spruceid/sprucekit-mobile
Apr 2026 – Jun 2026
3 Months active
Languages Used
DartKotlinRustSwift
Technical Skills
Android developmentFlutterPDF generationbackend developmentiOS developmentmobile development
tjzhang-spruce
PROFILE
Tjzhang-spruce
Over a three-month period, contributed to spruceid/sprucekit-mobile by developing features for mobile credential management and verification. Delivered PDF export functionality for mobile credentials, enabling standardized sharing, and enhanced credential presentation workflows with SD-JWT VP scanning, AAMVA-compliant PDF generation, and selective disclosure. Implemented NFC-based ISO 18013-5 mDL reader with both NFC and QR engagement, and improved BLE reliability through retry logic and diagnostic logging. Refactored code to improve quality and maintainability, addressing linting requirements. Worked across Android and iOS platforms using Kotlin, Dart, and Rust, focusing on interoperability, secure data transmission, and robust barcode and NFC integration.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
8Total
Bugs
1
Commits
8
Features
4
Lines of code
12,773
Activity Months3
Your Network
26 peopleWork History
June 2026
5 Commits • 2 Features
Jun 1, 2026June 2026—SpruceKit Mobile (spruceid/sprucekit-mobile) monthly summary focusing on key accomplishments, major bugs fixed, and overall impact. Delivered notable features for credential verification, reliability improvements for BLE, and code quality enhancements, with measurable business value.
5 Commits • 2 Features
Jun 1, 2026June 2026—SpruceKit Mobile (spruceid/sprucekit-mobile) monthly summary focusing on key accomplishments, major bugs fixed, and overall impact. Delivered notable features for credential verification, reliability improvements for BLE, and code quality enhancements, with measurable business value.
June 2026
May 2026
2 Commits • 1 Features
May 1, 2026May 2026 monthly summary for sprucekit-mobile focusing on feature delivery and readiness for broader adoption. Delivered a major enhancement to credential presentation workflows by integrating real SD-JWT VP scanning and verification with AAMVA-compliant mDL PDF generation, and by strengthening barcode scanning and verification capabilities for high-density barcodes. Also added selective disclosure support for SD-JWT VP fields during scanning and enabled embedding issuer-signed Verifiable Credential Bindings (VCBs) into PDF-417 barcodes alongside mDL data. These changes were implemented through two feature commits and position the product for improved interoperability with issuers and enhanced mobile verification trust.
May 2026
2 Commits • 1 Features
May 1, 2026May 2026 monthly summary for sprucekit-mobile focusing on feature delivery and readiness for broader adoption. Delivered a major enhancement to credential presentation workflows by integrating real SD-JWT VP scanning and verification with AAMVA-compliant mDL PDF generation, and by strengthening barcode scanning and verification capabilities for high-density barcodes. Also added selective disclosure support for SD-JWT VP fields during scanning and enabled embedding issuer-signed Verifiable Credential Bindings (VCBs) into PDF-417 barcodes alongside mDL data. These changes were implemented through two feature commits and position the product for improved interoperability with issuers and enhanced mobile verification trust.
April 2026
1 Commits • 1 Features
Apr 1, 2026April 2026: SpruceKit Mobile — PDF export for mobile credentials (mDL/mDoc) delivered, enabling generation of a standardized PDF representation for export and sharing. Commit 5a54c1a64b74fe7c8034199ab833002a3a9405d5 (feat: generate credential PDF from mDL/mDoc (#298)) with co-authorship by Gregorio.
1 Commits • 1 Features
Apr 1, 2026April 2026: SpruceKit Mobile — PDF export for mobile credentials (mDL/mDoc) delivered, enabling generation of a standardized PDF representation for export and sharing. Commit 5a54c1a64b74fe7c8034199ab833002a3a9405d5 (feat: generate credential PDF from mDL/mDoc (#298)) with co-authorship by Gregorio.
April 2026
Activity
Loading activity data...
Quality Metrics
Correctness95.0%
Maintainability82.6%
Architecture90.0%
Performance82.6%
AI Usage37.6%
Skills & Technologies
Programming Languages
DartKotlinRustSwift
Technical Skills
Android developmentBluetooth CommunicationBluetooth Low Energy (BLE)Code RefactoringFlutterKotlinLintingMobile DevelopmentNFCNFC integrationPDF generationQR Code ProcessingRustRust programmingW3C standards
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline