Sterling Diaz AI-Readable Portfolio

Software Development Technologist - Las Americas Institute of Technology (ITLA)

2009 - 2012

Associate technical degree in Software Development Technology - my first formal grounding in writing software for a living.

• Software Development Technology track at ITLA.
• Foundation for the systems engineering work that came after.

Metrics: 2009-2012.

Technologies: Software development

Full Stack Mobile Developer - Lemo Consulting Group

2012 - 2015

Built Lynx Sales, an Android app for field sales reps that talked to SAP ERP and worked offline - sales, inventory, billing, routes, all syncing back when the device hit signal again.

• Developed Lynx Sales, a long-running Android sales application integrated with SAP ERP.
• Implemented offline-first behavior and background synchronization for remote field operations.
• Built route tracking, client-specific feature flags, and modules for national clients.

Metrics: 200+ sales representatives supported. 35% reported sales productivity increase. 20% reported revenue growth.

Technologies: Android, Java, C#, .NET, SAP ABAP, REST APIs, JavaScript, jQuery, Bootstrap, SVN

Links: Lemo Consulting Group Lynx Sales repository

Full Stack Mobile Developer - Procuraduria General de la Republica

2014

Women's Shield turned mobile software into a safety instrument, combining alerts, guidance, geolocation, and complaint flows for people facing domestic violence.

• Invented, designed, and developed the mobile application and web services.
• Supported alert flows through SMS, push notifications, geolocation, emergency guidance, and incognito-mode behavior.
• Recognized as a winning civic technology project for violence prevention.

Metrics: 1st place TIC recognition for preventing gender violence with a mobile app.

Technologies: Mobile development, Web services, C#, ASP.NET MVC, JavaScript, SQL, Geolocation, Push notifications

Links: Project video Hoy coverage Audiencia Electronica coverage

Full Stack Systems Analyst - Banco de Reservas (Banreservas)

2015 - 2022

Seven years inside the country's largest bank: security and compliance tooling, internal platforms (Employee Directory, Candidate Voting System, Decision Maker), and a steady stream of workflow automation that took manual processes off engineers' and auditors' plates.

• Designed and deployed Decision Maker, a branch audit and compliance platform.
• Engineered Employee Directory with Active Directory integration as a central staff information source.
• Built Candidate Voting System to automate recognition workflows.
• Automated administrative and reporting workflows for IT and compliance teams.
• Supported secure coding practices, technical support, and system maintenance over a seven-year tenure.

Metrics: 7,000+ staff members centralized in Employee Directory. 300+ bank branches supported by audit automation. Reduced manual lookup, compliance, and reporting overhead across teams.

Technologies: C#, ASP.NET MVC, .NET Core, Entity Framework, SQL Server, REST APIs, React, JavaScript, ADO.NET, IIS, Active Directory, PowerShell, Git

Links: Decision Maker Employee Directory

Full Stack Web Developer - ARS Humano

2017

Optimized the institutional web portal, kept internal service pages healthy, and helped scope the reengineering of a new platform.

• Optimized institutional portal performance.
• Maintained internal service pages for integration quality.
• Collaborated on planning and early reengineering of a new portal.

Metrics: ~45% page-load improvement after the optimization pass.

Technologies: C#, ASP.NET MVC, SQL Server, PHP, REST APIs, JavaScript, jQuery, AJAX, Bootstrap, Git

Links: Virtual Affiliate Office

Systems Engineering - Universidad Dominico-Americana (UNICDA)

2018 - 2021

Bachelor of Engineering in Systems Engineering - the formal grounding behind years of production work, completed in parallel with full-time engineering roles.

• Bachelor of Engineering / Systems Engineering.
• Pursued in parallel with senior IC work at Banreservas and the ARS healthcare insurers.

Metrics: 2018-2021.

Technologies: Systems engineering

Programmer Analyst - ARS Palic (MAPFRE)

2018 - 2019

Built the institutional portal and a Conciliation Module that let healthcare providers upload payment spreadsheets, validate them against business rules, and track approval - the country's first insurer to handle medical claims fully online.

• Developed and deployed the institutional portal and Conciliation Module.
• Integrated web, desktop, Oracle Database, file servers, and business validation services.
• Delivered dynamic, filterable reporting dashboards for concurrent users.

Metrics: 8,000+ healthcare providers enabled to submit, validate, and track payment spreadsheets. 100,000+ records processed daily by the validation engine. First insurer in the country to offer automated, web-based medical claims processing and approval digitally.

Technologies: C#, ASP.NET, ADO.NET, Windows Forms, WebForms, ASP.NET MVC, .NET Core, Entity Framework, Oracle Database, REST APIs, JavaScript, jQuery, AJAX, Bootstrap, SVN, Git, IIS

Links: Providers Medical Claims

Senior Full Stack Web Developer - ARS Senasa

2019 - 2023

Four years on the country's largest public health insurer: built and maintained the Virtual Affiliate Office, the Sofia chatbot, the App SeNaSa backend APIs, and the process automation that took friction out of affiliate workflows.

• Developed and maintained enterprise web platforms and RESTful APIs.
• Built and deployed Sofia chatbot and the Virtual Affiliate Office portal.
• Maintained and enhanced backend APIs for App SeNaSa.
• Proposed UI/UX and process improvements to reduce complaints and retain customers.

Metrics: 4M+ affiliates supported. 50,000+ active mobile users supported by App SeNaSa APIs. 40% estimated reduction in call-center and branch visits for digitized workflows.

Technologies: C#, ASP.NET Core, Entity Framework, SQL Server, .NET Core Web API, React, Vue, JavaScript, Java Android, Bootstrap, Tailwind, Git, Azure DevOps

Senior .NET / Angular Developer - Insperity / Encora

2022 - 2024

Payroll and HR modernization for Insperity: shipped the Conversion Tool, Validation Engine, Gross-To-Net, and Calculation modules, and built the SQL-to-C# automation that made the migration tractable.

• Designed and delivered payroll processing modules using ASP.NET Core and Angular.
• Built an automated SQL-to-C# conversion tool for legacy stored procedures.
• Implemented Conversion Tool, Validation Engine, Gross-To-Net, and Calculation modules.
• Applied CQRS, Mediator, dependency injection, unit testing, and integration testing patterns.

Metrics: 200+ enterprise clients served. 700+ legacy stored procedures parsed and re-architected into .NET Core services. 90% effort reduction and a 5-year modernization roadmap compressed to 2 years. Major modules carried from requirements through production with zero critical regressions.

Technologies: C#, ASP.NET Core, Entity Framework, SQL Server, REST APIs, Angular, TypeScript, Material UI, xUnit, Git, Azure DevOps, CQRS, Mediator

Senior Full Stack Software Developer - Bupa Global Latinoamerica

2025

At Bupa, I stabilized a mission-critical healthcare platform and built AI-assisted incident resolution so repeated technical problems could be diagnosed with speed and consistency.

• Resolved critical defects and delivered new features across Amigos+.
• Built SmartIncidentSolver using AI automation and rule-driven agent workflows.
• Contributed to migration from legacy VB.NET modules toward modern .NET Core services.

Metrics: 200+ critical defects resolved. 15+ features delivered. 35% estimated stability improvement. 70% mean-time-to-resolution reduction. 200+ engineering hours saved monthly.

Technologies: VB.NET, ADO.NET, C#, .NET Core, Entity Framework, SQL Server, REST APIs, React, TypeScript, Bootstrap, Git, Azure DevOps, AI agents, Agent workflows

Full Stack Software Developer - Freelance - Sol y Luna / NursingCare

2026 - Present

Sol y Luna / NursingCare is listed as a greenfield platform for on-demand nursing care and residential care, covering backend API, responsive web application, admin portal, and cross-platform mobile application.

• Architected the platform from scratch using clean architecture and DDD principles.
• Designed care request lifecycle, nurse scheduling, availability, client profiles, and service catalog management.
• Designed payment workflow, payroll foundations, expense tracking, banking information, financial reporting, and audit-safe transaction logging.
• Built JWT authentication, RBAC, protected endpoints, session management, structured logging, centralized error handling, Docker and CI/CD pipelines.

Metrics: Four delivery surfaces: backend, public web, admin portal, and mobile app. 60% estimated reduction in time from design to working implementation through AI coding agents and prompt-driven workflows. 80% estimated reduction in manual deployment effort through repeatable pipeline design.

Technologies: C#, .NET 10, ASP.NET Core, Entity Framework Core, SQL Server, JWT, Serilog, REST APIs, React 19, TypeScript, Vite, Material UI, React Native, Expo, Axios, React Router, xUnit, Vitest, Docker, Nginx, GitHub Actions, Azure App Service, Azure SQL, Swagger/OpenAPI

SmartIncidentSolver

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

NursingCare

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

SQL-to-C# Conversion Tool

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

Decision Maker

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

Employee Directory

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

Women's Shield

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

Links: Video Coverage

Sterling Movies

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

Links: Bitbucket Drive

Connect Four

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

Easy Finance Personal

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

Backend systems

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

Frontend and mobile

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

Data, DevOps, and operations

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

Quality, automation, and AI

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

Professional skills

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

Systems Engineering

Dominico-Americano University (UNICDA) - 2018 - 2021

Bachelor of Engineering / Systems Engineering formation.

Software Development Technology

Las Americas Institute of Technology (ITLA) - 2009 - 2012

Associate technical formation in software development.

Scrum Fundamentals Certified

SCRUMstudy - 2022

Agile and Scrum fundamentals certification.

Verify

Test of English for International Communication

ETS - 2021

Standardized English communication assessment.

Standard English Test

Self-reported (LinkedIn) - Self-reported

Additional English assessment recorded on LinkedIn.

SmallTalk English Speaking Level Test

Self-reported (LinkedIn) - Self-reported

English-speaking level assessment recorded on LinkedIn.

Advanced Mobile Development in Android

Altice Group - 2017

Advanced mobile development training.

Sun Certified Java Associate

Oracle - 2013

Oracle Certified Associate for Java Standard Edition 5 and 6.

Credly

C# (LinkedIn assessment)

LinkedIn Skill Assessment - Self-reported

Top-tier badge from the LinkedIn C# skill assessment.