Bartosz Osiej

19 · Poland · Rust, eBPF, compilers. Built a programming language (192 tests, PyPI), eBPF ransomware tracker, 4 security tools. Everything ships, nothing rots. Open to first paid role.

Joined on Aug 21, 2026

Bartosz Osiej

Sep 15

Building a Solana-like validator in Rust: what PoH, Tower BFT and Sealevel actually force you to think about

#rust #blockchain #consensus #systems

3 min read

Bartosz Osiej

Sep 15

eBPF verifier limits are a design constraint: what CO-RE field offsets and bounded loops taught me

#ebpf #rust #kernel #linux

3 min read

Bartosz Osiej

Sep 15

Catching ransomware with eBPF: what execve/openat tracing taught me about false positives

#ebpf #rust #linux #security

2 min read

Bartosz Osiej

Sep 15

A web OS that 'never booted': the two bugs that looked like kernel failures but were 404s and z-index

#web #typescript #debugging #deploy

2 min read

Bartosz Osiej

Sep 15

I made my portfolio readable to AI crawlers: llms.txt, JSON-LD and a 40-method distribution stack

#seo #ai #llms #automation

3 min read

Bartosz Osiej

Sep 5

I built a Linux Security Module that lives in-tree and boots from upstream

#security #linux #kernel #c

3 min read

Bartosz Osiej

Aug 26

I built an eBPF ransomware detector in Rust

#rust #ebpf #linux #security

4 min read

Bartosz Osiej

Aug 26

I built a programming language that compiles to Python, Bash, and binary

#programming #python #rust #compilers

3 min read

DEV Community

Bartosz Osiej

Badges

Writing Debut

Building a Solana-like validator in Rust: what PoH, Tower BFT and Sealevel actually force you to think about

eBPF verifier limits are a design constraint: what CO-RE field offsets and bounded loops taught me

Catching ransomware with eBPF: what execve/openat tracing taught me about false positives

A web OS that 'never booted': the two bugs that looked like kernel failures but were 404s and z-index

I made my portfolio readable to AI crawlers: llms.txt, JSON-LD and a 40-method distribution stack

I built a Linux Security Module that lives in-tree and boots from upstream

I built an eBPF ransomware detector in Rust

I built a programming language that compiles to Python, Bash, and binary