Image copyright Muzmatch Image caption Shahzad Younas came up with the idea for Muzmatch while working in the banking sector

The BBC's weekly The Boss series profiles different business leaders from around the world. This week we speak to Shahzad Younas, founder and chief executive of Muslim dating website and app Muzmatch.

When Shahzad Younas took to the stage he was very nervous.

It was two years ago, and the then 32-year-old British entrepreneur was in San Francisco pitching London-based Muzmatch to a group of high profile potential investors.

He opened his address to the room by saying: "Muslims don't date, we marry."

Image copyright Muzmatch Image caption The app is now used in more than 90 countries around the world

Shahzad and his business partner Ryan Brodie were there because they had entered a global competition to win backing from prestigious Silicon Valley investment firm Y Combinator.

This US company offers financial and practical support to a number of new start-ups per year. More than 13,000 applied at the same time as Muzmatch, and it was one of 800 whose founders were invited to pitch in person.

As Shahzad continued his speech, the investors were soon bursting into laughter at how frank he was. Muzmatch was quickly given $1.75m (£1.3m), one of 100 start-ups that got backing in 2017.

Today the fast-growing company says it currently has more than one million registered users across the UK and some 90 other countries.

Rewind to 2013 and it wasn't a group of investors that Shahzad had to convince, it was himself.

Image copyright Getty Images Image caption Users of Muzmatch can choose for a parent to be able to see their conversations via the app

Back then he was working for a bank in the City of London. He enjoyed his job, but at the same time he increasingly realised that there was a gap in the market for a decent dating app aimed at Muslims who were looking for a partner from within their religious community.

"At the time there were either these really basic websites for Muslims, or big dating apps that didn't quite get our culture," says Shahzad, who was born and bred in Manchester.

"In the Muslim community a lot of us did, and still do, rely on matchmakers [to find a wife or husband]. These are 'aunties' in the community who know families, and who would match up a son with another family's daughter."

His idea for Muzmatch was that it would be a digital matchmaker app for Muslims who wanted to find someone to marry.

In 2014, Shahzad decided that he had to make a go of the app and quit his job.

Image copyright Muzmatch Image caption Business partner Ryan Brodie helped Shahzad redesign the app

"I'd wake up at 6am every morning and go to bed at about one or 2am," he says. " I was working from my bedroom at home, and it was intense. I had to learn how to build an app from scratch.

"But I knew I had to make it work. The opportunity was big enough - there are 1.8 billion Muslims around the world, and clearly no one was serving them."

Shahzad did a soft launch of the app in 2015, and his marketing methods were somewhat different to the bigger dating apps.

"I'd go to big mosques after Friday prayers and hand out cards for the app," he says. "Then I'd go to any kind of family Muslim event that I knew was on, and I would literally stick them under windscreens."

Watching a business grow on your own can be hard, and at the beginning Shahzad said he found it excruciating.

Image copyright Getty Images Image caption The app allows users to indicate how religious they are

"I remember the first couple of months I would constantly look at Google Analytics, which would show me in real time how many people were on the app," he says.

One time he says he checked, and there were just 10 people on Muzmatch.

But over time user numbers grew into thousands, thanks mainly to positive word of mouth. Soon people started telling Shahzad how they had met their wives or husbands.

"Once I heard the first success story it made it feel real," he says. "And it cemented in me that the app was going somewhere."

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Business partner Ryan, a seasoned app builder despite still being just 25 years old, came on board in 2016.

Together they completely redesigned Muzmatch, with feedback from their early customers.

They added in 22 more profile questions that people were asking for, such as how religious a person is, and how often they pray - things that really mattered to their users.

Muzmatch also allows users to opt out of having a profile photo, or to blur it instead. People can also tick a box whereby transcriptions of their in-app chats are sent to one of their parents, or to another chosen guardian.

Shahzad says that while Ryan is not a fellow Muslim, he really "gets what the app is about".

Image copyright Getty Images Image caption The company now has a second office in Bangladesh, the country with the fourth largest Muslim population

Eden Blackman, founder of dating website and app Would Like to Meet, says that Muzmatch has been at the forefront of more specialised dating apps.

"In recent years ethnic and religious dating has moved from a niche to a mainstream platform, and what Muzmatch is doing leads the pack," he says.

"If religion and online dating can be matched perfectly... it should be on hallowed ground. From what I have seen and heard about Muzmatch they seem to have broken the mould."

Muzmatch, which also has a small team in Bangladesh, operates a "freemium" business model. It is free to use its basic service, but you can pay from £10 a month for extra features such as unlimited viewing of profiles, and having your own profile seen by more people.

The company says its annual turnover is now more than £4.5m.

As the app continues to grow in popularity, Shahzad says that its potential users are the estimated 400 million single Muslims around the world.

"We've now had thousands of marriages and babies [thanks to Muzmatch]," he says. "Thinking about them every day makes me feel like all that hard work at the beginning was worth it."