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saurabh dhabu

@saurabhdhabu

Full Stack Engineer at o9 Solutions and founder of TestPlatform.in, where I built a multi-tenant SaaS serving 9 institutes.

India

Message

At o9 Solutions, I designed and shipped C# / ASP.NET Core microservices and REST APIs, alongside React 18 and TypeScript features for an enterprise supply-chain SaaS. SQL Server index and query tuning with Redis caching cut production API latency by 40%.

Since March 2025, I’ve built and run TestPlatform.in, a multi-tenant B2B SaaS for coaching institutes, as its sole engineer. It serves 9 paying institutes and 2,278 students; its test-generation flow turns a 1.89 lakh-question bank into a paper in about 20 seconds. I own its architecture, security, releases, and production support.

Experience

Work history, roles, and key accomplishments

Current

Founder & Lead Engineer

Current

AiCharya - TestPlatform.in

Mar 2025 - Present (1 year 7 months)

Built and run a multi-tenant B2B SaaS for coaching institutes, from empty repository to 9 paying tenants and 2,278 students. Owned the full stack: React 18 frontend, Node/Express + MongoDB API, security, and CI/CD.

React 18+Redux TypeScript NodeJS Express MongoDB Mongoose JWT OAuth RBAC Docker CI CD Jest Playwright

Software Engineer II - R&D / Core Software Development

o9 Solutions Pvt Ltd

Aug 2020 - Mar 2026 (5 years 7 months)

Designed and shipped C# / ASP.NET Core microservices and RESTful Web APIs, and built React 18 SPA features. Optimized SQL Server queries and indexes with Redis caching to cut production API latency by 40%, and implemented multi-tenant OAuth 2.0, JWT, and Azure AD SSO.