The Auckland-based company had bought Desaign, an animation and motion graphics company, which it hoped would expand its service portfolio, Optimizer chief executive Manas Kumar said.
He said he was excited about what the acquisition meant for both companies.
"Desaign's skills and ability to turn complex concepts into simple communication is what attracted us in the first instance.
Optimizer HQ is all about simplifying technology and so Desaign is a good fit."
The acquisition would expand the service portfolio and help small businesses around the world simplify business communication through the work of the Desaign division, he said.
After listing on the Frankfurt Stock Exchange a few months ago, it was important to maintain the momentum of the business, Mr Kumar said.
"With the company now public, we felt there were a lot of expectations we had to meet and this purchase is a step in the right direction. Acquisitions have always been an important part of our growth strategy and we have a few others on our radar."
About 10 years ago, Manas Kumar came to New Zealand to play cricket professionally, but soon found himself sleeping in bus stops between his many jobs.
But after years of hard work, at the end of last year he successfully listed his small technology company, Optimizer HQ, on the German stock exchange.
Before he came to New Zealand from Kolkata, Mr Kumar played professionally in South Africa and India and in 2001 he decided to move to New Zealand to further his career.
However, Mr Kumar struggled to balance training commitments while supporting himself and gave up his dreams of becoming a professional cricketer.
He took on a string of jobs - from the graveyard shift at McDonald's in Wairau Park, Auckland, to pumping petrol at a Caltex station, to making sandwiches at Subway, he told The New Zealand Herald.
And for six months, Mr Kumar would spend one night a week sleeping in a bus stop in downtown Auckland between a late-night shift and an early start at another job.
"I'd finish my job at 1am at night ... and I was living in Westmere at the time so public transport at that time just wasn't going to work and I couldn't walk home and I had to be back in town the next morning for another shift. So for six months I used to crash ... there," he told the Herald.
Then towards the end of 2003, Mr Kumar decided he had had enough.
"I thought 'That's it, I've had enough. There's got to be something better out there'."
He had always had a fascination with computers and had a feeling the internet was going to be huge. With his maths major knowledge and a spare $10 he bought a domain name.
In a tiny office space in St Lukes, he began to build his web design company - going through the Yellow Pages and calling businesses to pitch his ideas about a website for their company.
The work started snowballing as word-of-mouth spread and four years ago he made the considered decision to switch from web design to software development.
Optimizer HQ - which specialised in business email software - now employs 11 people in its Anzac Ave office and has international clients, including Harvard University, Burger King, Pfizer and Footlocker, and local customers such as the New Zealand Police and New Zealand Post.
"Just last year we were delivering about 300,000 emails per month, which I was really happy with. Now we're sending more than 400 million emails and expect to hit the one billion mark by next June."
And at the end of last year, he listed his company on the home of the euro, the Deutsche Boerse - the Frankfurt Stock Exchange.
And at 31, Mr Kumar is the second-youngest chief executive in the world to be listed on the Deutsche Boerse, behind Puma's Jochen Zeitz.
Every now and then, he had to pinch himself to remind him it was real, he said.
"Every time I have friends or relatives visiting me, I take them to all those spots where I've had the lower points in my life - the bus stop opposite McDonald's in Wairau, the steps at Britomart. I take them there because, besides the fact that it helps me share my life with my family, it also keeps me in check, to know where I've come from and to make sure that I don't let the short-term success get into my head because it's a long way to go.
"As far as I'm concerned, the exodus has only just happened from the desert. The journey to the promised land has only just begun."
