Logo
Rob – React Native, Node.js, Typescript, experts in Lemon.io

Rob

From Costa Rica (UTC-6)flag

Mobile Developer|Senior
Back-end Web Developer|Middle-to-senior

Rob – React Native, Node.js, Typescript

Rob is a Senior Frontend/Mobile Engineer with 16+ years of experience, strong in React Native, TypeScript, and Node.js. He has built systems from the ground up at a blockchain startup and improved adoption at Edmodo by streamlining user flows. Skilled across cross-platform mobile, Expo, Redux, React Query, Next.js, and Tailwind, with AWS and Azure certifications, he thrives in startups, balancing delivery with client communication. While better suited as a hands-on contributor than lead, his React Native and frontend expertise make him a valuable senior asset for product-driven teams.

17 years of commercial experience in
Banking
Blockchain
Cloud computing
Cybersecurity
Data analytics
E-learning
Fintech
Gambling
Healthcare
Marketing
NFT
Sports
CMS
Enterprise software
Mobile apps
Web3
Gaming software
Web development
Main technologies
React Native
7 years
Node.js
5 years
Typescript
8 years
Next.js
4 years
Additional skills
React
Direct hire
Possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Senior React Developer
Oct 2022 - Oct 20231 year
Project Overview

The Tidbits library was a proprietary component library developed and used internally at Apple. It provided reusable UI and functional components designed to maintain consistency, scalability, and performance across Apple’s internal and customer-facing applications. By leveraging Tidbits, teams could accelerate development, ensure design alignment with Apple’s standards, and reduce redundancy in building common interface elements.

Responsibilities:

Rob was responsible for the following:

  • delivered advanced visualizations using D3 and RxJS;
  • built complex UI workflows with accessibility and test coverage;
  • led adoption of Jest and React Testing Library;
  • collaborated across global Agile teams.
Project Tech stack:
React
Typescript
Ramda
D3.js
RxJS
SASS
Jest
Enzyme
Senior Software Engineer
Sep 2021 - Sep 20221 year
Project Overview

A Web3 social engagement platform designed to connect emerging athletes with fans through membership-based interaction, live shows, digital content, and NFT drops. Built to help athletes monetize their Name, Image, and Likeness (NIL), the platform enabled storytellers to create gated experiences, including exclusive livestreams, digital assets, and membership tiers - all powered by blockchain-enabled fan engagement and monetization.

Responsibilities:

Rob's tasks included the following:

  • developed and integrated Solidity smart contracts;
  • delivered mobile-first React Native and Next.js apps;
  • deployed with Docker and GitHub CI/CD on GCP;
  • ensured performance optimization and full test coverage.
Project Tech stack:
React
React Native
Next.js
Angular
Typescript
Solidity
Rust
GraphQL
Jest
Docker
AWS
GCP
Senior Web Engineer
Dec 2018 - Sep 20212 years 8 months
Project Overview

Supported global education platform with 20M+ users, migrating core modules to modern frontend and backend stacks for scalability and SEO.

The client was an educational technology platform launched in 2008 to serve as a secure, social-learning environment for K-12 education. It enabled teachers to create virtual classrooms, share lessons, assign quizzes, grade submissions, and communicate with students and parents - functioning much like a Facebook for schools. It also supported collaboration among educators and provided tools for resource sharing and assessment tracking. Its user base grew to over 100 million across more than 60,000 schools, making it a widely adopted solution in primary and secondary education

Responsibilities:

Rob's scope of duties included:

  • migrated core modules to React, Next.js, and TypeScript;
  • integrated Node.js, Ruby on Rails, and C# backends;
  • delivered cloud-ready features with AWS/Azure;
  • designed testing strategy with Jest, Enzyme, NUnit.
Project Tech stack:
React
React Native
Next.js
Typescript
Node.js
.NET Core
Ruby on Rails
Python
C#
Jest
Enzyme
NUnit
AWS
Microsoft Azure
Senior Web Engineer
Feb 2013 - Dec 20185 years 10 months
Project Overview

Built CMS-integrated solutions and marketing tools for Fortune 500 clients like Mazda and Purina. It was a digital marketing and creative agency that focused on combining strategy, design, and technology to deliver impactful campaigns. The company worked with global brands to create customer experiences across digital platforms, commerce, and communications, helping businesses strengthen engagement and drive growth, including building CMS-integrated solutions and marketing tools for Fortune 500 clients like Mazda and Purina.

Responsibilities:

Main duties included the following, but were not limited to:

  • built CMS-integrated solutions with Sitecore/Umbraco/EpiServer;
  • architected front-end with React/Angular;
  • deployed on AWS with CI pipelines;
  • collaborated with cross-functional teams on campaigns.
Project Tech stack:
React
Angular
Node.js
Python
C#
AWS
Microsoft Azure
Software Engineer
May 2011 - Feb 20131 year 9 months
Project Overview

This customer was a global provider of financial technology solutions, offering modern banking applications that integrate core banking, CRM, transaction processing, and analytics into a unified platform. Built on a flexible, API-first, microservices architecture, these solutions enable financial institutions to streamline operations, accelerate product innovation, and deliver improved customer experiences.

Responsibilities:

Main duties included, but were not limited to:

  • built secure apps with C# and ASP.NET MVC;
  • developed REST APIs for financial transactions;
  • maintained performance/security in high-load systems.
Project Tech stack:
C#
ASP.NET MVC
JavaScript
Microsoft SQL Server
REST API
jQuery
Software Engineer
Oct 2008 - May 20112 years 6 months
Project Overview

It was a Costa Rica - based provider of live dealer casino solutions. It specialized in streaming real-time games like blackjack, roulette, and baccarat for online and land-based operators, serving multiple iGaming clients until ceasing operations in 2017.

Responsibilities:

Rob was tasked with the following:

  • built gaming platforms and backend services;
  • designed scalable APIs for game sessions;
  • developed UI layers with HTML5, CSS, ActionScript.
Project Tech stack:
C#
ASP.NET
ASP.NET MVC
Microsoft SQL Server
HTML
CSS
SASS
ActionScript
Adobe Flash

Education

2009
Computer Engineering
Bachelor
2013
Business and Marketing
MBA

Languages

Spanish
Advanced
English
Advanced

Hire Rob or someone with similar qualifications in days
All developers are ready for interview and are are just waiting for your requestdream dev illustration
Copyright © 2025 lemon.io. All rights reserved.