localstack/localstack
Jun 2025 – Sep 2025
3 Months active
Languages Used
PythonJSON
Technical Skills
AWS SESPythonSnapshot TestingTestingBackend DevelopmentAPI Development
Duncan Mac-Vicar P.
PROFILE
Duncan Mac-vicar P.
Duncan Mac-Vicar contributed to the localstack/localstack repository by developing a Kinesis Resource Policy CRUD API, enabling create, retrieve, update, and delete operations with validation for Kinesis ARNs and stream existence. He also expanded end-to-end test coverage for AWS SES and SNS integration using Python and snapshot testing, reducing misconfiguration risks in production. Additionally, Duncan stabilized parameter retrieval by ensuring Secrets Manager initialization precedes SSM, preventing runtime errors during GetParameter calls. His work demonstrated depth in backend development, API design, and automated testing, resulting in improved reliability, AWS parity, and maintainability for local development and continuous integration environments.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
3Total
Bugs
1
Commits
3
Features
2
Lines of code
343
Activity Months3
Your Network
70 people
Work History
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for localstack/localstack: Delivered Kinesis Resource Policy CRUD API with create/retrieve/update/delete operations, including ARN validation and stream existence checks, plus comprehensive tests. This work enhances policy management for Kinesis resources and aligns LocalStack behavior with AWS, enabling more reliable local development and testing of access control. No major bugs reported this month; focus was on feature delivery, test coverage, and code quality improvements. Technologies/skills demonstrated include API design, input validation, test automation, and CI integration.
1 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for localstack/localstack: Delivered Kinesis Resource Policy CRUD API with create/retrieve/update/delete operations, including ARN validation and stream existence checks, plus comprehensive tests. This work enhances policy management for Kinesis resources and aligns LocalStack behavior with AWS, enabling more reliable local development and testing of access control. No major bugs reported this month; focus was on feature delivery, test coverage, and code quality improvements. Technologies/skills demonstrated include API design, input validation, test automation, and CI integration.
September 2025
July 2025
1 Commits
Jul 1, 2025July 2025: Stabilized parameter retrieval in localstack/localstack by enforcing Secrets Manager initialization before SSM to prevent GetParameter runtime errors; implemented a targeted dependency update with minimal risk.
July 2025
1 Commits
Jul 1, 2025July 2025: Stabilized parameter retrieval in localstack/localstack by enforcing Secrets Manager initialization before SSM to prevent GetParameter runtime errors; implemented a targeted dependency update with minimal risk.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 - LocalStack: Delivered SES Event Destination - SNS Integration Snapshot Test for localstack/localstack. The test validates SES describe_configuration_set with SNS destinations and ensures retrieval of event destination details, including SNS topic ARNs (commit c6edf331f775c282243deb0622ddef04053caf40). Major bugs fixed: none this month. Overall impact: expands end-to-end test coverage for SES-SNS integration, reducing misconfiguration risk and increasing reliability of event destination handling in production deployments. Technologies/skills demonstrated: snapshot testing, end-to-end integration testing, Python-based test suites, AWS SES/SNS concepts, and CI-ready test patterns. Business value: lowers production risk, accelerates validation of SES-SNS configurations, and provides stronger confidence to developers and customers.
1 Commits • 1 Features
Jun 1, 2025June 2025 - LocalStack: Delivered SES Event Destination - SNS Integration Snapshot Test for localstack/localstack. The test validates SES describe_configuration_set with SNS destinations and ensures retrieval of event destination details, including SNS topic ARNs (commit c6edf331f775c282243deb0622ddef04053caf40). Major bugs fixed: none this month. Overall impact: expands end-to-end test coverage for SES-SNS integration, reducing misconfiguration risk and increasing reliability of event destination handling in production deployments. Technologies/skills demonstrated: snapshot testing, end-to-end integration testing, Python-based test suites, AWS SES/SNS concepts, and CI-ready test patterns. Business value: lowers production risk, accelerates validation of SES-SNS configurations, and provides stronger confidence to developers and customers.
June 2025
Activity
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance93.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
JSONPython
Technical Skills
API DevelopmentAWS SDKAWS SESBackend DevelopmentIAM PoliciesPythonSnapshot TestingTesting
Repositories Contributed To
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