Сергій
Senior Python Backend Engineer (Microservices, AWS, GenAI, RAG App)
- City of residence:
- Zaporizhzhia
- Ready to work:
- Remote
Contact information
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Work experience
Senior Python Backend Engineer
from 08.2021 to 06.2026
(4 years 11 months)
Quintagroup, Львів (IT)
Engineered and launched an AI-driven RAG application from concept to production. Built core data ingestion pipelines and optimized vector search in Weaviate and Qdrant using metadata enrichment for highly relevant LLM context retrieval.
Architected the backend to support AI workloads using Django (DRF), integrating Celery and Kafka. Designed asynchronous workflows to handle long-running LLM inferences without blocking core microservice communication.
Integrated specialized third-party AI APIs for automated document processing, extracting structured data from raw files to continuously feed the RAG system's knowledge base.
Optimized traditional high-load backend architectures by refining complex PostgreSQL queries and MongoDB aggregations, implementing robust Redis caching.
Orchestrated event-driven serverless workflows utilizing AWS Lambda and Step Functions, streamlining data retrieval and efficient AWS S3 storage management.
Collaborated directly with the CTO to shape the technical roadmap for AI features, managed on-call operations, and ensured system reliability through comprehensive Pytest suites.
Education
Zaporizhzhya National Technical University
Specialty 151: Automation and computer-integrated technologies., Запоріжжя
Higher, from 2022 to 2026 (4 years)
Knowledge and skills
- Python
- GitHub
- JavaScript
- MySQL
- Docker
- PostgreSQL
- Django
- FastAPI
- Ai
- Rag
- Git
- Наполегливість
- Адаптивність
- Неконфліктність
Language proficiencies
English — above average
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