IDENTITY // VERIFIEDAJ TATUMSOFTWARE ARCHITECT · TECHNICAL LEAD
20+YEARS
THE ORIGIN STORY
Not all heroes wear capes. Some inherit legacy code.
I’ve spent my career translating ambitious ideas and stubborn business problems into secure, maintainable software. I work across architecture and implementation, bring calm to production problems, and help teams make decisions they can still defend six months later. I especially love workflow automation—eliminating repetitive handoffs so people can focus their attention where it actually matters.
NEURAL ARCHITECTURE
ADHD is my superpower.
I’m neurodivergent, and I see that different wiring as an engineering advantage. It fuels the curiosity to keep pulling on a problem, the pattern recognition to connect details others may miss, and the hyperfocus to turn a complicated idea into a working system.
Pattern recognitionRelentless curiosityCreative problem solvingDeep-focus delivery
Outcomes from healthcare, financial services, legal technology, education, and consulting.
01Optum / VA70%
Efficiency Gain
Replaced a manual, error-prone claims workflow with a PostgreSQL-backed .NET service using MediatR and domain-driven design. Automated the handoffs that used to require four people checking spreadsheets, cutting processing time 70% and manual errors 85% for a mission-critical VA healthcare system.
02OPIE Software800+
Clinics Served
Designed and built a RESTful ASP.NET Web API microservices platform from scratch on AWS, replacing a legacy Classic ASP monolith. Shipped 15 supplier integrations—including QuickBooks, Lawson, and Dynamics GP—that let clinics automate purchasing instead of re-keying orders by hand.
03Optum / VA85%
Error Reduction
Rebuilt a manual, spreadsheet-driven process into an automated .NET system with proper validation and domain rules baked in, instead of relying on people to catch mistakes after the fact. The result: an 85% drop in error rates for a mission-critical VA healthcare application, where a bad record isn’t just an inconvenience—it can affect patient care.
04Mobile Campus60K
Texts in 20 Minutes
Built a messaging platform that queued and dispatched bulk SMS across 15 university campuses without hitting carrier throttling limits—turning a multi-hour manual blast into a 20-minute automated send.
FIELD RECORD
Built in the real world.
Two decades of shipping, modernizing, and leading across healthcare, banking, legal technology, SaaS, education, and entrepreneurship.
Optum / Department of Veterans Affairs
Application Technical Lead
Architected a modern, PostgreSQL-backed healthcare application using .NET, C#, MediatR, and domain-driven design. Led and mentored four junior developers while using automation to improve operational efficiency by 70% and reduce manual errors by 85%.
LexisNexis
Application Lead
Modernized legacy .NET Framework 4.6 applications to .NET 8 and led their migration to Azure and Kubernetes. Built an event-driven solution using Azure Service Bus and Functions to extract data from incoming PDFs and persist it to SQL Server.
Huntington Bank
Technical Lead
Architected the modernization of legacy systems from .NET Framework to .NET 6, building ASP.NET Core applications and APIs around SOLID principles. Diagnosed C# and SQL performance issues, mentored junior developers, and designed management dashboards that enabled data-driven decisions.
AJ Tatum Digital
Founder / Application Technical Lead
Founded a web architecture and digital marketing consultancy that helps startups and established businesses build, maintain, and market customer-facing applications powered by Azure, event-driven architecture, and marketing automation.
OPIE Software
Senior Developer / Team Lead
Built RESTful ASP.NET Web API microservices for a healthcare SaaS platform serving more than 800 clinics, including 15 supplier integrations in an AWS-hosted environment. Helped lead the migration from Classic ASP to ASP.NET MVC and Angular while delivering integrations with QuickBooks, Lawson, and Microsoft Dynamics GP.
Academy Medical · Aaron’s · Mobile Campus
CTO / Lead Developer
Built and led technology initiatives across two startups and a major enterprise dashboard and CRM program. Delivered a company-wide CRM and SEO-driven public website at Academy Medical, KPI dashboards and internal ASP.NET/DotNetNuke tools at Aaron’s, and a messaging platform at Mobile Campus that scaled to 15 universities and delivered 60,000 messages in under 20 minutes.
THE ARSENAL
Modern engineering. Battle-tested judgment.
I’m a full-stack technologist who has spent two decades moving fluidly between enterprise .NET architecture and scrappy self-hosted infrastructure—equally at home designing DDD systems for healthcare or wiring together n8n, databases, APIs, and Azure Functions. My toolkit spans languages, Azure and Google Cloud, CMS platforms, automation, infrastructure, analytics, and marketing technology—and keeps growing with whatever the next problem demands.
Languages
C#JavaScriptT-SQLPowerShellPython
Frameworks & Platforms
.NET 6–10ASP.NET Core / Web APIEntity FrameworkMediatRDomain-Driven DesignReactAngular
Databases
SQL ServerPostgreSQLAzure SQLCosmos DB
Cloud & DevOps
Azure App ServicesAzure FunctionsAzure DevOpsDockerKubernetesAzure Service Bus
Delivery
Git / GitHubCI/CD PipelinesAgile / Scrum
AFTER-HOURS R&D
73 workloads. One relentlessly curious brain.
My homelab runs on curiosity, automation, and the dangerously optimistic phrase, “This should only take an hour.” It’s where ADHD-fueled rabbit holes become containers, dashboards, workflows, and occasionally an entirely redesigned network. I get to experiment, break things safely, and turn “what if?” into something useful—usually before my brain finds the next fascinating problem.
60LXC containers12Docker applications1Home Assistant VM
LinkedIn recommendations from managers, clients, colleagues, and people AJ has led.
“
AJ played a big role in finishing a proof-of-concept project under tight deadlines and changing requirements. He was able to move with agility on the project and provided good ideas to help improve and finish the project. Overall, AJ is a friendly, understanding and resourceful guy to work with and would be a good fit on many teams.
I worked with AJ on integrating the OPIE Purchasing software with our own internal systems. The project was a success and much of that was because of AJ's attention to detail, task and time management skills, and field expertise. He understood our business requirements and was able to provide guidance on implementation details and best practices. Having AJ on the project had a direct impact on the project's success.
AJ is an excellent problem solver, a real human computer. He gained a reputation at OPIE Software as the go-to guy if you encountered a bug or needed code reviewed, as he would kindly solve everyone’s problems with ease. His knowledge and experience with multitudes of technologies make him an incredible asset to any team. I personally learned a lot about how to be a better programmer while working with AJ.
Research Software Engineer III, University of Florida
Worked with AJ · May 2017
03 / 17
“
AJ is an awesome, unique talent. Super-smart, strong dev background, and a passion for the human side of technology. He offers a great combo of deep, varied technical experience and excellent relationship skills. I love that he shows up as a human being, and isn’t afraid to show his caring for other human beings. Definitely an asset to any team that is lucky enough to have him.
Business Intelligence & Healthcare Analytics Leader
Managed AJ directly · May 2017
04 / 17
“
AJ always has his mind on the latest technologies and frameworks that are available. His motivation for finding new and intriguing solutions to the problems that we face in the technology industry definitely brings to light things that can easily be missed. He is a hard worker with many qualities that I found valuable while working together.
AJ is a very detail-oriented programmer who worked hard to learn more about our clients. His work was always well thought out and he regularly met his deadlines. AJ was also able to see how pieces of software were valuable to our clients as well as how satisfied clients were critical to the future of our company.
Having worked with AJ for over three years, I can say with absolute certainty that there are few people in the world that can generate and implement fresh ideas like he can. AJ is as talented a programmer and planner as I have ever known. He possesses a real gift for moving projects forward in an efficient and timely manner. If you are looking for someone to join your team, or to lead it, AJ certainly won't disappoint.
Andrew was a dedicated team member at Academy Medical. Andrew showed a propensity to problem solve with innovative ideas in his IT field. Andrew worked in an office and also remotely with many branches of a fast-growing company nationwide.
Andrew is a critical resource for Academy Medical. Beyond being self-directed, energetic, creative, and enthusiastic, he has a high attention to detail.
Andrew is a brilliant mind that built Finheaven and Co. from his own personal fan site about the Miami Dolphins to one of the most popular destinations for Dolphins fans on the web. When I came onboard with ideas to enhance the reach of the site, he listened and embraced many of those ideas. Andrew is a very brilliant individual and would be an asset to any company in need of IT expertise and much more.
It’s rare that you'll find a more thoughtful technology expert. He’s intellectually curious beyond belief. It’s the Andrews of the world that actually make technology work. He’s dedicated beyond belief. When we worked together, I asked for him to build stuff we'd never seen before—overnight—and he'd deliver.
Andrew is a tireless advocate for improvement as a businessman. I would highly recommend Andrew for any organization looking for stability, growth and technical knowledge.
Andrew was the best IT person I have worked with. He has a vast knowledge of current technology and is extremely capable of conveying this knowledge in a way that less tech-savvy individuals can understand. I was always comfortable having him attend meetings due to his ability to communicate clearly and effectively, and the professional manner in which he conducted business.
Vice President of Public Affairs, Texas Medical Association
Worked with AJ · September 2010
13 / 17
“
Andrew led all aspects of the Mobile Campus technology and managed the related technical partnerships with ease. He’s smart, hard working, and a pleasure to work with.
Andrew did a fantastic job running FinHeaven, where I was a columnist. He’s very detail oriented, smart, and easy-going. I cannot recommend him enough.
Andrew proved capable of creating solutions to new issues around mobile text-based advertising, worked well in the long-distance and virtual environment, and was focused on providing excellent technology support to our team. I enjoyed the opportunity to work with Andrew.
In my 20 years in technology, I can count on one hand how many people possess the raw technology and business savvy that Andrew possesses. Whether he is building an application, designing a website, or installing a complex CRM application, he does it quickly, accurately, and with the best customer service skills around. He has an innate ability to hear business needs and apply them to technology.