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Heidi Lammi-Mihaljov

PROFILE

Heidi Lammi-mihaljov

Contributed to the Opetushallitus/kouta-backend repository by designing and implementing multilingual classification term management, centralizing display name generation, and refining the backend data model for educational offerings. Leveraged Scala, Java, and SQL to build robust APIs, simplify schema complexity, and unify taxonomy with existing keyword systems, improving search and discoverability. Enhanced deployment governance through CI/CD workflow updates using GitHub Actions and ensured accurate versioning for reliable releases. Focused on code organization and refactoring, the work included removing unused endpoints, consolidating utility logic, and enriching data pipelines, resulting in more maintainable code and consistent data presentation across backend services.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

11Total
Bugs
1
Commits
11
Features
7
Lines of code
1,828
Activity Months4

Work History

September 2025

7 Commits • 4 Features

Sep 1, 2025

September 2025 monthly summary for Opetushallitus/kouta-backend. Focused on delivering a centralized display-name generation mechanism, enriching HakutietoHakukohde with display and modifier names, API surface cleanup, and deployment governance improvements. These changes deliver consistent data presentation, reduced maintenance, lower risk releases, and improved development velocity.

July 2025

1 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary for Opetushallitus/kouta-backend focusing on business value and technical excellence. Deliverables centered on release readiness and versioning accuracy following a master branch rebase, enabling reliable downstream builds and artifact provenance.

June 2025

2 Commits • 1 Features

Jun 1, 2025

June 2025 performance highlights for Opetushallitus/kouta-backend: Delivered a backend data model refactor for classification terms and made the Muokkaaja.nimi property optional, addressing real-world edge cases and simplifying the data model. These changes reduce schema complexity and improve search/storage reliability, while keeping tests green and maintaining feature delivery velocity. Key commits are linked to the changes.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for Opetushallitus/kouta-backend focusing on key accomplishments, impact, and skills demonstrated.

Activity

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Quality Metrics

Correctness92.8%
Maintainability92.8%
Architecture92.8%
Performance90.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

JavaSQLScalaYAML

Technical Skills

API DesignAPI DevelopmentBackend DevelopmentCI/CDCode OrganizationCode RefactoringDatabase ManagementGitHub ActionsObject-Oriented DesignRefactoringScalaUtility Class CreationVersion Control

Repositories Contributed To

1 repo

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

Opetushallitus/kouta-backend

May 2025 Sep 2025
4 Months active

Languages Used

SQLScalaJavaYAML

Technical Skills

API DevelopmentBackend DevelopmentDatabase ManagementAPI DesignScalaVersion Control