Sohaib Ahmad

Sr Software Engineer

Crymzee Networks • Full time

Jun 2024 - Present • 2 yrs 3 mos

• Developed and maintained RESTful APIs using Python, Django, and Django REST Framework (DRF) to support scalable front-end applications built with Next.js and React. • Implemented server-side rendering (SSR), client-side rendering (CSR), and API integrations in Next.js, improving performance, SEO, and user experience. • Integrated payment gateways (Stripe, PayPal) with secure backend processing, webhook handling, and front-end checkout flows. • Built authentication and authorization systems using OAuth 2.0, JWT, and social logins (Google, Facebook, GitHub) with secure token management. • Designed and optimized PostgreSQL databases, implementing indexing, query optimization, and data integrity best practices. • Developed real-time features using WebSockets (Django Channels) with live updates and notifications in Next.js applications. • Implemented asynchronous task processing using Celery and Redis, improving background job execution and system performance. • Containerized applications using Docker, enabling consistent development, testing, and deployment environments. • Collaborated across backend and frontend layers to deliver end-to-end full-stack solutions with clean APIs and scalable architecture