Mohamed Abdalgader

Contributed core improvements to the global open-source navigation engine:

• Redesigned turn instruction fallback cascade to prioritize OpenStreetMap destination tags over internal road references, delivering accurate highway guidance.
• Fixed a data inheritance leak causing unnamed roundabout exits to mistakenly inherit roundabout names.
• Engineered geometry-based fallback algorithms and dynamic angle thresholds to override speed-based instruction suppression at motorway exits and complex Y-forks.

Event-driven distributed grocery delivery platform orchestrating Order, Inventory, Packing, and Delivery microservices. Designed asynchronous communication via Apache Kafka, implementing the Saga pattern for multi-service transactions, idempotent consumer processing, and version-based optimistic locking. Sustained 98.5 req/s at 6ms p95 latency under concurrent load testing.

Intelligent bilingual news aggregation platform with microservices ingestion pipelines. Built asynchronous worker queues with Celery and Redis, real-time sentiment polarity detection using fine-tuned RoBERTa and MARBERT models, and millisecond-level semantic embeddings with pgvector.

High-performance URL expansion and inspection API. Integrated Redis caching achieving 50 req/s with 35ms p95 latency, backed by automated GitHub Actions CI/CD.

Microservice transaction ledger with automated spare-change round-up investments, JWT role-based access control, OpenAPI documentation, and optimistic concurrency locks.

Automated media engine generating synchronized Quranic verse video compositions through scriptable FFmpeg pipelines and audio waveform alignment.

First-person exploration experience. Engineered decoupled OOP interaction systems, dynamic state-shifts, and AI NavMesh pathfinding.

Lexical and syntax analyzer for the Tiny programming language, building deterministic symbol verification tables and abstract syntax trees.