Malvin De Nuñez Estevez, Developer in Jersey City, NJ, United States
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Malvin De Nuñez Estevez

Verified Expert  in Engineering

Full-stack Developer

Jersey City, NJ, United States
Toptal Member Since
June 25, 2021

For over three years, Malvin has been part of a Fortune 100 tech company as a full-stack developer working with customers to transform the way they build products based on design thinking and Agile methodologies. He has engaged with clients of different sizes in new development into production as well as infrastructure modernization journeys. His versatility and depth in development practices enable him to deliver responsive and scalable cloud-native applications.



Preferred Environment

React, Node.js, Flask, Spring Boot, Docker, Kubernetes, MacOS, Visual Studio Code (VS Code), Git, Slack

The most amazing...

...thing I've developed is the web application for one of the top three rental car companies in the USA.

Work Experience

Full-stack Developer | Consultant

2018 - PRESENT
Fortune 100 Tech Company
  • Created a web app from scratch into production consisting of Node GraphQL BFF, Java Spring Boot Microservices, React UI, and containerized Kubernetes deployments for a major rental car company. Early data showed an increase in conversion rates.
  • Built a web application for a federal client consisting of Python Flask and React UI deployed into a Kubernetes environment with Argo CD, Tekton pipelines, and RQ workers to perform analytics on documents. Increased analysts' productivity.
  • Developed a REST API using Java Quarkus to manage the lifecycle of IBM MQ queues, wrapping a legacy API for a major US bank. Greatly enhanced security, maintainability, and management.
  • Created a Node Express.js and React web application for admins to manage engagement delivery supporting automatic email alerts and role-based OAuth authentication, increasing efficiency and easing communication.
  • Developed a Java Spring Boot and React web application to manage the lifecycle of engagement requests until their delivery supporting CSV ingestion and automatic emails, increasing efficiency and visibility of the process.
Technologies: Python, React, Java, Spring Boot, Flask, Postman, Express.js, Node.js, Kubernetes, Docker, CI/CD Pipelines, Agile

Analytics App for a Federal Client

I served as a full-stack developer in an application to extract analytics from free-text documents. The application consisted of a Python Flask back end and React UI deployed into a Kubernetes environment with ArgoCD, Tekton pipelines, and RQ workers for background tasks. This app significantly increased the analysts' productivity.

Web Application for a Rental Company

Contributed to creating a new web app as a full-stack developer. It consisted of Node GraphQL BFF, Java Spring Boot microservices, React UI, and Kubernetes deployments for a rental car company that produces billions of dollars in revenue to progressively replace their legacy site. Early data showed an increase in conversion rates.
2016 - 2017

Master's Degree in Electrical and Computer Engineering

Carnegie Mellon University - Pittsburgh, PA


React, Node.js, REST APIs


Postman, Jenkins, Git, Slack


Python, Java, GraphQL


Data Science, Agile


Flask, Spring Boot, Express.js


Unix, Docker, Kubernetes, MacOS, Visual Studio Code (VS Code)


Scripting, Tekton, Argo CD, CI/CD Pipelines

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