Diego Leon

Lead engineer for an online applicant tracking, job posting, resume management, scoring, and hiring workflows platform.

• 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 for job posting, 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 that parses documents, extracts skills/experience signals, and ranks fit for recruiter workflows.
• Modernize UI from DevExpress MVC to DevExpress Blazor while managing CI/CD, zero-downtime deployments, SSL/TLS lifecycle, PCI validation, AWS backups, and incident response.

Contract development and application support for healthcare/pharmacy environments using the Microsoft technology stack.

• Deliver contract development and application support using .NET 10/C#, SQL, Blazor/Razor, APIs, and cloud-connected architecture.
• Design, test, document, and enhance internal frontend/backend applications while supporting API integrations and complex SQL queries/stored procedures.
• Perform Tier 2/3 production troubleshooting and collaborate with QA, Infrastructure, CIO/Business Operations, and agile stakeholders on cloud/microservices improvements.

Built scalable web, mobile, and cloud-connected applications for healthcare education and certification.

• 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 for a mobility and ride-dispatch platform.

• 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.

Founder and architect of AI-powered legal and agentic API products including Lex OS and TechForAGI Gateway.

• Architected Lex OS, an AI-powered legal operating system for case analysis, jurisprudence exploration, OCR-enabled document intake, evidence panels, per-case workspaces, and administrative controls.
• Built TechForAGI Gateway, an agent-native API gateway for autonomous AI systems to discover services, request quotes, process tasks, and receive structured machine-readable responses.
• Designed a Super RAG architecture combining semantic retrieval, legal-atom/verified-holding concepts, vector indexes, SQL/graph sources, retrieval audits, prompt orchestration, and evidence grounding.
• Directed AI product decisions around LLM prompts, tool/function calling, OCR workflows, source attribution, usage metering, latency/cost tracking, and API monetization patterns.

Supported cloud-hosted web and desktop applications for HOA and community management.

• 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.

Founded and led delivery of a COVID-19 telehealth platform with symptom reporting, teleconsultation, and video consultations.

• 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, production environments, DevOps culture, and backend banking APIs.

• 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 customer support platforms for microfinance banking.

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

AI-powered legal operating system for case analysis, jurisprudence exploration, OCR-enabled document intake, evidence panels, per-case workspaces, and administrative controls.

Agent-native API gateway enabling 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 that parses applicant documents, extracts skills/experience signals, and ranks candidate fit against job requirements.

Community and product portfolio spanning AI-assisted engineering workflows, developer mentorship, and agentic product exploration.