Delhi, India · Available worldwide, remote-first

Best Software Developer — Building High-Fidelity Responsive Products

Sachin Sharma is a top-rated Software Developer based in Delhi, India, specializing in high-performance web and mobile app development (Flutter, React Native, Next.js). With professional engineering experience at ESPO, he delivers highly optimized, scalable, and modular software solutions directly to startups and enterprises.

I know you want to build something great with Software Development.

There are 10 lakh+ agencies, 5 crore+ "vibe coders," and 1 crore+ developers out there — and somehow you ended up on this page. That's not an accident, that's a genuine signal. I'm 21, and if you're on my website right now, you're already looking at someone better than most of what's out there. I'd genuinely prefer to talk to you directly rather than have you read through another page. Please feel free to call, message, or email — whichever works best for you.

Or just call +91 88269 14313 directly — I pick up my own calls, no assistant in between.

Or just see what I've built first

At a Glance

Target Ecosystems

iOS, Android, Web (Desktop & Mobile)

Preferred Languages

TypeScript, Dart, Go (Golang), SQL

Product Lifecycle

Figma translation, local dev, CI/CD, store listing, monitoring

Frontend Frameworks

React, Next.js, Flutter Web/App

Preferred Backend Foundations

Node.js, Express, Go REST APIs

Database Systems

PostgreSQL, SQLite, Firebase Firestore

Testing Strategy

Unit, Widget, and End-to-End integration tests

App Delivery Store

App Store Connect, Google Play Console, Web deployment

On This Page

~7 min read

1. Clean Code Standards & Modular Codebase Design

2. Translating Designs: Figma to Responsive Design Systems

3. Full-Lifecycle Store Operations: App Store & Play Store

4. Cross-Platform Strategy: Flutter vs. React Native Decisions

5. Internal SEO Maps: Localized Dynamic SEO Cluster Systems

6. Shipped Case Study: Hand-on Product Execution

Sachin Sharma vs. Alternatives

How working with me directly compares to agencies and general freelancers.

Metric	Sachin Sharma	Agencies	Freelancers
Who you talk to	Me, directly. The person writing your code answers your messages.	Account managers and PMs relay your feedback to developers you never meet.	Variable — depends who you find, timezone gaps are common.
What you get	Production apps built end-to-end, not prototypes or tutorial-grade demos.	Junior developers rotated onto your project; senior oversight is inconsistent.	Often strong at scripts and one-off scripts, less so at shipping to production.
Performance work	Real optimization: shader precompilation for 60fps Flutter, Edge SSR under 50ms TTFB, bundle budgets enforced.	Standard boilerplate setup, rarely tuned past 'it works'.	Performance tuning usually skipped unless explicitly (and separately) paid for.
Code ownership	Fully typed, documented codebase. Full git history handed over on day one.	IP clauses and handover friction are common.	Documentation and typing discipline vary a lot person to person.

Frequently Asked Questions

Why should we hire a developer directly instead of using a traditional agency?

Direct collaboration removes account managers, sales representatives, and communication layers, providing fast iterations, clean code, and direct technical consulting at lower rates.

How do you ensure web products load fast on mobile devices?

I compress images to WebP format, implement dynamic code-splitting to lazy-load routes, configure edge server rendering, and audit Core Web Vitals to keep load times under 200ms.

What is your approach to handling app store updates?

I configure Fastlane pipelines for automated store uploads and integrate OTA engines like Shorebird to patch bugs instantly without waiting for app store reviews.

Can you build offline-capable web and mobile applications?

Yes. I build local storage cache layers using databases like SQLite, Drift, or Hive, allowing apps to function offline and sync changes when a connection is restored.

How do you manage UI design changes during development?

I build tokenized, modular design systems. UI changes are applied by updating token variables, updating all referencing elements automatically.

What is the difference between MVVM and MVC architectures?

MVC handles interactions through a centralized controller, while MVVM binds UI layouts directly to data models, keeping frontend views stateless and easy to test.

What is CSS Houdini and how does it optimize animation performance?

CSS Houdini allows developers to write custom rendering code directly for the browser's painting engine, bypassing layout steps and speeding up animations.

How do you sync local certificates across developers?

I use Fastlane Match. It encrypts and stores certificates in a private Git repository, syncing profiles across team developers automatically.

How do you choose between building Web and Mobile layouts?

I recommend web applications for fast user onboarding, and mobile apps when the product requires offline database storage, push alerts, or access to system APIs.

What is dynamic code splitting in React?

Code splitting divides compiled scripts into smaller chunks. The client loads scripts only when visiting their specific pages, lowering initial page load times.

How do you secure user storage in mobile applications?

I encrypt local database files using SQLCipher keys, and store security tokens inside the hardware iOS Keychain or Android Keystore.

What is the role of design tokens in software systems?

Design tokens store style values (like margins, colors, and fonts) in structured JSON configurations, keeping styles consistent across web and mobile platforms.