Available to hire
I’m Joseph Martinez, a senior full stack engineer with 15+ years of experience designing, modernizing, and supporting enterprise web applications across healthcare, technology services, security, government, and cloud infrastructure. I build and improve C#/.NET and SQL Server back ends with REST APIs, secure workflow-driven features, and data validation/reporting systems that help teams reduce manual effort and improve reliability.
I also focus heavily on performance, maintainability, and operational efficiency—optimizing stored procedures and indexing, strengthening role-based access controls with audit logging and PHI-conscious handling, and delivering scalable internal tools for DevOps/SDLC workflows. In recent work, I’ve incorporated AI-assisted SDLC practices, agentic workflow concepts, and RAG-style knowledge retrieval to accelerate engineering productivity while keeping human-in-the-loop reviews for quality and safety.
Skills
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Language
English
Advanced
Spanish; Castilian
Intermediate
Work Experience
Senior Full Stack Engineer at KPN Health, Inc.
March 1, 2016 - PresentSpearheaded modernization of a healthcare provider portal using C#, ASP.NET, SQL Server, JavaScript, and REST APIs, improving page response times by 35% and reducing recurring user support requests by 30%. Architected role-based application workflows for provider, administrator, and internal operations users, improving task completion consistency by 25% and strengthening access control across 5+ user groups. Modernized legacy healthcare web modules via incremental refactoring, reusable service layers, and cleaner UI patterns, reducing high-priority production defects by 32%. Engineered backend data validation services for healthcare records, eligibility files, and operational datasets, improving data accuracy by 28% and reducing manual review effort by 40%. Integrated reporting workflows into SQL Server-driven reports to consolidate provider/patient program/operational reporting, cutting report turnaround from multiple days to same-day delivery. Optimized stored procedures, indexing st
Senior Full Stack Engineer at Praedx, LLC
July 1, 2012 - March 1, 2016Designed custom business operations platforms using C#, ASP.NET MVC, SQL Server, JavaScript, and jQuery, replacing spreadsheet-driven workflows and reducing manual administrative effort by 40%. Delivered full-stack modules for account management, approvals, work orders, user administration, and operational reporting, improving visibility across 4+ business functions. Consolidated client data into centralized SQL Server schemas and reusable services, improving reporting consistency by 30% and reducing duplicated data entry by 25%. Refactored fragile legacy .NET modules into cleaner service-oriented components, decreasing recurring application issues/defects by 35% while preserving existing workflows. Enhanced dashboards and reporting screens with searchable filters, export features, and optimized queries, reducing ad hoc report requests to developers by 50%. Tuned stored procedures, views, and indexes for high-usage reports, improving dashboard load times by 30% and supporting larger da
Senior Full Stack Engineer at PraxdX, LLC
July 1, 2012 - March 1, 2016Designed custom business operations platforms using C#, ASP.NET MVC, SQL Server, JavaScript, and jQuery, replacing spreadsheet-driven workflows and reducing manual administrative effort by 40%. Delivered full-stack modules for account management, approvals, work orders, user administration, and operational reporting, improving process visibility across 4+ business functions. Consolidated client data into centralized SQL Server schemas and reusable application services, improving reporting consistency by 30% and reducing duplicate data entry by 25%. Refactored fragile legacy .NET modules into cleaner service-oriented components, decreasing recurring application defects by 35% while preserving existing business workflows. Enhanced dashboards and reporting screens with searchable filters, export features, and query optimizations, reducing ad hoc report requests to developers by 50%. Tuned stored procedures, views, and indexes for high-usage reports, improving dashboard load times by 30% a
Senior Software Engineer at Apex CCTV
November 1, 2010 - June 1, 2012Developed CRM and service-management features for customer records, sales leads, installation requests, and support tickets, improving customer lookup speed by 30%. Customized ERP-style workflows for quotes, product records, service scheduling, and technician coordination, improving ticket tracking accuracy by 25%. Expanded storefront functionality for CCTV product categories, inquiry forms, and quote-request workflows, increasing online quote submissions by 20%. Revamped frontend screens using HTML, CSS, JavaScript, and jQuery, improving product navigation and reducing incomplete customer inquiry forms by 25%. Partnered with sales, service, and operations users to refine CRM screens and reporting needs, reducing missed follow-ups by 20% across customer-facing workflows.
Front-End Developer at Collin County
April 1, 2010 - November 1, 2010Refreshed public-facing county web pages using HTML, CSS, basic JavaScript, graphics, and document formatting, improving content consistency across 50+ pages. Produced optimized web graphics, banners, and page assets that reduced oversized image usage by 30% and improved page-load experience for public users. Organized web documents, links, notices, and department updates through structured publishing practices, reducing broken or outdated content by 25%. Coordinated with county departments and content reviewers to publish accurate public information, improving update turnaround time by 20%.
Application Developer at SoftLayer Technologies, Inc.
October 1, 2007 - March 1, 2010Built PHP-based internal tools for hosting operations, supporting workflows, customer/account lookups, and provisioning-related requests, improving internal request handling speed by 25%. Maintained web applications using PHP, HTML, JavaScript, Oracle, MySQL, and Subversion, supporting operational tools used by multiple infrastructure and support teams. Connected internal applications to Oracle and MySQL databases for account, task, and workflow data, reducing manual database lookups by 30%. Improved dotProject-based task tracking and project visibility through UI updates, workflow adjustments, and database-backed enhancements, increasing task status clarity by 25%. Supported SDLC activities including requirements review, development, testing, version control, and release coordination, contributing to biweekly or monthly internal tool updates. Configured reusable PHP modules and frontend components for internal staff tools, reducing duplicate development effort by 20% across similar wo
Education
Bachelor of Science (BSE) in Software Engineering at The University of Texas at Dallas
January 1, 2003 - January 1, 2007Bachelor of Science (BS) in Software Engineering at The University of Texas at Dallas
January 1, 2003 - January 1, 2007Bachelor of Science (B.S.) in Software Engineering at The University of Texas at Dallas
January 1, 2003 - January 1, 2007Qualifications
Industry Experience
Healthcare, Software & Internet, Government, Professional Services, Computers & Electronics, Financial Services
Skills
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