Modeling Engineer/Scientist

Go Fractional; South San Francisco (CA); Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

Equity opportunity

Contract-to-Hire

Remote-friendly

Job summary

Go Fractional is seeking a highly skilled modeling-focused professional to expand an AI-driven BHN platform. You will work at the intersection of computational biology and systems engineering, blending scientific modeling with engineering implementation.

The role emphasizes hands-on development of mechanistic ODE models, collaboration with software engineers, and the creation of clear model documentation. Flexible location with travel to South San Francisco as needed.

Qualifications

• Advanced degree in systems biology, biomedical/chemical engineering, computational biology, or related quantitative field.
• Experience developing ODE-based models of complex nonlinear systems.
• Hands-on experience using AI tools to support model development and analysis.
• Strong scientific communication across the science–engineering boundary.

Responsibilities

• Extend depth and breadth of the BHN model, including expansion into additional neurodegenerative diseases.
• Develop and refine ODE-based mechanistic models of biological processes.
• Use the BHN model to analyze target opportunities and support therapeutic development and experiments.
• Collaborate with software developers in AI-driven workflows and tooling to accelerate model development and analysis.
• Create clear annotations and documentation of model and software architecture and code.

Skills

ODE-based modeling

AI tools usage

Scientific communication

Cross-disciplinary collaboration

Education

PhD or MS with relevant experience

Tools

Mathematica

Job description

The Role

Reporting to the Chief Technology Officer, you will help expand and deepen the BHN model and continue to develop the AI-driven platform that builds it. This is a hands‑on modeling role at the intersection of computational biology, systems engineering, and applied AI — a bridge between the science and the engineering.

Your work will include:

• Extending the depth and breadth of the BHN model, including expansion into additional neurodegenerative diseases.
• Developing and refining ODE-based mechanistic models of biological processes, from equations and level of abstraction through to integrated modules.
• Using the BHN model to analyze target opportunities, support therapeutic development and optimization, and design experiments for the lab and for clinical trials.
• Collaborate with software developers in the AI-driven workflows and tooling that accelerate model development and analysis, including chat and visualization interfaces, to enable modelers and scientists to interact with BHN.
• Creating clear annotations and documentation of model and software architecture and code.

This is an opportunity to work with pioneers in biological modeling and quantitative systems pharmacology (QSP) to make an impact on the treatment of neurodegenerative disease while working at the leading edge of modeling techniques and technology infused with AI.

The ideal candidate would be based in the San Francisco Bay Area and able to travel to the company's office in South San Francisco, CA one day per week. Remote candidates should be willing to travel to South San Francisco, CA every 1-2 months.

Qualifications

Required

• Advanced degree (PhD, or MS with relevant experience) in systems biology, biomedical or chemical engineering, computational biology, applied mathematics, or a related quantitative discipline. Open to candidates coming directly from a PhD or postdoc.
• Demonstrated experience developing ODE-based models of complex nonlinear systems.
• Hands‑on experience using AI tools to support model development and analysis.
• Strong scientific communication skills and the ability to work across the science–engineering boundary.

Highly Desired

• Demonstrated experience developing ODE-based biological models.
• Familiarity with Bayesian inference, management of structural and parametric uncertainty and variability, in complex dynamic models.
• Experience with AI-assisted coding (vibe coding) and skill development for agentic workflows.Experience with Mathematica.
• Experience working in a pharma or biotech organization.
• Familiarity with neurodegeneration, aging biology, or brain physiology.

What We Offer

• The chance to shape a first‑of‑its‑kind mechanistic, causal model of brain health at an early‑stage company.
• Co‑authorship on publications emerging from your contributions.
• Meaningful early‑stage equity and contract rate commensurate with experience.

This is a full‑time, contract‑to‑hire role: we intend it as a path to full‑time employment.

Location: South San Francisco, CA - Remote (any location)

Employment Type: Contract-to-Hire