Sarthak Gupta — Full Stack Developer & React Engineer in Delhi, India | Next.js, TypeScript, React Native Portfolio

SGSarthakGup.
Open to opportunitiesIND

Hi, I'm Sarthak.
I design & develop

A full stack developer and freelance React engineer specializing in Next.js, TypeScript, and modern web performance — delivering scalable e-commerce platforms, healthcare portals, and AI-powered applications from Delhi, India.

Explore WorkGet in touch
3+Years Exp
15+Projects
30%Latency ↓
Behind the Code

Productivity & Rhythm

Sarthak Gupta is a full stack developer based in Delhi, India (GMT +5:30). Core technologies include React, Next.js, Node.js, TypeScript, TailwindCSS, PostgreSQL, MongoDB, REST/GraphQL APIs, and Docker. Active on GitHub as SarthakGup05 with 580+ annual contributions. Available for freelance web development, React consulting, and full-time remote opportunities.

Core Technologies
React / Next.jsNode.jsTypeScriptTailwindCSSPostgreSQLMongoDBREST/GraphQLDocker
Tech Stack & Architecture
Building robust, scalable applications using modern stacks. Focused on clean separation of concerns and high-performance design patterns.
Local Time
ISTNew Delhi, India (GMT +5:30)
Located in Delhi, India
Working remotely with teams worldwide. Seamless communication across all time zones.
Professional Links
GithubTwitter / XLinkedIn
Active Connections
Open to conversations, developer meetups, and design-focused collaborations.
Currently Vibing
Deep Focus BeatsAmbient / Lo-Fi Focus
Flow State Focus
Music feeds creative productivity. Typically listening to ambient lofi or synthwave during focus hours.

GitHub Contribution Rhythm

Commit workflow history for SarthakGup05

View Profile
Dev Analytics
Contributions (Yearly)580 Commits
Peak Focus HoursLate Night (9 PM - 2 AM) 🌌
Preferred SetupVS Code • WSL2 • Tokyo Night
Status: ActiveRef: SG-05
Timeline History

Professional Journey.

A timeline of my internships, key projects, and technical milestones defining my path as a developer.

Late 2024

Full Stack Developer Intern

@ Digital Nawab (Lucknow)
Completed

Engineered end-to-end features for commercial web applications. Reduced system API response latency by 30% through strategic Redis caching and query optimizations.

Metrics Dashboard
API Response Time120ms (↓ 30%)
Deploy Status Success
Docker & AWSZustand State MgmtHigh-Volume REST APIsNodeJS Performance

Mid 2024

Commercial Freelance Work

Delivered custom production-ready digital architectures for commercial clients.

Aditi Tours
98 Performance
Aditi Tours

Next.js • SSR Optimization • Dynamic Maps

Jaya Photography
AWS Storage
Jaya Photography

Next.js • AWS S3 Integration • Media Optimization

Early 2024

AI Recommendation Systems

Architected a cross-platform mobile app leveraging LLM intelligence.

Cross-Platform
React Native Hub

Optimized rendering and async state across mobile targets.

AI Logic
GenAI Recommendations

Integrated Mood Analysis and recommendation prompts using OpenAI APIs.

Education & Badges

Academic Credentials
GraduationB.Sc. in Scientific ComputingKanpur University
Professional Badges
Generative AI for DevsFull Stack BootcampDSA in Java

SELECTED
WORKS.

A showcase of 15+ commercial platforms, e-commerce stores, healthcare portals, AI-driven applications, and scalable full stack solutions built with Next.js, React, and TypeScript.

2026Web Application

E-commerce Website

Developed a responsive e-commerce website using Next.js with Server-Side Rendering (SSR) for superior SEO performance and fast load times.

Next.jsSSRSEOCloud Hosting
Screenshot of E-commerce Website - Web Application
2025Booking Platform

Aditi Tour & Travel

Developed a high-speed booking platform using Next.js with Server-Side Rendering (SSR) for superior SEO performance and fast load times.

Next.jsSSRSEOCloud Hosting
Screenshot of Aditi Tour & Travel - Booking Platform
2025Media Showcase

Jaya Photography

Built a media-heavy portfolio site utilizing AWS S3 for efficient image hosting and retrieval, ensuring high performance for visual content.

ReactAWS S3Media Optimization
Screenshot of Jaya Photography - Media Showcase
2024Healthcare Portal

Kosmic Dental

Designed modular UI components and integrated backend booking systems to streamline patient appointments and management.

UI/UX DesignBackend IntegrationModular Components
Screenshot of Kosmic Dental - Healthcare Portal

Client testimonials for Sarthak Gupta, a top-rated full stack developer. 100% satisfaction rate across 15+ long-term projects including e-commerce platforms, healthcare scheduling portals, commercial booking apps, and AI dashboards. Average client rating: 5.0 stars. 60% average website performance improvement through Next.js SSR and optimization techniques. Trusted by startups, healthcare providers, photographers, and tech companies across India.

Client Testimonials

CLIENTS &
COLLABORATION.

Real-world success stories, impact metrics, and feedback from recent projects and partnerships.

100%

Satisfaction Rate

Based on 15+ long-term projects

40+

Completed Projects

Startups, healthcare, & e-commerce

60%

Average Speedup

Through Next.js SSR & optimizations

5.0 ★

Average Rating

Top-rated developer across clients

+35% Sales Growth

"Sarthak transformed our online store. Our page load speeds improved by 60% and sales saw a 35% bump in the first month. An absolute wizard with Next.js and Server-Side Rendering!"

SJ

Sarah Jenkins

Founder, Uphaar E-commerce

10k+ Bookings Processed

"The commercial booking platform is incredibly fast and intuitive. Our customers love the seamless scheduling, and our team has saved countless admin hours."

RM

Rajesh Mehta

Director, Aditi Travels

99.9% Media Uptime

"As a photographer, visual quality and speed are everything. Sarthak built an AWS S3 media portfolio that loads instantly and showcases my photos in stunning high resolution."

JS

Jaya Sharma

Creator, Jaya Photography

-40% Admin Delay

"The custom healthcare scheduling portal Sarthak built completely solved our booking bottlenecks. Patient onboarding is now 100% digital and frictionless."

DAV

Dr. Amit Verma

Chief Orthodontist, Kosmic Dental

2.5x User Engagement

"Sarthak integrated our LLM pipeline into a beautiful interactive agent dashboard. His expertise in prompt engineering and GenAI user flows is top-tier."

ER

Elena Rostova

CTO, SynthAI Labs

Fast delivery & exceptionally clean code!
Next.js and React wizard.
Highly professional communication throughout.
Exceeded all project requirements!
Highly recommended for full-stack Next.js projects.
Very clean database schemas and API integrations.
Great experience working together on React Native.
Incredible attention to detail in UI design.
Solved our scaling issues overnight.
Excellent prompt engineering skills!
Excellent prompt engineering skills!
Solved our scaling issues overnight.
Incredible attention to detail in UI design.
Great experience working together on React Native.
Very clean database schemas and API integrations.
Highly recommended for full-stack Next.js projects.
Exceeded all project requirements!
Highly professional communication throughout.
Next.js and React wizard.
Fast delivery & exceptionally clean code!

Technical Expertise

My Stack.

Technical skills: React.js, Next.js, React Native, TypeScript, JavaScript, Node.js, Express.js, MongoDB, PostgreSQL, AWS, Docker, Generative AI, NativeWind, GSAP, Redux, Zustand, Prompt Engineering, Vercel, Tailwind CSS, REST APIs, GraphQL, Server-Side Rendering, Static Site Generation, Web Performance Optimization, CI/CD, Git, Responsive Web Design, UI/UX Development, Headless CMS, E-commerce Development, Agile Methodology.

  • React.js
  • Next.js
  • React Native
  • TypeScript
  • Node.js
  • Express.js
  • MongoDB
  • AWS
  • Docker
  • Generative AI
  • NativeWind
  • GSAP
  • Redux
  • Prompt Engineering
  • Vercel
  • React.js
  • Next.js
  • React Native
  • TypeScript
  • Node.js
  • Express.js
  • MongoDB
  • AWS
  • Docker
  • Generative AI
  • NativeWind
  • GSAP
  • Redux
  • Prompt Engineering
  • Vercel