I had the opportunity to work with Gens de Confiance, a leading platform that connects people, builds trust, and shares experiences.
I contributed to the mobile app for the vacation rentals business unit, focusing on performance improvements and user experience. The app serves over 500,000 monthly active users and is available on both iOS and Android platforms.

Challenges & Solutions

• Live changes: Managed production app releases for 500,000+ monthly active users, maintaining >99% uptime and ensuring smooth deployments across platforms.
  • With end-to-end testing still not ready, I had to be extremely cautious and manually test thoroughly before production releases.
  • Ran pre-QA test rituals to minimize regressions.
  • Used feature flags to enable gradual rollouts.
• Performance optimization: Reduced REST API calls and implemented a global CDN, cutting average response times by ~30% and improving app load performance for international users.
  • Cached data after initial bootstrap calls, refreshing only when the app returned from background.
  • Stored constant, non-sensitive data in S3 (JSON file).
  • Applied efficient data structures and algorithms to minimize processing time.
• Delivery within a legacy codebase: Delivered core mobile features for the Vacation business unit, enhancing user experience while navigating the constraints of a 10+ year-old codebase in a small team of four main developers.
  • Refactored only when new features touched existing code.
  • Wrote tests for new features and for any legacy code touched.
  • Prioritized incremental improvements over large-scale refactors.
• Cross-functional collaboration: Worked closely with product managers, designers, and backend developers to deliver high-quality features on time and within budget.
  • Maintained regular communication with the team.
  • Followed agile development methodologies.
  • Provided clear documentation and research for smooth handoffs.

Technologies Used

• React Native
• TypeScript
• Redux
• Redux-Saga
• Jest
• Fastlane (CI/CD)
• Github
• Linear
• Datadog
• Sentry
• AWS

Role

• Senior Mobile Development
• Performance Optimization
• Cross-functional Collaboration