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Nalgoo","truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Vienna, Austria"],"countries":["AT"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":3000,"max":null,"currency":"EUR","period":"month","gross":null,"usd_annual":40416},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"CI/CD","optional":false},{"name":"FastAPI","optional":false},{"name":"Git","optional":false},{"name":"LLM","optional":false},{"name":"Pydantic","optional":false},{"name":"Pytest","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"Computer Vision","optional":true},{"name":"Docker","optional":true},{"name":"Kubernetes","optional":true},{"name":"LangChain","optional":true},{"name":"LangGraph","optional":true},{"name":"Prompt Engineering","optional":true}],"status":"live","first_seen_at":"2026-11-05T13:55:49Z","employer_posted_date":"2026-11-05","last_verified_at":"2026-11-07T05:46:39Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"from 3000€/gross\nJob description\nWe are looking for a Senior Python Backend Engineer (M/F) for our client in the banking sector. The role focuses on developing modern backend services and AI-powered applications, combining strong Python engineering skills with hands-on experience in LLM-based solutions and agent orchestration.\nResponsibilities\nDesign, develop and maintain scalable backend services using Python.\n\nBuild REST APIs and define API contracts using FastAPI or similar frameworks.\n\nImplement asynchronous processing, data validation and automated testing.\n\nDevelop and integrate LLM-powered functionalities, AI agents and external tools.\n\nWork with knowledge sources and contribute to agent orchestration.\n\nEvaluate and improve the quality, reliability and performance of AI-generated outputs.\n\nWrite clean, maintainable and well-tested code.\n\nParticipate in code reviews and collaborate with cross-functional engineering teams.\n\nContribute to CI/CD workflows and continuous improvement of development processes.\n\nRequirements\nStrong hands-on experience with Python backend development.\n\nExperience with modern Python (3.12+) and asynchronous programming.\n\nExperience building REST APIs using FastAPI or comparable frameworks.\n\nKnowledge of Pydantic or similar data validation frameworks.\n\nExperience writing automated tests, preferably using pytest.\n\nPractical experience with LLM-based applications delivered to production.\n\nUnderstanding of agent orchestration and integration of LLMs with external tools or knowledge sources.\n\nExperience with Git and collaborative development workflows.\n\nProfessional working proficiency in English.\n\nNice to Have\nExperience with LangChain or LangGraph.\n\nKnowledge of prompt engineering and LLM evaluation techniques.\n\nExperience with Docker and Kubernetes.\n\nFamiliarity with metrics, tracing and structured logging.\n\nPrevious experience in banking, financial services or other regulated environments.\n\nBenefits\nEngaging projects across diverse industries, offering continuous professional challenges and growth opportunities\n\nTailor-made learning & development program, complemented by monthly in-house workshops to boost your skills\n\nFlexible working hours and the possibility of home office\n\nModern, inspiring office environment with daily perks such as breakfast, fresh fruit, and yoga sessions\n\nMultiSport card to support an active lifestyle and access to a wide range of sports and wellness facilities\n\nCompany description\nWho we are\nAbleneo is a partner for AI and technology-driven transformation. We combine deep software engineering with business consulting to help organisations implement intelligent systems that deliver measurable results and reduce the risk of failed innovation.\nWhat we do\nAI & Data Enabling. We deploy chatbots and LLM solutions, automate documents and workflows, and work with Computer Vision. Our focus is on solving concrete business problems with AI and achieving a high success rate in real use cases.\nBusiness Optimisation & Efficiency. We streamline processes, reduce delays, automate operational work, and set up more efficient ways of working.\nProduct Design & Development. We design and build digital products, customer journeys, and scalable platforms that support long-term growth.\nSoftware Engineering. We offer flexible delivery models. From specialised roles to full teams, supporting both fast-growing companies and established enterprises.\nWhy join us\nWe have years of experience and strong references across startups, scale-ups, and large organisations. We work on assignments where AI makes real impact. For example, in the banking sector we validated an LLM solution with a high success rate in a real proof-of-concept.\nAt Ableneo you will work on projects that push the boundaries of AI and software engineering. 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