LerianStudio/midaz
Oct 2024 – Jan 2026
13 Months active
Languages Used
GoEnvironment VariablesMakefileSQLYAMLenvBashDockerfile
Technical Skills
API DevelopmentBackend DevelopmentDatabase ManagementDocumentationError HandlingGo
Clara Tersi
PROFILE
Clara Tersi
Maria Clara Tersi developed core backend features and infrastructure for the LerianStudio/midaz repository, focusing on robust multi-tenant ledger, onboarding, and transaction systems. She engineered scalable APIs and data models using Go, PostgreSQL, and Redis, emphasizing data integrity, validation, and observability. Her work included unified ledger interfaces, advanced caching strategies, and distributed locking to ensure reliable transaction processing. Maria implemented comprehensive test automation, including unit, integration, and chaos testing, to validate resilience and performance. She maintained extensive API documentation with OpenAPI and Swagger, and drove continuous improvements in deployment, configuration management, and CI/CD, demonstrating deep technical breadth and maintainability.
Overall Statistics
Feature vs Bugs
74%Features
Repository Contributions
713Total
Bugs
85
Commits
713
Features
247
Lines of code
358,921
Activity Months13
Work History
January 2026
117 Commits • 56 Features
Jan 1, 2026Summary for 2026-01 (LerianStudio/midaz): Delivered a strategic uplift in testing, resilience, and data layer capabilities, with a dense program of unit/integration/chaos testing, infrastructure improvements, and targeted feature work driving business value and release readiness. Key features delivered: - Expanded test coverage: unit tests across modules (MongoDB model alias handling, PostgreSQL transaction model), plus broad integration tests for Asset, Portfolio, Segment, asset/account creation, and transactions. Added fuzz tests and performance benchmarks; introduced waitForOperations helper and parallel execution to accelerate feedback. - Chaos testing framework: consolidated chaos infrastructure across MongoDB, Redis, and RabbitMQ; enhanced proxy management and cleanup; eliminated deprecated assertions; established baseline for resilience validation. - Test infrastructure and configuration: resource limit configuration for test containers; updated integration tests for transaction handling; centralized MongoDB connection utilities (BuildMongoConnectionString) and MongoDBParameters, including tests for parameter extraction. - Metadata and API improvements: metadata index API enhancements with entity-specific routes and unified handling; integrated onboarding/transaction repositories; added integration tests for metadata-related operations. - Business feature and data model enhancements: BankingDetails ClosingDate field; CreateAlias related parties improvements; improved balance synchronization and TTL tests; updated error handling/mapping for CRM-related scenarios; documentation and OpenAPI updates for related models (CreateAliasRequest, RelatedParty). - Documentation and release readiness: API/docs updates, OpenAPI spec expansions, and CI/workflow enhancements; version bumps and changelog updates. Major bugs fixed: - Simplified error message for invalid entity name in ValidateBusinessError. - Added missing CRM errors and related party validation errors to error mapping. - Fixed handling when holder is not found during update. - Updated balance handling to return updated balance directly from repository. - Date JSON null handling fixed; mock generation filename fixes; CPF/CNPJ validation removal and related tests adjusted. Overall impact and accomplishments: - Significantly improved test quality, reliability, and performance through parallelized tests, chaos resilience, and comprehensive integration tests; reduced release risk and improved data integrity across services; established robust foundation for ongoing business feature delivery. Technologies/skills demonstrated: - Go, test automation (unit/integration/chaos), MongoDB/PostgreSQL/Redis, Docker, Makefile, CI workflows, OpenAPI/docs, metadata indexing, error handling, and performance benchmarking.
117 Commits • 56 Features
Jan 1, 2026Summary for 2026-01 (LerianStudio/midaz): Delivered a strategic uplift in testing, resilience, and data layer capabilities, with a dense program of unit/integration/chaos testing, infrastructure improvements, and targeted feature work driving business value and release readiness. Key features delivered: - Expanded test coverage: unit tests across modules (MongoDB model alias handling, PostgreSQL transaction model), plus broad integration tests for Asset, Portfolio, Segment, asset/account creation, and transactions. Added fuzz tests and performance benchmarks; introduced waitForOperations helper and parallel execution to accelerate feedback. - Chaos testing framework: consolidated chaos infrastructure across MongoDB, Redis, and RabbitMQ; enhanced proxy management and cleanup; eliminated deprecated assertions; established baseline for resilience validation. - Test infrastructure and configuration: resource limit configuration for test containers; updated integration tests for transaction handling; centralized MongoDB connection utilities (BuildMongoConnectionString) and MongoDBParameters, including tests for parameter extraction. - Metadata and API improvements: metadata index API enhancements with entity-specific routes and unified handling; integrated onboarding/transaction repositories; added integration tests for metadata-related operations. - Business feature and data model enhancements: BankingDetails ClosingDate field; CreateAlias related parties improvements; improved balance synchronization and TTL tests; updated error handling/mapping for CRM-related scenarios; documentation and OpenAPI updates for related models (CreateAliasRequest, RelatedParty). - Documentation and release readiness: API/docs updates, OpenAPI spec expansions, and CI/workflow enhancements; version bumps and changelog updates. Major bugs fixed: - Simplified error message for invalid entity name in ValidateBusinessError. - Added missing CRM errors and related party validation errors to error mapping. - Fixed handling when holder is not found during update. - Updated balance handling to return updated balance directly from repository. - Date JSON null handling fixed; mock generation filename fixes; CPF/CNPJ validation removal and related tests adjusted. Overall impact and accomplishments: - Significantly improved test quality, reliability, and performance through parallelized tests, chaos resilience, and comprehensive integration tests; reduced release risk and improved data integrity across services; established robust foundation for ongoing business feature delivery. Technologies/skills demonstrated: - Go, test automation (unit/integration/chaos), MongoDB/PostgreSQL/Redis, Docker, Makefile, CI workflows, OpenAPI/docs, metadata indexing, error handling, and performance benchmarking.
January 2026
December 2025
175 Commits • 66 Features
Dec 1, 2025Month: 2025-12 — Summary of business value and technical achievements for LerianStudio/midaz. The team focused on delivering unified ledger capabilities, reliability, and observability, while advancing documentation, testing, and deployment readiness across the ledger domain.
December 2025
175 Commits • 66 Features
Dec 1, 2025Month: 2025-12 — Summary of business value and technical achievements for LerianStudio/midaz. The team focused on delivering unified ledger capabilities, reliability, and observability, while advancing documentation, testing, and deployment readiness across the ledger domain.
November 2025
94 Commits • 21 Features
Nov 1, 2025Concise monthly summary for 2025-11 focusing on delivered value and technical achievements across the midaz project (LerianStudio/midaz). Highlighting business impact through stability, reliability, and onboarding improvements, with emphasis on Go/Go module hygiene, gRPC enablement, and test quality.
94 Commits • 21 Features
Nov 1, 2025Concise monthly summary for 2025-11 focusing on delivered value and technical achievements across the midaz project (LerianStudio/midaz). Highlighting business impact through stability, reliability, and onboarding improvements, with emphasis on Go/Go module hygiene, gRPC enablement, and test quality.
November 2025
October 2025
4 Commits • 1 Features
Oct 1, 2025Month: 2025-10 — LerianStudio/midaz Key features delivered: - Unified Transaction Key Generation and Cache Key Strategy: Introduced a centralized, robust cache key generation approach for transaction data. This refactor groups into a generic internal key, simplifies by hardcoding the 'transactions' context, and reintroduces per-organization and per-ledger isolation using UUID types for consistency and data isolation across Redis keys. Key commits include d38c1c7fc83e24db511dd97cdd64d0a131d3550c (fix: cache key pattern), 7e6a71a22fef5c76e82b5422e6e9005ce23c8c00 (fix: simplify transaction key generation), d68bcac54f3759a8de7e8a745c52e834ba43b28e (fix: update transaction key generation to include organizationID and ledgerID), and 7fe112fd91242286a275cba993169687cebd3523 (fix: update transaction key generation to accept UUID types for organizationID and ledgerID). Major bugs fixed: - Resolved cache key pattern inconsistencies and cross-tenant key leakage risks through a series of fixes, including: - fix: cache key pattern - fix: simplify transaction key generation - fix: update transaction key generation to include organizationID and ledgerID - fix: update transaction key generation to accept UUID types for organizationID and ledgerID Overall impact and accomplishments: - Improved tenant data isolation, cache reliability, and key predictability across multi-tenant deployments. - Established a scalable foundation for multi-tenant support with a maintainable, testable key-generation approach enabling future feature expansions. Technologies/skills demonstrated: - Redis-based caching and key design, UUID handling, and targeted refactoring for maintainability and extensibility. - Business value: reduced risk of data leakage, more predictable cache behavior, and easier troubleshooting across tenants.
October 2025
4 Commits • 1 Features
Oct 1, 2025Month: 2025-10 — LerianStudio/midaz Key features delivered: - Unified Transaction Key Generation and Cache Key Strategy: Introduced a centralized, robust cache key generation approach for transaction data. This refactor groups into a generic internal key, simplifies by hardcoding the 'transactions' context, and reintroduces per-organization and per-ledger isolation using UUID types for consistency and data isolation across Redis keys. Key commits include d38c1c7fc83e24db511dd97cdd64d0a131d3550c (fix: cache key pattern), 7e6a71a22fef5c76e82b5422e6e9005ce23c8c00 (fix: simplify transaction key generation), d68bcac54f3759a8de7e8a745c52e834ba43b28e (fix: update transaction key generation to include organizationID and ledgerID), and 7fe112fd91242286a275cba993169687cebd3523 (fix: update transaction key generation to accept UUID types for organizationID and ledgerID). Major bugs fixed: - Resolved cache key pattern inconsistencies and cross-tenant key leakage risks through a series of fixes, including: - fix: cache key pattern - fix: simplify transaction key generation - fix: update transaction key generation to include organizationID and ledgerID - fix: update transaction key generation to accept UUID types for organizationID and ledgerID Overall impact and accomplishments: - Improved tenant data isolation, cache reliability, and key predictability across multi-tenant deployments. - Established a scalable foundation for multi-tenant support with a maintainable, testable key-generation approach enabling future feature expansions. Technologies/skills demonstrated: - Redis-based caching and key design, UUID handling, and targeted refactoring for maintainability and extensibility. - Business value: reduced risk of data leakage, more predictable cache behavior, and easier troubleshooting across tenants.
September 2025
77 Commits • 29 Features
Sep 1, 2025September 2025 (2025-09) highlights a major refactor and feature expansion for LerianStudio/midaz centered on BalanceKey and balance workflows, with a strong emphasis on data integrity, performance, and maintainability. Key features were delivered, coupled with reliability improvements, testing coverage, and environment/CI hygiene to support faster, safer releases. The month balanced feature delivery with stability work across balance operations, metadata reliability, and infrastructure readiness, setting up the system for scale and broader API coverage.
77 Commits • 29 Features
Sep 1, 2025September 2025 (2025-09) highlights a major refactor and feature expansion for LerianStudio/midaz centered on BalanceKey and balance workflows, with a strong emphasis on data integrity, performance, and maintainability. Key features were delivered, coupled with reliability improvements, testing coverage, and environment/CI hygiene to support faster, safer releases. The month balanced feature delivery with stability work across balance operations, metadata reliability, and infrastructure readiness, setting up the system for scale and broader API coverage.
September 2025
August 2025
18 Commits • 4 Features
Aug 1, 2025August 2025 monthly summary for LerianStudio/midaz focusing on delivering deterministic data processing, richer metadata, and strengthened validation with expanded balance capabilities. Key outcomes include deterministic transaction ordering with operation metadata enrichment, expanded metadata retrieval by multiple IDs, and a robust balance management upgrade. These changes collectively improve data integrity, analytics capabilities, and system stability, while enabling safer multi-balance workflows and faster, more reliable validation of inputs.
August 2025
18 Commits • 4 Features
Aug 1, 2025August 2025 monthly summary for LerianStudio/midaz focusing on delivering deterministic data processing, richer metadata, and strengthened validation with expanded balance capabilities. Key outcomes include deterministic transaction ordering with operation metadata enrichment, expanded metadata retrieval by multiple IDs, and a robust balance management upgrade. These changes collectively improve data integrity, analytics capabilities, and system stability, while enabling safer multi-balance workflows and faster, more reliable validation of inputs.
July 2025
78 Commits • 24 Features
Jul 1, 2025concise monthly summary focused on delivering business value and technical excellence for 2025-07 at LerianStudio/midaz. The month centered on stabilizing core workflows (settings, onboarding, and transactions), expanding data models with robust validation, and boosting performance through caching and dependency upgrades.
78 Commits • 24 Features
Jul 1, 2025concise monthly summary focused on delivering business value and technical excellence for 2025-07 at LerianStudio/midaz. The month centered on stabilizing core workflows (settings, onboarding, and transactions), expanding data models with robust validation, and boosting performance through caching and dependency upgrades.
July 2025
June 2025
53 Commits • 19 Features
Jun 1, 2025June 2025: Delivered foundational route management and settings capabilities with scalable APIs, robust tests, and improved data integrity. Business value realized through enabling new operation/transaction routing features, flexible data model, and reliable pagination and error handling. Key deliverables include migration scripts and initial operation_route schema; CRUD for operation routes (create, read by ID, update, delete) with organization and ledger ID integration and comprehensive unit tests; pagination and validation enhancements (including cursor-based pagination for operation routes and validation for invalid operation route types); transaction routes endpoints with creation, retrieval by ID, updates, deletion, and API documentation updates; and a settings API overhaul with full CRUD, pagination, and duplicate-record validation.
June 2025
53 Commits • 19 Features
Jun 1, 2025June 2025: Delivered foundational route management and settings capabilities with scalable APIs, robust tests, and improved data integrity. Business value realized through enabling new operation/transaction routing features, flexible data model, and reliable pagination and error handling. Key deliverables include migration scripts and initial operation_route schema; CRUD for operation routes (create, read by ID, update, delete) with organization and ledger ID integration and comprehensive unit tests; pagination and validation enhancements (including cursor-based pagination for operation routes and validation for invalid operation route types); transaction routes endpoints with creation, retrieval by ID, updates, deletion, and API documentation updates; and a settings API overhaul with full CRUD, pagination, and duplicate-record validation.
May 2025
6 Commits • 2 Features
May 1, 2025May 2025: Strengthened onboarding robustness and API clarity for LerianStudio/midaz by delivering account type validation improvements and documentation updates. Result: reduced onboarding errors, improved user UX, and alignment between behavior and docs, enabling safer future enhancements.
6 Commits • 2 Features
May 1, 2025May 2025: Strengthened onboarding robustness and API clarity for LerianStudio/midaz by delivering account type validation improvements and documentation updates. Result: reduced onboarding errors, improved user UX, and alignment between behavior and docs, enabling safer future enhancements.
May 2025
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for LerianStudio/midaz focusing on feature delivery and security hardening. Delivered two key capabilities and fixed security-related issues, resulting in improved data integrity and a stronger security posture for Grafana.
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for LerianStudio/midaz focusing on feature delivery and security hardening. Delivered two key capabilities and fixed security-related issues, resulting in improved data integrity and a stronger security posture for Grafana.
December 2024
57 Commits • 14 Features
Dec 1, 2024December 2024 Monthly Summary for LerianStudio/midaz: Overview: The month delivered substantial governance and audit improvements with a strong emphasis on data integrity, security, observability, and deployment readiness. The work reinforced end-to-end audit capabilities, improved reliability and error handling, and modernized the operational footprint (telemetry, environment-driven config, and messaging).
57 Commits • 14 Features
Dec 1, 2024December 2024 Monthly Summary for LerianStudio/midaz: Overview: The month delivered substantial governance and audit improvements with a strong emphasis on data integrity, security, observability, and deployment readiness. The work reinforced end-to-end audit capabilities, improved reliability and error handling, and modernized the operational footprint (telemetry, environment-driven config, and messaging).
December 2024
November 2024
24 Commits • 8 Features
Nov 1, 20242024-11 monthly summary for LerianStudio/midaz focusing on the Audit component. Delivered end-to-end audit capability with scaffolding, tracing, and data pipelines; established a Trillian-backed audit trail with Mongo persistence and RabbitMQ integration; refined server bootstrap, created-tree initialization, and observability. Addressed build hygiene and configuration reliability (environments, OTEL, and MariaDB health checks). Result is a production-ready foundation for auditable, traceable ledger transactions with improved visibility, reliability, and deployability.
November 2024
24 Commits • 8 Features
Nov 1, 20242024-11 monthly summary for LerianStudio/midaz focusing on the Audit component. Delivered end-to-end audit capability with scaffolding, tracing, and data pipelines; established a Trillian-backed audit trail with Mongo persistence and RabbitMQ integration; refined server bootstrap, created-tree initialization, and observability. Addressed build hygiene and configuration reliability (environments, OTEL, and MariaDB health checks). Result is a production-ready foundation for auditable, traceable ledger transactions with improved visibility, reliability, and deployability.
October 2024
8 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 (LerianStudio/midaz): Delivered core backend robustness improvements focused on validation, data integrity, and API consistency. Implemented unified UUID handling across API and transaction components, refactoring routes to use parsed UUIDs for consistent validation and robustness. Improved user feedback and validation for metadata length constraints. Strengthened data integrity by preventing duplicate account aliases during updates and by simplifying alias validation logic (removing portfolioID requirement from FindByAlias). Completed test and documentation cleanup to reflect intended alias behavior and test outputs.
8 Commits • 1 Features
Oct 1, 2024Monthly summary for 2024-10 (LerianStudio/midaz): Delivered core backend robustness improvements focused on validation, data integrity, and API consistency. Implemented unified UUID handling across API and transaction components, refactoring routes to use parsed UUIDs for consistent validation and robustness. Improved user feedback and validation for metadata length constraints. Strengthened data integrity by preventing duplicate account aliases during updates and by simplifying alias validation logic (removing portfolioID requirement from FindByAlias). Completed test and documentation cleanup to reflect intended alias behavior and test outputs.
October 2024
Activity
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Quality Metrics
Correctness94.2%
Maintainability91.6%
Architecture90.8%
Performance90.0%
AI Usage22.0%
Skills & Technologies
Programming Languages
BashDockerfileEnvironment VariablesGoJSONJavaScriptLuaMakefileMarkdownN/A
Technical Skills
API DesignAPI DevelopmentAPI DocumentationAPI ImplementationAPI IntegrationAPI SecurityAPI TestingAPI designAPI developmentAPI testingAsynchronous ProgrammingAuditingAuthenticationAuthorizationBackend Development
Repositories Contributed To
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