• Linear Algebra Software Engineer


    Numerical computations are usually based on a set of standard libraries which implement the most common operations. These libraries are different for dense matrices (BLAS, LAPACK, ScaLAPACK, ...) and for sparse matrices (SparseBLAS, ...). Moreover, there are vendor implementations such as ACML, ATLAS, cuBLAS, etc which are adjusted to platform features. 

    A good BLAS implementation can improve the performance of many other libraries and platforms. A BLAS library is also the main back-end in deep learning frameworks which have been solving many interesting problems in recent years? from automated grocery store purchases to autonomous cars. Codeplay Software is actively working on setting the foundations of Linear Algebra libraries for SYCL (SYCL-BLAS) by creating and/or porting various implementations. We make heavy use of advanced C++ features to optimise code for all kinds of accelerators, from GPUs to DSPs, to maximise performance and reduce energy consumption.

    The main focus of this position is to measure and improve the performance of the SYCL-BLAS implementation, by contributing to the benchmark codes and adding missing features, such as other variants of GEMM operations or new hardware features such as sub-groups or other vendor-specific hardware features. The position can be tailored to the experience and interest of the intern, tackling different aspects of the library performance or new hardware features. There could be opportunities for publications in the topic.

    The position is permanent and is based at our head office in central Edinburgh.  

    Salary range: Competitive & Negotiable. 

    What We Offer

    Codeplay is internationally recognized as being at the forefront of software development technology. Working at Codeplay offers unique opportunities and challenges to learn new technologies and to get involved in shaping the software industry. Codeplay's projects range from: creating tools and tool sets (optimizing compilers, debuggers, profilers, programming models & APIs, test systems/suites, etc.) for brand-new unannounced next-generation hardware; developing and optimizing current machine learning (TensorFlow™) and computer vision applications; research and development into lowering the power consumption of mobile devices; and contributing to new programming models and software standards (e.g. C++, SYCL™OpenCL™Vulkan® and SPIR™-V).

    Codeplay is an active contributor in the community for the ClangLLVM and LLDB open-source compiler and debugger projects. Our engineers are also leading the effort to bring support for machine learning with TensorFlow to OpenCL-enabled devices, by adding support for SYCL (the C++ high-level programming model built on OpenCL) to the open-source codebase. We are building an ecosystem around the SYCL standard, including public projects for computer vision, linear algebra, and C++ parallel programming APIs - see https://github.com/codeplaysoftware. If you are excited about contributing to programming tools that will be used by developers worldwide, please get in touch!

    • Work on exciting brand-new technologies and standards with globally recognized customers.
    • Help to shape the future of the industry by contributing to open-source software, standardization efforts and Codeplay's products.
    • A friendly and relaxed working environment where colleagues respect and support each other. You will be working in a diverse team of creative and talented engineers from around the world.
    • Learn from experienced colleagues: our staff frequently give company-wide knowledge-sharing presentations on new software and technology trends, personal projects and other relevant subjects.
    • Work with modern code bases, with the freedom to choose platforms and tools to get the job done.
    • Great career prospects within a growing company
    • Positions are available at various levels, from the entry-level Software Engineer grade to Senior Principal Software Engineer, depending on your skills and experience.
    • We develop our engineers to progress quickly in their roles, and to take ownership of code, become technical experts, and/or lead teams. We provide training in skills such as project and people management, networking and delivering effective presentations.
    • Opportunities to get involved in Codeplay's very active research, enabling you to make an impact on the company's technology and future direction, and establish your industrial research track record by contributing to papers and publications.
    • Frequent opportunities to attend major worldwide industry conferences and developer meetings, represent the company, and become a recognized expert.
    • Codeplay has been recognized as an excellent employer and has attained a Silver Level Accreditation with Investors In People.
    • Flexible working hours, stock options and pension scheme.
    • Private healthcare insurance.
    • Frequent company social events (social nights, pot luck lunches, gaming, karting, outdoor adventures, and more).

    What you Would Be Working On

    The candidate will be mainly involved (but not limited to) in:

    • Adding various feature tests for the implemented SYCL-BLAS operations on the existing SYCL-BLAS test case framework.
    • Adding SYCL-BLAS example to demonstrate how-to-tutorial on SYCL-BLAS operations.
    • Adding per-SYCL-BLAS-operation benchmark to the existing SYCL-BLAS benchmark framework and comparing the result with the existing BLAS subroutine (e.g. clBLast, intel MKL, etc).
    • Contributing on completing the remaining SYCL-BLAS features.
    • Adding usage of new hardware features into the library

    Candidate Skills - Must Have

    • Understanding of C++ programming, in particular modern C++ and template metaprograming.
    • Understanding of Software Engineering and optimization, with a focus on GPU and other accelerators
    • Knowledge of the underlying mathematical concepts involved in the BLAS operations
    • Knowledge of testing suits, like Google Test

    Candidate Skills - Any of the following would be beneficial

    Knowledge and/or experience of any of the following would be useful for the role, but are not essential. You must be able to learn new skills, but will be given support from Codeplay's team to get you up to speed.

    • Experience with writing technical documents (research papers, documentation, etc. )
    • Understanding of BLAS/LaPACK
    • Understanding of Eigen framework
    • Understanding of CuBLAS
    • Understanding of HPC knowledge
    • Understanding of GPU optimisations and programming
    • Understanding knowledge of SYCL/OpenACC/C++AMP/OpenMP Programming

    Application Guidance

    Any application which results in a job offer is conditional upon the candidate already having or successfully applying for the right to work in the UK. Codeplay is proud to be an Equal Opportunities employer. We celebrate and value diversity. We are committed to creating an inclusive environment for all employees, regardless of race, colour, gender, religion, national origin, ancestry, citizenship, disability, age, sexual orientation or any other characteristic protected by law. All employment is decided on the basis of qualifications, merit and business need and we strongly encourage applicants from all backgrounds and walks of life.


    You should be studying towards a degree in a relevant subject; however, if you can prove skills and knowledge through portfolio work, projects or previous employment, then a degree is not essential.

    In order to progress your application we require all candidates to provide the following: CV, Cover Letter & C++ Code Samples (where relevant). Our system will only accept links to personal projects/GitHub accounts or PDF documents. 

    Submit an Application

    Please fill in the forms below to the best of your ability. Don't forget to add any relevant links to GitLab, BitBucket etc! Personal projects are a big win for your application.

    If you want to apply for multiple positions with this application, please select the relevant positions from below.
    • Linear Algebra Software Engineer
    • Compiler Engineer
    • Runtime Engineer
    • AI Parallelisation Engineer
    • Developer Relations Engineer

  • Status

    Open for Applications

    Position Type

    Permanent Positions