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Marcin Dobrowolski

PROFILE

Marcin Dobrowolski

Worked on the NangoHQ/nango and NangoHQ/integration-templates repositories, delivering features that improved security, developer experience, and integration workflows. Over four months, built and overhauled webhook signature verification using HMAC-SHA256, revamped the environment settings UI with React and Tailwind CSS, and expanded API rate limit controls with TypeScript and Zod. Enhanced backend reliability by introducing tagging systems, database migrations, and CLI tooling for integration templates. Improved testing infrastructure with in-memory mocks and unified integration functions for Google and Slack APIs. Addressed security vulnerabilities through dependency updates and refined documentation, ensuring scalable, maintainable, and secure API and integration development practices.

Overall Statistics

Feature vs Bugs

84%Features

Repository Contributions

32Total
Bugs
3
Commits
32
Features
16
Lines of code
390,157
Activity Months4

Work History

March 2026

5 Commits • 3 Features

Mar 1, 2026

March 2026: Implemented robust testing infrastructure and expanded cross-product integration capabilities. Key outcomes include enhanced NangoSyncMock with in-memory checkpoint storage and per-test isolation, a fix to the unified mock system for body-less requests, and the rollout of a unified function set across Google Calendar, Drive, Sheets, Slack, and HubSpot. Also improved HubSpot synchronization and removed unnecessary checkpoint logic in Google Calendar, with broader test coverage and adherence to integration best practices. These changes reduced flaky tests, improved testing reliability, and accelerated onboarding of new integrations, delivering tangible business value.

February 2026

10 Commits • 3 Features

Feb 1, 2026

February 2026 performance summary for NangoHQ/nango. Key delivery focused on enhanced tagging capabilities, UI reliability on ultrawide screens, security posture, and customer guidance. These efforts improved data governance, developer experience, and security posture while clarifying operational limits.

January 2026

8 Commits • 6 Features

Jan 1, 2026

January 2026 (2026-01) performance overview for NangoHQ/nango. Delivered a set of UX improvements, backend capacity enhancements, and developer tooling that collectively improve onboarding, configurability, and platform scalability. Key work focused on: (1) Environment Settings UI overhaul delivering a responsive, design-aligned settings page with a new button component and refined spacing; (2) Save button accessibility fixed in the Connect UI to ensure consistent UX across all plans; (3) API environment variable size expansion with a backend constraint fix, schema migration, and accompanying tests to validate the new limits; (4) CLI enhancement introducing a nango clone command to streamline integration-template-based project setup; (5) Tagging system for connections and sessions, including DB schema additions, UI support, validation, and a data-length upgrade to support longer tag values; (6) Documentation and integration guidance updates to reflect integration templates and provide a practical customization guide. These changes drive faster project bootstrap, more flexible configurations, improved data modeling, and a more reliable, scalable developer experience.

December 2025

9 Commits • 4 Features

Dec 1, 2025

December 2025 monthly summary focusing on key accomplishments, business value, and technical achievements. This month’s work concentrates on security, reliability, and developer experience across the Nango platform, with a clear emphasis on enterprise integration readiness and safer webhook handling. Key features delivered, major bugs fixed, and their business impact are summarized below:

Activity

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Quality Metrics

Correctness98.2%
Maintainability88.2%
Architecture92.6%
Performance88.2%
AI Usage25.0%

Skills & Technologies

Programming Languages

CSSGoJSONJavaJavaScriptMarkdownPHPPythonRubyRust

Technical Skills

API DevelopmentAPI IntegrationAPI designAPI developmentAPI integrationBackend DevelopmentCLI DevelopmentCSSGitHub API IntegrationHMACJavaScriptKnex.jsNode.jsReactSQL

Repositories Contributed To

2 repos

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

NangoHQ/nango

Dec 2025 Mar 2026
4 Months active

Languages Used

CSSGoJavaJavaScriptMarkdownPHPPythonRuby

Technical Skills

API developmentCSSHMACJavaScriptReactTailwind CSS

NangoHQ/integration-templates

Mar 2026 Mar 2026
1 Month active

Languages Used

JSONTypeScript

Technical Skills

API IntegrationBackend DevelopmentJavaScriptNode.jsTestingTypeScript