David O - Full Stack Engineer

Summary

Full Stack Engineer with 9+ years of experience developing scalable web and mobile applications, with strong expertise in Python, Django, Django REST Framework, and React Native. Experienced in designing high-performance backend APIs, building cross-platform mobile applications, and integrating systems in cloud environments such as AWS and Azure. Solid background in database design with PostgreSQL and MySQL, API-driven architectures, and performance optimization.

Technical Skills

Languages

Python, JavaScript, TypeScript, SQL

Backend

Django, Django REST Framework, Node.js, Express.js, REST APIs, GraphQL

Frontend

React, React Native (iOS & Android), Next.js, Angular, HTML5, CSS3, Tailwind CSS

Databases

PostgreSQL, MySQL, MongoDB, Redis

Cloud & DevOps

AWS (EC2, S3, Lambda), Azure, Docker, CI/CD Pipelines, GitHub Actions

Testing

PyTest, Jest, Cypress, Unit Testing, API Testing

Work Experience

Full Stack Engineer

Zco Corporation

Remote (USA) | Jun 2022 - Present

Engineered scalable backend services using Django and DRF for high-availability applications. Built React Native mobile features for iOS and Android. Designed RESTful APIs for real-time transactional workflows. Developed optimized PostgreSQL schemas and integrated third-party services through REST APIs and webhooks.

Full Stack Developer / Analytics Engineer

Agência M2BR

Rio de Janeiro, Brazil | Apr 2019 - Apr 2022

Developed backend systems using Python and Django for high-volume analytics platforms. Built API layers with DRF for frontend dashboards. Designed and optimized PostgreSQL schemas for data-intensive operations. Automated data workflows and background processes.

Full Stack Developer

Code Farm

Brazil | Dec 2017 - Jun 2019

Built full-stack web applications for e-commerce platforms using Python and JavaScript. Developed REST APIs for order processing and payment integration. Optimized backend performance through query tuning. Built monitoring and logging features.

Education

Bachelor's Degree in Mathematics and Computer Science

Federal University of Rio Grande do Sul

2013 - 2017