Nice you are trying Online approach to get your Partner/Co-founder/Startup mate and below can be the platform for this :
But when you are early stage and expecting someone to work with you i'm assuming you are expecting Partner/Co-founder/Startup mate for that you have evaluate a person very carefully and my suggestion is hangout in some meetups (if you are having time) else evaluate in your connection.
Why i'm little rude or strict on this ?
The reason behind being little strict is you are building your core team and this is the only right time to build a right team. Why a team, Going forward if you are approaching for funding 70% of the investor funds or believe in team (Stats provided by Silicon valley team).
Having a good a idea is nice but having a good team is "Wow".
By Nicolaj Højer Nielsen (Serial Entrepreneur, Investor & Author) team always play key role and your co-founders are your first investor.
Even i have found and seen personally if you add your team member in 2 Slide or 2nd Page 50% percent things sorted and also this helps you to show case how much you believe in your team which helps your audience to connect with more. And also co-founder should also have same or more enthusiasm because you guys are going to build next venture from scratch and also person should have ballin his pants because he is gong to spend time in same room or cabin or desk more than time he will spend with his family or wife.
Lars Buch (In-charge of Starup Bootstrap Camp) says that "Normally i would not invest in a singe founder company Bkz being single Co-founder means only 3 things : 1. It's too early to invest 2. The Founder underestimates what's exactly need to be build 3. The Founder is simply asshole."
So still i feel you should meet him in person or please try to find out some one in you connection or ask some in Meetups (1. /www.meetup.com 2. 4startups.in ) to introduce such mate.
Expecting some response from Syed Fazle Rahman and Team because he is also having fresh and very good early stage experience.