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Matias Vinjevoll

PROFILE

Matias Vinjevoll

Matias Vinjevoll developed and maintained backend systems for the navikt/aap-brev repository, focusing on document generation, journal handling, and access control. He engineered robust APIs and workflows for letter ordering, multi-recipient distribution, and PDF generation, integrating with external services like PDL and NOM for data enrichment. Using Kotlin, SQL, and Gradle, Matias emphasized clean code, data modeling, and validation logic to ensure reliability and maintainability. His work included refactoring for API evolution, improving error handling, and enhancing observability with Prometheus metrics. The solutions addressed data integrity, security, and scalability, demonstrating depth in backend architecture and continuous delivery practices.

Overall Statistics

Feature vs Bugs

72%Features

Repository Contributions

245Total
Bugs
36
Commits
245
Features
93
Lines of code
12,828
Activity Months13

Work History

October 2025

2 Commits • 1 Features

Oct 1, 2025

October 2025 for navikt/aap-brev focused on API reliability and codebase cleanliness. Delivered clearer client error responses for ValidationException and removed dead code to improve maintainability. These changes reduce error ambiguity for clients and decrease technical debt, enabling faster future feature work.

September 2025

1 Commits

Sep 1, 2025

September 2025 monthly summary for navikt/aap-oppgave focusing on build stability through a targeted dependency update. Updated behandlingsflyt from 0.0.425 to 0.0.426 in the build configuration to address potential fixes and align with downstream components. The change is isolated to build/configuration.

August 2025

15 Commits • 5 Features

Aug 1, 2025

August 2025 performance highlights across navikt/aap-brev and navikt/aap-meldekort-backend. Key business value delivered through feature enhancements in document generation, reliability improvements, and improved notification workflows. Major feature deliveries include document generation enhancements for AAP with start date and richer faktagrunnlag (daily rate, calculation time, calculation basis) plus weekly rate (UKESATS) and simplified handling of the calculation time point. Implemented a journalpost persistence fix to save only when the user is the recipient during transitions, reducing data inconsistency risk. Test infrastructure cleanup for Journalføring and Distribusjon tests reduced setup complexity and flakiness. System reliability improvements include graceful shutdown, logging of validation errors, BigDecimal formatting of faktagrunnlag, and removal of a processing-flow contract dependency. In navikt/aap-meldekort-backend, improved observability around notification sending and introduced synchronous Kafka sending to surface errors immediately. Overall impact: improved data integrity, reliability, observability, and business value in document generation and notification workflows. Technologies/skills demonstrated: observability instrumentation, integration test simplification, code quality improvements (graceful shutdown, validation error logging, BigDecimal handling), and synchronous messaging with Kafka.

July 2025

20 Commits • 4 Features

Jul 1, 2025

July 2025 monthly backend delivery focused on reliability, data integrity, and scalable multi-recipient workflows. Across the aap-meldekort-backend and aap-brev projects, the team delivered multi-recipient handling for letters, robust journaling lifecycle with a new repository, and strengthened archival/document handling. Notable outcomes include a corrected Kafka topic name for user notifications, standardized outbound logging for VarselService, and foundational data models and migrations to support recipient management and distributed journal posts.

June 2025

4 Commits • 1 Features

Jun 1, 2025

June 2025 performance highlights across three repos focused on reliability improvements, testing, and development acceleration. Key outcomes include stronger controls for automated letter sending, corrected distribution mapping logic, and an enhanced test environment, complemented by a unit-test fix in meldekort-backend to preserve test accuracy. These efforts reduce risk in production, improve data integrity, and speed up development cycles.

May 2025

19 Commits • 4 Features

May 1, 2025

May 2025 monthly summary focusing on key business value and technical achievements across aap-brev, aap-statistikk, and aap-oppgave. Delivered environment-aware access controls, API migration groundwork, new brevtypes, codebase cleanups, and data integrity improvements. Updated dependencies to 0.0.294 across modules, enabling performance fixes and stability.

April 2025

17 Commits • 5 Features

Apr 1, 2025

Summary for 2025-04: This month focused on delivering role-aware letter generation, safer letter ordering, and enhanced observability—driving accuracy, compliance, and faster issue diagnosis across the AAP platforms. Key features delivered: - navikt/aap-brev: Signature generation enhanced to support Rolle (roles) with Norg-based unit derivation; fixes for URL and edge cases; added /norg2 handling as needed. - PDF preview: New endpoint to preview generated letters as PDF before finalization. - Brevbestilling improvements: Enforced required user identifiers, improved journalpost status tracking, and protections for non-editable content. - Observability and test/development: Introduced real Prometheus metrics for REST clients and adjusted development/test insight flags. navikt/aap-statistikk: - Logging: Changed treatment of multi-cause treatments from warning to info to improve observability; no functional changes. Major bugs fixed: - Corrected fylkesenhet derivation when using Norg, fixed URL formation (/norg2 handling), and added safeguards when there are no signatures. - Ensured journalpost finish status is saved consistently, even when finalization is not triggered at creation. - Guarded non-editable content updates; added warnings where appropriate. Overall impact and accomplishments: - Increased accuracy of signaturgrunnlag and unit mapping, reducing manual corrections. - Improved user experience with a new PDF preview flow and stronger letter integrity checks. - Enhanced system observability and environment reliability, enabling faster diagnosis and safer development. Technologies/skills demonstrated: - Norg API integration, role-based data handling, Prometheus instrumentation, REST client telemetry, and CI/dev environment adjustments. Business value: - Faster, more reliable letter generation; better compliance with role-based routing; reduced risk through data integrity checks and improved monitoring.

March 2025

20 Commits • 3 Features

Mar 1, 2025

March 2025 monthly summary for navikt/aap-brev: Delivered three core features that strengthen letter workflows, enhanced data-driven personalization via PDL/NOM integration, and improved signature handling with previews. Implemented test robustness and dev/test ergonomics to support ongoing delivery. Key outcomes include a Cancel Letter Order feature with a new API endpoint and state validation, PDL/NOM integration with environment configuration and gateways for person and employee data, and enhanced signature management including endpoints to fetch/preview signatures with privacy-aware formatting. Impact includes faster, more reliable letter cancellation, improved data accuracy for personalized communications, and clearer signer handling with safer privacy rules. Technologies demonstrated span API design and state-driven workflows, PDL/NOM data access patterns, environment configuration, signature retrieval/preview logic, and test/fake infrastructure improvements.

February 2025

4 Commits • 2 Features

Feb 1, 2025

February 2025 deliverables for repo navikt/aap-brev focused on reliability and data fidelity in PDF generation and letter composition. Implemented multilingual date formatting to ensure full-length date strings are consistently applied before PDF generation requests. Enhanced letter generation to support multiple faktagrunnlag values with improved data type mapping and merge logic, enabling richer, accurate communications. Removed the TESTVERDI faktagrunnlag, updated dependencies, and refactored references to ensure only relevant faktagrunnlag types are processed, reducing maintenance risk. Overall this work improves document accuracy, reduces edge-case errors, and simplifies future enhancements through clearer data flow and dependency hygiene. Technologies demonstrated include refactoring for data mapping, language-aware formatting utilities, dependency updates, and multi-value data handling.

January 2025

46 Commits • 23 Features

Jan 1, 2025

Monthly summary for 2025-01 focusing on dev/test tooling, data model improvements, validation and error handling, code quality, and observability across the AAP projects. Highlights include dev/test utilities (Azure token generator), enhanced data modeling and search capabilities, improved validation and error handling, and ongoing code cleanup and system maintenance. Ancillary documentation improvement in the Kelvin components repository is also noted.

December 2024

32 Commits • 23 Features

Dec 1, 2024

December 2024 performance highlights across navikt/aap-brev and navikt/aap-tilgang. Delivered end-to-end journal handling improvements, API evolution, and attachment capabilities that accelerate clinician workflows and reduce cycle times. Key work spanned validation scaffolding, non-dev deployment readiness, enhanced journalpost lifecycle, attachment management, and plugin documentation enhancements. The work laid foundations for reliable Faktagrunnlag handling, robust data integrity checks, and clearer developer ergonomics through improved return types and resolver architecture. Business value realized includes faster and more reliable journalpost processing, improved document routing and retrieval for clinicians, and stronger end-user data consistency with new fields and safer non-dev operations. Representative outcomes: expanded API surfaces (journalføring response, document retrieval, attachments), persistent attachment storage, JOURNALPOST_FERDIGSTILT column, non-dev deployment readiness, and developer-facing improvements (JournalpostIdResolver, AutorisertEksempelApp, Tilgang plugin docs).

November 2024

53 Commits • 19 Features

Nov 1, 2024

November 2024 saw significant progress across letter generation, document retrieval, and access control domains. Key features delivered include end-to-end PDF letter generation with pdfgen integration (and a streamlined letter model), exposure of saksnummer for letter orders, and updates to access policies to support outbound/inbound processing. We also activated the journalføring flow with a new data model and improved error handling, introduced a document retrieval API for generating and journaling letters, and rolled enhancements to the authorization framework to support multi-method access and machine-to-machine clients. In addition, a series of tests, scaffolding, and refactors improved maintainability and reliability. The outcome: faster, traceable document workflows with stronger security and easier future evolution.

October 2024

12 Commits • 3 Features

Oct 1, 2024

October 2024: Delivered critical end-to-end improvements to the Brevbestilling workflow, strengthened testing and resilience, and simplified platform networking. Key features delivered include the Brevbestilling lifecycle overhaul with unique identifiers, UUIDs across Brev components, a new LøsBrevbestilling step, and improved lookup via a REFERANSE index; additional improvements to status handling and contract alignment. Testing infrastructure was upgraded to Kotlin/Ktor 3 with a new mock endpoint for brev løsning-bestilling, refactored Fakes, and removal of duplicate code. Bugs fixed include adding resilience to processing when integration points fail and providing meaningful 202 responses for accepted API calls, reducing downtime and improving user experience. Platform infra was streamlined by removing the outbound access rule reliance and shifting access checks to azp, improving security posture and maintainability. The combined effect is improved reliability, traceability, and faster, safer deployments with clearer data models and better API behavior.

Activity

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Quality Metrics

Correctness88.8%
Maintainability89.8%
Architecture87.2%
Performance83.4%
AI Usage20.2%

Skills & Technologies

Programming Languages

GradleGraphQLJavaKotlinMarkdownSQLYAMLkotlinyaml

Technical Skills

API DesignAPI DevelopmentAPI IntegrationAPI SecurityAccess ControlApplication Lifecycle ManagementAuthenticationAuthorizationBackend DevelopmentBug FixingClean CodeCode CleanupCode Duplication RemovalCode FormattingCode Organization

Repositories Contributed To

7 repos

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

navikt/aap-brev

Oct 2024 Oct 2025
12 Months active

Languages Used

GradleJavaKotlinSQLYAMLkotlinGraphQLyaml

Technical Skills

API DesignAPI DevelopmentAPI IntegrationBackend DevelopmentCode Duplication RemovalConfiguration Management

navikt/aap-tilgang

Nov 2024 Dec 2024
2 Months active

Languages Used

GradleJavaKotlinMarkdown

Technical Skills

API DevelopmentAPI SecurityAccess ControlBackend DevelopmentCode FormattingDependency Management

navikt/aap-meldekort-backend

Jun 2025 Aug 2025
3 Months active

Languages Used

Kotlin

Technical Skills

Backend DevelopmentTestingBug FixingKafkaLoggingError Handling

navikt/aap-statistikk

Apr 2025 May 2025
2 Months active

Languages Used

KotlinGradle

Technical Skills

LoggingDependency Management

navikt/aap-oppgave

May 2025 Sep 2025
2 Months active

Languages Used

GradleKotlin

Technical Skills

Dependency Management

navikt/aap-kelvin-komponenter

Jan 2025 Jan 2025
1 Month active

Languages Used

Kotlin

Technical Skills

Documentation

navikt/aap-arenaoppslag

Jun 2025 Jun 2025
1 Month active

Languages Used

JavaKotlin

Technical Skills

Backend DevelopmentKtorTesting

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