Mario Santamaría Osorio

Full Stack Engineer & CTO

Madrid, Spain

About me

Full Stack Engineer and CTO with expertise in blockchain technology, web development, and technical leadership. Focused on making the best hiring experience for recruiters and candidates. Based in Madrid, Spain.

Experience

Hireflix

Fullstack developer

2025 - Now

Making the best platform for one-way video interviews.
StreamETH

Chief Technology Officer

2024 - 2025

Leading technical strategy and development of streaming solutions for crypto events and AV teams.
StreamETH

Fullstack engineer

2024 - 2024

Developing high-quality and scalable solutions for crypto event organizers and AV teams.
MTP Métodos y Tecnología

Technical Lead

2022 - 2024

Led European proposals and national projects while collaborating on technical development.
broadcaster.xyz

Co-Founder and Fullstack developer

2020 - 2021

Full stack development focusing on blockchain technology and smart contracts.

Education

Universidad Politécnica de Madrid

2018 - 2023

Computer Science

Projects

StreamETH Platform •

Main platform for crypto event streaming and management

Lead developerSystem architectureStreaming infrastructure
Devcon Monorepo •

Contributor to Ethereum's Devcon conference infrastructure

Open source contributionEthereum ecosystem
Soldeer •

Contributor to Smart contract depency manager tool

Open source contributionBlockchain toolsDeveloper utilities
Quicky EVM •

Fast EVM interaction tool

Blockchain developmentEVM tooling
netscan-rs •

Network scanner written in Rust

Network toolsRust development
macrors •

Rust macro nutrients calculator + AI command line tool.

Rust developmentOpenAI API
pandemicrs •

Pandemic analysis tools in Rust

Data analysisRust development
zig-pong •

Classic Pong game implementation in Zig

Game developmentZig programming

Skills

Docker
Go
TypeScript
Rust
React
Next
Mongo
Solidity
Web3