October 2025 — Lago API: Delivered automated fixed-charge billing with tax handling. No major bugs fixed this month. Business impact includes improved billing accuracy, faster revenue recognition, and tax compliance for fixed charges. Demonstrated Ruby-based service design, backend service patterns, and charge-model integration.

Month: 2025-09. This summary highlights the core business value delivered by Lago API work, focusing on features shipped, critical fixes, and architectural improvements that enhance reliability and scalability across billing workflows.

August 2025 highlights across lago-api and Lago: delivered a comprehensive Fixed Charges overhaul in lago-api with new override services, migrations, and modular charge model tooling; enhanced tax integration and plan/serializer workflows; broadened GraphQL exposure for fixed charges; resolved critical reliability bugs; and improved deployment stability and cross-backend billing-entity workflows. A second track included a deployment image upgrade for Lago to align with security and release cadence.

July 2025 performance focused on delivering business value through data integrity, scalable billing, and upgrade readiness across lago-api, lago-doc, and lago. Key outcomes include enabling customer_id linkage across all payments with migrations and background tasks, reducing billing errors and supporting accurate customer accounting. GraphQL-based search for subscriptions and payments was enhanced with new filters (customer details, invoice numbers) to speed operational queries. The billing model was extended with monthly fixed charges (fixed_charge) and updated Plan associations to support predictable revenue recognition. Prorated usage aggregation logic was stabilized with correct day-by-day grouping, followed by a controlled revert to prevent overcharging while preserving stable aggregation. Data quality improvements included cleaning invisible characters from customer emails (with tests). In deployment, the application was upgraded to 1.32.0 across API and Front, subprojects were synchronized, docker-compose image tags refreshed, and a migration guide (v1.32.0) published to simplify self-hosted upgrades. These changes reduce risk, improve data reliability, enable richer analytics, and position the platform for scale.

June 2025 performance summary for getlago/lago-api focused on strengthening billing accuracy, payment reliability, and multi-entity governance. Delivered per-billing-entity dunning campaigns, hardened payment processing and webhook handling, and corrected invoice numbering logic. These changes reduce invoicing errors, improve collections targeting, and enable scalable financial operations across multiple entities. Key technical activities included DB migrations to support entity linkage, service-layer enhancements for create/update/destroy flows, and comprehensive tests to verify correct linkage and behavior. Additionally, filtering of Adyen webhook events and skipping of deleted Stripe customers increased payment reliability; fixes to PDF generation for progressive billing invoices improved invoice delivery. Invoice sequencing fixes ensure proper generated numbers for finalized/voided states. Overall, the month delivers tangible business value across finance, operations, and engineering by improving revenue recognition accuracy, collections efficiency, and operational robustness.

May 2025 monthly summary focusing on multi-entity billing readiness, data governance, and invoicing accuracy across lago-api and related repos. Delivered per-billing-entity data handling, invoice/tax alignment, and operational tooling to improve reliability and business value. Versioned release readiness with updated docs to support 1.28.0.

April 2025 highlights: End-to-end multi-entity Billing Entity support across API, GraphQL, and docs, enabling correct subscription flows and billing_entity propagation; improved data integrity and analytics through billing_entity_id propagation in fees, invoices, and analytics, aided by migrations and constraints; expanded API coverage with billing_entity filters in invoices, customers, and credit_notes, plus invoices previews that include billing_entity; SDK/OpenAPI enhancements for billing entities and consistent serialization across APIs; Lago platform upgrade to 1.25.0 with submodule and image synchronization; reliability and documentation improvements, including seed/fix patches for billing entities, Stripe webhook scoping, and payment receipt PDFs; plus comprehensive docs updates (Billing Entities doc, migration guide, and navigation changes).

March 2025 performance summary for lago-api focusing on multi-entity billing capabilities, analytics enhancements, API improvements, and critical financial processing fixes. The work strengthens per-organization billing governance, enhances data accessibility, and stabilizes billing workflows for broader VAT readiness and scalability.

February 2025 monthly summary for getlago/lago-api focusing on business value and technical achievements in the Billing and Revenue Sharing domain. Key features delivered, with emphasis on data integrity, multi-entity support, and clearer reporting: - Billing Entity System: introduced core BillingEntity model, established associations, default billing entity on new organization creation, and validations to ensure data integrity across name, email, country, and related settings. Includes commit references for traceability: a85844686082212aeaa9374f62a814dc7404984e and 4cc59ddfd7041ba0fed825b7824c36364092f001. - Self-billed data export enhancement: added a self_billed field to data exports for invoices and credit notes to improve filtering and clarity in exported data. Commit: 16b38c98ff65c29f5dcf6f4aedd2a028cb8d7dfa. - Self-billed document branding update: removed the logo from the self-billed credit note PDF and updated the rendering template to reflect branding decisions. Commit: 1d9e9b7d61b9997927d4ba418d821947f6d54659. Major bugs fixed: - Self-billed data export: resolved absence of a dedicated self_billed flag that impeded filtering; data exports now accurately reflect self-billed invoices/credit notes (commit 16b38c98...). - Self-billed credit note rendering: fixed incorrect logo rendering in self-billed PDFs to ensure branding consistency (commit 1d9e9b7d...). Overall impact and accomplishments: - Strengthened data integrity and governance across billing and revenue-sharing workflows, enabling safer multi-entity onboarding and scalable org growth. - Improved reporting accuracy and export usability, reducing manual data cleansing and external reconciliation effort. - Branding alignment across revenue-share artifacts, reducing customer confusion and support overhead. Technologies and skills demonstrated: - Data modeling and database integrity: BillingEntity core model, associations, defaults, and validations. - API/data layer improvements: data export schema enhancements and self_billed flag integration. - Document rendering and templating: PDF branding adjustments for self-billed invoices/credit notes. - Cross-repo coordination and traceability: explicit commit references support auditing and rollback.

2025-01 Monthly summary: Delivered substantive invoicing enhancements, strengthened data integrity, and improved cross-repo alignment across lago-api, lago-go-client, lago-openapi, and lago. Key outcomes include customer invoice custom sections management, self-billed invoices handling and credit notes, and improved data validation for transactions and credits. Release version bumped to v1.19.1 to ensure consistency across API, front-end, and worker. These efforts drive improved billing accuracy, automation of customizations for customers, reduced reconciliation effort, and more reliable migrations.

December 2024 was a productive sprint focused on stabilizing billing workflows, expanding invoicing capabilities, and delivering targeted API improvements that unlock better business insights and faster resolution times. Key outcomes include end-to-end invoice custom sections in lago-api (database migrations, models, services, and GraphQL endpoints), a data purge tool for rapid org-level resets, reliability and performance improvements across progressive billing and the invoice refresh path, and API/openapi enhancements for event_transaction_id filtering with corresponding client updates and docs. A coordinated release cycle updated api/front images to v1.17.2. Across repos, a consistent emphasis on data integrity, clear error handling under rate limits, and test coverage for critical billing scenarios was maintained.

Month: 2024-11 — Concise monthly development summary focusing on business value, reliability, and scalability across lago-api and lago-openapi. Key deliverables and business impact: - Tax and Billing Accuracy Fixes (lago-api): corrected tax breakdowns when seller pays taxes; ensured unique line-item tax IDs; resolved a missing parent charge ID in the database, improving revenue reporting and billing correctness. Commits: c308eada305c582e43ae155c12aa669212ca2c33; e142bf11cf449cde27d379dbad9115d54bdc70a7; bad51469de2b2a37d8f5c3459418def32c5a46bc. - Plan Hierarchy and Charge-Parent Linkage Data Integrity (lago-api): fixed migrations to set parent_ids on charges and ensured child plans are properly associated with their parent plans, enhancing data integrity during migrations. Commits: 164a9607e7a3d87643b796650d384ba59dc3ee87; d5df77388000f0b5859817155bf427d3f2eaff1f. - High-Precision Fee Amounts (lago-api): enabled amounts with more than two decimals by adding unit_precise_amount_cents and migrating existing fees, enabling precise pricing and revenue calculations. Commit: 531e62a38f035b5a623a8f38413cab4acbaa6137. - Pay-In-Advance Amount Details Calculator (lago-api): introduced a new service to compute detailed amount information for pay-in-advance fees using graduated percentage models, improving billing transparency. Commit: 394fbeefd45c068d5c10b5351304de490395bca0. - Plan Update Cascading Control (lago-openapi): added cascade_updates boolean to plan parameters in OpenAPI and PlanUpdateInput, giving explicit control over whether changes propagate to child plans (default false). Commit: b26bccd00810c4f25f84843c12013a647a095ddd. Major bugs fixed: - Tax and billing breakdown correctness and database integrity issues corrected (fixes #2797, #2842, #2893). - Plan hierarchy and charge-parent linkage migrations stabilized to ensure accurate parent-child relationships (fixes #2738, #2813). Overall impact and accomplishments: - Improved billing accuracy, data integrity, and transparency across APIs; reduced revenue leakage risk and improved user trust. - Strengthened data models and migrations to support reliable pricing, taxation, and plan management at scale. - Established groundwork for advanced pricing features and API-driven configurability. Technologies/skills demonstrated: - API design and OpenAPI extensions (lago-openapi): cascade_updates parameter. - Database migrations and data integrity: charges, parent IDs, child plans. - Financial data handling: high-precision decimal pricing (unit_precise_amount_cents). - Service-oriented design and billing domain modeling: pay-in-advance amount details calculator.

October 2024: Delivered a new cascading updates capability for plan parameters in lago-go-client and fixed critical invoicing edge-case handling in lago-api, improving billing reliability and update propagation across services. These changes reduce manual intervention and strengthen data integrity across services.