
Santeri Korri contributed to Opetushallitus/ataru and viestinvalityspalvelu by building robust backend features focused on data consistency, access control, and system reliability. He implemented fine-grained authorization for educational counselors, introduced Redis caching to optimize school data retrieval, and enhanced API validation and documentation to improve developer experience. Using Clojure, Node.js, and CI/CD practices, Santeri delivered solutions such as background job retry strategies and schema updates for attachment tracking. His work addressed challenges in synchronization, error handling, and deployment safety, demonstrating a thoughtful approach to maintainability and performance across complex distributed systems in both educational and messaging domains.

January 2026 monthly summary for Opetushallitus/ataru focusing on key accomplishments, business value, and technical execution.
January 2026 monthly summary for Opetushallitus/ataru focusing on key accomplishments, business value, and technical execution.
January 2025 monthly summary: Delivered targeted features and stability improvements across two repos with measurable business value. In viestinvalityspalvelu, we enhanced API validation and documentation to reduce errors and improve developer experience, expanded recipient name length for better internationalization, hardened email handling to prevent system failures, and centralized API constants with deployment safeguards to enable safer, more predictable releases. In Ataru, we added a new status "started" for attachment preview generation to improve end-to-end tracking of attachments. These changes collectively improve reliability, scalability, and maintainability while strengthening release discipline and developer productivity.
January 2025 monthly summary: Delivered targeted features and stability improvements across two repos with measurable business value. In viestinvalityspalvelu, we enhanced API validation and documentation to reduce errors and improve developer experience, expanded recipient name length for better internationalization, hardened email handling to prevent system failures, and centralized API constants with deployment safeguards to enable safer, more predictable releases. In Ataru, we added a new status "started" for attachment preview generation to improve end-to-end tracking of attachments. These changes collectively improve reliability, scalability, and maintainability while strengthening release discipline and developer productivity.
December 2024 monthly summary focusing on key accomplishments for Opetushallitus/ataru. Delivered a Background Retry Strategy Enhancement for the attachment finalizer, merging default retry configuration into the finalizer job to enable automatic retries and improve robustness of background attachment processing. No major bugs reported or fixed this month. The work strengthens reliability of attachment handling and lays groundwork for future resilience improvements in the core processing pipeline.
December 2024 monthly summary focusing on key accomplishments for Opetushallitus/ataru. Delivered a Background Retry Strategy Enhancement for the attachment finalizer, merging default retry configuration into the finalizer job to enable automatic retries and improve robustness of background attachment processing. No major bugs reported or fixed this month. The work strengthens reliability of attachment handling and lays groundwork for future resilience improvements in the core processing pipeline.
October 2024 — Opetushallitus/ataru: Delivered key feature for application data consistency validation and cross-section synchronization, with unit tests. Ensured synchronization between application fields (hakukohteet) and corresponding answers, and standardized the order of target selections across sections by deriving values from the answers section. This work reduces data integrity risks and supports reliable submissions.
October 2024 — Opetushallitus/ataru: Delivered key feature for application data consistency validation and cross-section synchronization, with unit tests. Ensured synchronization between application fields (hakukohteet) and corresponding answers, and standardized the order of target selections across sections by deriving values from the answers section. This work reduces data integrity risks and supports reliable submissions.
2024-08: Focused on reliability and stability enhancements for Opetushallitus/ataru, delivering three bug fixes that improve startup reliability, cross-service synchronization, and CI/test stability. These changes reduce deployment risk, prevent desynchronization between core components, and accelerate the feedback loop, enabling safer releases and higher developer velocity.
2024-08: Focused on reliability and stability enhancements for Opetushallitus/ataru, delivering three bug fixes that improve startup reliability, cross-service synchronization, and CI/test stability. These changes reduce deployment risk, prevent desynchronization between core components, and accelerate the feedback loop, enabling safer releases and higher developer velocity.
Overview of all repositories you've contributed to across your timeline