March 2026 — Lago API performance, reliability, and security enhancements delivering tangible business value. Key features delivered included: (1) Performance Optimization and DB Indexing in lago-api: caching total_count for pagination, optimized invoice search, and reindexed for read efficiency; (2) API Stability: introduced max per_page limit with 422 validation to prevent abuse; (3) Enhanced Security and Auditing: added user device tracking and security logging for payment provider operations. Maintenance and optimization included removal of redundant indexes and addition of a composite index to better support multi-tenant queries. Overall impact: faster paginated and search endpoints, reduced DB load, safer API surface, and improved auditability. Technologies demonstrated: Rails caching, PostgreSQL indexing strategies, BitmapOr queries, service-oriented patterns, and security/audit instrumentation.

February 2026: Strengthened deployment reliability and auditability across lago-api and lago. Automated critical access-control seeding at install, expanded email and security event logging for thorough traceability, and streamlined release packaging via Docker image upgrades to speed feature delivery while maintaining stability.

January 2026 focused on delivering a robust Custom Roles and Permissions system, stabilizing OSS releases, and aligning release artifacts across repos. The work emphasized business value through flexible RBAC, backward-compatible migrations, and improved release engineering.

December 2025: Delivered cross-repo Credit Note Metadata Management across lago-api, lago-openapi, and lago-go-client. Implemented metadata support for credit notes in REST, GraphQL, and API specs, enabling create, update/merge, and delete operations along with dedicated metadata endpoints. Fixed a performance issue by addressing an N+1 query during metadata load and enhanced schema models to carry metadata. Enabled richer external-system reconciliation and data governance through standardized metadata handling. Co-authored by Julien Bourdeau; multiple repos collaborated to consolidate metadata capabilities.