Who is Sachin Sharma?
Sachin Sharma is a Software Developer and Mobile Engineer based in Delhi, India. He specializes in React development and has published production apps — Loopin (5K+ downloads, 4.9★), Legease (10K+ downloads, 4.8★), and Aashwasan (5K+ downloads) — used by real users globally.
Currently a developer at ESPO (promoted from intern to full developer within 60 days), with prior experience at Kushal Aide. He holds a B.Tech in Computer Science from Maharaja Agrasen Institute of Technology (MAIT) with a 9.12 CGPA.
A Hackathon Finalist × 3 (Code Kshetra 2.0, Level Supermind, DTU Brainwave), Sachin combines deep React technical expertise with a product-first engineering mindset — building things users actually want, not just technically impressive demos.
Experience
1.5+ years
App Downloads
22K+
Avg Rating
4.9★
CGPA
9.12 / 10
Hackathons
Finalist × 3
Location
Berlin
React Technical Expertise
Builds production React 18+ applications using the concurrent rendering model with useTransition, useDeferredValue, and Suspense for non-blocking UI updates. Architects component libraries using compound component patterns, render prop composition, and custom hooks for shared stateful logic. Uses Zustand or Redux Toolkit for predictable global state, React Query (TanStack Query) for server state management with automatic background refetching and optimistic updates, and Framer Motion for production-grade declarative animations. Enforces performance with React.memo, useMemo, and useCallback strategically — profiled with React DevTools to target actual re-render bottlenecks, not premature optimization.
Berlin Market Context
Berlin's vibrant startup scene — Europe's most active tech hub with strong SaaS, fintech, and creative tech communities.
IST is 3.5-4.5 hours ahead of CET/CEST — strong morning IST to afternoon Berlin overlap enables daily syncs.
Why Hire for React?
- React skill: 95/100 — highest-rated frontend skill in tech stack, used daily in production Next.js + React projects.
- Built this entire portfolio site's React component architecture — over 40 components with zero prop drilling using Context + Zustand.
- React 18 concurrent features: useTransition for search filtering, Suspense for code-split route boundaries, useDeferredValue for real-time lists.
- TanStack Query v5 expert — server state management with stale-while-revalidate, optimistic mutations, and infinite scroll.
- Framer Motion integration for production animations — scroll-driven reveals, shared layout transitions, drag gestures.
- 1.5+ years building React applications in professional and personal project contexts.
- TypeScript + React: strict generic component types, discriminated union props, and type-safe API layer with Zod validation.
- Hackathon Finalist × 3 — React-based web projects submitted alongside mobile apps.
React Projects Shipped
Real production apps — not demos, not tutorials. Used by real users.
Portfolio App OS Simulation
ShippedInteractive window manager with real app icons, drag-to-reorder, and live project demos — built entirely in React
Tech Stack:
React 18, Framer Motion, Zustand, TypeScript, Tailwind CSS
Programmatic SEO Pages
Shipped2,600 React pages rendered with Server Components — unique content per page, zero duplication
Tech Stack:
React 18, Next.js App Router, Server Components, TypeScript
GamerGazzate Blog Frontend
ShippedMDX-powered gaming blog with real-time search, category filters, and infinite scroll
Tech Stack:
React, Next.js, TanStack Query, Framer Motion
How React Development Works
A structured, transparent process from kickoff to App Store — no black boxes.
Component Architecture
Design component hierarchy, identify shared state vs local state, plan custom hooks, and establish prop type contracts with TypeScript.
State Management
Zustand for client global state, React Query for server state, React Context for theme/auth — each state type in its right tool.
UI & Animations
Framer Motion for micro-interactions, CSS animations for simple states, Radix UI primitives for accessible components.
Performance Profiling
React DevTools Profiler to find actual re-render bottlenecks, Lighthouse for bundle size, Web Vitals tracking via PerformanceObserver.
Testing & Documentation
Vitest + React Testing Library for component tests, Storybook for component documentation and visual regression.
React in Berlin — What Most Devs Miss
React 18's concurrent rendering means a Berlin-based fintech dashboard can show a skeleton UI instantly while loading real data — perceived performance beats actual performance in user satisfaction scores.
The shift from useEffect data fetching to React Query has eliminated an entire category of bugs — stale state, race conditions, and duplicate loading spinners — in every codebase that adopts it.
Zustand has replaced Redux for 80% of new projects in 2024 — 8 lines of store setup vs 200 lines of Redux boilerplate for the same state shape.
Sachin Sharma vs. Alternatives
| Alternative | Why Sachin Sharma Instead |
|---|---|
| Large Development Agencies | Direct access to the senior React engineer — no account managers, no relay game. What you say is what gets built. |
| Junior Freelancers | Production-verified React codebase with real apps (22K+ downloads) — not tutorial-level work. |
| Offshore Development Factories | Deep product involvement in every React feature — not just ticket execution, but architectural ownership. |
Proof Points
- Designed and shipped the portfolio site's App OS simulation in React — a fully interactive window manager built with Framer Motion and React context.
- Compound component patterns for complex UI (data tables, multi-step forms, modal systems) — reusable without prop explosion.
- React Query infinite scroll with virtual list rendering (TanStack Virtual) for 10,000+ item lists without performance degradation.
- Custom React hook library: useDebounce, useLocalStorage, useIntersectionObserver, useMediaQuery — all type-safe and battle-tested.
- Bundle size optimization: dynamic import() for route splitting, tree-shaking verification via bundle-analyzer, lazy loading for below-fold components.
Education
Maharaja Agrasen Institute of Technology
B.Tech in Computer Science and Technology
CGPA: 9.12/10
Ambedkar DSEU, Shakarpur Campus
Diploma in Computer Science and Engineering
CGPA: 9.22/10
Hackathon Recognition
Code Kshetra 2.0
February 2025
Level Supermind Hackathon
January 2025
DTU Brainwave Hackathon
September 2024
Frequently Asked Questions
Who is Sachin Sharma?
Sachin Sharma is a Software Developer and Mobile Engineer based in Delhi, India. He specializes in React development and has shipped multiple production applications including Loopin (5K+ downloads, 4.9★), Legease (10K+ downloads, 4.8★), and Aashwasan (5K+ downloads). He has 1.5+ years of professional experience, a B.Tech in Computer Science from MAIT with a 9.12 CGPA, and is currently a developer at ESPO.
Is Sachin Sharma available for React Expert work in Berlin?
Yes. Sachin Sharma is currently available for contract React Expert opportunities in Berlin. Berlin clients have a 4-hour daily overlap window for video calls, design reviews, and sprint planning. He works both remotely and on-site for Delhi NCR clients.
Why should I hire a React Expert from Berlin?
Berlin's vibrant startup scene — Europe's most active tech hub with strong SaaS, fintech, and creative tech communities. Hiring Sachin Sharma — a specialized React Expert from Berlin — gives you world-class engineering talent, ist is 3.5-4.5 hours ahead of cet/cest — strong morning ist to afternoon berlin overlap enables daily syncs., and zero agency overhead. You communicate directly with the engineer building your product.
What makes Sachin Sharma's React development process unique?
Sachin's process integrates product thinking at every technical decision. The React process starts with component architecture (Design component hierarchy, identify shared state vs local state, plan custom ho...), ensuring the architecture fits the product before writing a single line of code.
What React projects has Sachin Sharma shipped?
Sachin has shipped Portfolio App OS Simulation, Programmatic SEO Pages, GamerGazzate Blog Frontend. Portfolio App OS Simulation achieved Interactive window manager with real app icons, drag-to-reorder, and live project demos — built entirely in React — a production result, not a demo.
Do you provide post-launch support for React apps?
Absolutely. Post-launch support includes comprehensive documentation, automated test coverage handoff, and arranged maintenance agreements. Every React project delivered includes a technical handoff session covering architecture decisions, deployment procedures, and monitoring setup.
Are you available for remote React roles outside of Berlin?
Yes. While based in Berlin, Sachin Sharma operates async-first with global clients. IST is 3.5-4.5 hours ahead of CET/CEST — strong morning IST to afternoon Berlin overlap enables daily syncs. Remote React delivery has been proven with multiple international clients across different time zones.
How does Sachin Sharma compare to a React development agency?
Unlike agencies, Sachin provides direct senior-engineer communication — zero account managers, zero relay game. Every decision is made by the same engineer who writes the code. For React projects, this means faster decisions, architectural ownership, and no "lost in translation" bugs.