ILIA SAZONOV

I’m a backend-focused payments engineer at a card processor, where I ship and maintain critical payment integrations and platform security capabilities. At Stax Payments, I’ve worked across Mastercard/Visa flows, checkout options, and operational tooling that keeps payments reliable and compliant.

One of my proudest outcomes was architecting the Mastercard and Visa Account Updater integration, which resulted in a 2% increase in approval rate of card-not-present transactions. I also consolidated five payment forms into a single TypeScript library and unified corresponding API endpoints—reducing PCI scope and cutting operating costs by 10%.

I strengthen security by integrating OAuth 2.0 and multi-factor authentication, reducing vulnerabilities and ensuring compliance with industry standards. I’m also comfortable leading cross-team initiatives—I mentored junior engineers, coordinated across Onboarding, Platform, and Payments teams, and presented updates at company-wide Tech All Hands.

Beyond payments, I’ve built engineering leverage through automation and tooling: I built 3 AI agents (release-notes, code-review, and ticket creation) adopted by a 7-engineer team, automating ~4 hours/week of recurring work. Earlier, as a .NET Developer at Axis Lighting, I integrated third-party APIs, built desktop data management tools, and delivered C# automation that reduced manual effort by 25%.