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César Silva

@csarsilva

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Backend engineer at eduNEXT who contributed to Pearson Skilling Suite APIs serving 10,000+ users.

Venezuela

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At eduNEXT, I contributed to backend development for Pearson Skilling Suite, built on open-source OpenEdX and serving ~10,000+ users. I developed and maintained RESTful APIs with Django and Django REST Framework.

I also designed and optimized database schemas and queries to prevent performance bottlenecks and improve response times. My work included JWT-based authentication, role-based access control, and PyTest unit tests.

At Simpletrivia (Formerly Ticking App by Ubicutus ), I designed backend services with Django REST and PostgreSQL. I developed asynchronous processes with Celery and real-time features using Django Channels, and refactored code to achieve performance improvements of up to 2x.

At Ubii Pagos, I developed backend services for Ubii Market using Flask, MySQL, and SQLAlchemy. I also worked on database optimization, automated payment reconciliation scripts, and HTML/CSS email templates.

Experience

Work history, roles, and key accomplishments

Middle Backend Engineer

eduNEXT

Apr 2023 - Dec 2025 (2 years 8 months)

Contributed to backend development for Pearson Skilling Suite built on open-source OpenedX, serving ~10,000+ users. Developed and maintained RESTful APIs using Django and Django REST Framework, and optimized database schemas and queries to improve response times.

Django Django REST Framework REST APIs PostgreSQL JWT Role Based Access Control Pytest Docker GitHub Actions Git

Django Backend Developer

Simpletrivia

Apr 2021 - Feb 2023 (1 year 10 months)

Designed and implemented backend services using Django REST and PostgreSQL, along with unit testing with PyTest. Developed asynchronous processes with Celery and real-time features using Django Channels (WebSockets).

Django Django REST Framework PostgreSQL Pytest Celery Django Channels WebSockets EC2 Sentry

Flask Backend Developer

Ubii Pagos

Jul 2019 - Feb 2020 (7 months)

Developed backend services for an e-commerce platform (Ubii Market) using Flask, MySQL, and SQLAlchemy. Designed relational database schemas and optimized queries, improving execution time by up to 200%.

Flask MySQL SQLAlchemy Database Design Query Optimization Python HTML CSS

Education

Degrees, certifications, and relevant coursework

Universidad Simón Bolívar

B.Sc., Computer Engineering

Pursued a B.Sc. in Computer Engineering with relevant coursework in data structures, algorithms, database systems, software engineering, and machine learning.