EXCEEDS logo
Exceeds
stefan

PROFILE

Stefan

Stefan developed and enhanced authentication workflows for Kia and Hyundai vehicle integrations in the evcc-io/evcc repository over a three-month period. He transitioned the authentication system from password-based to refresh-token-based flows, improving both security and reliability for end users. His work involved updating API endpoints, refining error handling, and ensuring compatibility across regional configurations, particularly for the Hyundai EU region. Stefan utilized Go, YAML, and OAuth2 to implement robust backend solutions, updated configuration management, and revised user documentation. The depth of his contributions addressed real-world connectivity challenges, reduced credential exposure, and delivered a more stable onboarding experience for vehicle owners.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

7Total
Bugs
0
Commits
7
Features
3
Lines of code
1,067
Activity Months3

Work History

October 2025

2 Commits • 1 Features

Oct 1, 2025

Concise monthly summary for 2025-10: Delivered Hyundai/Kia Refresh Token Authentication Upgrade in evcc, replacing password-based auth with a refresh-token flow to enhance security and maintain uninterrupted connectivity. Implemented token refresh reliability improvements, updated configuration, and new user documentation to reflect the refresh-token process. Addressed token refresh issues through targeted commits to ensure robust operation under real-world vehicle connectivity scenarios. Overall, the work strengthens security, reduces credential exposure, and improves reliability for Hyundai/Kia integrations.

September 2025

2 Commits • 1 Features

Sep 1, 2025

September 2025: Implemented Kia Vehicle Authentication Revamp with a refresh-token-based flow, improving login reliability and security. Updated token handling (token-based password behavior) and refreshed user-agent strings. Resolved an auth issue in Kia EU integration, stabilizing the login flow. Overall, enhanced security, reliability, and scalability for Kia integration in evcc.

August 2025

3 Commits • 1 Features

Aug 1, 2025

Monthly summary for 2025-08: Authentication improvements for Kia & Hyundai in evcc-io/evcc. Delivered a unified login workflow with updated endpoints/parameters, enhanced error handling, and stabilized Hyundai EU region login by reverting the API change. These changes improve reliability, reduce login failures, and streamline onboarding for vehicle owners.

Activity

Loading activity data...

Quality Metrics

Correctness84.4%
Maintainability80.0%
Architecture80.0%
Performance71.4%
AI Usage22.8%

Skills & Technologies

Programming Languages

GoHTMLYAML

Technical Skills

API IntegrationAuthenticationBackend DevelopmentConfiguration ManagementOAuth2

Repositories Contributed To

1 repo

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

evcc-io/evcc

Aug 2025 Oct 2025
3 Months active

Languages Used

GoHTMLYAML

Technical Skills

API IntegrationAuthenticationBackend DevelopmentConfiguration ManagementOAuth2