Kacper Kuczkowski

Software Engineering Consultant

I help businesses design, build, and ship scalable web applications, from greenfield projects to complex integrations. Nine years of delivery across IoT platforms, security tooling, and digital media.

Open Source

Projects
Contributor
Harper

An open-source grammar checker written in Rust, designed to run entirely on-device via WASM. Integrates as a browser extension, LSP server, and plugins for editors like Obsidian and WordPress.

RustTypeScriptWASMPerformance
Contributor
PTK

Penetration Testing Kit, an OWASP browser-based security toolkit for dynamic application security testing. It automates vulnerability scanning, page crawling, and findings export directly from the browser.

OWASPAutomationVuln Scanning
Featured Initiative
PTK Agent API

OWASP PTK offers browser security scanning, but its automation API wasn't built for AI agents. Building a high-level workflow layer that gives models a consistent interface to drive scans, poll status, and retrieve findings without managing internal state.
Recent Pull Requests

Background

Experience
2026 - Present
Software Engineering Consultant
Independent
Available for high-impact remote engineering roles and B2B contracts
2022 - 2026
Senior → Staff Software Engineer
Kigen
Helped design and build a greenfield eSIM provisioning platform; cut new operation dev effort by ~50% with a single-interface extension model
JavaSpringMongoDBPostgreSQLDockerKubernetes
2019 - 2022
Software Engineer
Unosquare · Harvard Business Review
Led the technical turnaround of an at-risk podcast platform redesign, relaunching on time and within budget
JavaSpringPythonTypeScriptReactPostgreSQLDockerAWS
2017 - 2019
Software Engineer
Rapid7
Replaced legacy OS fingerprinting with XML-driven rules, cutting detection time by ~60% and shifting releases from weekly to daily
JavaSpringPythonRubyPerlJessPostgreSQL
View full experience on LinkedIn →

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