About

Senior full-stack developer building scalable systems, integrations, automation, and business platforms.

My work focuses on solving complex business problems through clean architecture, reliable backend systems, maintainable frontend applications, database-driven workflows, and practical automation.

Professional summary

I'm Hamid Safiullah, a senior full-stack developer and founder of Calliv. I design and build scalable web applications, business platforms, admin systems, automation tools, API integrations, and real-time communication solutions.

I have experience building and maintaining production-level systems using C#, .NET Core, Angular, JavaScript frameworks, SQL Server, PostgreSQL, REST APIs, LINQ, background jobs, third-party integrations, and real-time communication technologies.

Over the years, I have worked on large-scale systems including the GetMovd logistics ERP, TechFlo CRM, and CareCloud's global employee portal serving 4,200+ staff — as well as RemotifyOffice.com, Alto-Medical.com product automation, admin dashboards, VoIP features, scraper-based workflows, and custom client solutions.

I enjoy systems where backend logic, frontend usability, database design, integrations, and business workflows all need to work together smoothly.

Quick facts

  • Core stack:
    C#, .NET Core, ASP.NET Core, Angular, TypeScript, SQL
  • Strengths:
    Architecture, APIs, integrations, automation, data workflows
  • Company:
    Founder of Calliv
  • Contact:
    hello@hamidsafiullah.com
Why work with me

More than coding: planning, architecture, integrations, debugging, and business-focused delivery.

I understand how to structure systems, work with databases, integrate third-party services, debug production issues, and build tools that solve real operational problems.

Architecture First

Experienced in designing scalable, maintainable, database-driven web applications with clean backend architecture, API-first workflows, and modular frontend systems.

Business Workflows

I build around real operations: admin panels, tracking tools, reporting screens, inventory workflows, product queues, and automation processes.

Long-Term Support

My focus is clean, scalable, maintainable software that remains useful for the business after the first release.