About Quentin Nivelais

Systems engineer, CTO at Frak Labs

I build production systems end to end: smart wallets, self-hosted infrastructure, embedded firmware, and the tooling around them.

The substrates change, the job does not: smart contracts and account abstraction wallets, self-hosted Kubernetes, bare-metal Rust firmware, Android apps, and the tooling that keeps them shippable. Everything here is written from a system that runs, not from a tutorial.

articles written from production systems
43
global, EVM gas golfing contest
#2

Career

2022 - present

Co-Founder and CTOFrak Labs

Content monetization infrastructure: a self-custodial WebAuthn smart wallet embedded into Shopify and WordPress stores, and the on-chain reward system behind it.

2021 - 2023

Lead Android EngineerSybel

Android and Android Automotive apps, including a partnership with Renault for their onboard system launch.

2019 - 2020

Freelance Android DeveloperVarious clients

Custom mobile experiences, including the Coyali app to help seniors use smartphones.

2017 - 2020

Mobile Engineer ConsultantCapgemini and SNCF

Android applications for onboard agents and ticket validation terminals on the French railway system.

2016 - 2017

Full Stack FreelancerConstruction sector

PHP automation tools for inventory management and vehicle mileage tracking.

Projects

View all

Open source

Upstream work on the tools other people ship on.

Contact

Taking on new work from Q3 2026. Smart wallets, self-hosted infrastructure, embedded work, or anything you read here.