Ivan Zanov

Web3 & Backend Engineer

Freelance Web Designer • Freelance

Sep 2025 - Present • 1 yr 2 mos

Worked as a Web3 and Backend Engineer, designing and implementing production-grade smart contracts and scalable backend systems. Built and deployed Solidity smart contracts including MPOW Token and TreasuryEngine, integrating Uniswap V3 TWAP oracle pricing, liquidity management, and secure payment flows. Performed extensive security testing using Foundry, fuzzing, Slither, and Aderyn, identifying and mitigating vulnerabilities related to oracle manipulation and liquidity risks. Designed and implemented a scalable backend system for high-volume video uploads and processing, supporting concurrent users and asynchronous task execution. Built distributed processing pipelines using task queues (Celery/Redis), enabling fault-tolerant execution and efficient handling of long-running jobs. Focused on performance optimization, system reliability, and secure architecture across both blockchain and backend components.

Competitive Programming Instructor

Educational Engagement • Freelance

Oct 2023 - Present • 3 yrs 1 mo

Worked as a Competitive Programming Instructor, teaching students advanced algorithmic problem solving and preparing them for national and international programming competitions. Delivered structured courses covering key topics including data structures, graph algorithms, dynamic programming, greedy methods, and optimization techniques. Mentored students for competitions such as EJOI, BOI, and national olympiads, improving their problem-solving skills and contest performance. Designed and created original algorithmic problems and training materials, including tasks used in national-level competitions and olympiad preparation. Provided one-on-one mentoring and code reviews, helping students develop efficient and optimized solutions under time constraints.