About Me

Hey, I'm Sagar Dolui 👋

I am a Senior Full-Stack Engineer with over 8+ years of experience architecting high-performance web platforms, SaaS ecosystems, and scalable cloud backends. My career has focused on creating reliable, high-uptime systems in EdTech and SaaS domains, handling workloads for hundreds of thousands of users.

🚀 What I Do

  • Full-Stack Engineering: Building production-grade applications using Node.js, TypeScript, React, PostgreSQL, and Laravel.
  • Cloud Architecture & DevOps: Designing resilient, high-availability deployments on GCP (Compute Engine, Cloud SQL, GKE) with Docker, Kubernetes, and NGINX.
  • Database Optimization: Deep PostgreSQL query optimization, indexing strategies, connection pool management, and latency reduction under heavy concurrent load.
  • GenAI & RAG Pipelines: Implementing production AI features using LangChain, OpenAI API, Claude API, and vector retrieval.
  • Real-Time Systems: Developing low-latency dashboards and collaborative tools using WebSockets and WebRTC.

💼 Career Highlights

  • Bambinos Learning Solutions (2021 – Present):

    • Scaled backend infrastructure to serve 60K+ monthly active users with 99.99% uptime.
    • Optimized database query patterns and indexes, slashing API latency from 800ms to 320ms (60% boost).
    • Led migration to a high-availability Google Cloud Platform environment.
    • Maintained >90% unit and integration test coverage across all core services.

  • Arobit Business Solutions (2019 – 2021):

    • Engineered a robust multi-tenant SaaS backend powering 300K+ users.
    • Handled financial integrations with Stripe and Razorpay, processing 50L+ INR monthly.
    • Established Dockerized workflows and NGINX load balancing for zero-downtime releases.

  • Wishnet Pvt Ltd (2018):

    • Built the Wishtrip hospitality booking platform across 5+ properties nationwide.
    • Created automated monitoring tools that decreased SLA breaches by 25%.

🛠️ Personal Projects

  • SessionOrbit: An AI-powered virtual classroom and tutor-student operational platform featuring real-time state synchronization, automated session tracking, and a 40% reduction in administrative overhead.
  • Blogineers: An automated AI blogging SaaS leveraging LangChain RAG pipelines, Supabase, OpenAI, and PayPal billing.

🎓 Education & Honors

  • Bachelor of Computer Applications (B.C.A.) in Artificial Intelligence
    Sainath University (2018) — Best Performing Student (2018 Batch)
  • Employee of the Year (2022) — Bambinos Learning Solutions

📬 Get in Touch

I'm always excited to discuss scalable systems, GenAI architectures, and high-impact engineering challenges.