Shubham Kumar

Shubham Kumar

Mentor
Rising Codementor
US$8.00
For every 15 mins
ABOUT ME

I’m a senior React Native engineer and mobile tech lead with 7+ years of experience shipping production iOS and Android apps end-to-end.

I help teams move from “almost ready” to store-ready, and then scale confidently with strong reliability, performance, and clean execution. I’ve worked across fast-moving product teams and large org environments, so I’m comfortable with both speed and process.
Clients and teams bring me in when they need someone who can take ownership and deliver without hand-holding whether that’s finishing v1, stabilizing a production app, or pushing v2 features with a scalable architecture.

What I’m best at
Codebase takeover + delivery: ramp up fast, understand architecture, unblock builds, close critical tickets, and ship releases
Mobile release engineering: signing/provisioning, versioning, TestFlight/internal testing, store submissions, and fixing review blockers
Performance + UX: profiling, reducing re-renders, optimizing list-heavy screens, caching, and improving responsiveness and startup behavior
Scalable architecture: modularization, clean boundaries, maintainable navigation/state/data patterns, feature flags, and safe rollouts
Reliability & debugging: crash triage, production issue root-cause analysis, monitoring/analytics integration, and pragmatic quality improvements

Typical work I handle:

Complex navigation flows, authentication/onboarding, API integrations, offline handling, deep links, push notifications, analytics & crash monitoring, subscriptions/payments, experimentation/feature flags, and CI/CD workflows (Bitrise/GitHub Actions-style pipelines).

How I work

I keep things simple and predictable: quick initial audit, clear milestones, small incremental PRs, and concise progress updates. I communicate tradeoffs early, focus on impact, and aim for clean, maintainable solutions that don’t slow future development.

Kolkata (+05:30)
Joined August 2021
EXPERTISE
2 years experience
7 years experience
7 years experience
4 years experience

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EMPLOYMENTS
Software Engineer 3
JP Morgan Chase & Co.
2025-08-01-Present

Currently developing the Chase UK app

Currently developing the Chase UK app

Android
Cursor
React
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Android
Cursor
React
React Native
GraphQL
iOS
FinTech
Mobile App Development
VS Code
AI
Copilot workspace
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Lead Software Engineer
CARS24 UAE
2023-08-01-2025-07-01

At CARS24 Arabia, I have led the transformation of the consumer app into a One Stop Used Car Solution Super App, expanding it beyond B...

At CARS24 Arabia, I have led the transformation of the consumer app into a One Stop Used Car Solution Super App, expanding it beyond Buy/Sell into multiple verticals in the UAE including Buy Car, Sell Car, Finance & Loans, Hire A Driver/Chauferly, Servicing and Car Valuations. The Super App was built using a micro-app architecture, and I had end-to-end ownership of 4 core micro apps. In this role, I combine technical leadership, cross-functional collaboration, and product vision to deliver scalable, high-performing mobile experiences while driving adoption, retention, and business growth.

Key Contributions:

Super App Architecture & Ownership: Designed modular navigation, dynamic bottom tabs, and cross-vertical integrations. Owned 4 micro apps, ensuring scalability, consistency, and future-ready growth across services.

Leadership: Participated in strategic technical discussions, led code reviews, and set engineering best practices to ensure high-quality, maintainable code. Mentored developers, improving team velocity by 35%.

Product Growth & Adoption: Partnered with marketing teams to integrate Branch deferred deep links, Google Ads, CleverTap automations, and attribution models across all micro apps. Introduced in-app events and advanced analytics hooks to optimize user acquisition, adoption, engagement, and retention.

Performance & Reliability: Achieved 99.9% crash-free sessions with Embrace instrumentation, reduced app bundle size by 40%, and worked on overall performance of the app to work at 60 FPS.

Testing & Analytics: Established an automated testing framework with Appium & Maestro. Built a centralized deeplink, A/B testing and analytics infrastructure enabling data-driven experiments and faster feature rollouts.

Recognised & awarded for Leadership in delivering the UAE Super App.

Android
SQLite
App Store
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Android
SQLite
App Store
TypeScript
Kotlin
JavaScript
Appium
React Native
Swift
iOS
Branch.io
Feature flagging
Play store management
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Software Engineer
MakeMyTrip
2021-07-01-2023-08-01

Working on Web/Mobile application of MakeMyTrip Hotels module.

Working on Web/Mobile application of MakeMyTrip Hotels module.

HTML/CSS
Git
Xcode
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HTML/CSS
Git
Xcode
React
JavaScript
React Native
Swift
Redux
GraphQL
Sass
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