- Dhaka, Bangladesh
- GMT+6
- Open to remote work
Saifur Rahman Tamim
Software Engineer · 4+ years
.NET · TypeScript · PostgreSQL
I build and run production SaaS, and I keep getting pulled back to security. At Nexzen Solution I own SaleBee, a live multi-tenant CRM, end to end: frontend, backend, database and servers.
- 5 s → 500 ms
- critical CRM page loads after moving filtering into PostgreSQL
- Zero downtime
- SQL Server → PostgreSQL migration of a live multi-tenant CRM
- 5,000+ users
- registered on an e-learning platform streaming about 7 TB of video a month
- 2 arXiv preprints →
- first-author research on AI watermark security
Selected work
Employer · Nexzen Solution
SaleBee CRM
Zero-downtime move to .NET 10 and PostgreSQL, with critical pages 10× faster, on a live CRM I own end to end.
- Full-Stack
- Backend
- Database
Client project
MediVerse
One NestJS backend for web, Android and iOS: 5,000+ users, about 7 TB of video streamed a month.
- Backend
- Database Migration
- DevOps
Client project
Multi-Tenant Inventory SaaS
Live for multiple client businesses, each with its own isolated PostgreSQL database.
- Backend
- Multi-Tenant
- Database Design
Experience
Research
Two first-author arXiv preprints on AI watermark security:
Let's work together
Hiring, or building something that needs an engineer who owns it end to end?
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