hartwigmedical/actin
Jan 2026 – May 2026
5 Months active
Languages Used
KotlinMarkdownJavaXML
Technical Skills
Kotlinalgorithm designbackend developmentsoftware testingunit testingData Serialization
Eljo Dorrestijn
PROFILE
Eljo Dorrestijn
Over five months, contributed to the hartwigmedical/actin repository by delivering eight features focused on clinical data clarity, treatment eligibility, and system reliability. Work included enhancing the treatment matching system with molecular analysis-based filtering, improving data models for pathology reporting, and upgrading the application’s logging framework from log4j to kotlin-logging for better diagnostics. Leveraged Kotlin and Java to implement backend features such as case-insensitive ATC code resolution and robust evaluation functions for treatment decisions. Emphasized clean dependency management, build automation, and comprehensive unit testing, resulting in improved data quality, streamlined integration, and more reliable clinical decision support workflows.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
10Total
Bugs
0
Commits
10
Features
8
Lines of code
122,739
Activity Months5
Your Network
56 peopleSame Organization
@hartwigmedicalfoundation.nl34
Work History
May 2026
2 Commits • 2 Features
May 1, 2026May 2026 monthly summary for hartwigmedical/actin. Delivered two key features that enhance reliability and user experience: 1) Application Logging Framework Upgrade: migrated from log4j to kotlin-logging to standardize logging across the app, improving readability, diagnostics, and monitoring. 2) Medication Categories ATC Code Resolution—Case-Insensitive: implemented case-insensitive ATC code resolution to reduce user errors and improve data quality. These changes are tracked in commits ACTIN-3233 and ACTIN-3619. Business impact: improved observability, faster issue diagnosis, and smoother user experiences with minimal risk.
2 Commits • 2 Features
May 1, 2026May 2026 monthly summary for hartwigmedical/actin. Delivered two key features that enhance reliability and user experience: 1) Application Logging Framework Upgrade: migrated from log4j to kotlin-logging to standardize logging across the app, improving readability, diagnostics, and monitoring. 2) Medication Categories ATC Code Resolution—Case-Insensitive: implemented case-insensitive ATC code resolution to reduce user errors and improve data quality. These changes are tracked in commits ACTIN-3233 and ACTIN-3619. Business impact: improved observability, faster issue diagnosis, and smoother user experiences with minimal risk.
May 2026
April 2026
2 Commits • 2 Features
Apr 1, 2026April 2026: Focused on data model improvements and build/CI reliability for Actin. Delivered two features with clear business value: (1) Pathology reporting data model enhancement by moving biopsy location from TumorDetail to PathologyReport; (2) Build/integration improvement updating treatment DB version and removing unnecessary dependency exclusions. No major bugs fixed this month. Impact: clearer tumor evaluation data, faster, more reliable builds, and smoother integration with the treatment database. Technologies/skills demonstrated: data modeling, repository hygiene, dependency management, and CI/CD practices.
April 2026
2 Commits • 2 Features
Apr 1, 2026April 2026: Focused on data model improvements and build/CI reliability for Actin. Delivered two features with clear business value: (1) Pathology reporting data model enhancement by moving biopsy location from TumorDetail to PathologyReport; (2) Build/integration improvement updating treatment DB version and removing unnecessary dependency exclusions. No major bugs fixed this month. Impact: clearer tumor evaluation data, faster, more reliable builds, and smoother integration with the treatment database. Technologies/skills demonstrated: data modeling, repository hygiene, dependency management, and CI/CD practices.
March 2026
2 Commits • 1 Features
Mar 1, 2026Month: 2026-03 | Repository: hartwigmedical/actin. Focus: enhance treatment matching, improve drug data handling, stabilize dependencies, and harden security. Key actions included implementing molecular-analysis-based filtering in the Enhanced Treatment Matching System and enabling deserialization of drugs without synonyms, along with integrating a treatment-database dependency. Security hardening included excluding log4j from actin-common. Notable fixes: ACTIN-3210 - fix filtering of T-numbers in molecular details; ACTIN-3284 - deserialize drugs without synonyms and exclude log4j dependencies. Impact: improved patient-treatment matching accuracy, higher data quality, and safer dependency management.
2 Commits • 1 Features
Mar 1, 2026Month: 2026-03 | Repository: hartwigmedical/actin. Focus: enhance treatment matching, improve drug data handling, stabilize dependencies, and harden security. Key actions included implementing molecular-analysis-based filtering in the Enhanced Treatment Matching System and enabling deserialization of drugs without synonyms, along with integrating a treatment-database dependency. Security hardening included excluding log4j from actin-common. Notable fixes: ACTIN-3210 - fix filtering of T-numbers in molecular details; ACTIN-3284 - deserialize drugs without synonyms and exclude log4j dependencies. Impact: improved patient-treatment matching accuracy, higher data quality, and safer dependency management.
March 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for hartwigmedical/actin. Key feature delivered: introduced a new data retrieval capability in TreatmentDatabase that enables finding drug treatments by a set of drugs, enhancing clinical query support and decision-making. Commit ACTIN-3005: Add findDrugTreatmentByDrugs to TreatmentDatabase (#1442) ensures traceability of the change. Major bugs fixed: none reported this month. Overall impact: accelerates treatment discovery workflows, reduces manual curation, and lays groundwork for more advanced treatment-recommendation features. Technologies/skills demonstrated: API design and incremental feature development, commit-driven development with clear traceability, and cross-team collaboration via issue tracking.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for hartwigmedical/actin. Key feature delivered: introduced a new data retrieval capability in TreatmentDatabase that enables finding drug treatments by a set of drugs, enhancing clinical query support and decision-making. Commit ACTIN-3005: Add findDrugTreatmentByDrugs to TreatmentDatabase (#1442) ensures traceability of the change. Major bugs fixed: none reported this month. Overall impact: accelerates treatment discovery workflows, reduces manual curation, and lays groundwork for more advanced treatment-recommendation features. Technologies/skills demonstrated: API design and incremental feature development, commit-driven development with clear traceability, and cross-team collaboration via issue tracking.
January 2026
3 Commits • 2 Features
Jan 1, 2026January 2026 monthly summary for hartwigmedical/actin focusing on delivering features that enhance data clarity, treatment eligibility decision support, and QA coverage. Key measures include cleanup of clinical report terminology and the introduction of structured eligibility rules for dose reduction and radiological response, backed by evaluation functions and tests to ensure robust decision-making. These changes lay groundwork for safer treatments, improved patient information accuracy, and stronger regulatory-compliant reporting.
3 Commits • 2 Features
Jan 1, 2026January 2026 monthly summary for hartwigmedical/actin focusing on delivering features that enhance data clarity, treatment eligibility decision support, and QA coverage. Key measures include cleanup of clinical report terminology and the introduction of structured eligibility rules for dose reduction and radiological response, backed by evaluation functions and tests to ensure robust decision-making. These changes lay groundwork for safer treatments, improved patient information accuracy, and stronger regulatory-compliant reporting.
January 2026
Activity
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Quality Metrics
Correctness94.0%
Maintainability88.0%
Architecture92.0%
Performance88.0%
AI Usage26.0%
Skills & Technologies
Programming Languages
JavaKotlinMarkdownXML
Technical Skills
Data SerializationDependency ManagementDockerJavaKotlinLoggingMavenSoftware DevelopmentUnit Testingalgorithm designbackend developmentbuild automationdata analysisdatabase managementdependency management
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