System Modeling Engineer

About Zipline 

Do you want to change the world? Zipline is on a mission to transform the way goods move. Our aim is to solve the world’s most urgent and complex access challenges by building the first instant logistics system that serves all humans equally. Leveraging expertise in robotics and autonomy, Zipline serves tens of millions of people around the world. Join Zipline and help us to make good on our promise to build an equitable and more resilient global supply chain for billions of people.

About The Systems Modeling Team

The Systems Modeling Team has tremendous power to shape Zipline’s products. We develop physics-based models and use them to architect and optimize our aircraft, as well as the supporting logistics system. Through simulation, we can rapidly explore a vast array of design options for future products, and we can find ways to wring more performance out of our existing products. 

Systems Modeling brings diverse teams and fields together (e.g. mechanical, aerodynamics, electromagnetics, electrical, battery chemistry, thermal, controls, fleet operations, economics) to gain new insights. We translate technical conversations into rigorously framed engineering problems. We value asking pertinent questions and generating coherent answers. 

What You'll Do  

Your role will guide and accelerate range and energy modeling during development phases and scaling. You will develop complex simulation capability and physics-based models for predicting energy consumption per phase of flight, at various levels of fidelity, including highly optimized models that can execute at run-time. 

You’ll zoom in on the finer points of powertrain and vehicle modeling, including powertrain losses, vehicle kinematics,and vehicle thermal modeling, and battery/cell performance modeling. This role is also hands-on with data - whether it’s reviewing large-scale fleet data, or conducting specific experiments to extract physical coefficients. These models will form the backbone of our energy planning and dynamic routing algorithms.

Importantly, you will challenge assumptions and requirements – especially those which drive the most cost and complexity. You will relentlessly pursue high-quality insights by improving validation processes, checking simulation results with independent hand calculations, safeguarding model inputs, and calling out where model assumptions are weakly supported by data.   

Your team also optimizes the operational efficiency of the Zipline fleet, directly impacting our customers. What is the smallest number of aircraft that can effectively support a given service area? How might we maximize deliveries per unit hardware by identifying and eliminating bottlenecks, or by adding sophistication to our aircraft dispatching strategy? How should we manage battery charging, given competing objectives of battery life versus charging speed? Is it best to avoid windier parts of the day, or is it ultimately too costly to sit idle? Your team’s model-driven analysis will link operational decisions with customer-facing outcomes. 

What You'll Bring  

• Demonstrated experience building mathematical models and modeling frameworks, across languages, methods, and tools
• Deep programming experience in Python, MATLAB, or Rust
• An understanding of numerical methods
• Strong convictions about the defining attributes of high-quality code tools 
• Demonstrated experience integrating simulation tools across platforms and software languages 
• A mastery of engineering and physics fundamentals:
• Energy and power
• Dynamics (kinematics, forces, moments, acceleration/rotation)
• Fluids and aerodynamics
• Heat transfer and thermodynamics
• Battery and cell chemistry principles
• Powertrain modeling: motor electromagnetics, powertrain losses
• Fluency in system-level optimization 
• An ability to distill an open-ended topic into a rigorously framed problem statement
• Familiarity with a variety of solution techniques, and the ability to identify an appropriate technique for a given problem
• Comfort with empiricism
• An ability to interpret complex datasets that span multiple physical realms
• Experience designing test campaigns for model validation
• Familiarity with practical considerations in embedded algorithm design
• Excellent communication skills, particularly in distilling multidimensional solution spaces into straightforward insights
• Demonstrated leadership attributes
• Awareness of the most critical needs of the company, and motivation to seek out unsolved problems
• An ability to drive progress on many projects at once, and to dynamically prioritize projects in a fast-evolving environment
• Courage to make tough decisions in the face of imperfect information
• Adherence to thorough and well-organized documentation
• Patience to teach technical skills to others, while remaining open-minded to learning new skills yourself
• Empathy and understanding for the people you work with

Minimum Experience:

• 5 years related industry experience
• BS in Mechanical Engineering, Electrical Engineering, or similar discipline; MS strongly preferred

What Else You Need to Know

The starting cash range for this role is Salary range: $145,000 - $185,000. Please note that this is a target, starting cash range for a candidate who meets the minimum qualifications for this role. We are always open to negotiation. The final cash pay for this role will depend on a variety of factors, including a specific candidate's experience, qualifications, skills, working location, and projected impact. The total compensation package for this role may also include: equity compensation; discretionary annual or performance bonuses; sales incentives; benefits such as medical, dental and vision insurance; paid time off; and more.

Zipline is an equal opportunity employer and prohibits discrimination and harassment of any type without regard to race, color, ancestry, national origin, religion or religious creed, mental or physical disability, medical condition, genetic information, sex (including pregnancy, childbirth, and related medical conditions), sexual orientation, gender identity, gender expression, age, marital status, military or veteran status, citizenship, or other characteristics protected by state, federal or local law or our other policies.

We value diversity at Zipline and welcome applications from those who are traditionally underrepresented in tech. If you like the sound of this position but are not sure if you are the perfect fit, please apply!