Sean Purser-Haskell
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Sean Purser-Haskell

Software Developer: iOS, Android, OpenGL [ES], Computer Vision


Manchester, United States


I have worked with C++ and OpenGL for over 10 years, with 5+ years of professional experience. Lately I have been specializing in iOS, with several apps & games either currently in the app store or awaiting release, both for clients and as internal projects. I specialize in relatively low-level C/C++ development, with strong experience in areas such as: - Raster Graphics (OpenGL, OpenGL ES on iPhone, iPod Touch, iPad, Android): Order independent transparency, dynamic lighting, shadows, level of detail reduction - GPGPU: I have done algorithms work in GLSL, Cg, and OpenCL - Networking (Windows Sockets, Java): Client/server applications, web services - Streaming audio/video: DirectShow, ... morecustom embedded playback In addition, I have professional experience in the following areas: - Technical Writing - PHP/JavaScript/SQL (WAMP) - Windows API - Mac OSX - iPhone Development - x86 & MIPS Assembly less

Sean Purser-Haskell has added 12 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Aug 2012 - Nov 2012

    feature improvements to iPad OpenGL app
    75 hours
    $33.33 / hr
    $2,860.83 earned

  • Dec 2011 - Jan 2012

    iOS Image Processing App
    Sean did a great job helping us with a tight deadline. We look forward to working with him again.
    8 hours
    $66.67 / hr
    $544.70 earned

  • Aug 2011 - Oct 2011

    OpenGL ES conversion for Jigsawed
    Sean did an exemplary job completing a significant round of updates to our iPhone application, Jigsawed. He was able to keep up with a continually evolving set of tasks, and took ownership of the code as if it were a product of his own (specifically, finding & quickly fixing bugs he noticed in unrelated areas of the application, and that had existed since long before the assignment). This level of initiative improved the quality of the product beyond the mere addition of new features. When changing circumstances moved the deadline forward several weeks, he still managed to complete the assigned deliverables with no decrease in quality. His technical skill and ability to research new tech & solutions independently were all excellent. We will be hiring him again in the future for more updates.
    74 hours
    $44.44 / hr
    $3,296.11 earned

  • Feb 2010 - Aug 2010

    Mac Develper on OpenCL based Genetic Algorithm Financial Analysis System
    Sean completed some great work on an early phase of our project. I will be considering hiring Sean again for work in later stages. Closing this off now to get feedback to Sean.
    19 hours
    $27.78 / hr
    $527.82 earned

Sean Purser-Haskell has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
OpenGL Programming Test 4.25 Top 20% 16 mins
Java Test 3.90 Top 10% 20 mins
Programming with C++ Test 3.60 Top 20% 28 mins
U.S. Word Usage Test 4.00 Top 20% 11 mins
U.S. English Basic Skills Test 4.60 Top 10% 20 mins
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Work History

1,050 hours worked
16 jobs


More than 30 hrs/week

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