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Freelancer Overview
Tomasz Gang Senior Software engineer Warsaw, Poland | [email protected] SUMMARY Senior Software engineer with 10+ years delivering Python-centric backend, cloud, and AI-enabled platforms across retail, consulting, and infrastructure domains. Strong record building FastAPI services, REST APIs, SQL data models, and scalable integrations that support automation, analytics, and customer-facing workflows. Recent work emphasizes RAG systems, LLM orchestration, LangChain, LangGraph, and AI- driven automation for reliable enterprise delivery. Experienced in system design, observability, CI/CD, and Azure-based deployments, with practical judgment around performance, maintainability, and operational risk. Effective in remote international teams, translating product needs into secure backend architecture, measurable outcomes, and clear engineering decisions. PROFESSIONAL EXPERIENCE Senior software engineer Nov 2023 - Present IKEA, Remote Led a digital engineering team on IKEA Kreativ services processing room scans with Python, FastAPI, and Azure SQL, improving design retrieval latency 28%. Designed RAG catalog enrichment for IKEA Kreativ product placement using LangChain and vector search, lifting recommendation precision 18%. Built resilient REST APIs that normalized scan metadata, product constraints, and customer design states, reducing integration defects across services. Optimized LLM prompt workflows for room-design assistance, adding validation guards that lowered unsuitabl