Demand the
C# Experts that Develop for Pepsi, AIG, and the F100.
Founded in 2002, we’re headquartered in NYC and supported by a global team committed to building software of lasting value.
Pepsico
data visibility for every store and every product
Challenge
PepsiCo's initial efforts led to the creation of a prototype dashboard using Power BI. However, this prototype lacked the sophistication and flexibility required to meet PepsiCo's complex needs.
DOOR3 Solution
DOOR3 delivered a tool that revolutionizes how PepsiCo interprets data. The DOOR3 project team delivered a solution that not only met PepsiCo's immediate needs but also set a foundation for future expansions and external collaborations.
60th anniversary GDUSA
Graphic Design Annual Showcase
Leon Market
driving hypermarket growth with a best-in-class delivery app
Challenge
With both English and Arabic spoken in Saudi Arabia, one of the biggest challenges with this mobile experience was designing an application that is as intuitive left-to-right as it is right-to-left. DOOR3 aimed to create a beautiful user experience in both languages, with flawless transitions in-between.
DOOR3 Solution
A cutting-edge e-commerce platform with strong, cohesive brand identity for a Saudi Arabian audience.
Winner health and wellness category
American Digital Design Awards
2022 GDUSA
Dr. Treat
from Concept to MVP launch
Challenge
Dr. Treat came to DOOR3 with only an idea, seeking to establish a requirements list for an MVP, solidify their user flows, and generate compelling designs.
DOOR3 Solution
It took less than 6 months our team to transform Dr. Treat’s concept into a complete MVP. DOOR3 packaged 24/7 in-app urgent care contact, scheduling, document storage, and billing management into an app that is intuitive and incredibly effective for veterinarians, pet caretakers and their pets.
A Leader in C# Development
Since 2002, DOOR3 has specialized in delivering high-performance, scalable, and secure C# solutions that drive business success. Our team has extensive experience with C#, the main language of all .NET Microsoft Windows applications, enabling us to build powerful applications that scale with your business.
We’ve been doing this a long time, since before .NET’s release. Our clients, including law-tech leader TSG, benefit from our peerless capacity to de-risk projects and tailor our solutions to align with your business goals to foster long-term success. We proudly serve the financial services, insurance, legal, healthcare, non-profit & education, construction & contracting, and retail industries.
Why DOOR3 for C# ?
Versatile Solutions
DOOR3 leverages C#’s full potential to build a range of complex applications, from desktop to mobile. We pair C# with .NET Core for cross-platform development tailored to your business needs.
Robust Security
With C# and the .NET framework, we implement strong security features like data encryption and secure APIs, ensuring your applications are protected from threats and your data is secure.
Scalable Performance
We've mastered C#'s optimization principles to ensure performance keeps up with your business, whether you're in the F100 or just starting up.
Rapid Development
Our mastery of the Visual Studio IDE and C#'s features allows us to prototype and deploy applications quickly, without sacrificing quality, enabling you to bring solutions to market faster.
Why DOOR3?
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Developing since dial-up
We’ve been developing software longer than most of our competitors have existed. Founded in 2002, before your phone was smart, DOOR3 is supported by a global team of talented professionals building software of lasting value.
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On-time and on-budget
Delivering excellence — reliably. Large companies and small non-profits turn to DOOR3 for the same reason: value.
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Enjoy the journey
We bring empathy, collaboration, and shared purpose to all of our projects.
“They know design, they know technology, and most importantly, they stick around until they get it done. I would recommend DOOR3 to anyone who needs reliable Web design and mission-critical, robust software development.”
Patrick McGill, Director, Online Production CSTV/CBS Online, Inc
+30
reviews on Clutch
“The process was fun, and it was energizing to work with DOOR3.”
Alexis Lellios UX Manager, SaaS Company
“They had a great team, and we have nothing but praise for them.”
Debbie Penko Chief Product Officer, RISA Tech
“DOOR3 was able to put everything together and help us achieve what we wanted.”
Andrés Santos Senior Software Engineer, Retrievr Inc
A Leader In #C