Ubaid

Backend-focused Full-Stack Engineer with 3+ years shipping scalable SaaS, fintech, and AI-integrated products in Python (Django, FastAPI, Flask), Ruby on Rails, and NestJS. Specializes in multi-tenant API architecture, secure authentication (JWT/OAuth 2.0/RBAC), payment infrastructure (Stripe, PayPal), asynchronous workflow automation, and production LLM integrations. Delivered automation improvements that cut manual operational effort by 60%.

Software Engineer at Flicken (2023-09 – Present)

• Architected and maintained backend systems for multi-tenant SaaS and automation platforms using Django, FastAPI, Flask, and Ruby on Rails, powering authentication, billing, and third-party integrations in production.
• Designed and shipped high-performance REST APIs for workflow automation and data-driven platforms serving multiple client organizations.
• Implemented JWT/OAuth 2.0 authentication with role-based access control (RBAC) for secure multi-tenant access; integrated Stripe and PayPal for subscription billing and webhook-driven synchronization with external services.
• Built asynchronous task-processing pipelines with Celery and Redis, automating background workflows and reducing manual operational effort by approximately 60%.

Software Engineer, Freelance at Aglivo (2024-04 – 2024-09)

• Led backend development of a NestJS-based workflow automation and operations-management system, designing REST APIs for order management, payments, and internal reporting.
• Developed a reusable service-layer architecture that improved maintainability and accelerated feature delivery across releases.
• Integrated authentication, authorization, and third-party services, ensuring secure and reliable API communication.
• Collaborated with distributed, cross-timezone teams through full planning-to-deployment cycles using Git-based workflows.

Bachelor of Science in Computer Science – Lahore Garrison University (2019-09 – 2023-09)