MARVIN
CALERO
Technical Lead & Senior Software Engineer
El Salvador
ABOUT
I'm a senior engineer and technical lead who builds things that work at scale. Eight-plus years shipping production software — from HIPAA-compliant healthcare platforms to mobile apps reaching thousands of daily users. I care about clean architecture, developer experience, and making complex systems feel simple. Currently leading cross-functional engineering teams and turning ambitious ideas into reliable, cloud-native products.
Education
Bachelor's in Systems Engineering and Computer Networks
Universidad Gerardo Barrios (opens in new tab) — 2016 — 2021
Technical Skills
- React
- Next.js
- Node.js
- TypeScript
- AWS
- React Native
- Expo
Also: NestJS, Express, .NET Core, Django, FastAPI, PostgreSQL, MongoDB, Redis, MySQL, DynamoDB, Docker, CI/CD, Go, Python, C#, Tailwind CSS
- 8+
- YEARS
- 4
- COMPANIES
- 20+
- PROJECTS
EXPERIENCE
2024 — Present
Technical Lead
NewCombin (opens in new tab)Leading cross-functional teams building scalable SaaS products with AI-driven workflows and event-driven pipelines.
- React
- Next.js
- Node.js
- NestJS
- Vue
- AWS
2024
Senior Full Stack Developer
Thrivelab (opens in new tab)Built HIPAA-compliant telehealth features and a React Native mobile app serving 3,000+ daily users.
- React
- React Native
- Expo
- Next.js
- NestJS
- TypeScript
2021 — 2023
Senior Software Engineer
GBH (opens in new tab)Built a React Native logistics suite and fault-tolerant messaging pipelines for enterprise clients across Latin America.
- React
- React Native
- Node.js
- AWS
- PostgreSQL
2018 — 2020
Full Stack Mobile Application Developer
A&B (opens in new tab)Built a flagship POS mobile app with payment processing and hardware integrations for retail businesses.
- Xamarin
- .NET
- SQL Server
- Azure
AVAILABLE FOR OPPORTUNITIES