Dan Sotnik

- Architected multi-stage VLM harness (Gemini) — split-pass recognition, MongoDB Atlas Vector Search matching over 350K-item catalogue, confidence-gated classification, re-scan verification — converting one shelf photo to restock tasks at >80% task precision in <60s. Cut manual audit time 20×; avoided ~$30K/store shelf-robot capex. - Architected and built Corpus, org-wide production RAG platform on AWS (Qdrant + Bedrock, MCP) serving 5 teams; cut prompt tokens 65%, embedding cost 100× via diff-based incremental ingest; p95 ~250ms hybrid retrieval with OAuth 2.1 and fail-closed multi-tenant ACL. - Architected and built Coffre, a Python MCP server (AWS ECS Fargate, Terraform) unifying 4 prod data systems — MongoDB, PostgreSQL, Redis, AWS CloudWatch — behind one governed LLM-agent interface. Read-only by construction with writable dev sandboxes for safe experimentation; 3-layer authz-bypass defense, fail-closed ACLs, OAuth 2.1/SSO, sub-5s p95. Gave agents governed data access, replacing ~20 per-system integrations.

- Architected and built AI-powered inventory identification using vector embeddings (Gemini) in MongoDB Atlas Vector Search with multi-strategy matching (barcode, fuzzy, cosine similarity), resolving ~70% of unidentified SKU scans — identifying misrouted cross-location inventory in real time. - Designed semantic search across 100K+ records at <500ms p99 on MongoDB Atlas Vector Search, powering agentic AI pipelines and Gemini VLM computer vision — cutting manual search time by 70%. - Productionized batch image pipeline processing 750K+ product images via CSV ingestion with streaming I/O, replacing a 2-FTE manual workflow and reducing catalog onboarding from weeks to hours at 99.9% success rate. - Delivered Express Multi-Order Picking with atomic MongoDB transactions and real-time stock validation, reducing fulfillment time ~35% and doubling picker throughput across 15K+ weekly deliveries ($200K+ GMV). - Built Redis-backed presence system with TTL heartbeat tracking, supporting 2,000+ concurrent users across 40+ locations and cutting API latency ~40%. - Shipped Rider Count feature (Node.js, MongoDB, Vue.js, Python) across 42 locations in 4 countries; surfaced 9.3% rider allocation anomaly triggering a cost-saving operational review.

- Cut paint time 3x on data-heavy components by designing a custom virtualization mechanism powered by chunked rendering for large lists and tables. - Hardened web application security by implementing dual-lifecycle JWT authentication, inactivity-based forced logout, and a role/privilege hierarchy, eliminating known security incidents. - Refactored 200+ APIs using algorithmic improvements and engineering best practices, reducing Lambda compute costs by ~10%. - Owned the IaC layer (Docker, Kubernetes, Terraform), automating ~70% of cloud service deployment. - Cut Unit and E2E test launch time 30% by integrating Inquirer.js interactive commands into the test execution tool. - Drove migration of autotests from Express.js to Nest.js by consulting on architecture and systems design, accelerating the delivery timeline ~20%. - Led code review process improvements based on GitLab Handbook practices, increasing team KPI by 17%. - Collaborated with product and design teams; mentored backend engineers on frontend systems.

• Managed the electrical automotive parts panel with 20+ suppliers, including Multimedia, lighting, HVAC. • Launched Peugeot Partner for CIS region, achieving all milestones in time.

• Managed the electrical automotive parts panel with 20+ suppliers, including Multimedia, lighting, HVAC. • Launched Renault Dakar and negotiated with suppliers, achieving an 8% saving from electrical parts turnover. • Contracted special conditions for spare parts production and logistics, increasing availability by 20% and on-time shipments by 60%.

• Administrative support of purchasing department.

• Administrative support of purchasing department.

• Administrative support of the department.

Additional completed courses: Information Science and Databases, Fundamentals of Mathematical Analysis, Informative Heuristics, Internet System, Project Management, Cross-Cultural Management. The University founded in 1991 on the basis of the Moscow State Institute for History and Archives (1930) is one of the major actors in the Higher Education Reform in the Humanities in Russia. RSUH ranks among the TOP 200 Higher Education Institutions according to QS University Ranking: BRICS 2014 and has expertise in organizing inbound and outbound academic mobility between EU and Russia within EU projects.