Hassan M.

Freelance Full Stack Developer

Fiverr • Freelance

Jul 2022 - Present • 4 yrs 3 mos

1- Design and develop scalable SaaS platforms from concept through production. 2- Build full-stack applications using React, Next.js, TypeScript, Node.js, Express, and NestJS. 3- Design and optimize PostgreSQL, MongoDB, and Supabase databases. 4- Integrate AI models, AI agents, LLM workflows, chatbots, Stripe, and third-party services. 5- Implement authentication, role-based access control, and REST APIs. 6- Deploy and maintain production applications using Vercel, AWS, and DigitalOcean.

Senior Full Stack & AI Engineer

DeveloperTag • Tiempo completo

Jan 2025 - Aug 2026 • 1 yr 7 mos

1- Build core modules for a multi-entity e-commerce platform processing $3M+ in monthly transactions. 2- Led a road-safety reporting platform, reducing report-processing time by 60%. 3- Built a React Native app with a multi-tenant NestJS backend for a private-security SaaS platform. 4- Automated Microsoft 365 client onboarding workflows, reducing setup overhead by 85%. 5- Developed AI and LLM-powered features using Python, FastAPI, and RAG to automate workflows.

Software Engineer

Atini Studio Inc • Tiempo completo

Feb 2021 - Sep 2023 • 2 yrs 7 mos

1- Led backend development and system architecture for scalable web applications. 2- Built full-stack applications using Node.js, TypeScript, React, Next.js, PostgreSQL, and Supabase. 3- Developed REST APIs, authentication systems, and third-party integrations. 4- Optimized application performance, database queries, and backend processes. 5- Collaborated with clients and cross-functional teams to deliver reliable technical solutions. 6- Mentored junior developers and contributed to code reviews and development practices.