mozilla/blurts-server
Oct 2025 – Mar 2026
5 Months active
Languages Used
BashJavaScriptMarkdownSQLShellTypeScriptYAMLgitignore
Technical Skills
Backend DevelopmentCI/CDCloud EmulatorsCloud Services (GCP Pub/Sub)Code CleanupConfiguration Management
Kat Schelonka
PROFILE
Kat Schelonka
Kris Schelonka contributed to the mozilla/blurts-server repository by building and refining backend systems focused on authentication, observability, and user consent management. Over five months, Kris delivered features such as end-to-end unsubscribe workflows for breach alert emails, robust authentication hardening for Firefox Account flows, and OpenTelemetry-based monitoring. Using TypeScript, Node.js, and Docker, Kris improved local development with Docker Compose, standardized logging, and enhanced CI/CD integration. The work included schema migrations, API contract updates, and security validation, resulting in more reliable data integrity, streamlined onboarding, and improved compliance. Kris’s engineering demonstrated depth in backend development and operational maintainability.
Overall Statistics
Feature vs Bugs
94%Features
Repository Contributions
44Total
Bugs
1
Commits
44
Features
16
Lines of code
7,799
Activity Months5
Your Network
375 peopleSame Organization
@mozilla.com364
Work History
March 2026
14 Commits • 2 Features
Mar 1, 2026March 2026 focused on strengthening user consent controls and breach-notification reliability in blurts-server. Delivered an end-to-end unsubscribe workflow for breach alert emails and admin communications, including UI, backend routes, templates, localization, event tracking, and tests. Renamed and clarified the unsubscribe endpoint to /unsubscribe (POST) and enhanced routing and unsubscribe analytics. Implemented new unsubscribe state and audit tables with backfill support to capture subscription changes across lists. Added breach-alert enhancement to subscribe SHA1 hashes of updated primary emails to HIBP with accompanying tests. Completed quality improvements (linting, docstrings, mocks) to improve maintainability and future velocity. Business impact: improved opt-out compliance, more accurate breach-notification targeting, and richer unsubscribe analytics enabling better customer trust and security posture.
14 Commits • 2 Features
Mar 1, 2026March 2026 focused on strengthening user consent controls and breach-notification reliability in blurts-server. Delivered an end-to-end unsubscribe workflow for breach alert emails and admin communications, including UI, backend routes, templates, localization, event tracking, and tests. Renamed and clarified the unsubscribe endpoint to /unsubscribe (POST) and enhanced routing and unsubscribe analytics. Implemented new unsubscribe state and audit tables with backfill support to capture subscription changes across lists. Added breach-alert enhancement to subscribe SHA1 hashes of updated primary emails to HIBP with accompanying tests. Completed quality improvements (linting, docstrings, mocks) to improve maintainability and future velocity. Business impact: improved opt-out compliance, more accurate breach-notification targeting, and richer unsubscribe analytics enabling better customer trust and security posture.
March 2026
February 2026
15 Commits • 3 Features
Feb 1, 2026February 2026 highlights for mozilla/blurts-server: Strengthened observability and reliability, expanded FxA-based user management and breach alert APIs, and tightened data integrity for subscriber emails, while performing targeted maintenance to boost performance and maintainability. Delivered backend instrumentation and monitoring improvements with OpenTelemetry optimization, environment/resource detection, k-anonymous metrics, and improved error tracking, plus developer documentation for OpenTelemetry usage. API surface enhancements for FxA-based user management and breach alerts introduced a create-user contract, FxA client API contract, and updated breach alerts docs. Subscriber data integrity fixes ensured SHA-1 hashes are updated when primary emails change and added robust error handling for non-existent subscribers and transaction failures. Maintenance and performance improvements included Pub/Sub optimization, removal of unnecessary exists checks, codepath cleanup, and dependency updates, reducing failure modes and keeping dependencies current.
February 2026
15 Commits • 3 Features
Feb 1, 2026February 2026 highlights for mozilla/blurts-server: Strengthened observability and reliability, expanded FxA-based user management and breach alert APIs, and tightened data integrity for subscriber emails, while performing targeted maintenance to boost performance and maintainability. Delivered backend instrumentation and monitoring improvements with OpenTelemetry optimization, environment/resource detection, k-anonymous metrics, and improved error tracking, plus developer documentation for OpenTelemetry usage. API surface enhancements for FxA-based user management and breach alerts introduced a create-user contract, FxA client API contract, and updated breach alerts docs. Subscriber data integrity fixes ensured SHA-1 hashes are updated when primary emails change and added robust error handling for non-existent subscribers and transaction failures. Maintenance and performance improvements included Pub/Sub optimization, removal of unnecessary exists checks, codepath cleanup, and dependency updates, reducing failure modes and keeping dependencies current.
January 2026
2 Commits • 2 Features
Jan 1, 2026January 2026 focused on hardening authentication for FXA flows and standardizing logging to improve security, reliability, and maintainability in mozilla/blurts-server. Delivered concrete security validation for FXA relay events and decoupled bearer token handling from React-specific code, alongside a centralized logging approach for subscriber management that enhances observability and troubleshooting. These changes reduce security risk, simplify future enhancements, and provide clearer operational insights for the team.
2 Commits • 2 Features
Jan 1, 2026January 2026 focused on hardening authentication for FXA flows and standardizing logging to improve security, reliability, and maintainability in mozilla/blurts-server. Delivered concrete security validation for FXA relay events and decoupled bearer token handling from React-specific code, alongside a centralized logging approach for subscriber management that enhances observability and troubleshooting. These changes reduce security risk, simplify future enhancements, and provide clearer operational insights for the team.
January 2026
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025: Focused on reliability, security, and stability. Key accomplishments include upgrading the authentication stack for nodemailer v6 compatibility and security, clarifying the authentication flow, and tightening dependency governance to prevent breaking changes. No critical bugs fixed this month; the work reduces risk and improves long-term maintainability.
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025: Focused on reliability, security, and stability. Key accomplishments include upgrading the authentication stack for nodemailer v6 compatibility and security, clarifying the authentication flow, and tightening dependency governance to prevent breaking changes. No critical bugs fixed this month; the work reduces risk and improves long-term maintainability.
October 2025
10 Commits • 7 Features
Oct 1, 2025October 2025 saw a focused push to improve maintainability, reliability, and developer efficiency for the blurts-server. Key work included (1) cleanup of deprecated subscriber tables (subscriber_churns, subscriber_coupons) with corresponding migrations changes and TypeScript interface removals, (2) local development improvements via Docker Compose to run PostgreSQL and a Pub/Sub emulator, with onboarding guidance, (3) dev tooling hygiene updates to exclude VS Code debugger configs, (4) integration test infrastructure and emulator-isolated CI workflow to ensure reliable end-to-end testing, (5) removal of the PetitionBannerCsatSurvey feature flag and all associated UI/tests/config, and (6) breach alerts reliability enhancements with improved cron error handling and added Sentry observability, plus updated breach alerts documentation and Jira traceability.
10 Commits • 7 Features
Oct 1, 2025October 2025 saw a focused push to improve maintainability, reliability, and developer efficiency for the blurts-server. Key work included (1) cleanup of deprecated subscriber tables (subscriber_churns, subscriber_coupons) with corresponding migrations changes and TypeScript interface removals, (2) local development improvements via Docker Compose to run PostgreSQL and a Pub/Sub emulator, with onboarding guidance, (3) dev tooling hygiene updates to exclude VS Code debugger configs, (4) integration test infrastructure and emulator-isolated CI workflow to ensure reliable end-to-end testing, (5) removal of the PetitionBannerCsatSurvey feature flag and all associated UI/tests/config, and (6) breach alerts reliability enhancements with improved cron error handling and added Sentry observability, plus updated breach alerts documentation and Jira traceability.
October 2025
Activity
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Quality Metrics
Correctness94.4%
Maintainability91.4%
Architecture91.8%
Performance91.2%
AI Usage21.4%
Skills & Technologies
Programming Languages
BashFTLJavaScriptMarkdownSCSSSQLShellTypeScriptYAMLgitignore
Technical Skills
API DevelopmentAPI developmentAWS SDKBackend DevelopmentCI/CDCloud EmulatorsCloud Services (GCP Pub/Sub)Code CleanupConfiguration ManagementCron JobsDatabase InteractionDatabase ManagementDevOpsDockerDocker Compose
Repositories Contributed To
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