Mohamed Aziz Doss

Backend engineer with 4+ years of professional experience in production environments, designing, building, and maintaining scalable backend services and RESTful APIs. Strong with relational and NoSQL databases, domain-driven design, and clean, well-tested code backed by code reviews and documentation. Takes full ownership of critical components across their lifecycle, from design and implementation to operation and continuous improvement, and has a strong track record of identifying performance bottlenecks and technical debt and driving improvements.

Comfortable with containerization and CI/CD, and used to agile, cross-functional collaboration.

Backend Engineer at ClassQuiz (2023-12 – Present)

High-traffic web platform serving 200,000+ registered users.

• Designed, built, and maintained scalable backend services and RESTful APIs, taking ownership of critical components across their full lifecycle.
• Identified performance bottlenecks and technical debt and drove improvements, cutting API response times by 40%.
• Ensured high code quality through automated testing, code reviews, and documentation, reducing production regressions by 90%+.
• Applied domain-driven design across relational and NoSQL databases, and shipped safely through CI/CD and containerized environments.
• Collaborated with product, frontend, and cross-functional teammates to deliver end-to-end features.

Backend Engineer at Envast (2021-10 – 2023-10)

Software agency delivering backend services and API integrations for international clients.

• Built and shipped backend services and RESTful APIs integrated with external systems for real client products.
• Improved performance by 25% through database design, composite indexing, and query refactoring.
• Worked in agile, cross-functional teams, following shared standards and CI/CD to ship reliably.

Engineering Degree in Software Engineering – EPI Digital School (2021-09 – 2025-06)

Bachelor in Computer Science – Higher Institute of Applied Science and Technology (ISSATS) (2018-09 – 2021-06)