Founded in 1985, Nexus Software Systems is a United States based software development company and provider of custom software development services. We started by developing device drivers in Assembly language and system software in C and in C++. Since then, we have successfully delivered more than 10,000 applications and have helped thousands of companies improve their business performance, avoid losing customers and quickly win new customers.

Software to us is a craft that we care deeply about. Which enables us to produce code that is highly functional, efficient and correct.

With over 38 years of software development experience, we have expertise in creating software that works well. This includes applications for eCommerce, Data Analytics, Customer Relationship Management (CRM), and Process Management. We create software for Big Data, the Internet of Things and Computer Vision. As well as applications in fields such as Artificial Intelligence and Machine Learning.

Creating effective, efficient software to help you better manage your business.

Empowering you with the ability to run your business more effectively. Giving you the freedom to stay connected to what's most important to you. That's what motivates and inspires us every day.

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Our Philosophy

Helping you realize your full potential is our mission.

Your involvement in the software development process is important to us.
You will receive regular updates. You will be encouraged to provide feedback on these. And to speak with your programmers, as your application is being developed.

This enables you to influence the design of your system. And lets you check that we're on target to deliver the application that you're expecting.

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Software Development Company Philosophy

Why Choose Nexus Software Systems

Founded in 1985, Nexus Software Systems is a US based provider of custom software development.
For more than 38 years Nexus Software Systems has been providing custom software solutions to companies in Banking, Travel, Real Estate, Healthcare, Retail, Telecom and other industries. Amazon, eBay, Microsoft along with other industry leaders benefit from our solutions in their daily operations.
To enable people and businesses to realize their full potential.
Successful Projects Delivered

Successful Projects Delivered

Happy Clients

Happy Clients

Years of Experience

Years of Experience


What our clients say
software development clients
software development client, Brian Patterson

Nexus Software Systems was a perfect choice for our custom Volusion website. We needed an online catalog for our extensive rental equipment, which wasn’t available from other Volusion vendors. Nexus Software created our online presence and provided us with direction on basic edits for additions and maintenance. They have also been a solid support resource for changes and problem solving, which we continue to utilize to this day.

Brian Patterson

Marketing Manager, AMP-Cherokee

software development client, Cathy Meyer

Nexus Software Systems is THE most competent & accessible/responsive developers I've come across in a decade. They come up with solutions that will SAVE your company so much in output costs that simply consulting with them is value all on its own. They work diligently to make sure you stay operational & have VAST knowledge of all the newest tech. PLUS they help maintain legacy code where needed. Hire Them!

Cathy Meyer

Director of Support & Services at HotComm

software development client, Kathryn Townsend

I spoke with many software development companies prior to choosing Nexus. Everything that I was promised was delivered completely and within a short period of time. Our new website is not only exactly what we wanted, it will last us for years. The developers at Nexus Software Systems are extremely helpful, very knowledgeable and patient!

Kathryn Townsend

President Greater Portland Board of Realtors, REALTOR of the Year.

software development client, Marty Karasick

Nexus has been servicing our site for more than 7 years. During that time, we have been completely satisfied with the attention they provide to small accounts as well as their fees and timeliness. We would recommend them to anyone.

Marty Karasick

Cast In Stone

software development client, Sarah Walters

We have enjoyed working with you over the course of the past five years, you have been an integral part of our growth.

Sarah Walters

Manager, World Travel Holdings

software development client, Melissa Lee

You provided us with an amazing solution. Our ecommerce system performs better than we could have imagined. The technical capabilities of the developers at Nexus Software is absolutely astounding. We are very happy with your work.

Melissa Lee


Recognition and Awards

Top Rated Software Development Companies
Top Software Development Agency
Top Software Developers in Maine
Top Web Design Ecommerce Company in Maine
Top Web Developers in Maine
Intel Cloud Developers