Abdallah Ali

Team Lead / Senior Backend Engineer at Anjum (2024-01 – Present)

Led the re-architecture of a ~497K-line legacy.NET Framework ERP across 2,300+ files into a modular, API-first.NET 8 platform built on Clean Architecture, DDD, and CQRS — 239 handlers across 438 command and query objects spanning 17 bounded domain areas.
Exposed core ERP functionality through 140+ REST API endpoints, replacing the legacy direct-database WinForms model and enabling multi-client access, third-party integration, and a modern web UI.
Cut average read-endpoint response time by 72% (820ms to 230ms) with a Redis caching layer, and lifted peak transaction throughput 5x (240 to 1,200 operations per minute) by offloading accounting, billing, and inventory processing to RabbitMQ-based async queues.
Architected the platform for horizontal scalability using stateless API services, distributed caching, and message-driven processing over a database-per-tenant model, allowing it to scale out as tenant load grew.
Led a 4-engineer team — owning sprint planning, backlog, and code-review and QA gates in Jira — improving on-time delivery from 68% to 94% across 9 releases, cutting defect escape rate by 55%, and reducing customer issue-resolution time from 11 to 3 days.
Increased automated test coverage ~100x (24 to 2,382 unit and integration tests across 298 files) by establishing a platform-wide testing standard, and supported adjacent teams with backend and architectural guidance across Android, web, and integration-service workloads.

Software Engineer at Alrabea (2022-10 – 2023-12)

Built the Android client in Java for a mosque-services app, integrating backend REST APIs for prayer times, content, and notifications across 5K+ installs.
Structured the app using Clean Architecture and MVVM (ViewModel, LiveData), separating UI, domain, and data layers to isolate business logic and improve testability.
Reduced app cold-start time by 25% by adding local caching with Room and SharedPreferences for prayer schedules and frequently viewed content.
Designed reusable components around SOLID and OOP principles, applying dependency injection with Dagger/Hilt to decouple modules and simplify testing.

Junior Software Engineer at IBack (2022-02 – 2022-10)

Built a licensing and subscription management service in.NET for industrial software, handling activation and validation for 1K+ licensed installations.
Implemented encrypted software activation using AES and machine-bound license keys, preventing unauthorized use across offline and online clients.
Reduced invalid activation attempts by 20% by adding server-side license validation and tamper checks to the authentication workflow.
Built reusable authentication and license-validation modules following OOP and SOLID principles, simplifying integration across multiple product lines.

Freelance Software Engineer at Mostaql (2020-01 – 2022-12)

Delivered 12 end-to-end projects for clients and early-stage startups through the Mostaql platform, earning a 4.9/5 average client rating across all engagements.
Built applications across mobile, desktop, and web — using Flutter, Kotlin, native Android and iOS, Xamarin, WPF, and WinForms on the front end, backed by ASP.NET, Laravel, and Node.js services.
Managed each engagement independently from requirements and architecture through delivery and handoff, adapting to a different technology stack for every contract.

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