Available for opportunities

Hi, I'm Shubham Singh Chahar

Senior Software Engineer with 8+ years of experience building and scaling data-intensive, high-throughput distributed systems and multi-tenant SaaS platforms.

8+
Years Experience
4+
Major Projects
10L+
Users Impacted

Crafting Scalable Solutions

Passionate about building systems that handle millions of users with elegance and reliability

S

Building the Digital Future

I'm a Senior Software Engineer specializing in distributed systems, backend architecture, and fullstack development. With over 8 years of experience, I've architected and built platforms serving millions of users across gaming, education, finance, and enterprise sectors.

My expertise lies in designing high-throughput APIs, real-time systems using WebSockets, event-driven architectures, and optimizing frontend performance through SSR strategies and Web Vitals improvements. I believe in writing code that's not just functional, but scalable, maintainable, and built for the future.

High-Scale Systems
Real-Time Processing
Secure Architecture
Performance First

Technical Expertise

A comprehensive toolkit for building modern, scalable applications

Backend & Distributed Systems

Building robust, scalable backend systems with modern frameworks and patterns

Node.js / Bun TypeScript NestJS ElysiaJS Kafka WebSockets

Data & Performance

Optimizing data layer for high-throughput applications with smart caching strategies

MongoDB PostgreSQL Redis Query Optimization Caching

Frontend Engineering

Creating performant, responsive user interfaces with modern React ecosystem

React Next.js Vite Tailwind SSR Web Vitals

Infrastructure & DevOps

Deploying and managing applications across cloud platforms with modern tooling

AWS GCP Docker Nginx Linux

Security & Auth

Implementing robust authentication and authorization systems

JWT OTP OAuth Rate Limiting Access Control

Observability

Monitoring and debugging production systems with modern tooling

Prometheus Grafana Logging Profiling Incident Handling

Professional Journey

A track record of building and scaling production systems

Pensil Inc Nov 2025 - Feb 2026
Independent Consultant
Gurugram, India
  • Re-architected and optimized critical modules for production-scale systems
  • Improved performance, reliability, and deployment workflows
  • Led transition efforts and supported team scalability and system stability
Brandchamp May 2025 - Nov 2025
Senior Software Engineer
US Virgin Islands
  • Built backend systems for large-scale campaign and ambassador data processing
  • Designed async job pipelines and reporting systems handling high data volumes
  • Improved API performance via caching, optimized queries, and system tuning
Pensil Inc Jan 2021 - Apr 2025
Senior Software Engineer
Gurugram, India
  • Architected and built Pensil, a multi-tenant community platform from scratch
  • Designed distributed system with microservices, MongoDB, Redis, and async queues
  • Implemented real-time systems, authentication, rate limiting, and secure API layers
  • Set up observability stack using Prometheus & Grafana
  • Optimized frontend performance using SSR strategies and Web Vitals improvements
True Tech Professionals Jan 2020 - Jan 2021
Fullstack Developer
Panchkula, India
  • Built multiple production-grade platforms across domains
  • Developed fullstack systems with Laravel, Node.js, and modern frontend frameworks
  • Built strong foundation in system design and backend architecture
Kritivity Web Solutions Oct 2018 - Jan 2020
Fullstack Developer
Gurgaon, India
Mobiloitte Technologies Jan 2018 - Sep 2018
Junior Software Developer
New Delhi, India

Featured Work

Highlights of my key projects and contributions

Pensil Social

Flagship High-Scale SaaS Platform

A comprehensive real-time, multi-tenant community platform featuring live sessions, Q&A, gamification, events, and content feeds. Built from scratch with modern distributed architecture.

Multi-tenant architecture with strict data isolation
WebSocket-based real-time systems for live interactions
Event-driven backend workflows with async processing
Full observability with Prometheus & Grafana
Glance Gaming (6Lac users) Motilal Oswal Group (2.3 Lac users) Amity University (1.4Lac users) Minimeal Sun Community (10K users)

BetKing Virtuals

High-Traffic Gaming Platform

Worked on frontend performance optimization for one of the highest revenue platforms in Africa, handling massive concurrent traffic with seamless user experience.

Improved rendering efficiency under heavy traffic
Reduced load times significantly
Cross-functional collaboration with backend and product teams

Brandchamps Portal

Campaign Management System

Built comprehensive systems for large-scale campaign and ambassador management with robust backend jobs, reporting pipelines, and admin systems.

Backend jobs and async processing pipelines
Comprehensive reporting and analytics
Improved scalability of APIs and data processing

Taplingua

AI Language Learning App

Developed fullstack system including APIs, infrastructure, and deployment for an AI-based language learning application with cloud infrastructure management.

Fullstack development with APIs and WebApp
Cloud infrastructure management
Backend & WebApp performance optimization

Let's Work Together

Have a project in mind or want to discuss opportunities? I'd love to hear from you.

Get In Touch

I'm currently open to new opportunities and interesting projects. Whether you have a question or just want to say hi, I'll try my best to get back to you!