Full Stack Product Engineer building digital products end-to-end: chatbots, web platforms, mobile apps, backends and integrations. Currently based in Barcelona, Spain.
I work from problem definition and user flows to architecture, development, deployment and production operation. My strongest work sits at the intersection of product thinking, full stack execution and real users.
- Public-sector digital products with real users and operational constraints.
- WhatsApp chatbots, citizen-service flows and internal dashboards.
- Web platforms, mobile apps, SaaS products, backends and third-party integrations.
- Product discovery, UX flows, architecture, implementation, deployment and iteration.
Official WhatsApp conversational channel for a municipal government in Argentina.
+1,000 monthly active users · +20,000 queries processed per month.
Handles citizen service, public requests, campaigns, emergencies and official documents.
Includes internal tooling for municipal teams to manage flows, content, complaints and metrics.
🛠️ TypeScript, Node.js, Express, PostgreSQL, Redis, Docker, WhatsApp Business API, Next.js, LangChain, OpenAI API
Incremental migration of a critical Express backend into NestJS without interrupting production services.
Domain-based modularization, typed DTOs and validation, healthchecks, Redis, observability and OpenAPI documentation.
Designed for gradual migration while keeping compatibility with legacy endpoints.
🛠️ TypeScript, NestJS, PostgreSQL, TypeORM, Redis, Docker, Prometheus, Grafana, JWT, OpenAPI
Public platform that connects residents with verified local professionals.
Professional profiles with institutional verification, search by category, profession and location.
Professional dashboard and direct WhatsApp contact, deployed for municipal use.
🛠️ Next.js, TypeScript, Tailwind CSS, OAuth, Workers, Jobs, Vercel, PostgreSQL
Own SaaS product for bookings and appointment management.
Multi-tenant architecture, subscription plans and feature limits, Mercado Pago subscriptions.
WhatsApp/email notifications and admin dashboard.
🛠️ Astro, React, Supabase, PostgreSQL, Docker, Tailwind CSS, Mercado Pago, WhatsApp API, Google Calendar API
Cross-platform mobile app for live radio/video streaming and on-demand content.
Published on Play Store and App Store.
Live audio/video streaming, on-demand content, analytics and push notifications.
🛠️ React Native, Expo
Full Stack Product Engineer, Product Engineer, Full Stack Developer and Software Engineer roles where I can help turn real problems into shipped digital products.
📫 Contact me:
- Portfolio: gianluca.dev
- Email: [email protected]
- LinkedIn: linkedin.com/in/gianlucapalmier