Perryhan Walid
Software Engineer
Cairo
Summary
Software engineer building reliable, high-leverage systems in complex operational domains — logistics, dispatching, and real-time decisioning. Language-agnostic and quick to adapt across stacks, with a focus on end-to-end ownership from design to production. Track record of delivering measurable business impact and navigating ambiguity in domains without clear precedent.
Overview
4
4
years of professional experience
2
2
Certifications
Work History
Software Engineer III
Breadfast
Cairo, Cairo Governorate
03.2025 - Current
- Designed, built, and own the Auto Assign Engine end-to-end — Breadfast’s dispatching system handling thousands of daily orders, currently at 100% rollout across the Supermarket and Aggregator verticals, replacing fully manual workflows in both.
- Delivered measurable operational impact in Supermarket (vs. manual dispatch): 12.2% lower P90 delivery time, 57.6% lower Late %, 56.3% lower SLA Violation %, 51.1% fewer customer complaints, 11% higher Orders/Trip, and 19.8% fewer trips.
- Translated fulfillment-point coordinator intuition into a scientific, data-driven model that reasons over traffic, demand, courier capacity, geographic topology, and delivery associate tiering.
- Led release orchestration for every cross-functional Auto Assign rollout — sequenced work across teams, ran the test plan, unblocked engineers.
- Prevented a fleet-service-wide outage on-call — diagnosed runaway memory pressure at 95% with cascading OOM errors and improvised a live cache eviction; service remained available, and the fix was generalized post-incident.
Ruby Software Engineer
OneOrder
Cairo, Cairo Governorate
01.2024 - 02.2025
- Spearheaded the development and implementation of a comprehensive Notification System, complete with a robust content management framework.
- Significantly improved the integration of Paymob’s services within our Ruby gem, extending its functionality across Egypt and the UAE, and contributed to the gem’s development.
- Innovated settings management to dynamically handle configurations across multiple countries, enhancing the adaptability of our systems.
- Achieved an expert level of understanding in API operations, enabling quick identification and resolution of issues, thereby minimizing downtime and improving system reliability.
- Consistently delivered a 100% bug-solving success rate, serving as the go-to expert for diagnosing and resolving critical issues.
- Optimized the CI/CD pipeline, identifying and resolving the primary bottlenecks to reduce build times from 7 minutes to just 2 minutes—a ~71% reduction.
Java Software Developer
United OFOQ
Cairo, Cairo Governorate
08.2022 - 01.2024
- Played a pivotal role in the maintenance and enhancement of the company’s proprietary Java Framework, FABS, ensuring its robustness and scalability.
- Drove significant performance improvements in the framework by enhancing DD resolution, which directly resulted in a reduction of the OTMS (HR solution product) codebase by 3000 lines.
- Led the development of a cutting-edge microservice for Face ID checking, integrating seamlessly with Microsoft Azure, thereby enhancing security measures and user verification processes.
- Identified and meticulously refactored poorly performing modules within the OTMS product, optimizing operational efficiency and system responsiveness.
Education
Bachelor - Computer Science
01.2024
Skills
Languages: TypeScript, Ruby, Java EE, JavaScript, SQL, Python, C
Frameworks: NestJS, Ruby on Rails, Spring Boot, Vuejs, Quasar, Graphiti, ThymeLeaf
Certification
AWS Certified Cloud Practitioner
Timeline
Software Engineer III - Breadfast
03.2025 - Current
Ruby Software Engineer - OneOrder
01.2024 - 02.2025
Java Software Developer - United OFOQ
08.2022 - 01.2024
Ain Shams University - Bachelor, Computer Science