Nick Popov

Senior software developer — React Native & full stack. 9 years shipping fintech, health and IoT apps; led teams of up to 10; 10+ apps in the App Store and Play Market.

Valencia, Spain · remote · cosat20@gmail.com

What I do

High-performance mobile UIs with complex animations and gestures, native modules when JS is not enough, and the backend that feeds them. I work best as the person who owns a product end to end: architecture, releases, performance, and the conversation with the client.

Selected work

Fintech platform (NDA) 2024 – now

Full stack — Node.js, React, React Native

  • Deposit/withdraw flows and third-party integrations on a platform processing $1B+ over two years.
  • Grew the engagement from 1 to 8 developers; releases across React Native, React SPA and Remix for 3,000+ DAU.
  • Cut mobile RAM usage by 40% through profiling and render optimization.

IoT fleet platform (NDA) 2023 – 2024

Python + React Native

  • Modbus protocol bridge for in-car equipment across a 10-vehicle fleet.
  • Native Android components with Mapbox; Django backend; Docker on VPS.

WayWiser 2022 – 2023

Senior React Native

  • 2× overall app performance (up to 3× on specific screens).
  • Migrated Expo → React Native CLI, built the CI/CD pipeline, led a full UI redesign.

Skoove 2020 – 2021

Senior React Native

  • Music-learning app with 1M+ installs: UI redesign, native modules, stability work.

eForce 2018 – 2020

React Native, from scratch

  • Cybersport streaming app, 100k+ installs, including the live video-streaming feature.

Stack

Core
React Native · React · TypeScript · Node.js · GraphQL · Expo · Remix
Native
Swift / SwiftUI · Kotlin / Jetpack Compose · Objective-C · native modules
Backend
Node.js · Python / Django · PostgreSQL · Redis · Docker · CI/CD