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Luis – Python, React, AWS, experts in Lemon.io

Luis

From Canada (UTC-7)flag

Full-stack Web Developer|Middle-to-senior
Front-end Web Developer|Senior
Back-end Web Developer|Middle-to-senior
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Luis – Python, React, AWS

Luis is a full-stack software engineer with nearly 9 years of professional experience, specializing in frontend development (React, TypeScript, JavaScript) while maintaining strong backend expertise in Python, Django, and Flask. He excels at designing scalable web applications and distributed systems, approaching challenges with a methodical, reliable, and solution-oriented mindset. Luis demonstrates a Product- and Client-first approach, consistently considering user needs, deadlines, and business goals, and applying pragmatic prioritization to focus on high-impact features. Experienced in both independent work and cross-functional collaboration, he delivers user-centric, high-value solutions that balance technical excellence with real-world impact.

9 years of commercial experience in
Data analytics
E-learning
Edtech
Graphics
Open source
Main technologies
Python
6 years
React
7 years
AWS
9 years
JavaScript
1 year
Typescript
7 years
Django
6 years
Additional skills
GitHub Actions
Jest
REST API
Webpack
Cypress
CSS
Meteor
CI/CD
Amazon S3
HTML
RabbitMQ
Django REST
Jenkins
React Native
jQuery
Flask
MySQL
Redux
D3.js
Direct hire
Possible
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Experience Highlights

Senior Software Engineer
Dec 2010 - Ongoing14 years 9 months
Project Overview

An online learning and content delivery platform designed to help creators build secure member areas for hosting digital courses, subscriptions, and other educational materials. The system enables structured course management, student engagement tracking, and seamless delivery of multimedia content to learners worldwide.

Responsibilities:
  • Refactored legacy monolithic applications into modular micro frontends;
  • Introduced end-to-end testing using Cypress, improving QA reliability;
  • Made architectural and technical decisions on new features;
  • Collaborated with product managers and designers to ensure secure, viable solutions;
  • Developed features that enhanced content creators’ experience and satisfaction.
Project Tech stack:
Typescript
JavaScript
React
HTML
CSS
GitHub Actions
CI
CD
Meteor
Webpack
REST API
Amazon CloudFront
Amazon S3
Jest
Cypress
Senior Software Engineer
Dec 2019 - Nov 202010 months
Project Overview

A comprehensive platform for managing remote assessments, designed to ensure exam integrity and a smooth user experience. It offers secure access, real-time monitoring of participants, and the ability to intervene if any irregularities are detected. The system supports various types of assessments, from quizzes to full-length exams, providing detailed reporting and analytics for educators and recruiters.

Responsibilities:
  • Designed the architecture for back-end and front-end applications, ensuring scalability, security, and smooth integration between components;
  • Developed remote student monitoring features, including real-time video and audio surveillance, to maintain exam integrity;
  • Enhanced the student experience, covering login flows, browser setup guidance, and support for both multiple-choice and open-ended questions;
  • Implemented assessment management tools, enabling instructors to create, schedule, and track exams efficiently;
  • Optimized performance and reliability of the platform to handle multiple concurrent assessments and high volumes of user interactions.
Project Tech stack:
Python
Django
React
JavaScript
HTML
CSS
Jenkins
Microsoft SQL Server
AWS
Django REST
RabbitMQ
Firebase
Software Engineer
Jul 2017 - Nov 20203 years 3 months
Project Overview

An intelligent and multifunctional platform for managing a question bank, featuring detailed usage history, item calibration, and version control. The system allows educators and administrators to efficiently create, update, and track questions, ensuring high-quality assessments and data-driven insights into question performance.

Responsibilities:
  • Architected and implemented core system components, ensuring modularity and smooth interaction between services;
  • Designed and optimized relational databases to support complex querying and high data consistency;
  • Developed interfaces and workflows for content creation, enabling users to efficiently manage multiple-choice and open-ended questions;
  • Established a structured question review process, including tracking feedback and maintaining version control;
  • Engaged with clients and stakeholders to clarify requirements, identify pain points, and propose tailored solutions for their assessment needs.
Project Tech stack:
Python
Flask
Django
JavaScript
Typescript
React
CI
CD
Microsoft SQL Server
Redux
Senior Software Engineer
Jul 2017 - Dec 20192 years 5 months
Project Overview

An intelligent platform designed to manage large-scale essay correction and open-ended question assessments. The system streamlines the review process, ensures consistency, and provides detailed analytics on student performance. It has been applied in high-stakes exams taken by millions of students annually.

Responsibilities:
  • Engineered front-end and back-end solutions for the digital exam correction platform, ensuring responsive and reliable performance;
  • Built a comprehensive exam review interface, featuring scanned exam display, stylus-supported annotations, and multiple writing styles for accurate grading;
  • Implemented a reviewer support system, including ticket creation, issue tracking, and integration with the overall correction workflow;
  • Developed advanced security features, including two-factor authentication with one-time passwords and unique session handling for user accounts.
Project Tech stack:
Python
Django
Microsoft SQL Server
AWS
RabbitMQ
HTML
CSS
Typescript
React
React Native
Canvas
Software Engineer
Jul 2016 - Jul 20171 year
Project Overview

An open-source data visualization platform designed to leverage large datasets for supporting decision-making and scientific research. The system enables users to explore, analyze, and interpret complex data, fostering a data-driven approach in both public and private sectors.

Responsibilities:
  • Developed new visualizations for large-scale public healthcare datasets, enabling insights and analysis of Brazil’s DataSUS data;
  • Built a content management system (CMS) for blog posts, streamlining content creation and publication workflows;
  • Optimized data presentation and interactivity, allowing users to explore and filter datasets easily for better decision-making;
  • Collaborated with stakeholders to gather requirements and ensure visualizations met analytical and reporting needs;
  • Maintained platform performance and reliability, ensuring smooth access to complex data for both researchers and public users.
Project Tech stack:
Python
MySQL
AWS
Flask
JavaScript
HTML
CSS
jQuery
D3.js

Education

2019
Computer Engineering
Bachelor
2024
Postgraduate in Software Engineering
Postgraduate

Languages

English
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