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Steven Janzou

PROFILE

Steven Janzou

Over 14 months, this developer delivered robust backend and API enhancements across the NREL/SAM and NREL/ssc repositories, focusing on energy systems modeling, financial reporting, and cross-platform reliability. They modernized API surfaces, integrated Google OR-Tools for dispatch optimization, and improved configuration serialization using C++ and Python. Their work included refining CI/CD pipelines with CMake and GitHub Actions, expanding test coverage, and implementing resilient JSON handling for NaN/Infinity values. By addressing complex cost modeling, UI navigation, and data validation challenges, they enabled more accurate simulations and streamlined workflows, resulting in higher-quality releases and improved maintainability for renewable energy software platforms.

Overall Statistics

Feature vs Bugs

59%Features

Repository Contributions

212Total
Bugs
39
Commits
212
Features
56
Lines of code
1,173,143
Activity Months14

Work History

March 2026

7 Commits • 3 Features

Mar 1, 2026

March 2026 performance summary for NREL repos: - Delivered Google OR-Tools optimization integration across NREL/ssc and NREL/SAM, enabling dispatch optimization CSP paths and CBC-based solving, with enhanced multi-platform CI (Windows/macOS) and updated build/test tooling for reliability. - Implemented OR-Tools-based CSP dispatch optimization and expanded the dispatch framework (base_dispatch_ortools, csp_dispatch_ortools) with integration into cmod_tcsmolten_salt, alongside CMake/CI updates to support modern toolchains. - Executed cross-platform build enhancements and tests, including updates to CMakeLists, Windows/MSVC/GLPK support, and test coverage improvements for Windows runners and Linux GA workflows. - Fixed critical Windows build issues (notably wxWidgets debug build configuration) and added Windows host developer/API enhancements to broaden Windows compatibility and simplify maintenance. - Strengthened testing and CI workflows: added lib_ptes_chp_dispatch_test, updated ssc SAM workflows for Windows/Linux runners, and improved test resilience and artifact generation for faster feedback and higher confidence in releases.

October 2025

9 Commits • 4 Features

Oct 1, 2025

Month: 2025-10 — Key delivery across two repositories (NREL/ssc and NREL/SAM) focused on reliability, finance/reporting capabilities, and API improvements. Business value delivered includes a more stable CI pipeline, enhanced cash-flow reporting, and streamlined cost modeling, all supported by data-driven QA.

September 2025

2 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary for NREL/SAM. Highlights include delivering a CI Build Stability Improvement by updating the WxWidgets version in the CI workflow (3.2.8.1) and a fix to the SSC Auto-Exec preprocessing documentation comment to accurately reflect search behavior for hybrid variables, incorporating feedback from Matt. These changes improved build reliability, reduced ambiguity in preprocessing behavior, and enhanced maintainability across the team.

August 2025

9 Commits • 2 Features

Aug 1, 2025

August 2025 performance summary for NREL SSC and SAM: Delivered reliability-focused test improvements and UX/navigation enhancements; fixed key navigation bugs; introduced configurable TimeOfDeliveryFactors; improved CI/CD and testing hygiene, delivering faster, more reliable software and better user experience.

July 2025

19 Commits • 3 Features

Jul 1, 2025

Month: 2025-07 — This month delivered user-facing UI improvements in SAM and strengthened cross-platform CI/CD and test reliability in SSC, driving business value through improved usability, faster feedback, and more stable releases. Key technical achievements include UI/UX enhancements using wxMetroDataViewTreeCtrl for notes, cross-repo release alignment, and robust CI workflows with enhanced logging across platforms.

June 2025

3 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary focusing on key accomplishments, business value, and technical achievements for NREL/SAM and NREL/ssc. Emphasis on reliable configuration serialization, cross-repo consistency, and impact on downstream reliability.

May 2025

28 Commits • 8 Features

May 1, 2025

May 2025 performance summary for NREL/ssc: Delivered core feature enhancements, stabilized testing, and quality improvements across the codebase, with a strong emphasis on business value and reliability.

April 2025

10 Commits • 3 Features

Apr 1, 2025

April 2025 performance summary for NREL development across SAM and SSC. Delivered stability, data integrity, and maintainability improvements that directly enhance simulation accuracy and release readiness, while reducing runtime errors and facilitating faster deployment of updated SSC versions.

March 2025

18 Commits • 5 Features

Mar 1, 2025

March 2025 monthly summary for NREL repositories (NREL/ssc and NREL/SAM), highlighting key features, major fixes, and business value. Delivered reliability improvements, TOD-enabled pricing/calculation, API modernization, revenue accounting safeguards, and enhanced reporting/case-management capabilities across two repos.

February 2025

23 Commits • 5 Features

Feb 1, 2025

February 2025 monthly summary for NREL/ssc focusing on code coverage and CI/build system enhancements, with a strong emphasis on reliability and business value.

January 2025

34 Commits • 5 Features

Jan 1, 2025

January 2025 performance summary for NREL/SAM and NREL/ssc focused on delivering end-to-end geothermal cost modeling improvements and strengthening code reliability. Key features and API work enabled ATB-aligned costing workflows and improved GETEM integration, while robust bug fixes and data validation enhancements reduced risk and increased data integrity across the stack. The month balanced business-value delivery (accurate cost projections, streamlined ATB flows) with technical gains in API design, testing, and Linux-compatible debugging.

December 2024

17 Commits • 4 Features

Dec 1, 2024

December 2024 performance summary for NREL/SAM and NREL/ssc. Delivered major feature enhancements, reliability fixes, and release-readiness improvements that improve modeling fidelity, deployment stability, and business value. Key outcomes include expanded API surfaces and SCO2 support for solar field/heat sink modeling; Linux-specific geocoding/time zone reliability improvements with diagnostics; cross-repo CI and installer hardening; internal refactor for clarity and release readiness; and public release version bumps plus extended geothermal cost modeling.

November 2024

23 Commits • 8 Features

Nov 1, 2024

November 2024 performance summary for NREL SSC and SAM repositories. Delivered substantial heat- and IPH-related modeling enhancements, PPA/financial metric refinements, and robust integration of thermal components, complemented by UI improvements and API/default alignment. Critical bug fixes and data quality updates improved model reliability for heat-enabled configurations and hybrid scenarios, enabling more accurate business decisions and faster stakeholder reporting.

October 2024

10 Commits • 4 Features

Oct 1, 2024

October 2024 monthly summary focusing on business value and technical achievements across NREL/ssc and NREL/SAM. Key outcomes include thermal energy support and visualization, DSGL IPH financial modeling enhancements, IPH configuration and revenue controls, API cleanup and modernization, and improvements to cash flow reporting. Delivered features expand analytics, improve financial accuracy for thermal and IPH scenarios, and reduce technical debt.

Activity

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Quality Metrics

Correctness84.0%
Maintainability85.8%
Architecture78.0%
Performance76.0%
AI Usage20.2%

Skills & Technologies

Programming Languages

BashCC++CMakeCSVJSONJavaScriptLKLK ScriptPowerShell

Technical Skills

API DesignAPI DevelopmentAPI IntegrationAPI developmentBackend DevelopmentBash ScriptingBenchmarkingBug FixBug FixingBuild AutomationBuild ConfigurationBuild System ConfigurationBuild SystemsCC++

Repositories Contributed To

2 repos

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

NREL/ssc

Oct 2024 Mar 2026
13 Months active

Languages Used

C++BashCMakeYAMLPythonShell

Technical Skills

C++Code RefactoringEnergy Systems ModelingModel UpdatesSoftware DevelopmentBug Fix

NREL/SAM

Oct 2024 Mar 2026
12 Months active

Languages Used

CC++JavaScriptLKLK ScriptCSVJSONjson

Technical Skills

API DevelopmentCC++Code RefactoringConfiguration ManagementFinancial Modeling