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I have twenty-plus years of experience designing, developing and architecting web-based solutions across multiple industries, including enterprise applications for manufacturing and government clients. My recent work centers on building microservices with .NET 9, Azure, SQL Server and Blazor, and I have spent a decade using .NET Core and Azure to deliver cloud-native solutions with CI/CD. I have taught IT courses at Ivy Tech Community College for twelve years and am certified in project management. In addition to hands-on development, I have served as project manager, architect, mentor and IT instructor. I value standards-driven development, customer-focused requirements and a service philosophy, and I enjoy guiding teams toward robust, maintainable software.…I have twenty-plus years of experience designing, developing and architecting web-based solutions across multiple industries, including enterprise applications for manufacturing and government clients. My recent work centers on building microservices with .NET 9, Azure, SQL Server and Blazor, and I have spent a decade using .NET Core and Azure to deliver cloud-native solutions with CI/CD. I have taught IT courses at Ivy Tech Community College for twelve years and am certified in project management. In addition to hands-on development, I have served as project manager, architect, mentor and IT instructor. I value standards-driven development, customer-focused requirements and a service philosophy, and I enjoy guiding teams toward robust, maintainable software.

David R. Marrero

Back-End Developer, Cloud Developer, Database Developer, +6

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I have twenty-plus years of experience designing, developing and architecting web-based solutions across multiple industries, including enterprise applications for manufacturing and government clients. My recent work centers on building microservices with .NET 9, Azure, SQL Server and Blazor, and I have spent a decade using .NET Core and Azure to deliver cloud-native solutions with CI/CD. I have taught IT courses at Ivy Tech Community College for twelve years and am certified in project management. In addition to hands-on development, I have served as project manager, architect, mentor and IT instructor. I value standards-driven development, customer-focused requirements and a service philosophy, and I enjoy guiding teams toward robust, maintainable software.…I have twenty-plus years of experience designing, developing and architecting web-based solutions across multiple industries, including enterprise applications for manufacturing and government clients. My recent work centers on building microservices with .NET 9, Azure, SQL Server and Blazor, and I have spent a decade using .NET Core and Azure to deliver cloud-native solutions with CI/CD. I have taught IT courses at Ivy Tech Community College for twelve years and am certified in project management. In addition to hands-on development, I have served as project manager, architect, mentor and IT instructor. I value standards-driven development, customer-focused requirements and a service philosophy, and I enjoy guiding teams toward robust, maintainable software.

Available to hire

I have twenty-plus years of experience designing, developing and architecting web-based solutions across multiple industries, including enterprise applications for manufacturing and government clients. My recent work centers on building microservices with .NET 9, Azure, SQL Server and Blazor, and I have spent a decade using .NET Core and Azure to deliver cloud-native solutions with CI/CD. I have taught IT courses at Ivy Tech Community College for twelve years and am certified in project management.

In addition to hands-on development, I have served as project manager, architect, mentor and IT instructor. I value standards-driven development, customer-focused requirements and a service philosophy, and I enjoy guiding teams toward robust, maintainable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

French

Beginner

Work Experience

Sr. Software Engineer at Lelander

October 1, 2024 - Present

• Implemented microservices (.Net 9, Azure, MSSQL, Azure functions) for selected needs • Built Playwright End-to-End UI testing app (Blazor, node.js, Docker, Azure container app) • Performed database updates and maintenance as needed • Participated in Agile development processes, including sprint planning and weekly stand-ups

Sr. Software Engineer at Paradigm Software

October 1, 2024 - June 30, 2025

• Researched and prototyped new and advanced initiatives such as Power BI, orchestration, hybrid cache, centralized logging with writer-reader channels, Indexed DB (WASM), SEQ logging, and Azure container apps (.Net 9) • Prepared research reports and diagrams related to new initiatives • Performed Blazor WASM client coding as needed • Followed WCAG and other standards as stipulated by the project plan • Participated in Agile processes, including sprint planning, stand-ups, retrospectives, and code reviews

Sr. Software Engineer at Walker Health Force (Humana Military):

March 1, 2024 - August 30, 2024

• Implemented customized Azure B2C UI for authentication, Graph API and custom authentication policies. • Researched and adapted architecture to support .NET 8 migration. • Prototyped new application components for reliability and performance in a microservices environment. • Developed microservices using .NET 8, including Web APIs and Azure Functions.

Sr. Software Engineer at State of Courts of Indiana

October 1, 2023 - February 28, 2024

• Assisted with modernization of the state court information system by integrating SQL Server databases, Azure Functions, and Blazor UI. • Developed localization strategies to manage court records seamlessly across multiple languages. • Designed and implemented a scalable architecture to localize database content and user interfaces. • Configured SQL Server 2019 to support multiple API and UI endpoints for over 700 courts statewide. • Leveraged .NET 8 and Web API technologies to enhance functionality and interoperability.

Sr. Software Engineer at Soltech - Client: QHR

August 1, 2022 - February 1, 2023

• Implemented healthcare insurance systems with X12 HIPPA EDI claims processing. • Utilized Jira, MSSQL, C#, LINQ, Azure Functions, Logic Apps, and Azure Data Factory (ADF). • Led the overhaul of a complex Azure Logic App by implementing a set of Azure Functions. • Implemented App Insights and database tracking for performance metrics, success rates, etc. • Assisted in QHR’ s upgrade to .NET 8, focusing on enhancing system reliability and performance. • Engineered a distributed architecture w/ multiple Azure Functions and Azure Data Factory pipelines. • Processed thousands of medical insurance claims daily, interfacing with the EDI portal for status updates. • Managed queued responses and orchestrated database updates based on processed claims data.

Freelance Consultant and Lead Developer at XLR8R Technologies

September 23, 2025 - December 1, 2023

• Led development and served as architect and database designer for automotive repair industry client. • Developed .Net (Ver 3-8) MVC / C#/ Blazor / Knockout applications for shop management, product catalogs, invoicing, inventory, and repair orders. • Leveraged MSSQL for DB design and Azure services (Azure Storage, Azure Functions, CI/CD). • Played pivotal role in designing scalable, efficient solutions tailored to the automotive repair sector • Collaborated closely with stakeholders to ensure alignment with project objectives and timelines.

Sr. Software Engineer at SAIC - Crane Naval Warfare Center (NSWC)

April 1, 2009 - July 30, 2022

• Lead developer for application architecture, SQL Server design & development, C#, .Net Web API development, and jQuery front-end development. • Designed and built the OPS Center (OC), a project-task-risk management application. • Implemented and managed internal access controls within OC, using nine permission levels • Collaborated with stakeholders and end-users to gather requirements and ensure project alignment. • Implemented robust error handling and logging mechanisms in the OPS Center. • Conducted performance optimization and scalability for increased data volumes and user loads. • Provided technical mentorship and guidance to junior developers, fostering team development. • Engaged in code reviews and QA activities to maintain high standards of code integrity and software quality.