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Carles Arnal

PROFILE

Carles Arnal

Over the past 14 months, contributed to Apicurio/apicurio-registry and related projects by building robust backend features, enhancing security, and improving developer workflows. Delivered artifact reference management, Iceberg REST Catalog APIs, and unified authentication using Java, Quarkus, and Kubernetes. Focused on API design, schema validation for Avro, Protobuf, and JSON Schema, and implemented OpenTelemetry for observability. Strengthened CI/CD pipelines, introduced flexible storage backends, and enabled secure deployments with OAuth2, mTLS, and RBAC. Enhanced UI with artifact comparison and model schema support, while maintaining comprehensive test coverage. Prioritized maintainability, interoperability, and performance, resulting in a more reliable and scalable platform.

Overall Statistics

Feature vs Bugs

78%Features

Repository Contributions

121Total
Bugs
19
Commits
121
Features
68
Lines of code
127,096
Activity Months14

Work History

May 2026

1 Commits • 1 Features

May 1, 2026

May 2026 (quarkusio/quarkus) — Key feature delivered: User Token Principal Claims Enhancement with nested JSON path support in token.principal-claim for UserInfo, enabling more flexible and accurate user data retrieval. No major bugs fixed this month. Business value: improves authorization accuracy, reduces client-side parsing, and simplifies downstream integrations. Technical achievements: enhanced token processing in Quarkus, JSON path handling, and AI-assisted code review collaboration (Claude-opus-4-6).

April 2026

13 Commits • 10 Features

Apr 1, 2026

2026-04 monthly summary focusing on key accomplishments, major technical deliverables, and business impact across Apicurio/apicurio-registry and k-wall/kroxylicious.

March 2026

23 Commits • 12 Features

Mar 1, 2026

March 2026 was a period of notable capability expansions, storage flexibility, and hardened security for Apicurio Registry and related projects. Key outcomes include delivering Iceberg REST Catalog API Phase 1 and Phase 2 (CommitTable) to enable Iceberg metadata management and atomic updates; enabling Kubernetes-based storage variants (GitOps ConfigMap storage via KubernetesOps with a real-time Watch API) to broaden artifact storage options; integrating Strimzi Kafka Access Operator for secure Kafka connectivity; expanding UI to support MODEL_SCHEMA and PROMPT_TEMPLATE with embedded schema extraction and richer visualizers; introducing a dedicated management interface on port 9000 to isolate health/metrics traffic; upgrading runtime to Java 21 and base images to UBI 10; parallelizing CI feature tests to shorten feedback cycles; and strengthening security with dependency upgrades, OIDC token refresh refactor to Vert.x WebClient, and TLS support for private CA in schema validation. Documentation improvements and onboarding updates accompanied these changes to improve developer experience and governance.

February 2026

5 Commits • 3 Features

Feb 1, 2026

February 2026 monthly summary for Apicurio Registry: Delivered security and interoperability enhancements, upgraded test infrastructure, and strengthened schema validation. Focused on Azure Entra ID authentication enhancements, Kafka test migration to KRaft mode, JSON Schema support for LLM artifacts with MCP integration, and enhanced Protobuf schema validation to improve reliability and developer confidence.

January 2026

24 Commits • 16 Features

Jan 1, 2026

January 2026 highlights: Delivered OpenTelemetry integration across Apicurio Registry, improving observability and diagnostics, while expanding developer workflows with UI and artifact model enhancements. Key value includes end-to-end tracing, measurable performance observability, and more secure, configurable builds. Strengthened documentation and configuration to reduce onboarding friction, and introduced architecture and runtime safety improvements to stabilize deployments across environments.

December 2025

20 Commits • 6 Features

Dec 1, 2025

December 2025 monthly summary: Delivered impactful registry enhancements across artifact reference management, observability, security, data processing, and CI reliability. Key features include: (1) Artifact references graph and validation with circular-reference integrity, improved dereferencing, header-based schema retrieval, and strengthened error handling (including fixes to related bugs); (2) New registry dashboard and version comparison UI for improved visibility and artifact-version decision-making; (3) MCP server security enhancements with OAuth2 authentication and TLS/MTLS support plus CORS configuration documentation; (4) Kafka SQL processing optimizations with single-partition total ordering and lazy bean lifecycle for better startup/shutdown efficiency; (5) Serialization/Deserialization performance improvements with schema/validation caching and optimized processing for Avro, JSON Schema, and Protobuf. Overall impact: increased data integrity, faster decision-making, stronger security, and reduced runtime and CI overhead. Technologies demonstrated include graph-based referencing, OAuth2/TLS, Quarkus 3.27 fast-jar, lazy bean lifecycle, and enhanced serdes caching.

November 2025

4 Commits • 3 Features

Nov 1, 2025

November 2025: Delivered focused, high-value improvements across test infrastructure, security, and schema evolution for the Apicurio Registry. Strengthened release confidence by expanding end-to-end testing, hardening CI reliability, and validating critical data formats.

October 2025

1 Commits • 1 Features

Oct 1, 2025

Month: 2025-10 — Focused on delivering network-accessibility improvements for enterprise deployments in Apicurio Registry. Key features delivered this month include HTTP/HTTPS proxy support for the client, enabling connections through proxy servers and ensuring compatibility with serializers/deserializers. This work reduces deployment friction in restricted networks and broadens the set of supported environments for customers.

May 2025

3 Commits • 2 Features

May 1, 2025

May 2025 monthly summary for Apicurio/apicurio-registry focusing on key features delivered, major bug fixes, overall impact, and technologies demonstrated. Key achievements (top highlights): - Implemented Registry URL Credential Parsing with tests to verify credential extraction and omission from returned URLs. (Commit: c33e2fccc0a96a66d81c012b9e5cf73a7ced7b67) - Added Proto3 Forward-Compatibility Checks to ensure adding new fields does not break existing clients, with validating tests. (Commit: ef5065db4f236f2688299aab3fb81805e66b97a2) - Fixed Proto3 Map Serialization Compatibility Bug in the protobuf compatibility checker, with tests validating correct map handling. (Commit: a5a67875d04cb75f2ae3f3775aa03dd97fb7e0a4) Major bugs fixed: - Proto3 Map Serialization Compatibility Bug: corrected handling of map<string, string> in the compatibility checker, preventing false incompatibilities and ensuring stable schema evolution. Overall impact and accomplishments: - Strengthened security and configurability by enabling credential extraction from registry URLs while ensuring credentials are not exposed in returned URLs. - Improved schema evolution safety for proto3 by adding forward-compatibility checks and accompanying test coverage, reducing risk for downstream clients. - Increased test coverage and quality, leading to more reliable deployments and easier maintenance. Technologies/skills demonstrated: - Java-based service configuration, Protobuf proto3 handling, unit/integration testing, test-driven development, and commit-driven development with clear traceability to changes.

April 2025

7 Commits • 4 Features

Apr 1, 2025

April 2025: Focused on security posture, baseline infra improvements, data path safety, and robust schema handling with expanded test coverage. Delivered features across OS/Quarkus upgrade, MySQL test image improvements, Protobuf validation robustness, Avro unions and compatibility checks, and reliability hardening in the registry and JSON converter.

March 2025

3 Commits • 2 Features

Mar 1, 2025

March 2025 monthly summary for Apicurio Registry (Apicurio/apicurio-registry). Focused on security hardening, Kubernetes readiness, and API compatibility improvements. Delivered TLS/HTTPS readiness with Kubernetes secret-based keystore/truststore management and network/service configuration updates; added OAuth-based authentication for KafkaSQL storage with TLS verification, accompanied by tests and examples. Refactored the ccompat API to remove unused DTOs and align resource implementations with Confluent Schema Registry behavior, simplifying internal bean structures. These changes enhance security, reliability, and interoperability, enabling secure deployments and smoother downstream integrations, with clear business value in reduced risk and faster time-to-value.

February 2025

2 Commits • 1 Features

Feb 1, 2025

February 2025: Delivered Unified User Authentication and Authorization System for UI and Operator in Apicurio Registry. Implemented configurable OIDC scope for UI authentication and comprehensive authn/authz in the registry operator, including environment variables for OIDC, TLS verification, and basic authentication, RBAC/administrative overrides, helper classes for security configuration, and accompanying unit tests. This work strengthens security posture, simplifies access control, and prepares the platform for scalable, policy-driven access across UI and operator.

January 2025

5 Commits • 3 Features

Jan 1, 2025

January 2025 — Apicurio Registry: Delivered targeted feature work and stability improvements across core components. Achievements include Slack notification optimization to reduce noise, Vert.x and Quarkus stability enhancements, owner-based artifact authorization, and configurable replica counts for components. These changes improve observability, security/auditability, deployment scalability, and operational efficiency, with tests updated to Keycloak for reproducibility and a cleaner codebase by removing redundant utilities.

November 2024

10 Commits • 4 Features

Nov 1, 2024

November 2024 monthly summary for Apicurio/apicurio-registry: focused on stability, maintainability, and business value. Delivered robustness in JSON Schema dereferencing with tests and Maven plugin correctness; corrected event payload logging for artifact version state changes; upgraded Quarkus to 3.15 and improved transaction handling; removed unused dependencies to simplify builds and reduce attack surface; advanced project modularity with registry repository refactor and dynamic configuration sources; and aligned documentation for Azure OIDC configuration keys. These changes reduce risk, improve reliability, and accelerate future evolution.

Activity

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Quality Metrics

Correctness95.0%
Maintainability86.2%
Architecture91.0%
Performance84.0%
AI Usage28.0%

Skills & Technologies

Programming Languages

AsciiDocBashCSSDockerfileGoHTMLJSONJavaJavaScriptKotlin

Technical Skills

AI/ML integrationAPI DesignAPI DevelopmentAPI IntegrationAPI TestingAPI designAPI developmentAPI securityAuthenticationAuthorizationAvroBackend DevelopmentCI/CDCORS configurationCloud Infrastructure

Repositories Contributed To

3 repos

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

Apicurio/apicurio-registry

Nov 2024 Apr 2026
13 Months active

Languages Used

AsciiDocJavaadocYAMLDockerfileKotlinShellCSS

Technical Skills

API IntegrationAPI TestingBackend DevelopmentCI/CDCode RefactoringConfiguration Management

k-wall/kroxylicious

Mar 2026 Apr 2026
2 Months active

Languages Used

JavaXML

Technical Skills

API IntegrationDependency ManagementDocumentationIntegration TestingJavaJava Development

quarkusio/quarkus

Mar 2026 May 2026
2 Months active

Languages Used

Java

Technical Skills

API developmentJavabackend developmentJSON handlingunit testing