I build things that work and teams that ship.
I spent six years as the technical leader of a healthcare data SaaS company — building our platform from a proof of concept, leading the engineering team, owning product decisions alongside our CEO, and writing code throughout. We built a multi-component platform – SQL Server backend, client-facing applications, a reporting engine generating millions in annual revenue – that served the health insurance industry. That company was ultimately acquired.
After the acquisition, I led the technical integration: migrating systems, data, and clients into the acquiring company’s enterprise platform. I’ve been through the full arc — building a product from zero, scaling it, selling the company, and then integrating everything on the other side.
What I do best is take a product from early-stage architecture through production-grade delivery, while building and managing the engineering team that sustains it. I’m most effective in smaller companies where I can partner directly with founders, own technical strategy, and see my decisions shape the product and the business.
Core strengths: SaaS platform architecture, database design & optimization, full-stack development (C#/.NET, SQL Server, JavaScript), data pipeline & integration design, cloud infrastructure (Azure), engineering team leadership, post-acquisition technical integration.
Right now I’m looking for a Head of Engineering or VP of Engineering role at a startup or small company — ideally in health-tech or data SaaS — where I can manage engineers, own architecture, contribute to product direction, and work in an environment where ideas have direct impact.
WHAT I WRITE ABOUT HERE
This blog is where I think out loud about the things I’m working through – engineering leadership at small companies, the craft of building SaaS platforms from scratch, integrating AI and LLMs into real products, and the lessons (good and painful) from building, selling, and integrating a company. If you’re a founder, early engineer, or someone thinking about what it actually looks like to own the technical side of a startup, some of this might resonate.
Based in South Florida. Open to remote or hybrid roles.
Connect on LinkedIn (linkedin.com/in/mcmullenjim).
Try Fail Learn Grow 
That’s almost exactly my story… and this is the blog I’ve been thinking I should write – also because writing something I’ve learned down helps make sure I actually understand the whole concept.
When I tell my friends what I’ve learned though, I get blank looks, as in ‘That’s nice dear… but I really have no idea what you’re rabbiting on about.’ My mum is fantastic, she just listens and nods her head.
It’s great to see someone else who started out like I did!