René Cordier
Java Backend Team Lead at Linagora Vietnam
Hanoi, Vietnam
Summary
🤩
Rockstar🎓
Top SchoolRené Cordier is a Java backend team lead with eight years of experience building and maintaining production mail and integration systems from Hanoi for French open-source-centered companies. He has deep expertise in mail server internals, contributing significant backend work to the Apache James project and shaping Linagora’s Twake Mail product. Comfortable across the stack, he also contributes full-stack fixes and UX improvements to Habitica, demonstrating a practical blend of frontend and backend skills. René’s background includes large-scale integration services (Service+) with CI, OAuth2, Cassandra, RabbitMQ and Elasticsearch, showing he thrives in distributed, data-driven systems. As a hands-on manager he balances coding, refactoring and team delivery, having moved from core contributor to leading the Java backend team. An early career of diverse internships and freelance projects underpins his pragmatic problem-solving and openness to new technologies.
8 years of coding experience
11 years of employment as a software developer
Master of Engineering (M.Eng.), Computer Engineering, Master of Engineering (M.Eng.), Computer Engineering at ESIL - Ecole Supérieure d'Ingénieurs de LuminyDUT (equivalent to a two-year degree in technical subject), Computer Science, DUT (equivalent to a two-year degree in technical subject), Computer Science at IUT de Blagnac (FRANCE)
French, English, Vietnamese
Github Skills (22)
javascript10
amazon-elasticsearch10
css10
refactor10
java10
javas10
elasticsearchquery10
aws-elasticsearch10
vue10
elasticsearch10
bit10
refactoring10
habits10
backend10
vue-jsx10
Programming languages (10)
Github contributions (5)
apache/james-project
Jan 2019 - Dec 2022
Emails at the heart of your business logic!
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3345 reviews, 678 commits, 893 PRs in 4 years
Contributions summary:René has been actively involved in migrating and refactoring the codebase to utilize ES6 syntax, indicating a focus on modernization and performance enhancements. They addressed checkstyle issues and made other minor code improvements, demonstrating a commitment to code quality and maintainability. The user contributed to creating new features, specifically around attachment handling and the incorporation of user-defined flags, which likely involved backend logic changes. Their work touches on core mail server functionality, indicating a deep understanding of the Apache James project.
mailsmtpemailbusiness-logicemails
HabitRPG/habitica
Aug 2018 - Dec 2018
A habit tracker app which treats your goals like a Role Playing Game.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:7 commits, 8 PRs, 78 comments in 4 months
Contributions summary:René primarily focused on improving the HabitRPG application's functionality and user experience. Their contributions included implementing accurate XP notifications, fixing a bug related to casting the Healing Light spell, and addressing an issue preventing new party members from joining quests. They also updated the home page's CSS font and fixed an achievement-related bug. The changes touched both front-end (Vue.js, CSS) and back-end (JavaScript) components, showing a full-stack development skillset.
trackerexpressvuereactjsrole
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