I'm Praveen Singh, a Senior React Native engineer with 5+ years shipping scalable Android and iOS apps across fintech, edtech and telecom, from architecture to App Store.
Production apps for Android and iOS. Numbers are from release builds and production telemetry.
upGrad · 2025
The learning app for upGrad's global learner base. Adaptive-bitrate course video through native Swift and Kotlin modules, offline downloads with encrypted storage, and CodePush for fixes without a store release.
Read the case study: upGrad LearningScreenshots and ratings from the public store listings.
Gojoko Technologies · 2024
A credit card app for a UK fintech: card management, transactions and payments, with Visa 3-D Secure, biometric sign-in and hardening against the OWASP Mobile Top 10.
Read the case study: ReevoThe card product has since been retired. Numbers are from its production builds.
Delightree · 2026
Franchise operations for 150+ brands. Offline-first audits with photo capture and queued sync, AI-powered SOP search, and checklists moved to FlashList to kill scroll jank.
Read the case study: Delightree
DelightreeProductivityScreenshots from the public store listing.
Invia · 2025
An enterprise telecom app for real-time usage, billing and alert monitoring, built to security compliance on a tight timeline.
Read the case study: Invia TelecomEnterprise app distributed privately, so it isn't on public app stores.
WebMobril Technologies · 2021 to 2023
8 to 10 production apps for agency clients across e-commerce, NFC and IoT, most of them needing native code alongside React Native.
Read the case study: Client apps: payments, NFC and BLEPayments · Stripe checkout with saved cards and refunds.
NFC · Tag-based authentication through a custom Kotlin module.
BLE · Real-time control of connected hardware, like the kookooVoice toy.
Built for agency clients, who own and publish the apps, so most aren't linked here.
kookooVoiceTalking toy over BLEScreenshots from the public store listing.
5 items
Senior React Native Engineer · Noida, India
Mar 2026 to Aug 2026
Remote
Jan 2025 to Feb 2026
Noida, hybrid
Nov 2024 to Jan 2025
Noida
Aug 2023 to Sep 2024
Noida, on-site
Sep 2021 to Aug 2023
Noida
B.E., Computer Science and Engineering
Priyadarshini Bhagwati College of Engineering, Nagpur, 2013 to 2017
Last login: on this website. Type "help" to look around.
How I work
Domain-driven module boundaries, local-first sync for unstable networks, and typed API contracts with normalised errors.
Release-mode FPS and render profiling, startup instrumentation with regression alerts, list virtualisation and deferred rendering.
Swift and Kotlin modules for video, NFC and BLE, plus React Native version upgrades and New Architecture adoption.
Fastlane lanes for repeatable releases, GitHub Actions quality gates, and OTA updates for fixes that can't wait for review.
Crashlytics, Sentry and Datadog watching every release, and rollback-first playbooks so a bad build is a non-event.
From the blog
I exposed a React Native app's actions to Siri with expo-app-intents, measured three designs with the app closed, and hit a SQLite bug that silently lost data. Plus what Android's AppFunctions will need.
Senior React Native Engineer
I enjoy the hard parts of mobile: React Native upgrades and New Architecture migrations, native integrations, production memory leaks, and lists that have to scroll smoothly on a cheap Android phone. I build apps that stay scalable, reliable and fast long after launch.
“I had the opportunity to work with Praveen Singh on multiple projects, and he consistently demonstrated a strong work ethic and excellent development skills. His working style is structured, proactive, and focused on delivering quality results. Praveen has solid experience in React Native, JavaScript, and TypeScript, and he handles complex features with confidence. … I highly recommend Praveen for any mobile development role where ownership, quality, and reliability are important.”
Managed Praveen directly
“…although he is humble for everyone if the problem is given to praveen it's already been solved”
Reported to Praveen
“Praveen has very good skills set in terms of logic in javascript and react native. He is good to resolve any issue in coding. …”
Same team
Quick answers
Praveen Singh is a Senior React Native engineer based in Noida, India, with 5+ years building Android and iOS apps. He has shipped apps for upGrad, Delightree, Gojoko Technologies (the Reevo credit card), Invia and agency clients at WebMobril Technologies.
Yes. Praveen is open to Senior React Native and mobile roles and to consulting, and can join immediately. He works remote, hybrid or on-site from Noida (Delhi NCR).
Praveen worked on the upGrad learning app (rated 4.6 on the App Store from 8.2K ratings), upGrad Living, Delightree's franchise operations app, the Reevo credit card app for a UK fintech, an enterprise telecom app for Invia, and 8 to 10 agency apps including kookooVoice, a talking toy controlled over Bluetooth.
Yes. Alongside React Native and TypeScript, Praveen writes Swift and Kotlin modules: Brightcove video playback at upGrad, NFC tag authentication and Bluetooth Low Energy device control for agency clients. He also handles React Native upgrades and New Architecture adoption.
At upGrad, Praveen cut median cold start from 2.9s to 1.8s and the release cycle from 5 days to 3. On the Reevo credit card app, API responses got about 30% faster with Apollo caching and frame drops fell from 9.2% to 3.8%.
Email praveen.codeit@gmail.com or message Praveen on LinkedIn at linkedin.com/in/praveens2. He replies within 24 hours.