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Jakob Havstein Eriksen

PROFILE

Jakob Havstein Eriksen

Jakob Havstein Eriksen developed and maintained core features for the navikt/helse-spesialist repository, focusing on backend reliability, data integrity, and performance. He refactored complex SQL queries and optimized database indexing to reduce latency for high-volume treatment data, while aligning data models with evolving business concepts. Jakob modernized API surfaces by migrating from GraphQL to REST, consolidated service logic, and improved test infrastructure for maintainability. Using Kotlin, SQL, and React, he addressed race conditions, enhanced audit logging for compliance, and streamlined CI/CD workflows. His work demonstrated depth in backend development, system integration, and continuous delivery, resulting in robust, scalable solutions.

Overall Statistics

Feature vs Bugs

74%Features

Repository Contributions

589Total
Bugs
83
Commits
589
Features
241
Lines of code
36,011
Activity Months20

Work History

March 2026

12 Commits • 5 Features

Mar 1, 2026

March 2026 monthly summary: Key features delivered include comprehensive application documentation (READMEs for spre-gosys and spre-oppgaver), Infotrygd data auto-update on person details, CI/CD workflow improvements triggered by changes to build-image.yml with broader YAML inclusion, and increased Kubernetes HPA threshold to 800 for healthier scaling. Major bugs fixed span data integrity and lifecycle handling, including safer deletion during decision recalculation, null handling in VedtaksperiodeForkastetRiver, and a cleanup removing an unused schema table; test alignment followed. Code quality improvements were pursued through assertion refactor for readability, complemented by broader project hygiene in CI/CD. Overall impact: These changes improve data integrity and safety in decision processing, reduce manual steps in data updates, and deliver more reliable and responsive release workflows. The efforts also optimize resource usage and scalability, delivering tangible business value by ensuring accurate decisions, up-to-date information, and faster, safer deployments. Technologies/skills demonstrated: data integrity and null handling, database schema maintenance and migrations, CI/CD pipeline optimization, Kubernetes HPA tuning, code readability and quality improvements, and documentation discipline.

February 2026

52 Commits • 25 Features

Feb 1, 2026

February 2026 performance-focused sprint delivering substantial backend query optimizations, reliability improvements, and API modernization across two repos (navikt/helse-spesialist and navikt/helse-speil). Key features delivered include Oppgavespørringen performance improvements (CTE usage, indexing, sorting fixes) and REST endpoint for processed tasks; GraphQL-to-REST migration and cleanup; Backend/API modernization and internal refactoring; End-user UX improvements in person search; and significant test tooling enhancements. Major bugs fixed include Dockerignore warning, a compilation error, not automatic approval in sick-leave notifications, test omission corrections, and deduplication fixes. Overall impact includes faster query latency and throughput, improved reliability and maintainability, safer processing flows with race-condition mitigation, and reduced security vulnerabilities through dependency upgrades. Technologies/skills demonstrated include PostgreSQL performance tuning (CTEs, indexing), SQL optimization, REST/GraphQL migration, code refactoring, test automation and stability improvements, logging/localization considerations, and time-handling improvements.

January 2026

37 Commits • 14 Features

Jan 1, 2026

January 2026 performance overview across Navikt platforms, highlighting delivery, refactors, and reliability improvements that drive business value. The month focused on enabling richer data interactions, aligning core data models with Behandling concepts, boosting query performance, and improving developer tooling and test reliability. Several migrations and cleanup efforts reduce technical debt and prepare for broader platform modernization.

December 2025

10 Commits • 5 Features

Dec 1, 2025

December 2025 delivered significant business value through localization improvements, performance optimizations, and modernization across three repositories. Key highlights include enabling Norwegian as the default language in helse-speil to reduce translation errors, improving UI performance by initializing the active income source at startup and removing redundant useEffect, stabilizing and modernizing the CI/CD pipeline with Java 21 compatibility, enhancing income period validation for sick leave to improve accuracy and tests, expanding diagnostics with secure logs for failure scenarios, and cleaning up deprecated APIs to harden the codebase. Impact: fewer translation-related customer issues, lower runtime re-renders, more reliable builds and deployments, improved observability, and a codebase aligned with newer platforms.

November 2025

4 Commits • 3 Features

Nov 1, 2025

November 2025 (navikt/helse-spesialist and navikt/helse-speil): Delivered performance-focused migrations improvements, strengthened data integrity via audit trails, and improved test quality. Key outcomes include: 1) Migration performance optimizations by disabling audit logging for the migrations user and refactoring a complex SQL query in PgPersonApiDao to simplify joins and drop unnecessary conditions, resulting in lower overhead and clearer code. 2) Test suite maintainability improved by removing a duplicate test case, reducing noise and increasing maintainability. 3) Health-spesial? The "User Personal Data Update & Audit Trail" feature for helse-speil adds mutation for updates and an audit log to record changes, enhancing data handling robustness and traceability. Overall impact: faster migrations, more reliable data handling, stronger auditability, and better maintainability across services. Technologies/skills: SQL optimization, migration tooling, mutation-based data updates, audit trail design, test suite maintenance, code refactoring, cross-service collaboration.

October 2025

3 Commits • 3 Features

Oct 1, 2025

October 2025 — Focus on strengthening security observability for PostgreSQL via audit logging across core services. Delivered standardized production audit logging configurations in three repositories, improving traceability, compliance readiness, and incident response capabilities.

September 2025

11 Commits • 6 Features

Sep 1, 2025

September 2025: Delivered notable performance improvements, data quality enhancements, and security/maintainability upgrades across four repositories. Key outcomes include faster treatment data retrieval, cleaner database schema, improved observability and test maintenance, user-facing terminology refinements, robust PDL schema versioning, and modernized CI/CD pipelines with dependency upgrades. These efforts reduce latency for complex datasets, lower maintenance costs, and strengthen security and reliability, delivering tangible business value.

August 2025

9 Commits • 4 Features

Aug 1, 2025

August 2025 monthly summary for NAV IT development across two repositories (navikt/helse-spesialist and navikt/helse-sparkelapper). Delivered concrete features and fixes with measurable business value: security hardening, data-model simplification, improved search usability, and readiness for re-reading of backdated sick notes.

July 2025

16 Commits • 7 Features

Jul 1, 2025

July 2025: Delivered reliability improvements, performance optimizations, and tooling modernization across multiple health-domain repositories. Implemented a critical bug fix in the approval workflow, accelerated data access paths, and consolidated build/tooling, while also tackling data integrity and cost-efficiency improvements.

June 2025

38 Commits • 11 Features

Jun 1, 2025

June 2025 monthly work summary for NHS Health apps portfolio. The month delivered high-impact features and stability improvements across three repositories: helse-spesialist, helse-sparkelapper, and helse-speil. The work focused on simplifying data models and API surfaces, upgrading task feeds, reinforcing data integrity, and raising production readiness through deployment/config enhancements and stronger test infrastructure. Business value was accelerated by reducing maintenance overhead, enabling faster feature delivery, and increasing reliability for frontline users (case managers, clinicians, and decision makers).

May 2025

14 Commits • 5 Features

May 1, 2025

May 2025 performance summary: Across four repositories, delivered cross-cutting improvements focused on stability, data consistency, and user experience. Key features include: NAIS build/config stability improvements in helse-sparkelapper, automatic Infotrygd data refresh and history UI enhancements in helse-speil, and a Spesidaler cleanup activation in helse-spleis. Major bug fix: SlettPersonRiver now enforces preconditions so only events named 'slett_person' are processed, boosting robustness. Naming clarity improved by renaming oppdaterSnapshot to oppdaterPersondata in helse-spesialist. Overall impact: more reliable builds, consistent case data, clearer code, and improved user-facing messaging. Technologies and skills demonstrated: CI/CD workflow hardening and build cleanup, conditional field generation, event preconditions, UI/UX refinements, cross-repo deployment/config changes, and data synchronization across the platform.

April 2025

63 Commits • 29 Features

Apr 1, 2025

April 2025 performance highlights across four health domains. Delivered measurable business value through new backdated sick leave processing, robust data handling, and improved operational reliability; while elevating code quality, testing rigor, and CI/CD practices. Key outcomes include stability improvements, better observability, and forward-leaning schema and documentation updates.

March 2025

33 Commits • 15 Features

Mar 1, 2025

Monthly summary for 2025-03 across four repositories (navikt/helse-spesialist, navikt/helse-speil, navikt/helse-sparkelapper, navikt/helse-spinnvill). This period delivered a mix of observability, reliability, and deployment improvements, alongside architectural cleanups and tooling upgrades that collectively tighten traceability, accelerate delivery, and improve security. Key outcomes include enhanced logging and traceability for processing workflows; simplified configuration via feature toggles and reduced authentication introspection; targeted deployment and scaling optimizations to support higher load; GraphQL model cleanup and compatibility fixes; and build/test quality improvements. Summary per area below, followed by business impact and skills demonstrated. Key features delivered and improvements: - helse-spesialist: Observability enhancements for processing and alerts (better log visibility for unprocessed messages, correct log placement, labeling of sensitive identifiers); testing and code quality improvements (immutable builders, robust tests); platform configuration simplification via feature toggles; deployment configuration adjustments for streamlined rollouts; GraphQL data model cleanup by removing deprecated inntektEndringAarsak in favor of inntektEndringAarsaker; Gradle wrapper upgrade. - helse-speil: Deployment scaling improvements for Speil and Wonderwall to handle higher load; GraphQL codegen tooling and local dev workflow enhancements (local generate-graphql against specialist, Bearer token support, updated docs); EndringÅrsak component refactor for better organization; sporadic error simulation in mocks to stress-test resilience; GraphQL error constructor compatibility fix; migration to array-based income change reasons (inntektEndringAarsaker); DevOps/config cleanup; hydration environment checks centralization. - helse-sparkelapper: DokumentRiver logging improvements and MDC-based tracing improvements; INST2 service endpoint updates for new URLs and outbound host adjustments. - helse-spinnvill: Secure deployment workflow enhancement by removing API key and moving to id-token write permission. Major bugs fixed: - GraphQL error constructor compatibility fix in VarselMock to align with newer GraphQL libraries, reducing runtime errors during tests and in production-like environments. Overall impact and accomplishments: - Significantly improved observability and traceability across critical flows, enabling faster diagnosis and reduced MTTR. - Simplified and more robust deployment/configuration processes, enabling safer rollouts and easier environment parity. - Increased deployment scalability and resilience to higher load, aligning with growing demand. - Strengthened data model hygiene and compatibility with GraphQL tooling, setting the stage for future schema evolution. - Elevated developer experience through improved local development workflows, testing reliability, and build stability. Technologies and skills demonstrated: - GraphQL and GraphQL codegen, MDC/logging, Kotlin, immutable data patterns, Gradle (upgrade to latest stable), Kubernetes deployment strategies, feature toggles, CI/CD configuration cleanup, local dev tooling improvements, and secure deployment practices.

February 2025

36 Commits • 13 Features

Feb 1, 2025

February 2025 (2025-02) monthly summary covering four repositories: helse-speil, helse-spesialist, helse-sparkelapper, og helse-spre. Delivered focused improvements in user experience, code quality, observability, and resilience across the stack, with measurable business value through faster, more reliable user interactions and improved maintainability.

January 2025

78 Commits • 29 Features

Jan 1, 2025

January 2025 performance summary focusing on delivering business value through reliability, maintainability, and improved developer velocity across multiple health-domain repos. Highlights include robust API communication, leaner request surfaces, privacy-conscious logging, streamlined CI/CD, and improved GraphQL setup and testing infrastructure.

December 2024

54 Commits • 16 Features

Dec 1, 2024

December 2024 monthly summary for developer team. Highlights include delivering critical features, fixing high-impact issues, and driving measurable business value across four repos: helse-spre, helse-spesialist, helse-speil, and helse-sparkelapper. The month focused on production readiness, developer experience, data quality, and observability.

November 2024

94 Commits • 44 Features

Nov 1, 2024

November 2024 focused on reliability, performance, and developer efficiency across health-spesialist, health-sparkelapper, health-speil, and health-spre services. Delivered lifecycle hardening, data-access performance improvements, and enhanced observability to enable faster diagnosis and better user experiences under higher load. Major bug fixes and CI/deploy improvements reduced maintenance overhead and improved platform stability, with measurable impact on startup reliability, responsiveness, and data-query performance.

October 2024

23 Commits • 7 Features

Oct 1, 2024

In October 2024, the helse-spesialist module underwent a broad but focused refactor to strengthen data access, improve robustness, and reduce architectural debt. The work delivered a solid foundation for scalable feature delivery, improved data integrity, and clearer developer ergonomics across the DAO layer.

June 2024

1 Commits

Jun 1, 2024

June 2024: Implemented initialization guard for rapidsConnection in helse-spesialist to prevent access before creation, eliminating a race condition and improving startup reliability. No user-facing features released; the work focuses on robustness, stability, and risk reduction. All changes documented under commit d8267d2c210a39fedd8496f5d6e0a9843776fb40.

April 2024

1 Commits

Apr 1, 2024

April 2024 — navikt/helse-spesialist: Delivered focused test cleanup for the Risk Assessment Module by removing obsolete risk tables, reducing database interaction overhead, and aligning tests with the current risk model. This work stabilizes test runs, lowers maintenance costs, and mitigates regression risk without changing production behavior.

Activity

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Quality Metrics

Correctness91.2%
Maintainability91.4%
Architecture87.8%
Performance86.6%
AI Usage20.4%

Skills & Technologies

Programming Languages

Avro SchemaBatchCSSDockerfileGoGradleGraphQLJSONJavaJavaScript

Technical Skills

API ClientAPI DesignAPI DevelopmentAPI IntegrationAPI TestingAPI developmentAPI integrationAPI testingAlertingApolloApollo ClientApplication ConfigurationApplication StartupAsynchronous ProgrammingAuthentication

Repositories Contributed To

7 repos

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

navikt/helse-spesialist

Apr 2024 Mar 2026
20 Months active

Languages Used

KotlinSQLJavaDockerfileGradleJSONYAMLGraphQL

Technical Skills

KotlinPostgreSQLbackend developmentdatabase managementapplication architectureBackend Development

navikt/helse-speil

Nov 2024 Mar 2026
14 Months active

Languages Used

CSSJavaScriptTypeScriptReactYAMLKotlinShellJSON

Technical Skills

Front End DevelopmentFront-end DevelopmentFrontend DevelopmentLocal StorageLocalizationReact

navikt/helse-sparkelapper

Nov 2024 Sep 2025
10 Months active

Languages Used

KotlinJavaYAMLAvro SchemaJSONMarkdown

Technical Skills

API IntegrationBackend DevelopmentError HandlingLoggingCI/CDGitHub Actions

navikt/helse-spre

Nov 2024 Mar 2026
7 Months active

Languages Used

KotlinYAMLJavaSQLMarkdown

Technical Skills

Backend DevelopmentCloud ConfigurationConfiguration ManagementDevOpsInfrastructureKubernetes

navikt/helse-spinnvill

Jan 2025 Mar 2026
9 Months active

Languages Used

YAMLKotlinGradleSQLShellTOML

Technical Skills

CI/CDGitHub ActionsDevOpsBackend DevelopmentUnit TestingBuild Configuration

nais/cli

Jan 2026 Jan 2026
1 Month active

Languages Used

Go

Technical Skills

GoPostgreSQLSQLbackend developmentdatabase management

navikt/helse-spleis

May 2025 Jan 2026
3 Months active

Languages Used

YAML

Technical Skills

Configuration ManagementDevOpsCloud ConfigurationDatabase AdministrationPostgreSQL