Anatoliy Vasilyev

Tech Lead / Senior Fullstack Developer with 9 years in C#/.NET, SQL and JavaScript/TypeScript across banking compliance, marketplace analytics and web applications.

At Prospero (April 2019–present), develop KYC/AML services used by 5+ European banks. Reduced a REST request parsing 500 payments and submitting them to a database broker from 30 to 6 seconds at the same volume under comparable conditions; reworked SQL calls, code and data structures. Built a validated web SQL query builder, replacing direct SQL Server access and manual XML edits. Bank analysts now change and check queries independently. Built 6+ integrations including LexisNexis/OpenSanctions, Selenium data collection, a database editor, relationship graphs and dashboards.

Owned and completed the port of 4 apps/services from .NET Framework 4.5.2 to .NET 9 in 3 months using Codex and Claude Code. The new version is under testing before production: automated API/DB tests, manual business scenarios and comparison with the old version. Led 2–3 developers in 2025–2026 and helped hire/onboard 3. New hires handled routine tasks independently after about a month.

Alongside Prospero, built a 15-service .NET 10 Ozon seller product (September 2024–present); led 1–2 developers. Delivered the first working reporting service in 10 months, replacing a complex Excel workbook. Added FBO FRESH sales, Ozon commissions and purchase completion rates. Product settings have effective date ranges. Generation is automatic after configuration and launch; monthly reports for 10 stores take about 30 minutes. All 10 sellers (35+ stores) have generated reports; used daily, currently free. Reports inform advertising, promotions and listing changes.

Wrote AI-agent specifications, reviewed architecture and implementation with Codex/Claude Code. Manually verified product calculations against Ozon reports. Failed reports require manual restart. Interview demo available. Stack: ASP.NET Core, React/TypeScript, PostgreSQL, Ocelot, RabbitMQ/MassTransit, Docker, tracing and monitoring. Telegram review bot: 25+ users, 200+ reviews daily; price-index bot: 15+ users, 500+ listings.

Previously built a Node.js/React/MongoDB CPA network: 20+ publishers, 5+ advertisers, 10,000+ conversions. Also use Angular 7/22, SQL Server, Redis, OpenShift and design patterns. Russian native; English B2 for documentation and clients; German A1.

Yerevan, Armenia. Available within two weeks of an offer; will leave Prospero and support Ozon outside work hours. Open to permanent/part-time work, remote/hybrid/on-site, travel and relocation. No EU/UK/US/Canadian work authorization.