Alexandru Marin

Worked as a freelancer for several projects as a Full Stack Developer

* Built distributed ETL pipelines with NestJS, AWS & Airflow, improving efficiency by 30%. * Developed secure RESTful APIs with MySQL, reducing latency by 25%. * Engineered HIPAA-compliant backend for OCR-based health data, boosting speed by 40%. * Integrated GPT-4o for medical report analysis, improving accuracy by 20%. * Built Nuxt.js web app, cutting defects by 40%. * Enhanced QA with Playwright & Jest, raising coverage to 60% and reducing bugs by 45%.

*Optimized high-traffic app by improving UI, refactoring APIs & SQL, boosting response time by 40% and backend by 30%. *Co-developed scalable NestJS microservices with MySQL, achieving 35% faster responses. *Implemented automated testing with Cypress, Jest & Mocha, increasing reliability and reducing production incidents by 40%.

*Built scalable RESTful & gRPC APIs with NestJS, PostgreSQL & Redis, improving caching & performance. *Designed modular microservices with AWS SQS, boosting scalability by 40%. *Developed performant Vue.js frontends with Tailwind & Redux using Atomic Design. *Led Vue 3 migration with Pinia, improving state management. *Added real-time chat via WebSockets. *Implemented full-stack testing with Cypress & Jest (85% coverage). *Automated deployment with Docker, GitLab CI/CD & AWS ECS.

Collaborated in agile teams (Scrum/Kanban) to deliver high-quality software through rapid iteration. Built responsive UIs with React, Next.js, and Material UI using Atomic Design. Developed scalable APIs with NestJS, Django, and FastAPI, integrating Celery and Channels for async tasks. Delivered secure payment systems with Stripe and GraphQL, and real-time features with Vue 3 and Flask. Implemented CI/CD with Docker and GitLab, automated testing with Cypress/Jest, and boosted deployment efficiency.