Denis Stepulenok

Process audio and video with FFmpeg, ffprobe, Python, and uv.

Run Rust tests, coverage, mutation tests, code and license checks, and cached builds in CI.

Test web pages with Python, Chromium, Google Chrome, axe, and Lighthouse.

Build C++ and CUDA programs with the NVIDIA CUDA development toolkit.

Build Graphify knowledge graphs of code and documents, then query them from the CLI or MCP.

Build LaTeX documents and check C++ code with coverage and memory tools.

Index code into a CodeGraph SQLite graph and query symbols, callers, and impact from the CLI or MCP.

Create PDF files with Typst and LibreOffice, and inspect them with Poppler tools.

Compile Hello, world! examples in seven languages and check PDF output with two LaTeX engines.

Run Open WebUI, a self-hosted chat interface for Ollama and OpenAI-compatible APIs.

Test PHP projects in CI with PHP CLI, Composer, PHPUnit, pcov code coverage, and common extensions.

Build and test Android apps in CI with JDK 25, the Android SDK, and Gradle.

Build and test Rust desktop applications that use GTK 3 and X11.

Install and use Crossplane on Kubernetes and EKS: the crossplane CLI, kubectl, helm, and AWS CLI.

Store relational data, vectors, and graphs in PostgreSQL 18 with pgvector and Apache AGE.

Run Argo CD on Kubernetes and EKS for GitOps, and use the argocd, helm, and kustomize CLIs.

Run a Spring Boot REST API with Java 25 LTS, OpenAPI, and Kubernetes examples.

Run Java browser tests with JDK 27, Gradle, and Google Chrome.

Build C++ Vulkan programs and compile shaders for tests without a physical GPU.

Learn Docker networking with a Python website check and a MySQL query.

Run gitleaks, hadolint, shellcheck, actionlint, typos, semgrep, and trivy from one image.

Test and check Python code with uv, pytest, Behave, Ruff, and mypy.

Build C++ programs and check test coverage and memory use.

Build and test projects that use Rust and Node.js.

Generate Allure 3 and Allure 2 reports in CI from pytest, Java, Behave, and Playwright results.

Build, test, format, and lint Rust projects.

Run Java Swing applications and tests with JDK 25 LTS and a virtual display.

Build and test Java projects with JDK 25 LTS and Maven 3.