Hi, I'm Sameer

I'm a Full Stack Developer Crafting Seamless User Experiences,
Passionate about Code, Create, and Collaborate.

// 01. INTRODUCTION

Full-Stack & Mobile Architecture

Engineering Philosophy & Overview.

I am a skilled Full-Stack Software Engineer with extensive production experience in TypeScript and JavaScript, specializing in building high-scale web platforms, fluid mobile applications, and resilient microservices using React, Next.js, React Native, Node.js, Redis, and Three.js.

I take pride in translating complex business problems into elegant, maintainable code architectures. Whether architecting high-throughput REST APIs with sub-second response times, implementing granular RBAC security models, or engineering interactive cross-platform mobile experiences, I deliver software built for performance, scalability, and intuitive UX.

As a proactive and agile collaborator, I work closely with engineering teams, founders, and stakeholders to take ideas from initial architecture sketches to robust, production-ready deployments.

Explore Tech Stack View Career History Let's Connect

engineer.manifest.ts

NODE_ENV: production

const engineer = {

name: 'Sameer Bagwan',

role: 'Full-Stack & Mobile Engineer',

coreStrengths: [

'Next.js & React', 'React Native', 'Node.js', 'Redis', 'Three.js'

architecturePatterns: [

'Event-Driven Microservices', 'Distributed Redis Caching', 'Clean Architecture & RBAC'

status: 'Building High-Impact Systems'

};

System Status: Active

UTF-8 // TS 5

Industry Experience

3+ Years

Shipping Production Systems

Production User Reach

10k+ MAU

High-Concurrency Workloads

Backend Optimization

52% Faster

Redis & Connection Pooling

Platform Reliability

99.7% SLA

High-Availability Architecture

Core Engineering Disciplines

4 Specialized Focus Areas

// 01

Enterprise Web

Modern Web Engineering

Full Stack & Web Architect

Architecting responsive, SEO-ready Next.js & React web applications with clean component design, type safety, and robust state management.

Core Deliverables:

Next.js App Router & SSR Architecture
Optimized Core Web Vitals & LCP
Type-Safe Component Design Systems

Spec Ready

// 02

Cross-Platform Native

iOS & Android Systems

Mobile Application Engineer

Engineering production iOS & Android applications with native module bridges, real-time map geolocation, multimedia pipelines, and offline-first state synchronization.

Core Deliverables:

Native Module Bridges & Video SDK
Real-Time Geolocation & Map Overlays
Offline-First State Synchronization

Spec Ready

// 03

Distributed Systems

Microservices & Queues

Backend & Scalable APIs

Designing high-throughput RESTful Node.js/Express APIs, Redis caching layers, granular RBAC access controls, and MongoDB data pipelines.

Core Deliverables:

Redis In-Memory Caching (100ms response)
Granular 8-Tier RBAC Access Control
High-Throughput Microservice APIs

Spec Ready

// 04

Spatial Experiences

WebGL & Immersive UX

Interactive 3D & Creative Developer

Crafting engaging 3D web environments using Three.js and React Three Fiber with realistic lighting, procedural particles, and fluid canvas interactions.

Core Deliverables:

Three.js & React Three Fiber Scenes
Custom Shaders & Particle Systems
Dynamic WebGL Viewport Rendering

Spec Ready

// 02. CAREER_TRACK_RECORD

CURRENTLY ACTIVE:SDE @ Texto Digital Software Private Limited

Work & Professional Experience.

A chronological track record of shipping resilient, high-concurrency SaaS platforms, fluid 60fps mobile applications, and enterprise design systems across industry roles.

Engineering Journey

4 Milestones

3+ Years Production

HookFish → Catalyst Media → Texto Digital

Texto Digital (SDE): Scaled high-concurrency SaaS apps, optimized Core Web Vitals to 95+, and built modular component libraries.

Catalyst Media (App Dev): Engineered responsive client products with fluid animations & sub-second page transitions.

HookFish (MERN & Native): Built cross-platform mobile app from scratch, created REST APIs, and modernized admin architecture.

Full-Time Track RecordHigh-Concurrency SaaSMumbai & Hybrid

Core Specialization

Full-Stack & Mobile

React Native & MERN

Cross-Platform Mobile Apps & High-Performance Full-Stack Systems

Cross-Platform Mobile: React Native, 60fps gesture-driven interfaces, hardware acceleration, and seamless app store releases.

Modern Frontend: Next.js (App Router), React 19, TypeScript, Tailwind CSS, and Framer Motion interactive systems.

Backend & Data: Node.js, Express.js microservices, MongoDB schema design, Redis cache layers, and Cypress E2E.

React NativeNext.js / TypeScriptNode.js & RedisMongoDB

Texto Digital Software Private Limited

Full-time • Navi Mumbai, India

May 2026 – Present

SDE

Architecting high-performance web applications and internal tools using Next.js, React, TypeScript, and modern state architectures.
Spearheading performance optimization workflows reducing LCP by 40% and boosting overall Core Web Vitals to 95+.
Collaborating closely with cross-functional product designers and backend engineers to integrate scalable REST/GraphQL APIs and microservices.
Implementing robust component libraries with rigorous TypeScript typing, reusable design systems, and automated testing pipelines.

Stack:React NativeNext.jsReactTypeScriptNode.jsTailwind CSSWhatsApp APIRedis

Catalyst Media Integrated LLP

Full-time • Mumbai, India

Feb 2025 – May 2026

App Developer

Architected and shipped responsive, high-performance web applications and native mobile interfaces with React Native & React.
Developed modular UI components, integrated third-party APIs, and enhanced state management architectures for seamless user journeys.
Optimized rendering cycles, bundle size, and animations using Framer Motion and native hardware-accelerated drivers.
Collaborated closely with product stakeholders and design teams to deliver pixel-perfect client experiences.

Stack:React NativeReactTypeScriptNext.jsTailwind CSSFramer MotionREST APIsRedux

HookFish (hookfish.in)

Full-time • Hybrid

June 2023 – Feb 2025

MERN & React Native Developer

Engineered and scaled the HookFish cross-platform mobile app using React Native, delivering seamless buyer and seller transactions.
Architected scalable backend microservices, REST APIs, and database schemas with Node.js, Express.js, and MongoDB.
Integrated Redis caching mechanisms and optimized database indexes to reduce API latency across high-traffic endpoints.
Maintained 99.9% uptime and streamlined admin portal operations with real-time analytics and fast data querying.

Stack:React NativeMongoDBExpress.jsReact.jsNode.jsTypeScriptRedisTailwind CSS

HookFish (hookfish.in)

Internship • Hybrid

April 2023 – June 2023

MERN Stack Developer (Intern)

Modernized admin portal architecture by migrating legacy PHP workflows to React.js with responsive pagination and fast search.
Developed reusable UI components and integrated foundational REST APIs for user authentication and data management.
Conducted end-to-end automated testing using Cypress for web applications, guaranteeing reliable user transaction flows.

Stack:MongoDBExpress.jsReact.jsNode.jsJavaScriptCypress E2E

Technical Capabilities

Core Technologies & Tooling.

Production-grade technologies across frontend, backend microservices, real-time engines, cloud infrastructure, and automated testing.

Frontend & Mobile

JavaScript

ES6+, Async Logic & Web APIs

Frontend & Mobile

TypeScript

Type-Safe Architecture

Frontend & Mobile

React

Modern Component Systems

Frontend & Mobile

React Native

60fps Cross-Platform Apps

Frontend & Mobile

Next.js

App Router & SSR

Backend & APIs

Node.js

High-Concurrency Runtime

Backend & APIs

NestJS

Enterprise Microservices

Backend & APIs

Express.js

RESTful API Services

Backend & APIs

GraphQL

Declarative Schemas & APIs

Backend & APIs

WebSocket

Real-Time Bi-Directional

Databases & Queues

MongoDB

NoSQL & Aggregations

Databases & Queues

PostgreSQL

Relational & Indexing

Databases & Queues

Redis

In-Memory Caching & Queues

Databases & Queues

RabbitMQ

Message Broker & Workers

Cloud & DevOps

AWS Cloud

Cognito, Lambda, S3, CloudWatch

Cloud & DevOps

Firebase

Auth, Firestore, Cloud Messaging

Cloud & DevOps

Docker

Containerization & Builds

Cloud & DevOps

Kubernetes

Container Orchestration

Cloud & DevOps

Jenkins

Automated CI/CD Pipelines

Cloud & DevOps

Linux

UNIX Shell, System Admin & Kernels

Testing & QA

Jest

Unit & Snapshot Testing

Testing & QA

Cypress

End-to-End Test Automation

Testing & QA

Detox

Mobile Gray-Box Testing

AI & Dev Tools

Antigravity IDE

Agentic AI Pair-Programming & CLI

AI & Dev Tools

Claude Code

Anthropic AI Coding & Architecture

AI & Dev Tools

VS Code

Primary IDE & Extension Ecosystem

AI & Dev Tools

Cursor AI

AI-Native IDE & Code Generation

AI & Dev Tools

GitHub Copilot

AI Autocomplete & Chat

AI & Dev Tools

Postman

API Testing & Mocking

AI & Dev Tools

Figma

UI/UX Design Systems

AI & Dev Tools

Linear

Issue Tracking & Project Management

AI & Dev Tools

Notion

Technical Documentation & Notes

// 03. FEATURED SYSTEMS & APPS

Production Architectures

Featured Systems & Projects.

Production SaaS engines, fluid 60fps mobile applications, high-throughput microservices, and automated messaging infrastructure engineered for real-world reliability.

High-Concurrency SaaS60 FPS Native MobileRedis Caching & QueuesREST & Microservices

Broadcast Throughput: 10k+ msgs/min

WhatsApp Business API SaaS Platform & Chatbot Flow Builder

Texto Automation Engine

Engineered core communication modules for Texto, a high-concurrency SaaS platform tailored for Indian businesses. Automated WhatsApp customer engagement via drag-and-drop chatbot flow builders, live lead pipelines, and scheduled broadcast engines.

#react#nodejs#whatsapp-api

Read Case Study

Playback Frame Rate: 60 FPS

60fps AI Swing Analysis & Real-Time Video Annotations

Elevate Golf Mobile Platform

Built a React Native mobile coaching platform engineered for split-second 60fps video playback analysis, real-time drawing annotations, and AI performance metrics.

#react-native#firebase#aws-cloudfront

Read Case Study

API Response Speed: 2.1s → 1.0s

Real Estate Broker Mobile App & High-Throughput MERN Backend

HookFish Mobile & Cloud Suite

Full-stack real estate ecosystem featuring a React Native mobile broker application with geolocation map discovery, administrative management dashboard, and automated image pipelines.

#react-native#mongodb#redis

Read Case Study

// 04. GET IN TOUCH

AVAILABILITY:Open for new opportunities

Get in Touch & Contact.

Whether you are exploring high-impact full-stack development, distributed backend architecture, fluid mobile apps, or seeking an engineering partner—feel free to connect across any channel below.