corda/corda
Nov 2024 – Mar 2026
9 Months active
Languages Used
GradleJavaKotlinShellDockerfilePropertiespropertiesGroovy
Technical Skills
Build ConfigurationDependency ManagementAzure SDKBuild ToolsCloud InfrastructureContainerization
Jakub Zadroga
PROFILE
Jakub Zadroga
Over nine months, contributed to the corda/corda repository by building and modernizing backend infrastructure, focusing on authentication security, CI/CD automation, and deployment reliability. Delivered features such as RPC authentication rate limiting, Azure SDK upgrades, and Docker-based deployment enhancements, using Kotlin, Java, and Gradle. Improved test reliability with JUnit 5 integration and enhanced configuration management for RPC clients. Established CI/CD pipelines with Dockerfile and Jenkinsfile, and refreshed documentation to support developer onboarding. Addressed technical debt by refactoring authentication flows and removing deprecated dependencies, resulting in a more secure, maintainable, and cloud-ready backend aligned with evolving business and compliance needs.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
19Total
Bugs
2
Commits
19
Features
11
Lines of code
405,068
Activity Months9
Your Network
32 peopleSame Organization
@r3.com16
Work History
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026: No major bugs fixed; focused on establishing CI/CD infrastructure and updating docs for corda/corda. Delivered Dockerfile for CI environment, Jenkinsfile for static code analysis, and refreshed README/API docs to improve API stability and developer onboarding. These changes lay the groundwork for automated quality gates and faster feedback.
1 Commits • 1 Features
Mar 1, 2026March 2026: No major bugs fixed; focused on establishing CI/CD infrastructure and updating docs for corda/corda. Delivered Dockerfile for CI environment, Jenkinsfile for static code analysis, and refreshed README/API docs to improve API stability and developer onboarding. These changes lay the groundwork for automated quality gates and faster feedback.
March 2026
February 2026
5 Commits • 2 Features
Feb 1, 2026February 2026 (2026-02) – CordA CordA monthly summary highlighting key business value and technical delivery in the corda/corda repo. Key features delivered: - User Authentication Rate Limiting and Backoff: Implemented rate-limiting and backoff to suspend users and IPs after repeated authentication failures; includes RPC-specific rate limiting and accompanying tests. Commits span: 6795c7853efa931a7e47c02bb53114174196cb99; a81fbff9efc5289c152892a897bd0d9e862728f2; 52d47a584e4378b4026a25032d55fb0ed7d40246. - Authentication System Refactor: Remove Rate Limiting Security Manager: Resolved conflicts in authentication database tests and removed the rate-limiting security manager to improve login security and permissions management. Commit: 15cb07665a519225001e7d6dbff3bdbd7ed10372. Major bugs fixed: - Rate-limiting backoff logic fixes across the authentication flow: catch and throw the auth exception after all rate-limiting checks completed; ensure backoff applies after failed attempts. Associated commits include ENT-14787 and ENT-14789 work; tests moved to AuthDBTests and validated with local CORDa binary via CRAFT tests (ea4e9ade0a8fa8760934c45209e1a1a09b8cf7e6). - Improved test coverage and stability by relocating tests to AuthDBTests and enhancing test scenarios to reliably exercise rate-limiting paths. Overall impact and accomplishments: - Strengthened security posture by removing redundant rate-limiting security manager and hardening login flow; rate-limiting reduces credential stuffing risk and gives controlled backoff to repeated failures. - Increased reliability of authentication with RPC-aware rate limits and validated with CRAFT-based end-to-end tests; tests reorganized for maintainability. - Improved maintainability and clarity of authentication code paths, enabling easier future enhancements and audits. Technologies/skills demonstrated: - Java/Kotlin-based security components, custom security manager adjustments, and rate-limiting/backoff strategies. - Test strategy, including AuthDBTests migration and CRAFT test validation. - Conflict resolution and code hygiene during refactors. Business value: - Reduced risk of automated attacks, improved user/login experience through controlled throttle behavior, and a clearer, more maintainable authentication subsystem aligned with release readiness.
February 2026
5 Commits • 2 Features
Feb 1, 2026February 2026 (2026-02) – CordA CordA monthly summary highlighting key business value and technical delivery in the corda/corda repo. Key features delivered: - User Authentication Rate Limiting and Backoff: Implemented rate-limiting and backoff to suspend users and IPs after repeated authentication failures; includes RPC-specific rate limiting and accompanying tests. Commits span: 6795c7853efa931a7e47c02bb53114174196cb99; a81fbff9efc5289c152892a897bd0d9e862728f2; 52d47a584e4378b4026a25032d55fb0ed7d40246. - Authentication System Refactor: Remove Rate Limiting Security Manager: Resolved conflicts in authentication database tests and removed the rate-limiting security manager to improve login security and permissions management. Commit: 15cb07665a519225001e7d6dbff3bdbd7ed10372. Major bugs fixed: - Rate-limiting backoff logic fixes across the authentication flow: catch and throw the auth exception after all rate-limiting checks completed; ensure backoff applies after failed attempts. Associated commits include ENT-14787 and ENT-14789 work; tests moved to AuthDBTests and validated with local CORDa binary via CRAFT tests (ea4e9ade0a8fa8760934c45209e1a1a09b8cf7e6). - Improved test coverage and stability by relocating tests to AuthDBTests and enhancing test scenarios to reliably exercise rate-limiting paths. Overall impact and accomplishments: - Strengthened security posture by removing redundant rate-limiting security manager and hardening login flow; rate-limiting reduces credential stuffing risk and gives controlled backoff to repeated failures. - Increased reliability of authentication with RPC-aware rate limits and validated with CRAFT-based end-to-end tests; tests reorganized for maintainability. - Improved maintainability and clarity of authentication code paths, enabling easier future enhancements and audits. Technologies/skills demonstrated: - Java/Kotlin-based security components, custom security manager adjustments, and rate-limiting/backoff strategies. - Test strategy, including AuthDBTests migration and CRAFT test validation. - Conflict resolution and code hygiene during refactors. Business value: - Reduced risk of automated attacks, improved user/login experience through controlled throttle behavior, and a clearer, more maintainable authentication subsystem aligned with release readiness.
January 2026
2 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — Cord a/corda delivered security-focused improvements and test reliability enhancements, contributing to a stronger authentication posture and more accurate RPC error reporting. The work strengthens defense against brute-force attacks, improves security observability, and lays groundwork for ongoing hardening efforts.
2 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — Cord a/corda delivered security-focused improvements and test reliability enhancements, contributing to a stronger authentication posture and more accurate RPC error reporting. The work strengthens defense against brute-force attacks, improves security observability, and lays groundwork for ongoing hardening efforts.
January 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for corda/corda: Focused on security hardening and reliability improvements. Key feature delivered: RPC authentication rate limiting. The feature implements exponential backoff and allows configurable parameters (base delay, maximum delay, expiry) via code and node.conf, with default behavior unchanged if not enabled. The commit 4daad7bb9002be233e40c61dfbb09b144999f914 implements ENT-14161 and delivers the rate-limiting capability with clear documentation and changelog considerations. No major bug fixes were reported this month. Overall impact includes reduced exposure to brute-force attacks, improved node availability, and easier operational control through configuration. Technologies demonstrated include secure design, back-end Java/Kotlin code changes, feature flag-like configurability, and adherence to release-process guidelines.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for corda/corda: Focused on security hardening and reliability improvements. Key feature delivered: RPC authentication rate limiting. The feature implements exponential backoff and allows configurable parameters (base delay, maximum delay, expiry) via code and node.conf, with default behavior unchanged if not enabled. The commit 4daad7bb9002be233e40c61dfbb09b144999f914 implements ENT-14161 and delivers the rate-limiting capability with clear documentation and changelog considerations. No major bug fixes were reported this month. Overall impact includes reduced exposure to brute-force attacks, improved node availability, and easier operational control through configuration. Technologies demonstrated include secure design, back-end Java/Kotlin code changes, feature flag-like configurability, and adherence to release-process guidelines.
October 2025
2 Commits • 2 Features
Oct 1, 2025October 2025: Delivered two core improvements in corda/corda that strengthen test reliability and runtime configurability, delivering measurable business value through more robust tests and flexible client resource management.
2 Commits • 2 Features
Oct 1, 2025October 2025: Delivered two core improvements in corda/corda that strengthen test reliability and runtime configurability, delivering measurable business value through more robust tests and flexible client resource management.
October 2025
September 2025
5 Commits • 2 Features
Sep 1, 2025September 2025 highlights: Upgraded and stabilized the corda/corda network deployment pipeline with targeted Corda version upgrades, Docker integration, and backend/logging cleanup to improve reliability, observability, and maintenance burden. Business value realized through smoother upgrades, consistent deployments, and reduced incident risk across CI/CD workflows.
September 2025
5 Commits • 2 Features
Sep 1, 2025September 2025 highlights: Upgraded and stabilized the corda/corda network deployment pipeline with targeted Corda version upgrades, Docker integration, and backend/logging cleanup to improve reliability, observability, and maintenance burden. Business value realized through smoother upgrades, consistent deployments, and reduced incident risk across CI/CD workflows.
August 2025
1 Commits • 1 Features
Aug 1, 20252025-08 Monthly Summary: Network Builder modernization completed through upgrading the authentication stack and library dependencies to Azure SDKs, replacing the deprecated MS ADAL library. This work resolved startup instability and obsolescence concerns, ensuring network provisioning remains reliable via both CLI and GUI.
1 Commits • 1 Features
Aug 1, 20252025-08 Monthly Summary: Network Builder modernization completed through upgrading the authentication stack and library dependencies to Azure SDKs, replacing the deprecated MS ADAL library. This work resolved startup instability and obsolescence concerns, ensuring network provisioning remains reliable via both CLI and GUI.
August 2025
July 2025
1 Commits
Jul 1, 2025Performance summary for 2025-07: Focused on stabilizing Network Builder provisioning in corda/corda by upgrading the Azure SDK stack and removing deprecated dependencies. The work improved startup reliability and ensured nodes are provisioned and started correctly via the CLI, delivering concrete business value through more predictable deployments and reduced maintenance risk.
July 2025
1 Commits
Jul 1, 2025Performance summary for 2025-07: Focused on stabilizing Network Builder provisioning in corda/corda by upgrading the Azure SDK stack and removing deprecated dependencies. The work improved startup reliability and ensured nodes are provisioned and started correctly via the CLI, delivering concrete business value through more predictable deployments and reduced maintenance risk.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024: Implemented a unified cryptographic foundation by adding the bcutil-lts8on dependency (Bouncy Castle) across multiple Gradle builds in the corda/corda repository. This enables stronger cryptographic primitives, improves security posture, and paves the way for future BC upgrades and compliance, with centralized crypto management across modules.
1 Commits • 1 Features
Nov 1, 2024November 2024: Implemented a unified cryptographic foundation by adding the bcutil-lts8on dependency (Bouncy Castle) across multiple Gradle builds in the corda/corda repository. This enables stronger cryptographic primitives, improves security posture, and paves the way for future BC upgrades and compliance, with centralized crypto management across modules.
November 2024
Activity
Loading activity data...
Quality Metrics
Correctness89.4%
Maintainability84.2%
Architecture84.2%
Performance77.8%
AI Usage22.2%
Skills & Technologies
Programming Languages
DockerfileGradleGroovyJavaKotlinMarkdownPropertiesShellproperties
Technical Skills
AzureAzure SDKBackend DevelopmentBuild AutomationBuild ConfigurationBuild ToolsCI/CDCloud ComputingCloud InfrastructureConcurrencyConfiguration ManagementContainerizationDependency ManagementDevOpsDocumentation
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline