spruceid/sprucekit-mobile
Feb 2026 – Apr 2026
2 Months active
Languages Used
RustKotlinSwift
Technical Skills
Rustbackend developmentAPI designAPI integrationAndroid developmentFlutter
Duncan Lutz
PROFILE
Duncan Lutz
Worked on spruceid/sprucekit-mobile, delivering two major cross-platform features and a critical bug fix over two months. Developed compatibility facades for OID4VC and enhanced OID4VP protocol support, enabling seamless verifiable credential and mobile driver’s license handling across Android, iOS, and Flutter. Addressed a key issue in credential JWT serialization by ensuring payloads are correctly represented as raw byte arrays, improving security and reliability. Emphasized robust test coverage and backward compatibility, collaborating closely with peers to validate multi-mode behavior. Utilized Rust, Swift, and Kotlin, applying skills in API design, asynchronous programming, and backend development to strengthen mobile SDK interoperability.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
2
Lines of code
155,181
Activity Months2
Your Network
26 peopleWork History
April 2026
3 Commits • 2 Features
Apr 1, 20262026-04: Delivered two major cross-platform compatibility initiatives in sprucekit-mobile, expanding verifiable credential and mobile driver’s license support across Android, iOS, and Flutter. Key features: OID4VC Compatibility Facades Across Mobile Platforms; OID4VP Compatibility Enhancements including legacy and ISO 18013-7 support. No critical bugs reported; focus was on stability of compatibility layers and test coverage. Impact: broader platform reach, smoother customer integrations, and a solid foundation for future protocol updates. Technologies/skills: cross-platform mobile SDK development, facade and version/configuration design, testing, and cross-team collaboration.
3 Commits • 2 Features
Apr 1, 20262026-04: Delivered two major cross-platform compatibility initiatives in sprucekit-mobile, expanding verifiable credential and mobile driver’s license support across Android, iOS, and Flutter. Key features: OID4VC Compatibility Facades Across Mobile Platforms; OID4VP Compatibility Enhancements including legacy and ISO 18013-7 support. No critical bugs reported; focus was on stability of compatibility layers and test coverage. Impact: broader platform reach, smoother customer integrations, and a solid foundation for future protocol updates. Technologies/skills: cross-platform mobile SDK development, facade and version/configuration design, testing, and cross-team collaboration.
April 2026
February 2026
1 Commits
Feb 1, 2026February 2026 monthly recap for sprucekit-mobile: Delivered a critical fix to Credential JWT Serialization, ensuring JWT payloads are not double-encoded and are correctly represented as raw byte arrays. Added tests validating serialization across credential formats to improve reliability and interoperability with downstream services. This work, co-authored with Ryan Tate (PR #277), reduces production incidents and strengthens credential processing security. Technologies demonstrated include JWT handling, serialization logic, test-driven development, and effective collaboration.
February 2026
1 Commits
Feb 1, 2026February 2026 monthly recap for sprucekit-mobile: Delivered a critical fix to Credential JWT Serialization, ensuring JWT payloads are not double-encoded and are correctly represented as raw byte arrays. Added tests validating serialization across credential formats to improve reliability and interoperability with downstream services. This work, co-authored with Ryan Tate (PR #277), reduces production incidents and strengthens credential processing security. Technologies demonstrated include JWT handling, serialization logic, test-driven development, and effective collaboration.
Activity
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Quality Metrics
Correctness85.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage40.0%
Skills & Technologies
Programming Languages
KotlinRustSwift
Technical Skills
API designAPI integrationAndroid developmentFlutterRustRust programmingSwiftasynchronous programmingbackend developmentiOS developmentmobile development
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