Crafting Premium
Mobile Experiences.
Mobile Engineer dedicated to building premium, high-performance Android & iOS applications. Specialist in scalable architecture and seamless user experiences across the fitness, ecommerce, and telecom sectors.
Who I Am
Lester Narvasta
Mobile Engineer · Android & iOS
Self-taught engineer dedicated to crafting premium mobile experiences across the fitness, e-commerce, and telecom industries. Focused on building Connected Fitness and scalable wellness platforms.
When I’m offline, I recharge in the mountains—nature is my reset button and source of quiet inspiration.
Core Tech Stack
Selected Case Studies
Unified Commerce Platform
Spearheaded development of a flagship shopping app catering to millions of users. Engineered robust native experiences prioritising speed, secure payments, and a frictionless checkout.
- Architected native pipelines connecting massive localised product catalogs with real-time inventory sockets.
- Established a rigid CI/CD automated testing matrix — crash-free sessions improved to 99.9%.
- Mentored junior devs by instituting Clean Architecture & MVVM across the entire mobile team.
Telecommunications Dashboard
Developed core telecom tracking & customer dashboard apps. Migrated heavily fragmented legacy configurations into a unified, modular architecture.
- Full migration of a legacy Java codebase to pure Kotlin using modern Coroutines and Flow.
- Implemented real-time billing and usage tracking widgets with intensive background data sync.
- Optimised app payload by 30% via advanced ProGuard rules and resource modularisation.
Fitness Tracking Companion
Launched a successful fitness tracking app reaching 100k+ downloads. Deeply integrated with persistent device hardware sensors without draining battery life.
- Engineered highly accurate persistent background location tracking using fused location providers.
- Developed complex mathematical smoothing algorithms for the pedometer syncing with accelerometers.
- Built real-time WebSocket connections for live community leaderboards.