Title: Senior JavaScript / TypeScript Developer for Real Estate Feasibility & Computational Geometry Tool

I am looking for an experienced senior developer to help improve and scale an existing web-based real estate development feasibility tool.

I already have a working prototype built primarily in HTML/JavaScript. The initial project will focus on reviewing the existing codebase, separating the core calculation engine from the user interface, and building a robust automated testing framework.

The tool involves property and parcel analysis, computational geometry, rules-based calculations, scenario evaluation, and development feasibility.

Initial Scope:

• Review and understand the existing prototype
• Refactor calculation logic into a standalone deterministic engine
• Preserve existing application behavior
• Create automated parity and regression tests
• Build automated scenario testing
• Improve code architecture and maintainability
• Prepare the system for future AI-assisted analysis and testing

The initial geographic focus is San Diego, California.

Ideal Experience:

• Strong JavaScript / TypeScript
• Node.js
• Software architecture
• Computational geometry
• Algorithm development
• Automated and regression testing
• Property-based testing or simulation
• GIS / geospatial development is a plus
• PropTech or real estate technology is a plus
• Experience integrating Claude or other LLM APIs is a plus

I am specifically looking for a developer who understands the importance of keeping core calculations deterministic and auditable while using AI as a separate analysis layer.

This is an existing prototype, not a project starting from scratch.

The first paid milestone will be limited to:

• Reviewing the existing codebase
• Providing an architecture assessment
• Recommending a refactoring plan
• Separating the core calculation engine from the UI
• Creating tests to verify that the refactored engine maintains the existing results

Additional project details and source code will be provided to qualified candidates after initial discussions.

When applying, please answer:

• Have you built a rules-based, simulation, optimization, or computational geometry engine before?
• Have you worked with automated scenario or property-based testing?
• Do you have experience with GIS, PropTech, real estate, or parcel data?
• Have you integrated Claude or other LLMs into production applications?
• Please provide examples of the most technically relevant projects you have worked on.

I am looking for someone who can potentially become a long-term technical resource if the initial milestone is successful.

Pay: $2,000.00 - $5,000.00 per month

Benefits:

• Flexible schedule

Work Location: Remote