Mats Gustafsson

Designed and built a production SaaS platform for vehicle ownership, maintenance history and verified resale documentation. Built backend architecture with Django and FastAPI, implemented secure REST APIs and authentication, and created an AI-assisted OCR pipeline. Developed an Expo mobile application with secure authentication, modelled data in PostgreSQL, and set up GitHub Actions CI/CD. Focused on security-first workflows including signed uploads, ownership validation and GDPR-aligned processes, along with performance optimization and accessibility improvements.

Designing, building, and operating production software with a backend-first engineering standard: explicit domain boundaries, reliable data models, testable services, documented decisions, and repeatable delivery. Build and maintain Django applications with PostgreSQL-backed domain models, REST API foundations, and shared backend rules supporting web and mobile clients. Design authentication, authorization, ownership boundaries, billing state, signed uploads, media lifecycle, and privacy-aware deletion flows. Use Celery and Redis for background processing and asynchronous product workflows with validation, retries, and failure handling where appropriate. Collaborate across React/TypeScript and HTMX frontends while keeping business rules, permissions, and data integrity anchored in the backend. Maintain Docker-based environments and GitHub Actions quality gates for tests, security checks, and repeatable deployment.

Designed and delivered production-grade full-stack applications for real clients. Built Django + Wagtail backends with REST APIs, containerized using Docker. Implemented modern React + TypeScript frontends with Vite. Deployed backends to Fly.io and frontends to Cloudflare Pages.