YouTube

Who I Am

Full-stack developer with over 3 years of experience building solutions for startups and companies. Based in Amsterdam, I work with modern technologies to create products that generate real impact.

Specialized in scalable architectures and quality code. I develop web applications that grow with the business, prioritizing maintainability and performance.

Engineering principles

Ship small, measure, iterate.

What I care about

Building things people actually use.

Franco Seiler

Experience

Corporate-grade experience, now at the service of your projects.

Full Stack Developer

Freelance
March 2024 - Present
  • Design, build and ship end-to-end web platforms for startups and businesses, owning each project from first call to production.
  • Work across the full stack with React, Next.js, Node.js, Python and TypeScript, building everything from custom e-commerce and SaaS products to corporate sites.
  • Develop backends with Node.js/Express, NestJS and Python (Django, Django REST), modeling data in PostgreSQL and MySQL with Prisma, TypeORM and Sequelize.
  • Design and document REST APIs, reusable component libraries and design systems with SCSS and Tailwind CSS to keep delivery fast and consistent.
  • Integrate payments and third-party services: Mercado Pago and Stripe (subscriptions, webhooks), Google OAuth, cloud storage (AWS S3 / GCS) and transactional email.
  • Build AI-powered features with the OpenAI API (assistants, generative content, smart automation) and architect multi-tenant, role-based platforms with secure auth (JWT, OAuth, Keycloak).
  • Provision and administer Linux (Ubuntu/Debian) VPS servers: Nginx reverse proxy, SSL with Let's Encrypt, PM2/Gunicorn, firewall (UFW) and SSH hardening.
  • Set up Docker deployments and CI/CD pipelines (GitHub Actions) with automated tests, zero-downtime releases, and ongoing maintenance, performance tuning and SEO.
  • Lead technical planning, database modeling and architecture decisions directly with clients, translating business goals into scalable systems.
  • React
  • Next.js
  • Node.js
  • Python
  • Django
  • NestJS
  • TypeScript
  • PostgreSQL
  • MySQL
  • Prisma
  • Docker
  • Linux
  • Nginx
  • VPS
  • Stripe
  • OpenAI API

Tools

Frontend

JavaScript
TypeScript
React
Next.js
Redux
Sass
Tailwind
React Query
Brand Framer Motion Streamline Icon: https://streamlinehq.comFramer M
HTML5
CSS3
Bootstrap

Backend

Python
Node.js
Express
Nest.js
FastAPI
GraphQL
Sequelize
MongoDB
PostgreSQL
MySQL
Redis
Airtable

Tools

Git
Docker
Wordpress
Figma
Jest
N8N
Cypress Icon Streamline Icon: https://streamlinehq.comCypress
AWS