During a two-month period, Sevic contributed to the OriginTrail/ot-node and OriginTrail/dkg.js repositories, focusing on backend and blockchain development using JavaScript, TypeScript, and Node.js. He refactored sync logic and interval management to improve scheduling reliability, overhauled logging and telemetry for better observability, and enhanced error handling throughout the codebase. Sevic implemented robust finality checks for Knowledge Collection minting, introduced conditional finality handling on OTP networks, and optimized transaction receipt polling to prevent indefinite waits. His work addressed critical bugs, stabilized block confirmation logic, and improved performance, demonstrating a thorough approach to reliability, maintainability, and system throughput.