About
I've been building software professionally since 2020, mostly in fintech and high-scale platforms. I've designed APIs, payment integrations, and microservices that handled over 25,000 transactions a day for half a million users. Along the way I've built CRMs, IoT backends, and even a delivery platform that helped 21,000 people get essentials during the pandemic.
I care about code that's maintainable, systems that scale, and building things people actually use. I currently work with TypeScript, Node.js, Go, React, and Kubernetes — but I'm always learning what's next.
Experience
Backend Developer
Digital Node · Táchira, Venezuela · Hybrid
- Designed and built a CRM for a local ISP — managed users, payments, and network connections programmatically, helping the company scale from hundreds to thousands of clients (Node.js, React, Firebase).
- Developed a microservices infrastructure handling +25K transactions/day for +500K users across a mobile payments platform (Kubernetes, Node.js, GCP).
- Worked directly with banks and phone carriers to integrate cross-payment and subscription automation.
- Built an IoT data collection backend for water-conservation sensors in Colombian páramos (Node, AWS, MQTT).
- Built a WhatsApp chatbot with AI to help users find spare parts and connect businesses with buyers.
Full Stack Developer
Dapps · Barranquilla, Colombia · Remote
- Contributed to backend and web app development, including architecture and technology decisions.
- Worked with DevOps to improve CI/CD pipelines and containerised deployments (GitHub Actions, Docker).
- Designed and built an API connecting TripAdvisor data with local points of interest for a tourism platform (NestJS, Postgres, Prisma).
- Developed the Visit Cartagena website and managed database migrations.
Full Stack Developer
Birchwood · Dubai, UAE · Remote
- Designed and built a CRM for a real estate company, including lead management from external sources, property tracking, and customer meeting scheduling.
Full Stack Developer
A la Carta Online · San Cristóbal, Venezuela
- Developed the first delivery startup in the city, helping +21K people access food, medicine, and groceries during the pandemic.
- Built cloud functions and real-time order tracking connecting clients, businesses, and drivers (Node.js, Firebase, Mapbox).
- Created a chat system to coordinate all parties through the delivery workflow.
Frontend Engineer
Capacítese 21 · Colombia · Hybrid
- Designed and built interactive educational games and animations for kids learning English.
- Developed a course progress tracker for students.
Skills
Frontend
Backend
Infra & DevOps
Databases
Other
Contact
I'm open to interesting projects across the stack — whether it's backend architecture, full-stack apps, or something I haven't tried yet. If that sounds like something you need, I'd love to talk.
dnlsalazar27@gmail.com