We are a team of bold thinkers and enthusiastic minds. We want to build the most future proof solutions to the most relevant communication challenges facing the world today. We are masters of balance. We celebrate individuality and individual success; we also work amazingly well together as a team.

We cherish brilliance, independent thinking and creativity.

Jonathan Geller

Chief Executive Officer

Jonathan has been disassembling and wiring back electronics since he was five years old. His life is full of genius founder stories: hack into high school computer network, start computer company in high school, drop out of college to start a business. He's founded three companies since, including Telair in 2005. SIPSTACK is how he's going to revolutionize VoIP.

Stam Loizides

Chief Innovation Officer

Stam is the secret ingredient that ties the team together. It's rumoured that he has an MBA, and that he's lived and worked in ten different countries. No one really knows what he does (including himself). What we do know is that he can tackle every problem from infinite perspectives, which makes everything tremendously better.

Errol Geller

Chief Financial Officer

Errol loves taking on challenges and is very good at math. He has several decades of experience as a Senior Risk Management Executive at IBM. Errol is instrumental in getting SIPSTACK to where it is today. 

Kanasu Nagathihalli

Technical Writer

Kanasu has loved writing since her first poem, written at age six, received rave reviews from her parents. She published her poetry collection,  Beneath the Stars, when she was 21. An Ivy League alumnus of Columbia University's MFA Program, she writes marketing and technical content for a living, and fiction for pleasure. Her biggest professional challenge thus far has been to keep this bio short. She has clearly succeeded.

Ralph Rouhana

Senior Software Engineer

Pursuing a computer engineering degree from the prestigious University of Waterloo, Ralph has been building software since he was 12. There is no problem that Ralph can't solve.

Iniyan Chelladurai

Junior Software Engineer

Pursuing a computer engineering degree from the prestigious University of Waterloo, Iniyan is half human, half machine. He codes for twelve hours and then sleeps for twelve hours. On repeat. 

SIP·STER 
/ˈsipstər/ 
noun (informal) a person who challenges the status quo with creativity and independent thinking.

Driven

/to work hard but not frantically./

Team

/to care about one another's success, both at the workplace and outside./

Brilliant

/to do what excites you and change the world in the process./

Inclusive

/to do what excites you and change the world in the process./

We are always looking for incredible people to join our team. If you don't find an opening that matches your experience, we encourage you to get in touch with us

Become a SIPSTER