Samuel Manzanera
SUPINFO International University
HexQuarter
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Work Experience
Senior Software Engineer
HexQuarter
April 2025 - Present
Built self-custodial Bitcoin and Lightning native React applications, improving user experience to have better Bitcoin adoption with the ease of liquidity management. Implemented a Nostr client offering shareable identity, social features, and content monetization Architected Nostr relay services embedding relay authentication, decentralized data storage, and oracle price distribution on NodeJ Integrated machine-to-machine payments for backend systems using Lightning payment (L402) Delivered advisory and architecture review for ongoing projects about self-sovereign solutions on Bitcoin and Nostr. Supported engineering effort for distributed systems based on Erlang to improve scalability and performance of the Arweave’s supercomputer
Software Architect
Archethic
September 2018 - April 2025
Interviewer
Led distributed engineering team, with hands-on on product design, roadmap, planning, and team growth. Implemented a new Layer 1 blockchain with novel consensus, validator models, and P2P infrastructure, providing high scalability and high-throughput transaction processing based on Elixir Built and maintained developer SDKs and integration tooling in Golang and TypeScript Designed a custom programming language (lexer, AST, interpreter) and WebAssembly support. Established monitoring, tracing (Grafana, Loki, Prometheus), and infrastructure release through delivery over CI/CD (Github Actions) Develop EVM upgradable smart contracts allowing the creation of a secure bridge between EVM and Archethic’s network via HTLC and cryptographic primitives to reduce concentration risk and smart contract hacks.
Consultant
Deloitte
October 2016 - July 2018
Built a blockchain-based digital identity decentralized application on Ethereum with Solidity smart contracts and an end-to-end cryptography protocol to ensure privacy and confidentiality over a public blockchain network. Developed SPA applications on AngularJS Designed cloud-native architecture for AWS with containers (ECS) for Node.js Developed API-driven integrations between enterprise platforms using MuleSoft. Ran technical workshops guiding enterprise clients through blockchain adoption, and mentored engineering teams on architecture practices. Helped institutional and banking actors to embrace Web3 technology through education and proof of concepts.
Software Engineer
VISEO
November 2015 - October 2016
Designed and implemented RESTful services in .NET/C#, leveraging HATEOAS to build discoverable and extensible APIs for transportation and mobility platforms. Built mobile and desktop user interfaces integrating API calls and interactive geospatial features with OpenLayers. Optimized Oracle database queries to improve performance and scalability.
Software Engineer
Michelin
November 2014 - October 2015
Modernized legacy .NET/WPF applications, reducing technical debt and improving the user experience of internal tools used by tire industry professionals. Optimized SQL queries and database interactions in Oracle to improve application performance and reliability
Education
SUPINFO International University
Master , Computer Science
2012 - 2015