
Fullstack Developer
Over the course of his career, Mostafa progressed from a mid-senior engineer to a team lead, taking ownership of complex systems and driving impactful results. His achievements include building a queued email pipeline capable of processing 10,000 emails every five minutes, scaling systems from approximately 200,000 to 2.7 million users, and leading a migration of over 25 million records with minimal disruption.
Recognized for his ownership, clear communication, and mentoring, Mostafa aligns engineering efforts with business goals, unblocks teams, and consistently prioritizes performance, reliability, and long-term scalability.
Breach Secure Now is a US-based cybersecurity training and awareness platform. Mostafa was promoted from mid-senior to lead, managing backend infrastructure and bug management processes.

Delivered customized software solutions across various industries, developing complete web applications and APIs with full-stack ownership.
Karezma is a technology solutions provider focused on developing custom business applications and IoT integrations.

Ceramica Prima is a ceramics manufacturing company where he progressed from production management into R&D, working across operations, optimization, and process automation.
All Fullstack Developers who have applied to Proxify are scored from 0 to 300 on engineering excellence, one of the five parameters we evaluate. This score reflects engineering excellence only, based on interviews, take-home assignments, live coding sessions, and/or on-the-job performance reviews. The curve shows how all evaluated Fullstack Developers are distributed across that range, where our acceptance threshold for this parameter sits, and where Mostafa stands.
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