CalDoc
Practice management software for doctors in Argentina: online booking, digital medical records and WhatsApp reminders.
Built with Next.js, PostHog, Sentry, Cloudflare
Sebastian Casal
Senior software engineer in Tucumán, Argentina. I build front ends and admin tools with React, Next.js and Vue, and the Node and Go services behind them.
What I work with
Frontend
React, Next.js, Vue with Pinia, TypeScript, Tailwind CSS and Sass
Backend
Node.js, Express, Go and Python, with GraphQL and Apollo
Data and cloud
PostgreSQL with Drizzle, DynamoDB, S3, AWS Amplify and Google Cloud
Tooling and auth
Contentful, Jest, Webpack, Clerk and Better Auth
Projects
See all 4 projects| Project | What it does | Built with |
|---|---|---|
| QRDyno | Dynamic QR codes with scan analytics, branded designs and landing pages you can edit after printing. | Next.js, Clerk, Radix UI, PostHog, Vercel |
| Covid Latam | A Spanish-language PWA with Covid figures for Latin America, built to ship on Android. | React, Ionic |
| Covid API | Serves World Health Organization Covid data as a REST API. | Node.js, Express |
Experience
- Jul 2025 – Oct 2026
Senior Software Engineer at Dialpad
Built and maintained Dialpad’s marketing site, plus integrations with ServiceNow, athenahealth, Microsoft Dynamics and HubSpot, working directly with clients on the specs and on a shared component library.
Next.js, GraphQL, Apollo, Contentful, Tailwind CSS, Vue, Pinia, Python, Google Cloud
- Mar 2022 – Jul 2025
Senior Software Engineer at Amazon Ring
Principal front-end engineer on two admin panels. Cut the onboarding time for a new Ring device from 40 hours to 1.
React, Next.js, Vue, TypeScript, Go, Node.js, DynamoDB, S3
- Nov 2020 – Mar 2022
Senior Software Engineer at Taller Technologies
Built Adobe Experience Manager components for a PwC project and migrated jQuery code to React.
React, Adobe Experience Manager
- Aug 2018 – Nov 2020
Web UI Developer at Globant
UI components and performance work for clients including Dell EMC, Hallmark and Nissan. Mentored junior developers and QA.
JavaScript, React, Sass
Teaching and mentoring
- React and Node.js teacher at Rolling School2020–2021
- Mentor in Globant’s Girls Programming program2019–2020
- Mentor for developers and QA at Globant2018–2020
Write to me
For freelance work, a job opening or a question about one of these projects.