• Designed and implemented cross-platform applications and deeply interconnected backend systems using mainly Kotlin, Rust and Python, focusing on system scalability, security, and regulatory compliance. • Designed and lead development of numerous backend services, from internal accounting to highload microservices serving thousands requests per minute • Developed critical systems designed for inherently insecure environments. Utilized specialized cryptographic software and hardware to ensure data security through encryption and/or digital signatures, maintaining data integrity. • Maintained and expanded existing backend systems to achieve new goals • Mentored trainee and junior developers on their path to software engineering • Researched and solved complex engineering problems and task in R&D department • Stepped in and finish several mobile projects with both Android View and Jetpack Compose

- Re-imagined and re-implemented E-Commerce solution abcms.pro into a large scale SaaS platform with subscription business model - Platform allowed to hold hundreds of e-stores that contained millions of products with realtime search and hundreds different API interactions - Designed UI/UX as well as Backend and Frontend, gaining extensive experience in understanding usability and user concerns -- Managed and led team of contractors that developed non-critical parts

Joined a project to research and prototype information retrieval system with asynchronous Python and Kafka / Kafka Streams (using Faust)

Researched the business niche; designed, implemented, delivered and supported long-term a premium standalone e-commerce platform that allowed to navigate hundreds of thousands of products

Engaged in web development, system architecture, and client-side scripting for multiple freelance projects, gaining extensive experience in both backend, frontend and desktop development