# Ilia Zavidnyi

> Research engineer in Prague working on LLM post-training, coding agents, and evaluation at JetBrains Research, and robot learning at CIIRC, CTU Prague.

## Profile

- [Website](https://zavidnyi.com/): Professional profile and current research interests.
- [Experience](https://zavidnyi.com/#experience): Research engineering and earlier software engineering at JetBrains, and VLA research at CIIRC.
- [CV](https://zavidnyi.com/resume.pdf): Downloadable public CV.
- [Contact](https://zavidnyi.com/#contact): Research engineering roles and collaborations; email ilia@zavidnyi.com.

## Research and code

- [Step Rejection Fine-Tuning: A Practical Distillation Recipe](https://icml.cc/virtual/2026/82767): Published at the ICML 2026 DL4Code workshop.
- [SRFT paper](https://arxiv.org/abs/2605.10674): Method and evaluation details.
- [Robotic manipulation code](https://github.com/zavidnyi/simple-test-time-scaling-vla): Test-time action sampling, filtering, and averaging for vision-language-action policies.
- [Mellum](https://huggingface.co/JetBrains/Mellum-4b-base): JetBrains' code-completion model; Ilia contributed fine-tuning and evaluation.

## Professional profiles

- [GitHub](https://github.com/zavidnyi): Public repositories.
- [LinkedIn](https://www.linkedin.com/in/zavidnyi/): Professional profile.
- [Google Scholar](https://scholar.google.com/citations?user=Rm3SOFAAAAAJ): Research publications.