Ludvík Prokopec

• Engineered a global proxy network to manage IP rotation for web scrapers, significantly improving unblocking capabilities.
• Designed automated fallback mechanisms for unhealthy proxy providers and integrated observability tools to ensure network fault tolerance and high availability.
• Implemented dynamic distributed rate limiting across multiple proxy instances to intelligently balance request loads and prevent system saturation.

Stack: Node.js, TypeScript, HTTP/HTTPS (CONNECT, TLS), Proxy-Chain, PubSub, MongoDB

• Engineered a scalable CMS to manage and synchronize data across a distributed network of digital signage devices.
• Designed type-safe GraphQL APIs with Nexus and Pothos, implementing secure resolvers and strict access controls.
• Integrated React and TypeScript frontends with backend modules, ensuring secure and performant cross-screen data synchronization.

Stack: Node.js, TypeScript, React, GraphQL, Prisma, PostgreSQL

• Developed complex front-end websites with administrative interfaces using Contember.

Stack: Svelte, Node.js, TypeScript, GraphQL

• Architected a virtual WebAuthn authenticator using a microservices approach to serve as a secure alternative for physical security keys.
• Designed a stateless authentication flow utilizing JWT continuation tokens and implemented phantom tokens for secure and revocable client-side credentials.
• Engineered a backend service to handle core cryptographic operations, CBOR processing and Key Vault key generation.
• Developed a browser extension to intercept and proxy navigator.credentials API calls to a virtual web REST API.

Stack: Node.js, TypeScript, WXT, REST, PostgreSQL, WebAuthn, CBOR, Cryptography

• Engineered an open-source RPC library to enforce strict end-to-end type safety across backend and frontend contracts.
• Designed a custom schema introspection mechanism enabling seamless third-party API integrations.
• Architected an open API solution that delivers robust external accessibility while maintaining the streamlined developer experience of tRPC.

Stack: Node.js, TypeScript, RPC, API Design

• Architected a custom reactive framework from scratch to master the internal architecture powering modern reactive frameworks.
• Designed a reactive proxy model to effectively bypass the performance bottlenecks of traditional DOM manipulation.
• Optimized the rendering engine by strictly minimizing the need for manual interface updates and redrawing.

Stack: TypeScript, State Management, DOM Optimization

• Detailed an API Gateway architecture that swaps opaque tokens for stateless JWTs to balance external security and internal efficiency.

• Designed a cryptographic protocol using blind exponentiation to detect breaches without exposing user data.

• Proposed a recovery mechanism integrating WebAuthn PRF extension and Shamir’s Secret Sharing.

• Specialized in secure middleware architecture, microservices, and robust API design for scalable web services.
• Studied Semantic Web technologies and RDF data models, and evaluated complex web graphs using PageRank.
• Analyzed multimedia database indexing within metric spaces to optimize similarity-based searching and complex data retrieval.

• Focused on foundational cryptography primitives, hashing algorithms, and public-key infrastructure.
• Built a solid foundation in advanced algorithms, core data structures, and concurrent multi-threaded programming.
• Studied distributed systems architecture, database management, and low-level programming using C and C++.