Olavo Martsinkevich,
I love building with startups, taking products from zero to one, and from one to a million users. Everything from agent infrastructure to the small details people notice without knowing why. Based in Brazil.
Right now I'm a forward deployed engineer at Railblocks, working directly with funds like a16z and Paradigm and shipping what they need into their own AI operating systems. Before that I worked on core messaging, mobile and AI features at Ando, team chat for people and agents (featured on Anthropic's blog) and RL environments for frontier labs at Matrices (covered by The New York Times).
work/
Railblocks
Forward deployed at investment firms: I work with their teams and ship what they need into their AI operating systems.
Ando
Core messaging, the mobile app and AI features for team chat where people and agents work together.
Matrices
Reinforcement learning environments for the top AI labs.
idwallacquired by Serasa Experian
Identity and fraud prevention for Brazil's largest banks. I rebuilt its auth and moved 1.5 million users.
earlier/
- 2022-2025
SASI Software Developer
Communication apps for state and city governments, with over a million downloads, and an AI assistant for 400,000 users.
- 2024-2025
Venturus Software Developer
Led a front-end team of four on an admin platform for electric vehicle charging, and cut page load times by 30%.
- 2024
Objeto: Technology for good Software Engineer
Natural language querying over a database with millions of entries, from Toronto.
- 2021-2022
Caviar Criativo Web Developer
Interfaces for 15 clients in Manaus, built to WCAG accessibility standards.