Orange-OpenSource/waltid-identity
Oct 2024 – May 2025
7 Months active
Languages Used
JavaKotlinGradleJSONMarkdownN/AYAMLTypeScript
Technical Skills
API DevelopmentBackend DevelopmentCryptographyDIDDistributed SystemsFull Stack Development
Severin Stampler
PROFILE
Severin Stampler
Contributed to the Orange-OpenSource/waltid-identity platform by building and refining core digital identity features, including credential issuance, selective disclosure, and audit event centralization. Leveraged Kotlin and Java to implement W3C JWT, SD-JWT, and mDoc credential flows, focusing on interoperability with OpenID Connect and robust cryptographic handling. Enhanced backend reliability through comprehensive test automation, improved error diagnostics, and expanded certificate management. Refactored code for maintainability, centralized event models for auditability, and improved developer experience with updated documentation. Addressed critical bugs and streamlined data modeling, ensuring stable integrations and compliance readiness across distributed systems and verifiable credential workflows in production environments.
Overall Statistics
Feature vs Bugs
61%Features
Repository Contributions
53Total
Bugs
12
Commits
53
Features
19
Lines of code
5,536
Activity Months7
Your Network
12 peopleSame Organization
@walt.id4
Shared Repositories
8
Work History
May 2025
4 Commits • 2 Features
May 1, 2025May 2025 monthly summary for Orange-OpenSource/waltid-identity focused on stabilizing the test suite, expanding test coverage for certificate and presentation flows, and improving troubleshooting capabilities in the verification path. Delivered targeted updates to test infrastructure and fixed a certificate-related bug impacting LSP issuer handling, contributing to more reliable CI and faster issue resolution.
4 Commits • 2 Features
May 1, 2025May 2025 monthly summary for Orange-OpenSource/waltid-identity focused on stabilizing the test suite, expanding test coverage for certificate and presentation flows, and improving troubleshooting capabilities in the verification path. Delivered targeted updates to test infrastructure and fixed a certificate-related bug impacting LSP issuer handling, contributing to more reliable CI and faster issue resolution.
May 2025
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 Monthly Summary for Orange-OpenSource/waltid-identity: Delivered MDOC parsing support and UI JSON representation for mobile documents, enabling validation and UI-ready data extraction from CBOR and hex strings. This work lays foundation for improved interoperability and user-facing data presentation in identity workflows.
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 Monthly Summary for Orange-OpenSource/waltid-identity: Delivered MDOC parsing support and UI JSON representation for mobile documents, enabling validation and UI-ready data extraction from CBOR and hex strings. This work lays foundation for improved interoperability and user-facing data presentation in identity workflows.
March 2025
5 Commits • 3 Features
Mar 1, 2025March 2025 monthly summary for Orange-OpenSource/waltid-identity. Focused on delivering core platform upgrades, interoperability enhancements, and data governance improvements that drive business value and reduce integration risk.
5 Commits • 3 Features
Mar 1, 2025March 2025 monthly summary for Orange-OpenSource/waltid-identity. Focused on delivering core platform upgrades, interoperability enhancements, and data governance improvements that drive business value and reduce integration risk.
March 2025
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for Orange-OpenSource/waltid-identity with a focused emphasis on audit event data model migration and centralization. Delivered consolidation of audit event models into the main codebase, introducing a unified Event base class and updated EventType definitions, and reorganized packages to centralize event handling. Achieved consistent serialization and filtering across event types (DIDEvent, IssuanceEvent, KeyEvent, VerificationEvent). Applied infrastructure updates to Docker Compose and Gradle to support the new structures. Progressed serialization fixes and sealed-class refinements as part of the migration, establishing a stronger foundation for auditability, observability, and downstream analytics. Overall, the work improves data consistency, reduces maintenance burden, and enhances compliance readiness.
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for Orange-OpenSource/waltid-identity with a focused emphasis on audit event data model migration and centralization. Delivered consolidation of audit event models into the main codebase, introducing a unified Event base class and updated EventType definitions, and reorganized packages to centralize event handling. Achieved consistent serialization and filtering across event types (DIDEvent, IssuanceEvent, KeyEvent, VerificationEvent). Applied infrastructure updates to Docker Compose and Gradle to support the new structures. Progressed serialization fixes and sealed-class refinements as part of the migration, establishing a stronger foundation for auditability, observability, and downstream analytics. Overall, the work improves data consistency, reduces maintenance burden, and enhances compliance readiness.
December 2024
7 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for Orange-OpenSource/waltid-identity focusing on reliability, test coverage, and external integrations. The team delivered a high-value feature enhancement around credential matching, and closed a set of critical bugs that improved issuance workflow, metadata access, and OpenID4VC support. The combined effort strengthened platform stability, reduced risk in production deployments, and demonstrated solid end-to-end testing and security validation.
7 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for Orange-OpenSource/waltid-identity focusing on reliability, test coverage, and external integrations. The team delivered a high-value feature enhancement around credential matching, and closed a set of critical bugs that improved issuance workflow, metadata access, and OpenID4VC support. The combined effort strengthened platform stability, reduced risk in production deployments, and demonstrated solid end-to-end testing and security validation.
December 2024
November 2024
30 Commits • 10 Features
Nov 1, 2024November 2024 (Orange-OpenSource/waltid-identity): Stabilized and advanced the OpenID4VCI issuance workflow, improved developer experience through documentation, and strengthened security and interoperability by fixing critical JWT issuance bugs. Key investments included refactoring issuance/session handling, enabling configurable issuer values, comprehensive pre-auth and utility documentation, and targeted bug fixes across JWT-vc, sd-jwt, and SD checks. Result: smoother onboarding, fewer edge-case issues, and a more maintainable codebase.
November 2024
30 Commits • 10 Features
Nov 1, 2024November 2024 (Orange-OpenSource/waltid-identity): Stabilized and advanced the OpenID4VCI issuance workflow, improved developer experience through documentation, and strengthened security and interoperability by fixing critical JWT issuance bugs. Key investments included refactoring issuance/session handling, enabling configurable issuer values, comprehensive pre-auth and utility documentation, and targeted bug fixes across JWT-vc, sd-jwt, and SD checks. Result: smoother onboarding, fewer edge-case issues, and a more maintainable codebase.
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024 — Delivered a refactored and test-covered OpenID4VCI credential issuance feature for the WaltID Identity service, introducing W3C JWT and SD-JWT credentials with selective disclosure capabilities. Refactored credential generation logic into a reusable service function and expanded tests to validate selective disclosure of nested W3C credential subject properties. This work enhances interoperability with OpenID Connect flows, improves maintainability, and strengthens privacy guarantees for issuers and relying parties.
2 Commits • 1 Features
Oct 1, 2024October 2024 — Delivered a refactored and test-covered OpenID4VCI credential issuance feature for the WaltID Identity service, introducing W3C JWT and SD-JWT credentials with selective disclosure capabilities. Refactored credential generation logic into a reusable service function and expanded tests to validate selective disclosure of nested W3C credential subject properties. This work enhances interoperability with OpenID Connect flows, improves maintainability, and strengthens privacy guarantees for issuers and relying parties.
October 2024
Activity
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Quality Metrics
Correctness88.4%
Maintainability88.2%
Architecture85.2%
Performance80.8%
AI Usage20.4%
Skills & Technologies
Programming Languages
GradleJSONJavaKotlinMarkdownN/ATypeScriptYAML
Technical Skills
API DesignAPI DevelopmentAPI IntegrationBackend DevelopmentBuild ConfigurationCBORCertificate ManagementCode OrganizationCode RefactoringCryptographyDIDDID (Decentralized Identifiers)DID ResolutionDID/VCData Modeling
Repositories Contributed To
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