Andrew Concepcion
[search /]

[résumé]

Andrew V. Concepcion

AI-native software engineer. Android, iOS, backend, and shared Rust.

AI-native software engineer with deep platform knowledge and 10+ years of experience shipping production systems across crypto, fintech, streaming, telecom, transport, rewards, safety, and e-commerce. Strong in Kotlin, Jetpack Compose, mobile architecture, performance tuning, release hardening, and third-party integrations. Known for agent-first execution, strong engineering judgment, and moving effectively across Android, iOS, backend, product, and design to ship reliable user-facing systems.

Download PDF Email me

[01 / at a glance]

Career at a glance

Seven teams since 2014, sized by time in each role. Select one to jump to it.

  1. ISBX2014
  2. YOYO Holdings2016
  3. iPARA2018
  4. Innovation­Team2020
  5. Red Airship2021
  6. Candy­space2023
  7. Bitcoin.com2024

[02 / experience]

Experience

— Present

2 yrs 4 mos

AI-Native Software Engineer

Bitcoin.com

  • Bitcoin.com Wallet — Self-custody crypto wallet
  • Led the foundation and first end-to-end Android implementation of a multichain rewards platform, then built reward-backed crypto market predictions and moved their service layer into shared Rust through UniFFI.
  • Co-built Bitcoin replace-by-fee with fee-aware UTXO validation, speed-up/cancel flows, reusable transaction preparation and signing, opt-out controls, and dust protection; led an in-app single-chain-to-multichain wallet migration.
  • Modernized staking and liquidity-reward pool reads from legacy RPC to typed REST, shipped provider-aware swap routing and recurring-buy reminders, and hardened startup, native builds, CI, and Android releases.
  • Android
  • Rust + UniFFI
  • Multichain wallet
  • Bitcoin transactions
  • Release hardening

Read the case study Bitcoin.com Wallet on Google Play (opens in a new tab)

—

1 yr

Senior Mobile Developer

Candyspace

  • ITVX — Streaming platform
  • Built a recommendations panel that appears during playback, coordinating its animations with player-control and button movement across phone and tablet layouts.
  • Independently delivered timeline scrubbing with a visual preview so viewers could see where playback would land before seeking.
  • Fixed long-standing player issues and improved reliability with stronger error tracking, security fixes, and a Simple XML-to-Jackson migration.
  • Android
  • Playback UI
  • Scrubbing previews
  • Tablet layouts
  • Reliability

Read the case study ITVX on Google Play (opens in a new tab)

—

2 yrs

Senior Android Developer

Red Airship

  • OCBC — Mobile banking
  • OpenPay — Fintech
  • Built and launched OCBC Business mobile banking flows spanning onboarding, account dashboards, transfers, and digital account opening.
  • Integrated third-party SDKs, refactored selected modules to reduce coupling, and improved unit-test coverage for critical fintech flows.
  • Improved OpenPay checkout reliability, UI responsiveness, partner-integrated payment flows, and release hardening.
  • Android
  • Business banking
  • BNPL checkout
  • SDK integration
  • Unit testing

OCBC case study OpenPay case study OCBC Business on Google Play (opens in a new tab)

—

1 yr 1 mo

Lead Developer

InnovationTeam

  • MySTC — Telecom project
  • Led an offshore team of five senior Android engineers on MySTC, serving 10M+ installs across multilingual customer journeys.
  • Drove Clean Architecture and MVVM adoption with RxJava and RxKotlin, improving modular boundaries and release confidence.
  • Delivered performance, stability, and data synchronization improvements across account, ordering, and support flows.
  • Team leadership
  • Clean Architecture
  • MVVM
  • RxJava + RxKotlin
  • Multilingual

Read the case study

—

1 yr 11 mos

Team Lead

iPARA Technologies and Solutions

  • OWTO — Ride-hailing service
  • Led cross-functional delivery across Android, iOS, and backend for a ride-hailing platform that grew to 500K+ downloads.
  • Architected the mobile app with Uber RIB-inspired patterns to support modular growth and clearer ownership boundaries.
  • Improved booking reliability, payment-path handling, and backend API coordination for real-time transport flows.
  • Android
  • iOS
  • Backend APIs
  • RIB-inspired architecture
  • Real-time transport

Read the case study

—

2 yrs

Senior Android Developer

YOYO Holdings Pte. Ltd.

  • PopSlide — Rewards platform
  • Led Android development for a rewards app with 1M+ downloads across Southeast Asia.
  • Migrated large Java surfaces to Kotlin, reduced regressions in fragile areas, and shipped safer feature rollouts through A/B testing and guardrails.
  • Improved API and caching behavior while keeping monetization-critical lockscreen and notification surfaces stable.
  • Android
  • Java to Kotlin
  • A/B testing
  • Caching
  • Lockscreen surfaces

Read the case study

—

2 yrs 1 mo

Full-Stack Web and Mobile Developer

Internet Strategy Branding and Execution (ISBX)

  • WebSafety — Parental controls
  • Delivered end-to-end features for WebSafety across Android, iOS, web, and backend systems.
  • Worked through undocumented Android APIs, GPS and sync reliability, and security-sensitive feature requirements.
  • Helped ship a robust parental-controls platform with stronger operational and compliance posture.
  • Android
  • iOS
  • Web
  • Backend
  • GPS + sync

Read the case study

[03 / toolkit]

Skills

Android

  • Kotlin
  • Java
  • Jetpack Compose
  • XML layouts
  • Android SDK
  • Coroutines
  • Flow
  • RxJava
  • RxKotlin

Architecture & quality

  • Clean Architecture
  • MVVM
  • Modularization
  • SDK integration
  • Unit testing
  • CI/CD
  • Release hardening
  • Performance tuning

Cross-platform & adjacent

  • Compose Multiplatform
  • Kotlin Multiplatform
  • Rust
  • UniFFI
  • SwiftUI
  • Swift
  • Firebase
  • Retrofit
  • SQLite
  • REST APIs

Hiring for a mobile or platform role?

Send me a note, or take the one-page PDF for your hiring team.

Email me Download PDF See the portfolio