Mudassir R

Senior Full-Stack Engineer

Web Factory • Freelance

Dec 2022 - Present • 3 yrs 10 mos

Lead engineer across 3 concurrent client products owning React frontends, Python/Django APIs, and PostgreSQL on GCP and AWS. - Improved API performance by ~45% on a fintech product through Redis caching, N+1 query elimination, and PostgreSQL index tuning, directly reducing server costs. - Architected a multi-tenant SaaS platform from scratch including schema, REST API, RBAC, and React dashboard adopted by 500+ business users at launch. - Built CI/CD pipelines via GitHub Actions on GCP Cloud Run, cutting manual deployment effort by ~60% and enabling consistent weekly releases. - Dockerised 4 Django services for consistent local and production environments, eliminating recurring environment mismatch production incidents. - Managed US and UK client relationships directly through weekly demos, async updates, and technical discovery calls across a 5 to 8 hour time zone difference.

Full-Stack Developer

Tech Hub • Período integral

Aug 2020 - Nov 2022 • 2 yrs 3 mos

Delivered 6+ production web applications across fintech, retail, and healthcare end-to-end covering React UI, Django API, database architecture, and cloud deployment. - Rebuilt a flagship retail frontend in React, cutting page load time by ~35% and reducing bounce rate, an outcome the client directly attributed to improved conversion. - Built a product search layer using Elasticsearch, cutting average search response time from ~800ms to under 120ms. - Deployed and maintained applications on AWS Lambda, API Gateway, S3, and EC2 with CloudWatch alerting and structured logging for production observability. - Implemented real-time features using Django Channels and Firebase across 3 products covering live notifications, in-app messaging, and order tracking. - Achieved over 80% test coverage on core services using Pytest and Jest, the highest ratio on the team, and introduced documentation practices that reduced onboarding time.

Junior Full-Stack Developer

CureMD • Período integral

Jun 2018 - Aug 2020 • 2 yrs 2 mos

Contributed to a US-facing patient portal and internal admin tooling at a healthcare SaaS company serving clinics and hospitals across North America. - Built 20+ reusable React components including form controls, scheduling UIs, data tables, and notification flows, adopted into the shared component library used across multiple products. - Developed backend features in Python/Django covering appointment scheduling logic, report generation pipelines, and notification dispatch services integrated with external APIs. - Resolved 60+ production tickets in the first year using Django debug tools, SQL query analysis, and server logs, establishing a reputation for thorough and fast turnaround. - Progressed from supervised feature work to independent ownership within 8 months and authored technical documentation for 4 internal APIs used to onboard new engineers.