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Preston Hartzell

PROFILE

Preston Hartzell

Preston Hartzell contributed to backend and infrastructure enhancements across stapi-fastapi and Element84/filmdrop-aws-tf-modules. He delivered asynchronous and optional search capabilities in stapi-fastapi by refactoring backend logic from Protocol classes to Callable type aliases, enabling scalable, non-blocking opportunity searches with robust test coverage using Python and FastAPI. In Element84/filmdrop-aws-tf-modules, Preston improved deployment workflows by adding a CIRRUS_DATA_BUCKET parameter via Terraform, streamlining configuration for Cirrus-Geo environments. He also enhanced TiTiler Lambda asset proxying by adjusting environment variables, allowing GDAL to access extension-less proxy hrefs. His work demonstrated depth in AWS, Terraform, and asynchronous programming.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

4Total
Bugs
0
Commits
4
Features
3
Lines of code
2,900
Activity Months3

Work History

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for Element84/filmdrop-aws-tf-modules. Highlights include delivering a TiTiler Lambda Asset Proxying Enhancement that enables GDAL to access extension-less proxy hrefs by excluding CPL_VSIL_CURL_ALLOWED_EXTENSIONS in the Lambda environment. This was implemented in commit 875404aa68a31711506ddde7207332ddbe7f109f with the message: "Enable exclusion of CPL_VSIL_CURL_ALLOWED_EXTENSIONS env var (#238))". Business value: improved asset proxying reliability and compatibility for extension-less proxies in stac-server workflows, reducing configuration friction for downstream users. No major bugs fixed this month. Technologies demonstrated: AWS Lambda, TiTiler, GDAL, stac-server asset proxying, Terraform modules, environment variable configuration, and Git/PR workflow.

September 2025

1 Commits • 1 Features

Sep 1, 2025

September 2025 delivered a targeted enhancement to the Cirrus-Geo deployment workflow by introducing a new CIRRUS_DATA_BUCKET parameter in the Element84/filmdrop-aws-tf-modules repository. This enables Cirrus-Geo deployment and CLI operations to reference a dedicated SSM Parameter Store entry, simplifying configuration and improving deployment reliability across environments. The change was implemented in Terraform, documented in the CHANGELOG, and committed to source control for traceability.

February 2025

2 Commits • 1 Features

Feb 1, 2025

February 2025: Delivered asynchronous and optional searching for opportunities in stapi-fastapi. By refactoring backend implementations from Protocol classes to Callable type aliases, we prepared the codebase for async execution and introduced endpoints with test coverage for async and optional search functionality. This sets the foundation for non-blocking, scalable opportunity search and improves reliability as usage scales.

Activity

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Quality Metrics

Correctness95.0%
Maintainability90.0%
Architecture92.6%
Performance85.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

HCLPythonTerraformTypeScriptYAML

Technical Skills

API DesignAWSAWS LambdaAsynchronous ProgrammingBackend DevelopmentCI/CDFastAPIInfrastructure as CodePydanticRefactoringTerraformTesting

Repositories Contributed To

2 repos

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

stapi-spec/stapi-fastapi

Feb 2025 Feb 2025
1 Month active

Languages Used

PythonTypeScriptYAML

Technical Skills

API DesignAsynchronous ProgrammingBackend DevelopmentCI/CDFastAPIPydantic

Element84/filmdrop-aws-tf-modules

Sep 2025 Jan 2026
2 Months active

Languages Used

HCLTerraform

Technical Skills

AWSTerraformAWS LambdaInfrastructure as Code

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