Diego Leon

Lead engineer for an online applicant tracking platform evolving from legacy MVC to modern Blazor and AI-powered hiring workflows.

• Lead migration from legacy MVC to Blazor Server, evolving a monolithic applicant-tracking platform into a modern service-oriented architecture with .NET 10 / ASP.NET Core APIs.
• Design, develop, and operate multi-tier web applications across Azure and AWS, supporting job posting workflows, applicant tracking, HR document automation, and secure business modules.
• Build and extend NinjaGig AI Suite for AI-powered resume processing, scoring, and candidate-job matching using Gemini/Vertex AI, multi-model LLM evaluation, prompt design, structured extraction, and recruiter-facing ranking workflows.
• Architect scalable backend services and API integrations for payments, job feeds, transactional email, optimized SQL strategies, secure data models, and cloud-ready AI service boundaries while modernizing UI and managing CI/CD, zero-downtime deployments, and PCI validation.

Contract development and application support for healthcare/pharmacy systems using .NET 10, Blazor, APIs, and AI-assisted engineering workflows.

• Deliver contract development and application support for a healthcare/pharmacy environment using .NET 10/C#, SQL, Blazor/Razor, APIs, cloud-connected architecture, and AI-assisted development workflows.
• Design, test, document, and enhance internal frontend/backend applications while supporting API integrations, complex SQL queries/stored procedures, and Tier 2/3 production troubleshooting.
• Collaborate with QA, Infrastructure, CIO/Business Operations, and agile stakeholders on cloud/microservices-oriented improvements, support procedures, code reviews, sprint planning, and secure/performance-minded fixes.

Built scalable web, mobile, and cloud-connected applications and led Xamarin-to-.NET MAUI migration.

• Built scalable web, mobile, and cloud-connected applications using .NET 8/.NET 6, Blazor, Razor, .NET MAUI, Azure B2C, and Azure DevOps pipelines.
• Led Xamarin-to-.NET MAUI migration and coordinated a small engineering team, improving mobile architecture and cross-platform maintainability.

Designed real-time, event-driven ride operations and cross-platform driver/operator experiences.

• Designed real-time, event-driven ride operations using .NET, EF Core, RabbitMQ, SignalR/WebSockets, Blazor, and .NET MAUI.
• Built cross-platform driver/operator experiences, reusable Blazor components, queue-based communication patterns, and live location workflows.

Supported cloud-hosted web and desktop applications with agile delivery and production troubleshooting.

• Supported cloud-hosted web and desktop applications with .NET 6/.NET Framework 4.8, Azure infrastructure, agile delivery, and production troubleshooting.

Delivered enterprise web and desktop applications for contact center and cloud communications.

• Delivered enterprise web and desktop applications using C#, ASP.NET, MVC, .NET Core, Entity Framework, SQL Server, RESTful APIs, and Scrum practices.

Led a 125-person team delivering COVID-19 telehealth, symptom reporting, and event-driven .NET solutions.

• Led a 125-person technology, health, and marketing team to deliver COVID-19 symptom reporting, WhatsApp teleconsultation, web workflows, Twilio WebRTC video consultations, microservices, and event-driven .NET solutions.

Managed nationwide application infrastructure, DevOps culture, and backend banking APIs across Azure and on-premises environments.

• Managed nationwide application infrastructure, production environments, DevOps culture, Azure Boards/Pipelines/Repos/Tests, Git, Terraform, VMware, SQL Server, IIS, Windows Server, Azure Cloud, and backend banking APIs.

Built and integrated banking applications, APIs, and real-time customer support platforms.

• Built and integrated banking applications, APIs, SQL Server workflows, customer support platforms, SignalR, sockets, WebSockets, REST/SOAP services, and .NET web/desktop solutions.

Architected an AI-powered legal operating system using Gemini/Vertex AI and multi-model LLM workflows for case analysis, jurisprudence exploration, OCR-enabled document intake, evidence panels, per-case workspaces, and administrative controls.

Built an agent-native API gateway for autonomous AI systems to discover services, request quotes, process tasks, and receive structured machine-readable responses.

AI-powered resume processing, scoring, and candidate-job matching product using Gemini/Vertex AI, multi-model LLM evaluation, prompt design, structured extraction, skills/experience parsing, and recruiter-facing ranking workflows.

Founder-led GenAI portfolio spanning Tech For People Global Corp, TechForAGI, and community developer mentorship and AI/product initiatives.