Hi! I’m Greg, and I build web and mobile apps.

I’m a full-stack software engineer and consultant based in Philadelphia. I love using Ruby on Rails and React Native to build beautiful products for all types of businesses.

I currently do not have any availability to take on new clients.

Chat With Me

Why You Should Hire Me

10+ Years Development Experience

I’ve been a developing software for over a decade. I strive to think critically, solve problems, write beautiful code, and craft awesome user experiences. I love starting projects from scratch, but I’ve also completely rewritten legacy software.

Design-Focused Development

My clients love how their products look and feel. I started my career in design and user experience, which has proven especially useful as a full-stack engineer. I’ve worked with dedicated design resources - but I can play that role as well.

Business Insight

Having co-founded multiple startups and participated in DreamIt (a Forbes top 10 U.S. accelerator), I’ve learned how important it is to align business needs with product value. I help clients prioritize the right things, at the right cost.

Project Management

I pride myself in being able to communicate effectively with clients to make sure projects are delivered on time, on budget, and in scope. I typically work with a select few clients at a time, so you'll always get the attention you deserve.

Featured Clients

Yards brewing company
American board of internal medicine
Giroud tree and lawn


"I can't imagine anyone else but Greg being able to re-write the software we were using to run our business as well as he did. The product he delivered has greatly improved the efficiency of our company. He was extremely responsive with communication and continues to treat us as a top priority."
Cynthia Giroud

Cindy Giroud Vice President of Marketing, Giroud Tree and Lawn

"We got quotes from larger firms for double what we paid Greg - and he delivered an app that was better than what they were proposing to build. I really appreciated Greg's professionalism, prompt communication, and attention to detail. The end product exceeded our expectations! "
Lisa Miller

Lisa Miller Senior Online Content Manager, ABIM Foundation

"Greg's ability to turn business requirements into working software is really awesome. We trust him to write reliable code that runs some of the core aspects of our brewery. He's been a pivotal resource in growing our company. I'd highly recommend working with him."
Mitch Albach

Mitch Albach Lead Brewer, Yards Brewing Company


Medium API Disabled

I once loved Medium, but it seems as though they're doing everything they can to drive their core users away. One day I'll migrate my posts to my own site.

Let's Work Together!

Greg Blass

I currently do not have any availability to take on new clients.

Chat With Me


Whether you want to discuss your project or just chat, stop in for a coffee or beer!


Northern Liberties


(215) 995-0127