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Jonathon Jongsma

PROFILE

Jonathon Jongsma

Jonathon contributed to the actualbudget/actual repository by delivering three feature-focused improvements over three months, emphasizing clarity, configurability, and maintainability in financial modeling tools. He enhanced the crossover report by refining terminology for better user understanding and implemented new projection types and configurable inputs to support more accurate retirement planning. Using React and TypeScript, Jonathon introduced a centralized data type to reduce code duplication and applied CI-driven automation to maintain code quality. His work addressed both user experience and technical debt, demonstrating depth in front end development and data modeling while ensuring the codebase remained robust and aligned with project standards.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

6Total
Bugs
0
Commits
6
Features
3
Lines of code
603
Activity Months3

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026: Focused on codebase quality improvements in actualbudget/actual, implementing a centralized CrossoverData type to eliminate cross-file duplication and improve maintainability. Completed with automated fixes to align with project standards and documented commit for traceability.

January 2026

4 Commits • 1 Features

Jan 1, 2026

January 2026 — Delivered substantial crossover report enhancements for the actualbudget/actual repo, significantly improving forecast accuracy and configurability for retirement planning. Implemented a target income adjustment factor to tailor retirement spending projections, introduced new projection types (median and mean) to better reflect typical expenses, and removed obsolete linear trend logic to reduce misleading forecasts. Expanded investment growth modeling by adding inputs for monthly contributions and growth rates, enabling more realistic estimation of investment trajectories. Enabled explicit support for expected monthly contributions within the crossover report and updated release notes to reflect the new projection options. Fixed key reliability issues including null checks in the crossover report and removal of leftover linear trend help text, improving UX clarity. These changes deliver more accurate, flexible retirement planning, better decision support for users, and improved maintainability through CI-driven quality improvements. Technologies/skills demonstrated include TypeScript, React, data modeling for projections, CI automation (autofix CI), and clear release documentation.

December 2025

1 Commits • 1 Features

Dec 1, 2025

December 2025: Improved user understanding of the crossover report graph by renaming 'Nest egg' to 'Life Savings' to reflect common financial terminology. Implemented in actualbudget/actual via a focused commit (91271de144608b5bcb5db8ecb15a944def0e4646) as part of PR #6425. This change enhances clarity for projected values in graphs and tooltips, supporting better financial decision-making and onboarding.

Activity

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Quality Metrics

Correctness100.0%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage33.4%

Skills & Technologies

Programming Languages

JavaScriptTypeScript

Technical Skills

ReactTypeScriptfinancial modelingfront end development

Repositories Contributed To

1 repo

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

actualbudget/actual

Dec 2025 Feb 2026
3 Months active

Languages Used

TypeScriptJavaScript

Technical Skills

Reactfront end developmentTypeScriptfinancial modeling