Vishwas Parashar — React Native Performance & Architecture

React Native Performance Specialist

Your React Native app
shouldn’t feel slow.

I help companies fix underperforming, unstable, and poorly architected React Native apps. 8+ years. Production experience. No reckless rewrites.

Lags on basic screens

Unnecessary re-renders

3–5 second load times

Messy Redux state

Random crashes

Impossible to scale

→ Book a Performance Audit See What I Fix

The Problem

Most RN apps don’t fail
because of bad ideas.

They fail because of poor structure. I’ve seen the same patterns destroy app performance across dozens of codebases.

STRUCTURE_001

3000+ line screens with no separation of concerns

STATE_002

Entire Redux state passed as props through every component

HOOKS_003

Infinite useEffect loops triggering on every render cycle

RENDER_004

Network calls triggering unnecessary downstream re-renders

BUNDLE_005

Bloated bundle sizes and native module conflicts

CICD_006

CI/CD bundle inconsistencies breaking production builds

FORMS_007

Firebase-heavy dynamic forms freezing the entire UI thread

SCALE_008

The app “works” — but it’s slow, fragile, and painful to maintain

The real cost: Your team spends 60% of sprint time on bugs instead of features. Every new engineer who joins is afraid to touch certain files. And your users are leaving silent 1-star reviews.

What I Do

Performance recovery &
architectural cleanup.

I specialize in production React Native apps that need to work better — not be rebuilt from scratch.

🔍

Performance Diagnostics

Re-render analysis & visualization
Memory usage profiling
Bundle size investigation
Network & async bottleneck detection
JS thread vs native thread attribution

🧠

Architecture Refactoring

Clean state management design
Separation of concerns enforcement
Custom hooks extraction
Single source of truth redesign
TypeScript restructuring

⚡

Performance Optimization

Eliminate unnecessary renders
Lazy loading & memoization strategies
Optimized async flows
Native bridge performance tuning
FlatList & ScrollView optimization

🏗

Stability & Scalability

Modular code structure
Production-grade patterns
CI/CD build alignment
Native module cleanup
Crash diagnostics & resolution

My rule: I don’t patch symptoms. I fix foundations. Your codebase should be cleaner after I’m done than before I started.

Real-World Experience

Problems I’ve already
solved in production.

Not theory. Not tutorials. These are actual engagements with real business pressure and real users on the line.

01 Refactored a 3,500-line production screen into maintainable, testable modules without disrupting live users Architecture

02 Fixed excessive re-render cycles caused by Redux prop over-passing across deeply nested component trees Performance

03 Designed a clean architecture sync system for Last Listening Position (LLP) in a large media application Architecture

04 Optimized heavy Firebase-driven dynamic forms that were freezing the UI thread during input Performance

05 Debugged and resolved bundle generation conflicts causing inconsistent behavior in CI/CD pipelines DevOps

06 Improved download performance in large media-based applications with complex async queue management Performance

07 Resolved native module integration failures after React Native version upgrades and dependency changes Native

My Approach

How I work.

Careful diagnosis before any code change. Incremental refactoring that doesn’t break production.

Step 01

Diagnose deeply before touching code

I use Flipper, React DevTools, and custom profiling to understand exactly what’s slow and why — before making any changes.

Step 02

Identify root causes, not surface issues

A slow screen is usually a symptom. The root cause is often architecture, data flow, or render strategy — I find that.

Step 03

Refactor incrementally — no reckless rewrites

Every change is targeted. I work alongside your team, fitting into your sprint structure without blocking releases.

Step 04

Improve performance without breaking production

I understand the business pressure. Your app cannot be down. Everything ships tested and verified.

Step 05

Leave your codebase cleaner than I found it

When I’m done, your team should feel relief — not fear — when opening those files again.

About

I’m Vishwas Parashar.

Senior mobile engineer with 8+ years of experience in React Native and native mobile ecosystems. I’ve worked across startups and scaling teams where performance isn’t optional — it’s the product.

I focus on clean architecture, performance-first thinking, and maintainable systems that your whole team can work in comfortably. I’m not here to impress you with complexity — I’m here to make your app fast and your codebase sane.

I enjoy solving complex, messy problems. Especially when others have already struggled with them. The harder the architecture problem, the more interesting the work.

Years React Native

Core specializations

Reckless rewrites

∞

Messy codebases fixed

Let’s Fix Your App

If your app is live
and struggling — we should talk.

Start with a performance audit call. I’ll ask about your app, identify the most likely bottlenecks, and tell you honestly whether I can help. No commitment required.

→ Book Audit Call Send App Details

Usually respond within 24 hours

Home

Your React Native appshouldn’t feel slow.

Most RN apps don’t failbecause of bad ideas.

Performance recovery &architectural cleanup.

Problems I’ve alreadysolved in production.