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Markos Zoulias Charatzas

PROFILE

Markos Zoulias Charatzas

Worked on the govuk-one-login/mobile-ios-one-login-app, delivering features and improvements focused on user experience, QA reliability, and CI/CD efficiency. Developed an app integrity error screen with analytics integration using Swift, enhancing observability and user guidance during integrity issues. Improved UI consistency by updating reference screenshot standards and stabilized the Settings UI by addressing cell reuse bugs. Hardened CI/CD pipelines against script injection and optimized test orchestration with GitHub Actions and Fastlane, consolidating quality gates and reducing test runtimes. Collaborated across QA and DevOps to streamline release processes, resulting in faster feedback loops, lower maintenance overhead, and improved release readiness.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

7Total
Bugs
2
Commits
7
Features
3
Lines of code
662
Activity Months3

Work History

April 2026

1 Commits • 1 Features

Apr 1, 2026

Concise monthly performance summary for 2026-04 focusing on govuk-one-login/mobile-ios-one-login-app. Key feature delivered: CI/CD Testing Pipeline Optimization that reuses a build artifact for unit and snapshot tests in a single build phase, and updates to quality gates to consolidate testing into one CI/CD job. Impact includes faster feedback, reduced test runtime and maintenance overhead, and a simpler, more reliable pipeline. No major bugs fixed documented this month. Technologies demonstrated include CI/CD pipeline design, build artifact management, test orchestration, and cross-functional collaboration with QA and DevOps.

March 2026

4 Commits • 1 Features

Mar 1, 2026

March 2026: Focused on stabilizing the Settings UI, hardening CI/CD security, and improving UI test reliability for govuk-one-login/mobile-ios-one-login-app. Key outcomes include a robust Settings TabbedTableViewCell reuse fix, security improvements to the CI/CD pipeline, and a more deterministic, faster, and more reliable UI test suite that catches UI regressions earlier in PRs. These efforts reduce UI defects, accelerate PR validation, and lower release risk, delivering better user trust and faster time-to-market.

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 — govuk-one-login/mobile-ios-one-login-app: Delivered two focused improvements targeting user experience and QA consistency, with measurable business value. Key features delivered: - App Integrity Error Screen: Introduced a dedicated screen to inform users during integrity issues, with analytics tracking to measure usage and failure modes (commit 114baab1be83039a94edfbea9ac2edce5b2a0a2f; DCMAW-18052). Major bugs fixed: - Reference Screenshot Standards Update: Updated reference screenshots to include the text 'app' after the app name to ensure consistency and clarity (commit 9e028b8361b7da4276359954650ad5536102b8cc; #705). Overall impact and accomplishments: - Improved user experience during integrity issues, with added observability via analytics. - Enhanced QA reliability and release confidence through standardized reference screenshots. - Clear alignment with product requirements and measurable business value (reduced ambiguity in UI references, better data for issue monitoring). Technologies/skills demonstrated: - UI/UX considerations for error handling in a mobile iOS app. - Analytics integration for feature visibility and issue diagnosis. - QA/process discipline through screenshot standardization and reference management.

Activity

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Quality Metrics

Correctness88.6%
Maintainability85.8%
Architecture85.8%
Performance85.8%
AI Usage25.8%

Skills & Technologies

Programming Languages

NoneSwiftYAML

Technical Skills

Analytics IntegrationCI/CDContinuous IntegrationDevOpsFastlaneGitHub ActionsGraphic DesignSecurity Best PracticesSwiftTestingUI DesignUI TestingUI/UX DesignUnit TestingXCTest

Repositories Contributed To

1 repo

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

govuk-one-login/mobile-ios-one-login-app

Feb 2026 Apr 2026
3 Months active

Languages Used

NoneSwiftYAML

Technical Skills

Analytics IntegrationGraphic DesignSwiftUI/UX DesignUnit TestingiOS Development