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Osmar Luz

PROFILE

Osmar Luz

Over six months, contributed to the getlago/lago-api and getlago/lago-go-client repositories by building and refining subscription billing, payment method management, and integration features. Delivered unified payment-gated subscription lifecycles, activation rules, and multi-payment-method support, using Ruby on Rails, Go, and SQL. Addressed data integrity and performance by optimizing database queries, implementing eager loading, and enhancing error handling across API and webhook flows. Improved external integrations with NetSuite and HubSpot, ensuring reliable synchronization and idempotent operations. Focused on robust backend development, comprehensive testing with RSpec, and service-oriented architecture to support scalable, resilient billing and subscription management for complex business needs.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

29Total
Bugs
4
Commits
29
Features
9
Lines of code
27,759
Activity Months6

Work History

June 2026

9 Commits • 2 Features

Jun 1, 2026

June 2026 monthly summary focused on delivering business value through a robust subscription and billing platform, while strengthening data quality and external integrations. Key outcomes centered on unified payment-gated billing, improved tax accuracy, CRM data hygiene, and stable client API integration.

May 2026

8 Commits • 2 Features

May 1, 2026

Concise monthly summary for May 2026 focused on business value and technical execution. Highlights span NetSuite invoice handling reliability and subscription activation gating upgrades/downgrades, with emphasis on data integrity, system resilience, and scalable service design.

April 2026

4 Commits • 1 Features

Apr 1, 2026

April 2026 performance summary for lago-api: Delivered activation rules management for subscriptions and stabilized Stripe webhook concurrency under concurrent writes. These efforts unlock gated activation flows, improve data integrity, and strengthen frontend-backend alignment and payment reliability.

March 2026

1 Commits • 1 Features

Mar 1, 2026

March 2026 monthly summary for getlago/lago-api focused on performance optimization for the Credit Notes endpoint. Implemented deep eager loading and serialization improvements to eliminate N+1 queries, resulting in a dramatic reduction in database round-trips and faster response times. The work emphasizes scalability for large payloads and sets a foundation for maintainable, high-performance data access. Overall impact: substantial performance uplift for the credit notes retrieval flow, enabling reliable handling of large per_page values with lower latency and reduced DB load.

February 2026

5 Commits • 2 Features

Feb 1, 2026

February 2026: Delivered cross-provider payment methods lifecycle improvements in Lago API and introduced multi-payment-method support in the Lago Go client, reinforced by focused test fixes and migrations to ensure data integrity and reliability. This work reduces stale payment-method data, expands payment options (including SEPA), and enhances error handling and overall payments resilience across services.

January 2026

2 Commits • 1 Features

Jan 1, 2026

Month 2026-01 — Lago API delivered a feature to discard old provider customers and their associated payment methods when a payment provider is removed or replaced, aligning payment-method lifecycle with provider status and reducing stale data. The implementation touched both UI and API paths (update_service.rb and upsert_from_api_service.rb) and was committed as fix(multi-payment-methods) in f3ebb6cf741a0a9a0b095f312d8a4cc33fe0f114, addressing Lago’s provider-customer relationship (#4917). In the same period, a revert was applied to preserve existing system behavior after evaluating the discard logic. The revert is captured in f49769727ac8061e95b5b5160df277ac1aad79f8, reverting getlago/lago-api#4917 (#4951).

Activity

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Quality Metrics

Correctness97.2%
Maintainability83.6%
Architecture90.4%
Performance83.6%
AI Usage24.8%

Skills & Technologies

Programming Languages

GoRubySQL

Technical Skills

API DevelopmentAPI developmentAPI integrationActiveRecord migrationBackend DevelopmentGoGraphQLJSON HandlingRESTful ServicesRSpecRSpec testingRailsRuby on RailsSoftware EngineeringTesting

Repositories Contributed To

2 repos

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

getlago/lago-api

Jan 2026 Jun 2026
6 Months active

Languages Used

RubySQL

Technical Skills

API developmentRSpec testingRuby on Railsbackend developmentAPI integrationActiveRecord migration

getlago/lago-go-client

Feb 2026 Jun 2026
2 Months active

Languages Used

Go

Technical Skills

API DevelopmentBackend DevelopmentGoSoftware EngineeringJSON HandlingUnit Testing