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Leandro Pereira

PROFILE

Leandro Pereira

Worked on the supabase/realtime and phoenixframework/phoenix repositories to deliver secure, observable, and reliable real-time backend systems. Focused on tenant migration safety, per-tenant telemetry, and robust JWT authentication, the work included implementing asynchronous migrations, binary payload support, and detailed migration dashboards. Leveraged Elixir, PostgreSQL, and Docker to streamline local development, enforce security best practices, and improve CI/CD reliability. Enhanced documentation and configuration management to reduce onboarding friction and production risk. Addressed test flakiness and dependency management, while introducing granular access controls and observability features that improved system reliability, developer experience, and operational transparency across real-time messaging workflows.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

49Total
Bugs
11
Commits
49
Features
33
Lines of code
141,445
Activity Months4

Work History

June 2026

21 Commits • 14 Features

Jun 1, 2026

June 2026 monthly summary focusing on delivering observable, secure, and scalable real-time capabilities while improving deployment reliability across Realtime and CLI components. The work emphasized business value through enhanced observability, security hardening, robust messaging, and resilient release processes.

May 2026

23 Commits • 14 Features

May 1, 2026

May 2026 focused on stabilizing tenant migrations, enhancing observability, and strengthening security and CI infrastructure. Delivered safety improvements for tenant migrations, introduced metrics and region-aware telemetry, and expanded dashboards and tests to improve reliability and diagnosability. CI/infra upgrades, along with targeted security patches, reduced build flakiness and improved security posture across the repository.

April 2026

3 Commits • 3 Features

Apr 1, 2026

April 2026 (Month: 2026-04) focused on developer experience, reliability, and observability for supabase/realtime. Delivered a mise-based local development workflow with streamlined boot steps, consolidated environment configuration for easier onboarding, and runtime validations that reduce boot-time failures. Enhanced migration observability with timing metrics and richer PostgreSQL error metadata. Improved code quality through explicit typing and cleanup. Business value: faster onboarding, more reliable server boots in development/staging, and clearer error visibility during tenant migrations.

January 2025

2 Commits • 2 Features

Jan 1, 2025

January 2025 monthly summary for phoenix framework development. Focused on security-related documentation and consistency in string generation to improve developer experience and reduce production risk.

Activity

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Quality Metrics

Correctness95.2%
Maintainability86.2%
Architecture87.2%
Performance86.0%
AI Usage26.2%

Skills & Technologies

Programming Languages

DockerfileElixirJSONJavaScriptSQLShellYAML

Technical Skills

API integrationBackend DevelopmentCI/CDConcurrencyConfiguration ManagementContinuous IntegrationDatabase ManagementDevOpsDockerDocumentationEctoElixirElixir programmingEnvironment ManagementGenServer

Repositories Contributed To

3 repos

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

supabase/realtime

Apr 2026 Jun 2026
3 Months active

Languages Used

ElixirDockerfileJSONJavaScriptSQLShellYAML

Technical Skills

DevOpsDocumentationEctoElixirEnvironment ManagementPhoenix

phoenixframework/phoenix

Jan 2025 Jan 2025
1 Month active

Languages Used

Elixir

Technical Skills

Backend DevelopmentDocumentationElixir

supabase/cli

Jun 2026 Jun 2026
1 Month active

Languages Used

No languages

Technical Skills

DockerTestingTypeScriptYAML