Sebastian Stock

Durban, KwaZulu-Natal, South Africa

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Summary

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Rockstar

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Top School

Sebastian Stock is a marketing and category management specialist with seven years of hands-on experience helping FMCG brands translate strategy into retail shelf success across South Africa. He combines classical marketing and space-planning expertise with strong data-analysis skills to monitor sales off-take, competitive activity, and inform new product development. Sebastian has collaborated with international brands and leading ad agencies to design and execute end-to-end campaigns, and he is now building an outsourced marketing service focused on market analysis and category leadership. Unusually for a marketer, he also contributes to open-source scientific computing projects—improving numerical and unit-handling libraries in the Julia ecosystem—bringing analytical rigor to commercial decisions. Based in Durban, he holds a Master of Business Leadership from UNISA and thrives on creative, implementation-focused projects that bridge insight and shelf-level execution.

7 years of coding experience

BA, BA at Vassar College

Master of Business Leadership (MBL), Master of Business Leadership (MBL) at University of South Africa (UNISA)

Afrikaans, French

Github Skills (16)

numerics10

units-of-measurement10

computation10

numerical10

numeric10

linear-algebra10

julia10

computer-engineering9

rational-numbers9

language-design8

programming-language8

documentation8

modeling7

testing7

mathematical7

Programming languages (3)

JuliaC++Perl

Github contributions (5)

PainterQubits/Unitful.jl

Aug 2018 - Jan 2023

Physical quantities with arbitrary units

Role in this project:

Back-end Developer

Contributions:124 reviews, 52 commits, 196 PRs in 4 years 5 months

Contributions summary:Sebastian primarily contributed to the `unitful.jl` repository by adding and modifying code related to physical units and dimensions. Their work involved defining new units, updating constants to reflect current scientific standards, and fixing issues in the code base. They also addressed problems related to rounding and mathematical functions within the unit system. The user also improved the project's documentation.

units-of-measureunitsarbitraryphysicalphysical-quantities

JuliaLang/julia

Jul 2019 - Feb 2022

The Julia Programming Language

Role in this project:

Back-end Developer

Contributions:123 reviews, 84 commits, 81 PRs in 2 years 6 months

Contributions summary:Sebastian primarily contributed to the Julia programming language's core libraries, specifically focusing on numerical computation and linear algebra. Their commits involve fixing documentation, enhancing the `gcd`, `lcm`, and `gcdx` functions to improve extensibility for custom types, and making changes to the `LinRange` and `Period` data structures to improve their functionality, particularly regarding eltype preservation and support for non-integer operations. They also addressed issues related to rounding rational numbers, which involved both algorithmic adjustments and error handling.

sciencejulia-languagemachine-learningjulialangpetsc

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