Faizan Ali

Full Stack Developer

Fiverr • Freiberufler

Oct 2019 - Present • 6 yrs 11 mos

- Built a multi-tenant Django REST API for a Calendly-style booking platform, featuring a two-way Google Calendar integration. OAuth with token refresh, event and Meet-link management, and real-time sync via Google push-notification channels. - Developed the availability engine and public booking API: slot generation from weekly and date-based rules with buffers, notice windows, and Colombian holiday exclusions, validated against live calendar data to prevent double-bookings. - Built TripXcite end-to-end, an AI-powered travel planning platform integrating OpenAI and Google Places API to discover places and generate personalized itineraries. - Developed interactive itinerary management features allowing users to reorder, customize, and finalize their travel plans. - Developed a Patient Document Management System and created RESTful APIs for seamless and secure document uploads, utilizing base64-encoded strings converted to files stored in an AWS S3 bucket (Django). - Implemented secure document downloads through the doctor and patient portal, with time-limited download links. - Utilized JWT for API authentication, ensuring secure access to the Patient Document Management System and maintaining data integrity (DRF). - Designed and developed AI tools and a news listing website, leveraging Ajax and Django, to enhance worldwide exposure. Achieved excellent performance and optimization. - Developed a web application for WhatsApp campaigns, utilizing user wallet credits. Integrated Stripe for seamless payment processing and convenient credit top-up functionality (Django).

Full Stack Developer

CoLivingPro • Freiberufler

May 2025 - Jul 2026 • 1 yr 2 mos

- Built a full stack property management SaaS for coliving operators as sole developer, using Django, Python, React, PostgreSQL, Celery and Redis - Developed a dynamic pricing algorithm and automated listing pipeline, where a scheduled Celery job reprices vacant rooms and updates their listings daily - Integrated Zillow and Zumper feed syndication so listings publish and stay price-synced automatically, with alerts for manual platforms like Facebook Marketplace - Implemented Stripe subscription billing, lead management, a data-backed rent estimator and an ROI calculator - Set up CI/CD pipelines with staging and production environments on cloud infrastructure with AWS S3 - Live with paying operators: 145 users, 47 properties, 300+ rooms and 400+ leads generated so far

Full Stack Developer

REQBEE • Freiberufler

Mar 2025 - Jul 2026 • 1 yr 4 mos

- Built an AI-powered SaaS platform for a German SAP consultancy as sole developer, using Django, Python, PostgreSQL, Celery and Redis - Integrated Dialogflow CX to return structured responses. - Implemented Stripe subscriptions and a credit based pay-per-use system side by side through a single access layer, with webhooks for renewals, failed payments and cancellations - Designed credit handling to reserve on request and refund on failure, preventing double charges and stranded credits - Delivered auth, role and plan-based access control, billing history, invoices, admin panel and a GDPR-compliant SEO optimized site