About me

A small introduction about my self

Abdul Wahab Kotwal - Casper

Top Rated Upwork Freelancer | Full Stack Developer with 5 Years of Front End Development Experience | Founder at Sand Box

Hi, I'm Abdul a.k.a casper, I've been coding since I was 12. I aim to develop most interesting mobile and web apps for my clients.

I consider myself expert in Angular & React Native. I've been working on front end application development for past 5 years and developed apps for using Angular, React and React Native.

I've been developing web and mobile apps for last 6 years. I enjoy working with MEAN Stack and Lamp Stack.

My expertise include but not limited to

Type Script
React Native
Nodejs & Express
Ionic Framework
React Native

I have good command on Git, SVN and Mercurial as well.

Other then that, I have great command on jQuery, KineticJS, React, EmberJS, HTML5, CSS3 (scss), Firebase APIs and Wordpress.

I work on back-end using both MEAN and LAMP Stack. I'm proficient in PHP and its frameworks like Yii, Laravel and Codeigniter. I use mySQL for databases and Sphinx search API where full-text search is required.

I do DevOps too. I can setup Linux and Nodejs servers and keep them running.

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Technical Skills

I can say i’m quite good at

Front End

Angular, React, React Native


Yii, Laravel & Codeigniter


Various Front-End Development

Git / SVN

Git, SVN

Team Lead

Curious LabX, Sand Box, Fix My Phone

Project Management

Curious Labs, Sand Box, TradebanQ

Work Experience

My previous associations


Self Employed

Mobile & Web Apps Developer

I have been working on several mobile and web apps. So far, I have delivered 100+ big and small projects in year 2015



Sr. Software Engineer

Developed a b2b portal from scratch using procedural and object oriented PHP within custom framework. Also configured sphinx, database indexing for faster search engine


Game View Studios

Software Engineer

Worked on games like TPNYC, Tap-Fish for DeNA Japan on Mobage Gaming Framework.


Tradekey Pvt Ltd

Software Engineer

Worked on different parts of tradekey.com and other in-house products like importerhub.com, citybase.com and tradeshow.tradekey.com

Reviews & Testimonials

What my customers say about me

Jeff Callhan - KindCritic.com


Casper is by far the best freelancer I have ever worked with. His communication skills are excellent. He speaks better English than some native-speakers I've met.

He knows a bit over everything on top of his main skill set, which makes him very versatile and great for almost any project. On top of all that, he is extremely personable and easy to get along with.

You CANNOT go wrong with this guy, he does amazing work and is a top-tier professional. He is always available to talk and doesn't quit til the job is done, even after the project has been closed!

Chris Flavin - RapidCityExchange.com


Honestly, I have dealt with many freelancers as you can probably see on our profile. This has been the best project we have had so far. It was priced perfect for us and the work was done better and more efficient then any other freelancer. He actually fixed other freelancers mistakes the whole time! I highly recommend Casper, honesty and hard work is hard to come by sometimes!

From Upwork

Mobile Apps Development

Good and experienced freelancer. Would hire again. Thanks!.

From Upwork

Mobile Apps Development

Abdul was great. We worked with him on a few small items, but I would recommend him to others looking for a responsive, dedicated Ionic developer.

From Upwork

Mobile Apps Development

thanks for your work! might come back to you in the future when we have more clearly defined tasks.

From Upwork

Mobile Apps Development

I am very happy with the product. This freelancer has displayed great skills. I hope to work together again.

From Upwork

Mobile Apps Development

Excellent work! Great communication and fast delivery of a Phone Gap prototype.

Hector Perex Nieto - CEO Tremble Digital

ImageMagick & Image Manipulation Using PHP

For my project, I had bids for as much as 60 days. Casper not only sent a reasonable bid but he even did a working demo BEFORE being awarded the project. From there on, he tackled very complex issues like nothing. He fixed and wrote scripts like a wizard. Truly amazing. I continue to send more projects directly to Casper, I think that is the best endorsment there could be. Very happy with his work and his dedication to quality.

Philip Broder - CEO BandApp

Mobile App Builder in Java Script & PHP

Casper is a very knowledgeable PHP programmer and works hard to get to the bottom of any problems that arise. Very quick to understand the project needs. Excellent fast php/css/codeigniter programming by Casper as always.Great work from casper as usual - this man knows his PHP

From Freelancer.com

Setup E-Commerce Website in Prestashop

After several coders on here indicating they could do the job, and actually tried, they all failed and this person completed it perfectly. Was outstanding and definitely knows his trade, I would recommend this coder to everyone. Excellent service and work ethics. dont go past this person, he provides great service and great knowledge in coding websites. would recommend to all!

Ryan Lai - CEO Auction Forces

Develop a Mobile App for Waste Management Tracking

Awesome freelancer. A "PRO" in every sense of the word!! Skills are AAAAA+++++. Very good freelancer providing valuable comment, deliver in timely manner with quality.

John Sabestian - FrenchIphone.com

Setup Simple Machine Forum On Domain Hosting

I am very happy with my experience with Casper, he is very fast and very effective. He responded to my request in very short time, he made the job very seriously and very quickly. I recommeded to work with him.

Kevin Finch - RealistixConnect.com


This guy is a genius, seriously top of his class, would have no hesitation in hiring again and again, communicated very well, never got stressed at me when I really couldnt get what I wanted across, worked through it with me, patient as hell this guy.

if you want a project doing right, if you want it on time and on budget then this is the guy for you, he won't let you down, 15 out of 10 if it were possible, thanks, all your efforts and help along the way with my project are more than appreciated, keep up the good work.


What I have done in my academic career


Bachelor's Degree in Computer Science

SSUET Karachi, Pakistan

Bacherlo's Degree with majors in Programming and Large Scale Application Development

Dec, 2007

High School Certificate in Engineering

Federal Govt. College

High School with majors in Physics, Chemsitry and Maths.

Mar, 2005

Secondary School Certificate in Science

Federal Govt. School Karachi

Junior School with majors in Physics, Chemsitry and Maths

Get In Touch

Please feel free if you would like to have a chat.

Contact details

Sand Box, Mezznaine II, Park Avenue, PECHS Block 6, Karachi Pakistan

+92 321 8651457



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