
Charlie Midtlyng contributed to a range of NAV repositories, building features and resolving bugs across backend and frontend systems. In navikt/familie-ef-sak and related projects, Charlie implemented migration logic, improved data integrity, and modernized runtime stacks using Kotlin, React, and TypeScript. He enhanced observability and reliability in aap-arenaoppslag and aap-api-intern by configuring centralized logging and refining deserialization with DefaultJsonMapper. His work included database optimization, feature toggling, and infrastructure as code, addressing both user-facing and operational challenges. The solutions demonstrated depth in system design, maintainability, and cross-repo collaboration, resulting in more robust, testable, and scalable services.

October 2025 — Delivered reliability and stability improvements in two critical components: Frontend letter status resolution in aap-brev and Kelvin-based access control lookup stabilization in aap-tilgang. The changes reduce incorrect UI states and prevent crashes, delivering tangible business value in terms of user experience and system reliability. Key outcomes include consistent status presentation for letter orders and robust access checks anchored to Kelvin case numbers.
October 2025 — Delivered reliability and stability improvements in two critical components: Frontend letter status resolution in aap-brev and Kelvin-based access control lookup stabilization in aap-tilgang. The changes reduce incorrect UI states and prevent crashes, delivering tangible business value in terms of user experience and system reliability. Key outcomes include consistent status presentation for letter orders and robust access checks anchored to Kelvin case numbers.
September 2025 monthly summary: Delivered stability improvements and new capability across three repos. Enabled avklaringsbehovkode support in behandlingsflyt, stabilized PostgreSQL driver compatibility, and improved error handling for overlapping rettighetsperioder in the Saker domain. These changes reduce runtime failures, improve diagnostics, and support smoother user workflows in behandlingsflyt and meldekort processing across the AAP services.
September 2025 monthly summary: Delivered stability improvements and new capability across three repos. Enabled avklaringsbehovkode support in behandlingsflyt, stabilized PostgreSQL driver compatibility, and improved error handling for overlapping rettighetsperioder in the Saker domain. These changes reduce runtime failures, improve diagnostics, and support smoother user workflows in behandlingsflyt and meldekort processing across the AAP services.
August 2025 summary: Performance-focused enhancements across the AAP task management and background job processing domains, delivering concrete business value through better task categorization, faster processing, and more reliable workloads. Implemented new creation reason handling and migration to the vurderingsbehov model for AAP tasks, and sharpened storage and data transfer in the AAP-oppgave module. In the AAP-Kelvin components, improved job processing reliability and performance by replacing UNION with UNION ALL, adding ORDER BY, preventing duplicate executions via tests, and introducing explicit timestamps for job lifecycle events to enable accurate duration metrics. System stability and resource efficiency also improved with shorter HTTP timeouts and a calmer retry cadence for failed jobs. These changes collectively enhance scalability, observability, and operational risk management while delivering faster, more predictable task processing for business users.
August 2025 summary: Performance-focused enhancements across the AAP task management and background job processing domains, delivering concrete business value through better task categorization, faster processing, and more reliable workloads. Implemented new creation reason handling and migration to the vurderingsbehov model for AAP tasks, and sharpened storage and data transfer in the AAP-oppgave module. In the AAP-Kelvin components, improved job processing reliability and performance by replacing UNION with UNION ALL, adding ORDER BY, preventing duplicate executions via tests, and introducing explicit timestamps for job lifecycle events to enable accurate duration metrics. System stability and resource efficiency also improved with shorter HTTP timeouts and a calmer retry cadence for failed jobs. These changes collectively enhance scalability, observability, and operational risk management while delivering faster, more predictable task processing for business users.
June 2025: Delivered observability, reliability, and governance improvements across the aap-arenaoppslag, aap-api-intern, and aap-oppgave repositories. Key work includes configuring application logging to Loki and Elasticsearch via the .nais/app.yml update, improving request deserialization reliability by switching to DefaultJsonMapper and adding tests for fetching cases by person identifier, and enhancing API endpoint visibility with additive logging (no functional changes). Introduced access-denied logging for task pickup to improve authorization diagnostics. These changes enable faster root-cause analysis, safer task handling, and better auditability. Technologies demonstrated include Loki/Elasticsearch logging, DefaultJsonMapper-based deserialization, test-driven development, and instrumentation in Kotlin/Java development practice.
June 2025: Delivered observability, reliability, and governance improvements across the aap-arenaoppslag, aap-api-intern, and aap-oppgave repositories. Key work includes configuring application logging to Loki and Elasticsearch via the .nais/app.yml update, improving request deserialization reliability by switching to DefaultJsonMapper and adding tests for fetching cases by person identifier, and enhancing API endpoint visibility with additive logging (no functional changes). Introduced access-denied logging for task pickup to improve authorization diagnostics. These changes enable faster root-cause analysis, safer task handling, and better auditability. Technologies demonstrated include Loki/Elasticsearch logging, DefaultJsonMapper-based deserialization, test-driven development, and instrumentation in Kotlin/Java development practice.
May 2025 performance summary: Delivered cross-repo improvements focusing on developer experience, reliability, and user usability. Highlights include local development URL guidance for Meldekort frontend, corrected unsubmitted meldekort detection, retry-enabled OBO token fetch, case-insensitive task search, and configurable RestClient HTTP retries. These changes reduce onboarding friction, increase data correctness, improve resilience to timeouts, and enhance user usability.
May 2025 performance summary: Delivered cross-repo improvements focusing on developer experience, reliability, and user usability. Highlights include local development URL guidance for Meldekort frontend, corrected unsubmitted meldekort detection, retry-enabled OBO token fetch, case-insensitive task search, and configurable RestClient HTTP retries. These changes reduce onboarding friction, increase data correctness, improve resilience to timeouts, and enhance user usability.
Month: 2025-03 — Delivered environment-specific outbound access configuration for navikt/aap-tilgang, introducing external-outbound-hosts to centralize and clarify allowed outbound connections per environment (development and production). This improves security posture and maintainability by reducing configuration drift and ensuring environment isolation. No major bugs fixed in this repository this month. Impact: stronger security, easier cross-environment deployments, and better auditability across PDL and SAF access. Technologies/skills demonstrated: environment-specific configuration in nais-files, security hardening, centralized configuration management, and clear commit traceability (e87e1df165ce968d949a3d71132d134c642bf6dc).
Month: 2025-03 — Delivered environment-specific outbound access configuration for navikt/aap-tilgang, introducing external-outbound-hosts to centralize and clarify allowed outbound connections per environment (development and production). This improves security posture and maintainability by reducing configuration drift and ensuring environment isolation. No major bugs fixed in this repository this month. Impact: stronger security, easier cross-environment deployments, and better auditability across PDL and SAF access. Technologies/skills demonstrated: environment-specific configuration in nais-files, security hardening, centralized configuration management, and clear commit traceability (e87e1df165ce968d949a3d71132d134c642bf6dc).
February 2025 performance summary for the developer team. The month combined stability improvements, strategic technology migrations, and UI/UX refinements across multiple services to deliver business value and reduce manual effort. Notable migration work from Redis to ValKey was completed in key frontends, alongside UI simplifications and test quality improvements that promote reliability and maintainability.
February 2025 performance summary for the developer team. The month combined stability improvements, strategic technology migrations, and UI/UX refinements across multiple services to deliver business value and reduce manual effort. Notable migration work from Redis to ValKey was completed in key frontends, alongside UI simplifications and test quality improvements that promote reliability and maintainability.
January 2025 performance summary: Delivered modernization and stability improvements across key frontend repositories, updated core stack to React 19, and removed legacy dependencies to shrink build size and simplify maintenance. Implemented production logic simplifications by removing feature toggles, and delivered targeted UX enhancements in navigation and editing experiences. Strengthened reliability through distribution fixes, recipient enforcement for letters, and robust PDF handling with explicit language context. Demonstrated strong cross-repo collaboration and tooling improvements, resulting in faster delivery, fewer flaky tests, and a more predictable user experience.
January 2025 performance summary: Delivered modernization and stability improvements across key frontend repositories, updated core stack to React 19, and removed legacy dependencies to shrink build size and simplify maintenance. Implemented production logic simplifications by removing feature toggles, and delivered targeted UX enhancements in navigation and editing experiences. Strengthened reliability through distribution fixes, recipient enforcement for letters, and robust PDF handling with explicit language context. Demonstrated strong cross-repo collaboration and tooling improvements, resulting in faster delivery, fewer flaky tests, and a more predictable user experience.
December 2024 monthly summary for developer teams. Focused on enhancing templating and navigation safety, delivering feature-rich editing experiences, and strengthening data integrity across frontend repos. Business value delivered includes faster template authoring, safer user interactions, and reliable submission workflows across multiple applications.
December 2024 monthly summary for developer teams. Focused on enhancing templating and navigation safety, delivering feature-rich editing experiences, and strengthening data integrity across frontend repos. Business value delivered includes faster template authoring, safer user interactions, and reliable submission workflows across multiple applications.
November 2024 highlights: Delivered measurable business value through UI clarity, data integrity, platform modernization, and improved developer experience. Key outcomes include UI text simplification in HistoriskeVurderingermeny to improve readability; database integrity hardening in familie-ef-sak to prevent duplicate conditions; runtime stack modernization and routing stability improvements in frontend repos to boost reliability; branding capitalization standardization across NAV/Name usage in generated materials and UI texts; and deployment/dev tooling improvements enabling leaner production builds and faster onboarding. These changes reduce user friction, eliminate data duplication risks, enhance deployment reliability, and improve cross-repo branding consistency.
November 2024 highlights: Delivered measurable business value through UI clarity, data integrity, platform modernization, and improved developer experience. Key outcomes include UI text simplification in HistoriskeVurderingermeny to improve readability; database integrity hardening in familie-ef-sak to prevent duplicate conditions; runtime stack modernization and routing stability improvements in frontend repos to boost reliability; branding capitalization standardization across NAV/Name usage in generated materials and UI texts; and deployment/dev tooling improvements enabling leaner production builds and faster onboarding. These changes reduce user friction, eliminate data duplication risks, enhance deployment reliability, and improve cross-repo branding consistency.
October 2024 highlights for navikt/familie-ef-sak. Key features delivered: - Early data migration support to 2009 via feature toggle TILLAT_MIGRERING_7_ÅR_TILBAKE. When enabled, migrations can target 2009. The migration boundary helper hentDatogrenseForMigrering now returns 2009-01-01 in this scenario. Tests were updated to reflect the 2009 migration window. Commits: eb794af2818f8ea952c03e8e45ccae9bd225b73c; 399988e9ceb14cad1f39415f722b5f099a1dc130. Major bugs fixed: - Rollback/adjust migration limit to 2016 with the feature toggle. Reverts the 2009 allowance and enforces a 2016-01-01 migration limit when the toggle is enabled. Updates to service logic and tests reflect this change. Commit: bdca9f6dfdfcc2e379539a2283e957705fd821c8. Overall impact and accomplishments: - Provides controlled, auditable migration behavior via a feature toggle, balancing data accessibility with governance. Improved test coverage and a clear commit trail enhance maintainability and risk management. Technologies/skills demonstrated: - Feature flags and toggle-driven behavior, boundary condition reasoning for migration windows, service-layer updates, regression testing, and test-driven adjustments with strong traceability.
October 2024 highlights for navikt/familie-ef-sak. Key features delivered: - Early data migration support to 2009 via feature toggle TILLAT_MIGRERING_7_ÅR_TILBAKE. When enabled, migrations can target 2009. The migration boundary helper hentDatogrenseForMigrering now returns 2009-01-01 in this scenario. Tests were updated to reflect the 2009 migration window. Commits: eb794af2818f8ea952c03e8e45ccae9bd225b73c; 399988e9ceb14cad1f39415f722b5f099a1dc130. Major bugs fixed: - Rollback/adjust migration limit to 2016 with the feature toggle. Reverts the 2009 allowance and enforces a 2016-01-01 migration limit when the toggle is enabled. Updates to service logic and tests reflect this change. Commit: bdca9f6dfdfcc2e379539a2283e957705fd821c8. Overall impact and accomplishments: - Provides controlled, auditable migration behavior via a feature toggle, balancing data accessibility with governance. Improved test coverage and a clear commit trail enhance maintainability and risk management. Technologies/skills demonstrated: - Feature flags and toggle-driven behavior, boundary condition reasoning for migration windows, service-layer updates, regression testing, and test-driven adjustments with strong traceability.
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