Sifat Rabbi

Email showmic96@gmail.com for a remote Staff or Principal engineering role - that is the fastest path. Open to full-time and part-time remote roles. You can also review his Toptal profile at https://www.toptal.com/resume/sifat-rabbi to open a formal engagement. If you're hiring for a remote Staff or Principal role, or building something in healthcare, fintech, or AI, email me and we can talk it through.

He takes full technical ownership of production platforms across healthcare and fintech: architecture decisions, system migrations, Next.js and NestJS applications, PostgreSQL data models, and FastAPI services for LLM-powered and retrieval-augmented generation features. He works end to end with US-based teams, from early design through deployment and ongoing operations.

Open to full-time and part-time remote roles. Priority order: Full-time remote roles, then Part-time remote roles, then Select freelance and contract projects. Staff and Principal-level full-time remote roles come first. If you're hiring for a remote Staff or Principal role, or building something in healthcare, fintech, or AI, email me and we can talk it through.

Staff Software Engineer · Remote, Full-Time. Staff Software Engineer at Toptal (remote). Toptal is a vetted talent network (Toptal-vetted, top 3% of engineering talent) where Sifat holds a real full-time remote role owning architecture, development, and deployment for US-based clients. This is not short-term freelance work.

Core production stack: Next.js, NestJS, TypeScript, PostgreSQL, AWS, and Prisma for full-stack product work. FastAPI when the problem calls for LLM-powered or retrieval-augmented generation (RAG) features. React for UI, pgvector for semantic search, and Tailwind CSS for design systems.

Yes. He holds a full-time remote role working directly with US-based client teams and is available during US Eastern and Pacific business-hours overlap. Real-time collaboration, code reviews, and architecture calls all happen in that window.

Healthcare, Fintech, AI-driven products. He has shipped HIPAA/SOC2-compliant healthcare platforms, fintech billing and payments infrastructure, and AI-driven product features including RAG assistants and LLM integrations. Domain depth in both healthcare and fintech means he can own requirements, not just code.

He led a full migration of a legacy ASP.NET/MSSQL system with 50M+ records to NestJS, PostgreSQL, and AWS, including a core query that went from 60 seconds to 500ms after indexing and schema work. That end-to-end ownership, from planning through production cutover, is the kind of engagement he takes on.

BSc in Computer Engineering from Ahsanullah University of Science and Technology (AUST). He has published research in a Japanese academic journal and currently serves as an adjunct lecturer at AUST, teaching software engineering alongside his industry work. He reached Codeforces Expert (blue), peak rating 1866, and solved 1,000+ UVa problems. The full record is at https://showmic96.dev/competitive-programming.

He reached Codeforces Expert (blue), peak rating 1866, within eight months of starting contests, and solved 1,000+ problems on UVa Online Judge. He also won Intra AUST programming contests and placed 11th at an IUPC at BUP. The record, with profile links, is at https://showmic96.dev/competitive-programming.

Selected production projects and case studies are on the Projects page. Engineering notes, interview write-ups, and practical development posts live on the Writing page. Both are accessible from the navigation and linked throughout this site.