Kacper Kuczkowski

Software Engineering Consultant

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

Focusing open-source efforts on reliability, performance, and security. I enjoy improving the tools people use every day.

Open Source

Active Contributions
Contributor
Harper

Rust-powered grammar checker. Chrome extension internals and spell-check core: iframe linting, popup lifecycle, fuzzy-match performance.

RustTypeScriptWASMPerformance
Contributor
OWASP PenTestKit

Browser security toolkit. Fixes in the DAST scan engine, session lifecycle management, and chunk export methods for the page automation bridge.

JSSecurityDAST
Featured Initiative
PenTestKit Agent API

OWASP PenTestKit exposes powerful browser security scanning, but its low-level 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 needing to manage internal state.

View the design spec →
Recent Pull Requests

Background

Experience
2026 - Present
Software Engineering Consultant
Independent
Partnering with businesses to design, build, and maintain scalable web applications
2023 - 2026
Staff Software Engineer
Kigen
SGP.32 eSIM provisioning, modular monolith, engineering leadership
JavaSpringMongoDBPostgreSQLDockerKubernetes
2022 - 2023
Senior Software Engineer
Kigen
Server development, eSIM platform foundations
JavaMongoDBPostgreSQLDockerKubernetes
2019 - 2022
Software Engineer
Unosquare · Harvard Business Review
Full-stack engineering consultant, podcast platform redesign, regression framework
JavaSpringPythonTypeScriptReactPostgreSQLDockerAWS
2017 - 2019
Software Engineer
Rapid7
OS fingerprinting, scan engine, PCI ASV assessments
JavaSpringPythonRubyPerlJessPostgreSQL
View full experience on LinkedIn →

Let's Talk

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