Denys Rybalka
Senior Consultant at TNG Technology Consulting
Dresden, Saxony, Germany
Summary
👤
Senior🎓
Top SchoolDenys Rybalka is a Senior Consultant and software engineer with nine years of experience blending research-grade physics and practical software craftsmanship, now based in Dresden. He holds a PhD in Physics and has transitioned complex scientific modeling into production-grade tools, from MPI-parallel lattice Boltzmann simulations to Kubernetes-deployed Java Spring Boot services. At TNG he led legacy modernization efforts—CI/CD migrations to GitHub Actions, AWS Kubernetes deployments—and ran functional programming workshops that reflect his taste for elegant, simple solutions. An active open-source contributor, he improved SymPy’s tensor module and documentation, bringing clarity to the Butler-Portugal algorithm and adding robust constructors for tensor symmetry. He enjoys experimenting with AI, teaching others, and hacking on projects with his dog Wuki, a detail that hints at a collegial, curious person behind the code.
9 years of coding experience
8 years of employment as a software developer
Doctor of Philosophy - PhD, Physics, Doctor of Philosophy - PhD, Physics at Arizona State UniversityMaster's degree, Physics, Master's degree, Physics at Taras Shevchenko National University of Kyiv
English, Ukrainian, German
Stackoverflow
1,841reputation
993kreached
45answers
8questions
redux
top-5%
javascript
top-5%
jestjs
top-5%
Github Skills (20)
computer-algebra10
python10
algebra10
mathematics10
math10
tensor10
documentation10
combinatorics9
javascript9
redux9
react9
jestjs9
pip6
react-router6
reactive-programming6
Programming languages (14)
Github contributions (5)
sympy/sympy
Jun 2019 - Nov 2019
A computer algebra system written in pure Python
Role in this project:
Back-end Developer
Back-end DeveloperContributions:20 commits, 10 PRs, 23 comments in 4 months
Contributions summary:Denys contributed to the `sympy/sympy` repository by improving the documentation and structure of the tensor module, specifically addressing the Butler-Portugal algorithm. Their work involved editing code and re-structuring documentation, as seen in multiple commits focused on clarifying and refining explanations within the `tensor_can.py` and `tensor/tensor.py` files. Furthermore, the user added constructors for `TensorSymmetry`, deprecating the `tensorsymmetry()` method and contributing to code refinement.
mathpythonsciencecomputer-algebra-systemalgebra
drybalka/dotfiles
Aug 2022 - Jan 2025
Contributions:156 pushes, 1 branch in 2 years 5 months
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