November 2025 monthly summary focusing on performance improvements, reliability enhancements, and modernization across kouta-backend and ATARU. Delivered targeted read-optimization, audit-log integrity fixes, and robust messaging stack upgrades. Result: lower read latency, more complete audit trails, and dependable SQS/SNS processing, supported by AWS SDK migrations and code refactors.

Month: 2025-09 — Opetushallitus/kouta-backend Overview: Focused on delivering secure, maintainable authentication improvements and strengthening the platform’s security posture through dependency upgrades, with no separate bug-fix releases highlighted this month. Key features delivered: - CAS Login Flow Enhancement: Implemented a new CAS login flow that reads user details directly from the service ticket validation response, eliminating the need for a separate userDetails API call. This reduces authentication round-trips and simplifies the login surface. - Platform Security and Dependency Upgrade: Upgraded Java to version 21 and refreshed dependencies to address security vulnerabilities and ensure compatibility with updated libraries. Major bugs fixed: - No standalone bug-fixes were reported this month. Security-related issues were mitigated through dependency upgrades and platform updates. Overall impact and accomplishments: - Security posture strengthened by timely Java and dependency updates, reducing vulnerability exposure and aligning with governance requirements. - Improved authentication performance and reliability by removing an extra API call in the login flow. - Maintained maintainability and future-proofing through library upgrades and streamlined auth logic. Technologies/skills demonstrated: - Java 21, secure dependency management, CAS authentication integration, and code-path simplification for login flow.