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Mike Erkemeij

PROFILE

Mike Erkemeij

Over nine months, M.J.J.S. Erkemeij developed and maintained the wearefrank/haalcentraal-connector, focusing on backend reliability, data integrity, and privacy-first data handling. He implemented robust API development and integration using Java and SQL, introducing features such as BSN privacy filtering, deterministic database queries, and hash-based data validation. His work included refactoring for maintainability, expanding test coverage with integration testing, and automating CI/CD pipelines with Docker and GitHub Actions. By aligning data processing with schema standards and improving error handling, he reduced deployment risk and improved code quality, demonstrating a thorough, iterative approach to solving complex backend and data management challenges.

Overall Statistics

Feature vs Bugs

76%Features

Repository Contributions

47Total
Bugs
6
Commits
47
Features
19
Lines of code
3,623
Activity Months9

Work History

July 2025

2 Commits • 1 Features

Jul 1, 2025

Concise monthly summary for 2025-07 focusing on feature delivery and reliability improvements for the wearefrank/haalcentraal-connector.

June 2025

2 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary for wearefrank/haalcentraal-connector. Focused on improving reliability and test coverage for the subscription adapter, specifically around personal keys scenarios. Delivered enhanced testing for new subscriptions (with and without BSN), existing subscriptions, and scenarios with missing key mappings. Included end-to-end test interactions with GetBsnByPersoonsSleutel and EndSubscription to validate adapter behavior under real-world conditions. Resulted in stabilized test runs and better risk mitigation for production changes in the subscription flow.

May 2025

7 Commits • 2 Features

May 1, 2025

Monthly summary for 2025-05: Focused on privacy-first data handling and robust API behavior in the haalcentraal-connector. Key features delivered include BSN privacy filtering improvements, BSN lookup by PersoonsSleutel, and API error handling enhancements. Refactors improved readability and maintainability. These changes reduce privacy risk, enable flexible data access, and improve API reliability, delivering concrete business value.

April 2025

3 Commits • 1 Features

Apr 1, 2025

Month: 2025-04. This period focused on stabilizing the haalcentraal-connector while enhancing maintainability through an internal forward-path refactor. Deliverables improved code quality and CI reliability without external behavior changes, enabling faster iteration and clearer ownership. The changes reduce risk in deployments and prepare the codebase for upcoming features and scale.

March 2025

7 Commits • 4 Features

Mar 1, 2025

March 2025 monthly summary for the haalcentraal-connector repository, focusing on delivering robust framework upgrades, automation, and data integrity improvements that reduce risk and accelerate deployment cycles.

February 2025

5 Commits • 3 Features

Feb 1, 2025

February 2025 monthly summary for wearefrank/haalcentraal-connector: Delivered critical data processing validation and schema alignment improvements, introduced a new name-change workflow for resources, and performed focused code cleanup to reduce technical debt and improve maintainability. These changes enhance data reliability, schema conformance, and user workflow efficiency, enabling smoother operations and easier future iterations.

January 2025

4 Commits • 2 Features

Jan 1, 2025

January 2025 monthly summary for wearefrank/haalcentraal-connector: Focused on reliability and data integrity, delivering robust client error signaling and data standardization with groundwork for future hashing validation. These changes enhance downstream reliability and code maintainability.

December 2024

5 Commits • 1 Features

Dec 1, 2024

December 2024 monthly summary for the wearefrank/haalcentraal-connector: Delivered feature-flag driven activation for the Notification Processor API in staging with cleanup of deployment-specific endpoint properties, enabling safer staging and streamlined production rollout. Implemented targeted API data handling and response formatting fixes to improve reliability and data integrity.

November 2024

12 Commits • 4 Features

Nov 1, 2024

November 2024 monthly summary for wearefrank/haalcentraal-connector. Delivered reliability, data processing, and observability improvements across the connector, translating to measurable business value and safer deployments.

Activity

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Quality Metrics

Correctness80.8%
Maintainability83.0%
Architecture76.2%
Performance75.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

DockerfileJavaJavaScriptJsonnetPythonSQLTypeScriptXMLXSLTYAML

Technical Skills

API DevelopmentAPI IntegrationAutomationBackend DevelopmentCI/CDCode DocumentationConfigurationConfiguration ManagementConnector DevelopmentData FilteringData IntegrityData ProcessingData TransformationDatabaseDatabase Management

Repositories Contributed To

1 repo

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

wearefrank/haalcentraal-connector

Nov 2024 Jul 2025
9 Months active

Languages Used

JavaJavaScriptJsonnetPythonSQLTypeScriptXMLproperties

Technical Skills

API IntegrationAutomationBackend DevelopmentConfiguration ManagementConnector DevelopmentDatabase Management

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