AI-readable static portfolio page
Sterling Diaz is a Senior Full-Stack Engineer in Santo Domingo with 14+ years building .NET, React, Vue, Angular, mobile, API, healthcare, banking, payroll, insurance, and AI automation systems.
I'm Sterling Diaz, a full-stack engineer with 14+ years shipping production systems across banking, healthcare, insurance, payroll, and government.
Core stack is .NET/C# on the backend with React, Vue, or Angular on the front, and lately I've been building AI-assisted automation on top of it.
The timeline below walks through the work in order - open any entry for metrics, stack, and links.
Location: Santo Domingo, Dominican Republic.
Availability: US remote senior roles, relocation, or contract engagements.
2025 - AI automation engineer
An incident-resolution system designed to capture expert troubleshooting paths and use AI-assisted retrieval to resolve recurring technical problems faster.
Impact: Reduced mean time to resolution by an estimated 70% and saved 200+ engineering hours monthly.
Technologies: AI agents, Agent workflows, C#, .NET, SQL Server, Azure DevOps
2026 - Full stack software developer
A full healthcare management platform for on-demand nursing care and residential care, spanning backend, web, admin, and mobile.
Impact: Demonstrates full product ownership from architecture to deployment across multiple surfaces.
Technologies: .NET 10, React, React Native, SQL Server, Docker, Azure, GitHub Actions
2022 - 2024 - Modernization engineer
A tool that converted complex payroll stored procedures into structured, testable C# business services.
Impact: Compressed a large modernization effort and reduced manual conversion effort by up to 90%.
Technologies: C#, ASP.NET Core, Entity Framework, SQL Server, xUnit, Angular
2017 - Full stack developer
A branch audit and decision platform that turned security questionnaires and policy logic into automated compliance evaluation.
Impact: Reduced manual cross-referencing and accelerated security decision workflows for bank branches.
Technologies: C#, ASP.NET MVC, SQL Server, JavaScript, Active Directory
Links: GitHub
2016 - Full stack developer
A searchable internal staff portal integrated with Active Directory for a large banking institution.
Impact: Centralized staff information for 7,000+ employees and reduced HR lookup overhead.
Technologies: C#, ASP.NET, SQL Server, Active Directory, JavaScript
Links: GitHub
2014 - Inventor and full stack mobile developer
A civic mobile app for domestic violence reporting, emergency guidance, alerts, and geolocation support.
Impact: Won recognition for technology against gender violence and was publicly presented in the Dominican Republic.
Technologies: Mobile, C#, ASP.NET MVC, Geolocation, Push notifications
2019 - Personal project
A personal project for browsing and curating movie data - built to play with web stack patterns outside of work.
Impact: Side-project from 2019; archived for reference.
Technologies: Web development, Personal project
2017 - Personal project
Connect Four implementation - a small project to explore game logic and front-end interaction patterns.
Impact: Side-project from 2017; archived for reference.
Technologies: Game logic, Web development
Links: GitHub
2013 - Personal project
An early personal-finance tracker - one of my first end-to-end web projects.
Impact: Side-project from 2013-2014; archived for reference.
Technologies: Finance workflow, Web development
Links: GitHub
Daily driver. .NET services, REST and gRPC APIs, EF Core data access, JWT/OAuth auth, and clean-architecture/CQRS layouts on real production codebases.
Primary: C#, .NET Core / .NET 5-10, ASP.NET Core, Entity Framework, REST APIs, Clean Architecture
Also uses: C#, .NET Framework, .NET Core / .NET 5-10, ASP.NET Core, Entity Framework, EF Core, REST APIs, SOAP, gRPC, JWT, OAuth 2.0, RBAC, Microservices, CQRS, Mediator, DDD, Clean Architecture
I ship front-ends in whichever framework the team is on - React most often, Vue and Angular when the codebase calls for it, plus React Native for mobile.
Primary: React, TypeScript, Vue, Angular, React Native, Tailwind CSS
Also uses: Vue, React, Angular, TypeScript, JavaScript, HTML, CSS, Bootstrap, Material UI, Tailwind CSS, React Native, Expo, Android, jQuery, AJAX
SQL Server is home base. Azure for hosting, Docker for packaging, GitHub Actions or Azure DevOps for delivery, Serilog and AppInsights to keep an eye on production.
Primary: SQL Server, Azure, Azure DevOps, Docker, GitHub Actions, Serilog
Also uses: SQL Server, Oracle, MySQL, SQLite, Firebase, Azure, Azure DevOps, GitHub Actions, Docker, Kubernetes, IIS, Nginx, Apache, Kestrel, Serilog, AppInsights, PowerShell, Bash
xUnit and Vitest for unit, Playwright for E2E, plus a growing toolkit for AI-assisted automation: prompt engineering, agent workflows, MCP, and guardrails to keep agents accountable.
Primary: AI agents, Prompt engineering, MCP, xUnit, Playwright, Integration testing
Also uses: xUnit, NUnit, Vitest, Playwright, Integration testing, E2E testing, TDD, BDD, Prompt engineering, AI agents, Agent workflows, Semantic Kernel, Embeddings, MCP, Guardrails, Code generation, Debugging automation
Long arcs at single companies (7 years at Banreservas, 4 at Senasa) - the soft skills below were earned in long-running teams, not collected from quizzes.
Primary: Mentoring, Leadership, Problem solving, Communication, Decision making
Also uses: Adaptability, Critical thinking, Resilience, Problem solving, Team collaboration, Active listening, Decision making, Mentoring, Communication, Time management, Self motivation, Emotional intelligence, Creativity, Leadership, Project strategy
Reach out about senior full-stack roles, AI automation work, or contract engagements. Email and WhatsApp get the fastest reply; LinkedIn and GitHub are linked below.