Côme Grellard
Software Development Engineer at Amazon Web Services (AWS)
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolCôme Grellard is a Software Development Engineer with 10 years of experience building user-centric, data-informed products across backend, frontend, mobile and data engineering domains. He helped scale Ledger’s flagship apps used by over 2M monthly users, raising code quality and architecture standards across a 40+ engineer codebase while mentoring peers and leading cross-functional initiatives. Comfortable shipping end-to-end solutions, he has hands-on experience in React/React Native, Node.js microservices, web scraping, and browser extensions, and has implemented features and bug fixes in prominent open-source Ledger Live repositories. At Bluecoders he combined recruitment domain knowledge with technical tooling—classification algorithms, scraping, and a Chrome extension—to materially speed candidate sourcing. Now at AWS, he brings that product-minded engineering approach to cloud-scale challenges, pairing strong communication and emotional intelligence with technical depth. Colocated in Paris, he blends curiosity across cybersecurity, blockchain, home automation and electronics—often working on the integration points others overlook.
10 years of coding experience
7 years of employment as a software developer
EpitechComputer Science, Computer Science at University of California, BerkeleyComputer Science, Computer Science at California State University, Long Beach
Github Skills (19)
wallet10
javascript10
react-native10
typescript10
ui-design10
uid10
front-end-development10
typescript-types10
typescripts10
react10
localization9
cryptocurrency9
styles8
mobile-ui8
styled-components8
Programming languages (2)
Github contributions (5)
LedgerHQ/ledger-live-mobile
Feb 2022 - May 2022
⛔️ DEPRECATED - Ledger Live (Mobile)
Role in this project:
Mobile Developer
Mobile DeveloperContributions:21 reviews, 113 commits, 46 PRs in 3 months
Contributions summary:Côme primarily focused on bug fixes and feature enhancements within the Ledger Live Mobile application. Their commits addressed various issues, including fixing UI display problems, resolving bugs in the Bitcoin and Ethereum transaction flows, and improving the user experience through changes to the onboarding and settings screens. The user also added a staking button for Ethereum accounts and modified swap and market features.
react-nativebluetoothblockchainwalletcryptocurrency
LedgerHQ/ledger-live
May 2022 - Jan 2023
Mono-repository for packages related to Ledger Live and its JavaScript ecosystem.
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:715 reviews, 436 commits, 452 PRs in 8 months
Contributions summary:Côme's contributions primarily involve fixing typos in the English localization files and refining components related to the "ratings" feature, including the display of rating flow modals. A new read-only portfolio page and corresponding components have been added to facilitate displaying the data for crypto assets. They also modified the notifications indicator on the wallet page, and addressed a bug within the asset page, fixing keyboard avoiding view behavior.
javascriptmonoecosystemledgerledger-live
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.