Yonas Woldemariam
Senior Software Engineer | Full Stack Senior .NET Developer with over 20 years of experience in both
greenfield and brownfield development, designing, developing, and optimizing complex, scalable
applications across legal, healthcare, government consulting, retail workforce management, benefits
administration, and programmatic media advertising. Proven ability to lead teams, mentor developers,
and implement solutions for complex systems while adhering to best practices and modern design
patterns
REVIEWS FROM CLIENTS
- Modernized a legacy Windows Forms system into a scalable, modular WPF application built on
.NET Core with C#, followi...
- Modernized a legacy Windows Forms system into a scalable, modular WPF application built on
.NET Core with C#, following modern development practices to improve performance,
maintainability, and future readiness.
● Own end-to-end delivery — from architecture and development to direct client collaboration —
ensuring alignment with business goals and technical milestones.
● Architected a modular WPF solution using MVVM and clean design principles, enabling future
migration to .NET MAUI.
● Delivered high-value modules including Firm/Contact Management, Conflict Entry, Time Entry,
and Medical Illustrations, streamlining the client’s core business workflows.
● Integrated AI-assisted tools (GitHub Copilot, ChatGPT, Cursor) to accelerate prototyping and
reduce troubleshooting time by ~30%.
● Mentored an in-house developer to transfer knowledge, enabling the client to maintain and
extend the system independently after project completion.
Converted from contractor (Insight Global, Apr–Nov 2022) to full-time Leidos employee on FAA’s NISC IV
program, based on outstan...
Converted from contractor (Insight Global, Apr–Nov 2022) to full-time Leidos employee on FAA’s NISC IV
program, based on outstanding performance and delivery.
GSA and DHS Leases Application - PEGASUS application managing multimillion-dollar FAA property
leases.
● Architected and led development, ensuring scalability, performance, and business alignment.
● Collaborated with business analysts to translate complex requirements into technical and
architectural designs.
● Produced architecture documents that were approved during client Critical Design Review
(CDR).
● Prepared sprint plans, task breakdowns, and effort estimates.
● Led development efforts by implementing core system components
Utility Management Application (UMA) Cloud Migration - Mission-critical PEGASUS application
modernized from .NET Framework to .NET Core and migrated to the cloud for scalability and efficiency.
● Played a key role in migrating this mission-critical PEGASUS application to the cloud, resolving
critical bugs blocking production readiness.
● Diagnosed and resolved critical production issues, enabling successful migration.
● Improved performance of “Export to Excel” feature by 95% over the legacy version, significantly
enhancing usability and efficiency.
● Refactored UMA codebase to improve maintainability, flexibility, and testability using
Dependency Injection (DI).
● Collaborated with the PEGASUS migration team to deliver a stable, cloud-ready solution.
● Resolved critical issues in PEA 2.0, a mission-critical Provider Enrollment Application, prior to golive
and provided post-rel...
● Resolved critical issues in PEA 2.0, a mission-critical Provider Enrollment Application, prior to golive
and provided post-release production support to ensure stability and timely delivery.
● Mentored developers on WCF services, environment setup, and application internals, reducing
onboarding time and improving troubleshooting efficiency.
● Optimized slow-performing UI components and SQL Server stored procedures, improving
responsiveness for large-scale data operations.
● Remediated Acunetix-identified vulnerabilities to ensure secure, compliant release.
● Delivered deployment packages and client-facing demos that streamlined release cycles and
reinforced stakeholder confidence.