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Andreas Hatziiliou

PROFILE

Andreas Hatziiliou

Andreas Hatziiliou developed and refined build systems and cryptographic tooling across the pq-code-package/mlkem-c-aarch64 and mldsa-native repositories, focusing on reliability, maintainability, and developer experience. He implemented environment-aware rebuild triggers and adaptive terminal output using Makefile and Shell scripting, ensuring reproducible builds and improved usability. Andreas enhanced error handling in C by updating random number generator APIs to return explicit status codes, enabling robust detection of cryptographic failures. He standardized CI linting error messaging and integrated ShellCheck-based linting, streamlining onboarding and accelerating issue detection. His work demonstrated depth in cross-platform build automation, CI/CD, and secure systems programming.

Overall Statistics

Feature vs Bugs

87%Features

Repository Contributions

21Total
Bugs
2
Commits
21
Features
13
Lines of code
3,934
Activity Months5

Work History

March 2026

2 Commits • 2 Features

Mar 1, 2026

Month: 2026-03 — Focused on improving CI linting usability by standardizing error messaging across two repositories, aggregating failed checks and surfacing detailed guidance in the CI context. This accelerates triage, improves build reliability, and establishes cross-repo tooling standardization. Key deliverables include two commits implementing lint error messaging enhancements in mlkem-c-aarch64 and mldsa-native.

January 2026

7 Commits • 4 Features

Jan 1, 2026

January 2026 monthly summary highlighting key feature deliveries, bug fixes, and architectural refinements across two repositories. Focused on improving developer UX, robustness of cryptographic primitives, and test/CI reliability, with measurable business value through reduced maintenance, fewer CI failures, and clearer terminal interactions.

December 2025

8 Commits • 5 Features

Dec 1, 2025

December 2025 monthly summary: Across two pq-code-package repositories, delivered quality improvements, onboarding enhancements, and important reliability improvements for cryptographic code. The work focused on linting, documentation accuracy, and CI coverage for RNG failure scenarios, driving faster onboarding, reduced maintenance cost, and earlier detection of critical issues.

November 2025

3 Commits • 2 Features

Nov 1, 2025

November 2025 — pq-code-package/mldsa-native: Delivered targeted build-system modernization and API reliability improvements that directly impact speed, stability, and cross-platform performance. Focused on environment-aware rebuilds, feature-detection driven optimization, and robust RNG error signaling to reduce debugging time and improve runtime safety.

October 2025

1 Commits

Oct 1, 2025

Month: 2025-10 — Focus: reliability and correctness in builds for the mlkem-c-aarch64 repository. Key features delivered: bug fix implementing an Environment Variable-Aware Rebuild Trigger. Major bugs fixed: addressed issue #1150 where changes to environment variables did not trigger a rebuild. Overall impact: more reliable, reproducible builds, reduced risk of stale binaries, and faster feedback in CI. Technologies/skills demonstrated: Makefile-level build orchestration, environment variable handling, and state restoration with cached config.

Activity

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Quality Metrics

Correctness98.2%
Maintainability89.6%
Architecture91.4%
Performance87.6%
AI Usage21.8%

Skills & Technologies

Programming Languages

CMakefileMarkdownNixPythonShellYAML

Technical Skills

API developmentBuild SystemsC ProgrammingC programmingCI/CDCode lintingCode quality improvementContinuous integrationDevOpsDocumentationError HandlingError handlingLintingMakefileMakefile scripting

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

pq-code-package/mldsa-native

Nov 2025 Mar 2026
4 Months active

Languages Used

CMakefileMarkdownNixPythonShellYAML

Technical Skills

API developmentC programmingError handlingMakefile scriptingTestingbuild automation

pq-code-package/mlkem-c-aarch64

Oct 2025 Mar 2026
4 Months active

Languages Used

MakefileNixPythonShellCYAML

Technical Skills

Build SystemsMakefileCode lintingContinuous integrationDocumentationNix