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Sergio Gutiérrez

PROFILE

Sergio Gutiérrez

Over six months, this developer contributed to internxt/drive-server-wip and internxt/drive-web, focusing on backend feature delivery, security, and maintainability. They implemented scalable authentication key management, integrated Brevo email services, and introduced robust rate-limiting and throttling systems using NestJS and TypeScript. Their work included optimizing PostgreSQL queries with new indexes, enhancing observability through improved logging, and enforcing security best practices such as CAPTCHA validation and JWT-based identification. By refactoring legacy code, streamlining configuration management, and automating npm releases, they improved deployment reliability and codebase cleanliness, demonstrating strong skills in backend development, API integration, and database optimization with JavaScript and SQL.

Overall Statistics

Feature vs Bugs

56%Features

Repository Contributions

63Total
Bugs
18
Commits
63
Features
23
Lines of code
3,929
Activity Months6

Your Network

23 people

Work History

February 2026

6 Commits • 3 Features

Feb 1, 2026

February 2026 performance summary for internxt/drive-server-wip. Delivered a throttling overhaul and related hardening to reduce abuse, improve observability, and simplify request handling. Key changes include global pre-auth throttling with IP-based identification, tightened refresh rate limits, and code cleanup to remove legacy throttling logic. This work enhances security, reliability, and maintainability while preserving user experience under normal load. Key deliveries: - Throttling overhaul: IP-based throttling and pre-authentication custom throttlers - Switched to cf-connecting-ip for accurate client IP, extended throttling to consider user ID and resolved IP, and applied custom throttlers globally before authentication using JWT-based user identification. - Refresh endpoint rate limiting tightened - Reduced allowed refresh requests on the user controller from 5 to 2 per 60 seconds and introduced a long-term limit of 5 requests per 30 minutes to curb abuse. - Throttle system cleanup and removal - Removed custom throttling mechanisms across the application and in file/folder controllers to simplify request handling and improve performance. Key commits (traceability): - 799b90b4a7885cada72b9f6d3e143fe9a72563b4: fix(throttler): use cf-connecting-ip instead of req.ip - 8ba2ce126b79f3f2b48bbbf318f6305f8a80ea0b: fix(throttler): use cf-connecting-ip instead of req.ip for custom throttlers also - b647e7f07a892282832987335cfeaf673e227056: fix(throttler): make custom throttlers global and apply them before reaching auth - 219a23bf848cf6aeee127274a8699f8cc3f8e69a: feat(users): harden refresh rate limit - 8702d4a95918e13ffecc37a300fc4ac439b66c0e: fix(throttler): remove mechanisms - ea4b0cd2c45d5310018066890b326b61d4b39338: fix(throttler): remove mechanisms 2

January 2026

43 Commits • 11 Features

Jan 1, 2026

January 2026 performance overview for internxt/drive-server-wip and internxt/drive-web. Focused on delivering flexible file query options, targeted performance optimizations, security and observability improvements, and maintainability enhancements. Key outcomes include the introduction of an optional lastId parameter for file queries with test coverage, a pagination rename in getFilesUpdatedAfter, and several index migrations (including a BRIN index) that significantly speed up listings. Major bug fixes corrected conditional lastId usage, cleaned up migrations and enhanced auth flow rate-limiting. Overall impact: faster, more scalable file/folder listings; reduced database load; stronger security posture; and a leaner, easier-to-maintain codebase. Technologies/skills demonstrated: PostgreSQL indexing and migrations, TypeScript refactoring, test coverage, APM instrumentation, interceptors and guards for global rate limiting, security guards (CAPTCHA), environment-driven config, and codebase cleanup with ts-prune.

August 2025

2 Commits • 1 Features

Aug 1, 2025

August 2025 (2025-08) — Enhanced observability for internxt/drive-server-wip by adding a fixed identifier to request logs and removing a noisy, non-functional debug log in the throttler guard. These changes improve log filtering and reduce noise, enabling faster root-cause analysis during incident response. The work was limited to middleware and guard components, with commits focused on instrumentation and code cleanliness, and no changes to external behavior.

January 2025

8 Commits • 5 Features

Jan 1, 2025

January 2025 performance summary for the drive platform. Delivered concrete features and fixes across internxt/drive-server-wip and internxt/drive-web, improving data integrity, key management capabilities, platform governance, and observability. Focused on scalable key handling, multi-key management, and security controls while maintaining clear ownership and accountability for critical components.

December 2024

2 Commits • 1 Features

Dec 1, 2024

December 2024 — internxt/drive-server-wip: Key features delivered include Brevo/Sendinblue email service integration and migration, with environment/config updates reflecting the new provider. Major bugs fixed: None documented this month. Overall impact: email subscription pipeline is now powered by Brevo, reducing reliance on MailerLite, enabling improved deliverability and future provider flexibility. Technologies/skills demonstrated: API integration with Brevo via sib-api-v3-sdk, dependency management, auth/subscription flow changes, environment/config management, and backend code maintenance.

November 2024

2 Commits • 2 Features

Nov 1, 2024

November 2024 monthly summary for internxt/sdk: Delivered targeted features focused on security and release reliability, with no major bugs reported this month. Impact includes simplified authentication key management, automated npm release workflow, and standardized versioning, enabling faster, safer deployments and easier future maintenance. Technologies/skills demonstrated include Node.js ecosystem, crypto key management (ECC and Kyber), GitHub Actions CI/CD, and npm publishing workflows.

Activity

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Quality Metrics

Correctness98.0%
Maintainability88.6%
Architecture89.6%
Performance90.8%
AI Usage20.2%

Skills & Technologies

Programming Languages

JavaScriptSCSSTypeScriptYAML

Technical Skills

API DevelopmentAPI IntegrationAPI designAPI developmentAPI integrationAuthenticationBackend DevelopmentCI/CDCode OwnershipConfiguration ManagementCryptographyDatabase ManagementDebuggingDependency ManagementDevOps

Repositories Contributed To

3 repos

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

internxt/drive-server-wip

Dec 2024 Feb 2026
5 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

API IntegrationBackend DevelopmentConfiguration ManagementDependency ManagementEmail Marketing IntegrationNode.js

internxt/drive-web

Jan 2025 Jan 2026
2 Months active

Languages Used

JavaScriptSCSSTypeScript

Technical Skills

Code OwnershipDevOpsReactTypeScriptfront end development

internxt/sdk

Nov 2024 Nov 2024
1 Month active

Languages Used

TypeScriptYAML

Technical Skills

AuthenticationCI/CDCryptographyGitHub ActionsRefactoringTypeScript