Software Engineer – User Interface

Job Title
Software Engineer – User Interface
Job ID
New York,  NY 10017
Other Location

Software Engineer – User Interface 


Cloud9 Technologies is a voice communication and analytics platform for institutional traders.  We leverage cloud services including AWS, a wide array of web services, WebRTC, as well as advanced deep learning techniques to empower firms with the benefit of modern communication tools and enhance trader workflow with actionable voice data & analytics.    

Our company was started in 2014 by a team of motivated entrepreneurs and highly successful industry veterans that have started several businesses and taken multiple companies through public offerings.  We are well funded, with investors including J.P. Morgan, Barclays, NEX, and Point72 Asset Management. Cloud9 has been profiled in publications such as the Wall Street Journal, Forbes, and Waters Technology.  Our award-winning technology was a named the 2017 Best Sell-Side Trading Communication System by Waters Technology for the second year in a row, recognized in the Top 10 innovative solutions of the year by the Futures and Options Industry Association, named to the CB Insights Fintech 250, and the FinTech Global RegTech 100.

By bringing together an experienced group of engineers, product managers, and industry experts, Cloud9 developed a communications platform for the trading floor of the future – offering more functionality and analytic insight than legacy hardware at a fraction of the cost.  We’re a group of pioneers who enjoy solving challenges and building disruptive technology – and we’re looking to hire the best and brightest.

Join our team to contribute to the development of the most secure, compliant, and reliable communications platform in the financial services industry.



Working as part of a highly skilled delivery-oriented development team, you will be responsible for the design and development of all of our Client Side software. We build complex, concurrent, always-on apps and manage the whole process, and we’d like you to jump right in.


  • Design and develop a highly-reliable Windows desktop application
  • Architect voice communications platform for call processing, recording, and metadata for advanced data analytics
  • Integrate third party SDKs and hardware peripherals


Required Skills and Experience:

  • 5+ years of experience in software development
  • Strong knowledge of WPF/C# fundamentals, using MVVM and DI Containers
  • Low-latency, non-blocking Concurrency in .NET Framework 4.5
  • Messaging over different transports such as REST, Socket.IO
  • Working knowledge of Agile methodologies, scrum, TDD

Not required but huge pluses

  • HTML5
  • Javascript, a framework like AngularJS,  ReactJS, Electron
  • WebRTC, VoIP, SIP, and Telephony
  • Amazon AWS, Linux, UNIX technologies


Bachelor’s Degree in Computer Science or Electrical Engineering is required, Master’s preferred.


Cloud9 Technologies LLC values diversity of culture and thought and seeks talented, qualified employees in all its locations around the world regardless of race, gender, national origin, religion, sexual orientation, disability, age or any other protected classification under country or national law.