Available for high-impact projects

Building Premium
Mobile Experiences.

Mobile Engineer crafting high-performance Android & iOS applications. Specialist in scalable architecture and seamless user experiences across fitness, ecommerce, and telecom.

View My Work

GitHub

Good morning, Lester 👋 Daily activity — Tuesday

12,480 steps 77% of daily goal

8.2 km Distance

642 kcal

118 bpm avg

Jetpack Compose

SwiftUI

Kotlin

Firebase

Bluetooth · BLE

8+Years Experience

100k+App Downloads

99.9%Crash-free Sessions

LimaBased in Peru 🇵🇪

What I've Built

Selected Engineering Experiences

Mobile Commerce & Logistics

Delivery Platform

Multi-tenant delivery & commerce ecosystem connecting restaurants, couriers and customers — order management, logistics, payments and business intelligence across multiple markets.

Led Android architecture and platform evolution
Real-time order & delivery tracking with GraphQL data layers
Thermal printer & POS integrations, offline-first reliability

400+ businesses · 99.9% platform stability

KotlinJetpack ComposeGraphQLFirebase

Bluetooth, Wearables & IoT

Fitness Platform

Mobile apps connecting fitness equipment, wearables and biometric sensors for real-time workout tracking, athlete insights and connected fitness experiences.

BLE communication protocols, device discovery & pairing
Concept2 PM5, treadmills, rowers & indoor bikes
Apple Watch & Polar heart-rate integrations

Real-time metrics from connected hardware

KotlinBLEApple WatchPolar SDK

Enterprise Mobility & Field Operations

Telecom Operations

Enterprise mobile solutions for large-scale telecom environments — infrastructure monitoring, incident management and real-time critical information for distributed field teams.