Hey, I'm Sagar!
Senior Full-Stack Engineer, System Architect, GenAI Builder.
Career timeline
- 2021–nowSenior Software Engineer at Bambinos Learning Solutions (Employee of the Year 2022): Scaled backend infrastructure for 60K+ monthly active users with 99.99% uptime. Optimized PostgreSQL indexing and query logic, cutting API latency from 800ms to 320ms (60% improvement). Led migration to high-availability GCP (Compute Engine & Cloud SQL), maintained >90% test coverage, and built real-time WebSocket analytics dashboards in React.
- 2019–2021Web Developer at Arobit Business Solutions: Engineered a multi-tenant SaaS backend supporting 300K+ users with multi-domain RESTful APIs. Scaled financial operations by integrating Stripe and Razorpay, processing 50L+ INR monthly with Dockerized environments and NGINX load balancing.
- 2018Web Developer at Wishnet Pvt Ltd: Developed the Wishtrip hospitality booking platform for 5+ nationwide properties. Reduced SLA breaches by 25% by building automated internal PHP/MySQL monitoring tools.
- 2018B.C.A. in Artificial Intelligence, Sainath University: Graduated as Best Performing Student (2018 Batch).
Projects & Research: Creator of SessionOrbit (AI Virtual Classroom) and Blogineers (AI Autoblogging SaaS with LangChain RAG & Supabase).
Latest
All PostsShelves
All ShelvesGuides and architectural patterns for designing resilient, high-throughput web applications, microservices, and multi-tenant platforms.
Deep dives into database indexing, transaction isolation, connection pooling, and optimizing PostgreSQL queries under heavy load.
Practical guides for implementing GenAI workflows, prompt orchestration, retrieval-augmented generation (RAG), and vector embeddings.
Strategies for container orchestration, zero-downtime NGINX load balancing, CI/CD automation, and GCP infrastructure.
Series
Lessons learned architecting and scaling platforms to 60K+ monthly active users and 99.99% uptime on GCP.
Techniques for deep query optimization, explain analyze breakdown, index tuning, and dropping latency from 800ms to 320ms.
Building robust retrieval-augmented generation pipelines using LangChain, OpenAI, vector databases, and Node.js.
Zero-downtime deployments, Kubernetes orchestration, Dockerization, and GCP Compute Engine / Cloud SQL architecture.
Projects
All ProjectsAI virtual classroom and tutor-student operations platform with real-time sync
Live faculty & student analytics dashboard serving 60K+ MAU with 99.99% uptime
Multi-tenant SaaS backend supporting 300K+ users with Stripe & Razorpay billing
Hospitality booking platform for 5+ nationwide properties with automated SLA monitoring