Marcin Olichwiruk

Designed and implemented distributed platforms for semantic data interoperability and decentralized identity, using the Overlays Capture Architecture (OCA) and the KERI protocol in a 4–6 person team. Focused on Rust-based backend services, cryptographic protocols, and WebAssembly-powered client-side security.

• Implemented and consulted on key design decisions for the Rust-based OCA ecosystem. This included the core oca-rs library, OCA SDK and repository services, and developer tooling (CLI and a web-based OCA Browser) for exploring and managing OCA bundles.
• Co-created a Digital Forms Platform that generates dynamic, responsive forms directly from OCA schemas; implemented key frontend components (React, Tailwind CSS) and a TypeScript/Node.js backend integrated via tRPC.
• Developed multi-threaded event processing and WebAssembly bindings for a KERI-based Decentralized Key Management System (DKMS). This enabled secure client-side cryptographic operations and reduced event processing time by around 30%.
• Set up and maintained CI/CD pipelines using GitHub Actions and Docker for automated testing, builds and multi-environment deployment.

As part of a four-person team, I co-designed and implemented modular backend services for student international course enrollments, integrating a new service with an existing Ruby on Rails application. The system was built to handle thousands of concurrent enrollments during peak periods.

• Co-architected a distributed system for handling enrollments, user management, and messaging between application modules, ensuring scalability and reliability under high load.
• Implemented backend services using Roda, integrating with an existing Rails application, and developed reusable gems for shared user management and data access.
• Applied DDD and CQRS patterns to optimize system performance, maintainability, and data integrity in high-volume enrollment scenarios, supporting thousands of concurrent enrollments.

AGH University of Science and Technology