Hello! 👋
I'm Shubham Kumar Rohit
Software Engineering Head @ Statiq · Ex-Doubtnut (50M+ users)
I architect distributed systems that serve millions — and lead the teams that ship them.
- Years Experience
- 8+
- Years Experience
- Users Served
- 50M+
- Users Served
- Daily Messages Handled
- 10M+
- Daily Messages Handled
- Uptime Delivered
- 99.9%
- Uptime Delivered
// about
About Me
I'm a system architect and engineering leader with 8+ years of experience designing platforms that scale to millions of users. Today I head engineering at Statiq, where I own the end-to-end architecture behind India's largest EV-charging network.
My career is defined by shipped products at scale: payment orchestration platforms, real-time communication systems handling 10M+ daily messages, and high-concurrency WebSocket infrastructure sustaining hundreds of thousands of live connections at sub-200ms latency — delivered across Statiq, Doubtnut (50M+ users), and Coolwinks.
As a leader, I build and mentor engineering teams, set architecture and code-quality standards, and drive decisions from system design to production rollout — because great products come from robust systems and empowered engineers.
// experience
Experience
Software Engineering Head
- Leading the backend and system architecture for India’s largest EV charging ecosystem, enabling seamless operations across 48K+ chargers and 3.8L+ concurrent user sockets with high scalability and reliability.
- Led backend migration of the MobileApp from a monolithic to microservices architecture using API Gateway, Traefik, and AWS Route53, resulting in 3x faster deployments and global traffic routing support.
- End-to-end designed and migrated Shell Single-Tenant system to Statiq Multi-Tenant architecture with zero downtime and full data integrity.
- Developed the PayFlow payment microservice with smart payment routing, integrating Razorpay, Juspay, Amazon Pay, PayU and TataEV Wallet, reducing transaction processing time by 35% and increasing reliability by 20%.
+ 5 more highlights − Show less
- Implemented ElasticSearch Hot-Warm Tiering to separate frequently accessed logs from archival data, reducing log storage costs by 80%.
- Optimized RDS by tuning queries, indexing, and pooling; reduced CPU usage by 85% and improved query speed by 60%.
- Designed high-concurrency WebSocket systems for OCPP 1.6 and real-time user communication achieving sub-200ms latency.
- Engineered Pigeon, a centralized communication microservice in Go, integrating FCM, Gupshup, Mailjet, and Exotel IVR to unify messaging workflows, increase delivery efficiency by 40%.
- Applied Redis key compression using prefix-based encoding across high-throughput services, achieving 80% reduction in memory usage.
Software Development Engineer II
- Built the DN-Shorts (Video Reels) feature with a real-time, session-aware recommendation algorithm, increasing in-app engagement time by 13%; feature scaled to support 2.5–3 million DAUs.
- Designed and implemented a wallet system from scratch, integrating 3rd-party reward providers (Paytm, Myntra, Amazon, Zomato, etc.) for seamless voucher redemption and user incentives.
- Developed the Study Group feature enabling real-time peer-to-peer doubt resolution with group creation, admin privileges, and moderation tools; system handled 8–10 million daily messages with high reliability.
- Optimized API performance and database queries across multiple services, resulting in 35% reduction in response time and improved overall system throughput under high load.
Senior Software Developer
Coolwinks
- Developed scalable backend systems from scratch for Coolwinks Android & iOS apps, supporting over 1 million+ users with an uptime of 99.9%.
- Integrated 4 payment gateways and digital wallets, enabling 100K+ monthly transactions with an auto-refund feature that reduced refund TAT by 70%.
- Designed an AI-powered “Cool Lenses” recommendation engine that increased lens conversion rate by 15% through personalized suggestions.
- Built and maintained a custom CRM dashboard used by 50+ support agents, integrating IVR and AI chatbot support to handle 20K+ monthly queries.
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- Implemented a high-performance PWA for Coolwinks.com, improving load times by 40% and enabling seamless in-app shopping via PhonePe.
Software Engineer
KineticX Tech Solutions Pvt. Ltd.
- Developed Kx-CRM v2.0 from scratch using Flask and Angular, streamlining sales and marketing workflows.
- Built Docker-based deployment automation tool for CRM/ERP trials.
- Enhanced Kx-ERP modules and optimized core backend performance.
Backend Developer Intern
Sportido
- Developed and optimized REST APIs using Flask and MySQL for the sports discovery platform.
- Contributed to backend architecture, schema design, and performance optimization.
// projects
Projects
Payflow
Centralized payment service supporting multiple payment methods, smart routing, refunds, and dynamic payment link generation. Enables seamless payment orchestration across platforms with Juspay, RazorPay, SBI ePay, PayU, Tata Wallet etc integrations and robust API architecture.
Pigeon
Centralized notification service for managing multi-channel alerts across email, SMS, WhatsApp, and push notifications. Built for scale and reliability with real-time delivery tracking and analytics.
OCPP 1.6 EV Charging
High-concurrency WebSocket-based system supporting over 48,000 concurrent EV chargers. Designed for low-latency, real-time communication between chargers and backend, ensuring transaction reliability and uptime.
StudyGroup
Scalable backend for real-time group learning and doubt-solving sessions with chat, media sharing, and live notifications, used by millions of students across India.
// education
Education
Bachelor of Technology (B.Tech.) in Computer Science Engineering
- Served as President of the Computer Society of India (CSI) at Beant College of Engineering & Technology, Gurdaspur.
- Led multiple technical workshops and coding events on Java, C++, and emerging web technologies.
Senior Secondary (10+2), Science
// github
GitHub Contributions
Year-by-year view of my open-source and private code activity on GitHub — commits, pull requests, reviews, and issue contributions.
// contact
Contact Me
Have a project in mind, a role to discuss, or just want to talk systems at scale? Drop a message or reach out directly.