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Thohanur Rahman

@thohanurrahman

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Full Stack Developer at Mastery Corporation building multi-tenant SaaS handling 30M+ customer records.

Bangladesh

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At Mastery Corporation, I lead the design and development of multi-tenant SaaS features, including backend architecture and secure tenant isolation. I resolved production performance bottlenecks, reducing average request latency by approximately 120–250ms.

I also developed production-grade full-stack services at Code Prophet and built reusable React.js and Next.js components at AhamedAiT. On Mastery CDM, I led system design and backend development for a platform handling 200K+ daily requests and 30M+ customer records.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Developer – Team Lead (Backend Focused)

Current

Mastery Corporation

Jun 2025 - Present (1 year 4 months)

Led the design and development of multi-tenant SaaS features, owning backend architecture, secure tenant isolation, authentication, and authorization from technical design through production. Investigated and resolved production performance bottlenecks, reducing average request latency by approximately 120-250ms through database optimization, API tuning, and service-level improvements.

NodeJS ExpressJS TypeScript Prisma Redis BullMQ Multi tenant architecture Authentication Authorization Database Optimization API Optimization Performance Optimization

Full-Stack Developer

Code Prophet

Aug 2024 - Jun 2025 (10 months)

Developed and maintained production-grade full-stack services using React.js, Node.js, and TypeScript, owning features from implementation through deployment. Improved backend efficiency by approximately 20-35% through query optimization, API redesign, performance profiling, and reliability improvements across REST services handling 10K-50K+ daily requests.

React NodeJS TypeScript REST APIs Query Optimization API Redesign Performance Profiling Reliability

Full-Stack Developer (Frontend-Focused)

AhamedAiT

Feb 2023 - Jul 2024 (1 year 5 months)

Built reusable React.js and Next.js components with improved responsiveness and maintainable frontend architecture. Achieved FCP of approximately 0.2s and LCP of approximately 0.39s through rendering optimization, code splitting, and lazy loading.

React Next.js Frontend Architecture Responsive Design Rendering Optimization Code Splitting Lazy Loading