Samuel Manzanera

Built and shipped Bitcoin-native products using Taproot, timelocks, Lightning, and Statechains. Designed self-custodial systems where protocol constraints enforce security and ownership guarantees. Integrated Nostr as a coordination layer for identity, payments, and audit trails. Led product and engineering end-to-end: architecture, protocol design, and implementation.

Built core architecture of a high-throughput blockchain network. Led distributed teams working on consensus, cryptography, and system performance. Improved transaction throughput and system reliability through protocol and infra changes. Designed SDKs and developer tools to support ecosystem adoption. Set up CI/CD pipelines and observability for production systems.

Designed and built Ethereum-based applications and smart contracts for enterprise clients. Implemented tokenization systems and custom fundraising mechanisms. Deployed and maintained production dApps and supporting backend services. Advised clients on architecture, trade-offs, and practical adoption of blockchain systems.

Built blockchain PoCs focused on identity and secure data sharing. Designed systems using zero-knowledge proofs and encryption for enterprise use cases. Developed cloud-based applications using Docker and AWS. Integrated enterprise systems via APIs and Mulesoft. Led teams and ran internal workshops on blockchain adoption.

Built frontend and backend features for mobility and transport platforms. Developed APIs and interfaces for geospatial data access. Worked in Agile teams delivering production systems. Skills: C#, JavaScript, APIs.

Improved internal engineering tools used for tire design workflows. Enhanced performance and usability of legacy applications. Contributed to modernization of existing systems. Skills: .NET, WPF, UX.