Rajeshwar Singh

Software
Developer

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Work Experience

My work experiences across different companies and roles.

MediSetuWorking

Software Engineer

May 2026 - Present

Technologies & Tools

What I've done

  • Core engineer on a healthcare SaaS for appointment booking, patient management and lab operations (AppointMyDoctor for patients, MediSetu for clinics).
  • Cut API response latency from 100–200 ms to 3–5 ms by optimizing backend APIs and database queries.
  • Deployed and maintain the backend end-to-end with Docker, AWS CloudWatch and Utho, with Nginx as a reverse proxy that blocks unauthorized API endpoints.
  • Integrated Zoho payments, Meta WhatsApp API, ABHA health-ID linking and Server-Sent Events for real-time notifications.

Kuchoriya TechSoft

Full Stack Developer

Feb 2026 - May 2026

Technologies & Tools

What I've done

  • Designed a multi-tenant architecture with isolated per-company databases for a SaaS platform.
  • Built and maintained 30+ REST APIs with JWT authentication and RBAC across 5+ user roles.
  • Integrated HLS (m3u8) adaptive streaming with AWS S3, supporting 5GB+ media files across devices.

Bharg IT Solutions

MERN Developer

Feb 2024 - Jun 2024

Technologies & Tools

What I've done

  • Migrated a Hospital ERP backend from .NET to Node.js and Express while preserving core functionality.
  • Added React Query for server-state management, caching and background sync.
  • Reduced cumulative layout shift and improved load performance with prefetching and efficient API usage.

FreelanceWorking

Full-Stack Developer

Aug 2024 - Present

Technologies & Tools

What I've done

  • Design, build and deploy end-to-end websites for independent clients, including legacy-marble.com and skilltyro.com.
  • Animated front-ends with GSAP, Framer Motion and Three.js.
  • Picked the stack per client's needs and budget: Django, Flask, PHP or Shopify.