Louis Lagrange
Freelance Software Engineer at Louis Lagrange
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolLouis Lagrange is a Paris-based freelance software engineer with 17 years of experience building mobile apps and back-end APIs, available for short to mid-term remote contracts. He blends hands-on mobile development (React Native, native iOS/Android) with backend architecture (Node.js, PHP, GraphQL, PostgreSQL) and cloud platforms (GCP, AWS, Firebase), and often leads performance and code quality audits to improve developer experience. A pragmatic contributor to notable open-source projects—such as enhancing payload encryption in web-push-php and refactoring core components of FOSRestBundle—he brings a strong emphasis on security, testing, and maintainability. Beyond implementation, he supports teams with developer training, technical recruitment, GDPR audits and integrations ranging from payments to AR/VR, showing a rare mix of product-minded engineering and operational rigor.
16 years of coding experience
5 years of employment as a software developer
Baccalauréat with major in mathematics and engineer science, German language European section, Baccalauréat with major in mathematics and engineer science, German language European section at Lycée RichelieuLycée Janson de SaillyEngineer’s Degree, Engineer’s Degree at Ecole nationale supérieure d'Arts et Métiers
French, English, German
Stackoverflow
140reputation
4kreached
3answers
1question
Github Skills (24)
javascript10
react-native10
mobile-development10
animation10
testing10
request-handler10
phpunit10
php10
openssl10
symfony10
symfony-ux10
rest-api10
encryption10
react10
push-notifications9
Programming languages (20)
Github contributions (5)
lottie-react-native/lottie-react-native
Mar 2018 - Aug 2018
Lottie wrapper for React Native.
Role in this project:
Mobile Developer
Mobile DeveloperContributions:21 commits, 5 PRs, 8 comments in 5 months
Contributions summary:Louis primarily contributed to the React Native library by implementing new features and fixing bugs related to the Lottie animation integration. They added the `autoSize`, `autoPlay`, and `duration` properties to the `LottieView` component. The user also addressed issues in the example application, including fixing a pause button, resetting the animation when the API was switched, and ensuring that the animation source updates correctly.
reactafter-effectsreact-nativeandroidios
FriendsOfSymfony/FOSRestBundle
Aug 2015 - Aug 2015
This Bundle provides various tools to rapidly develop RESTful API's with Symfony
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 commits, 1 PR, 2 comments in 1 day
Contributions summary:Louis primarily focused on refactoring and improving the `ParamFetcher` class, a core component of the FOSRestBundle, which is used for fetching parameters in RESTful API requests. Their work involved addressing code quality issues identified by static analysis tools like SensioLabs Insight, specifically related to dependency injection and request handling. The commits also included fixing documentation annotations and minor formatting issues to enhance code maintainability.
apibundlephpsymfony-bundleapi-s
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