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Added 5 mins ago
JI
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Ribbit

Senior Flight Controls Engineer

Burlington, ON, Canada

$153,920 to $168,480 CAD / year · Full-time

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Applications open in a new tab.

Job details

Pay: $153,920 to $168,480 CAD / year
Job type: Full-time
Apply by: Nov 18, 2026
Posting language: English
Posted: Oct 20, 2026

Original job description

Thank you for exploring opportunities at Ribbit! We look forward to speaking with you.

Note: the Careers page is under maintenance; actual details and interview process may differ slightly

Note: We read everything that comes our way. Let your outstanding résumé (cover letter and design portfolio encouraged but optional) do the talking. For important questions or comments, contact us at careers@flyribbit.com.

Company

Founded in 2020, Ribbit builds and operates autonomous airplanes. We develop technology that enables uncrewed gate-to-gate operations, having completed hundreds of autonomous flight hours on different aircraft, flown 10K+ hours in simulation, and secured flight authorities for remotely and optionally piloted flight. From defending sovereignty to delivering food and medical supplies, we are a trusted partner that businesses and governments rely on to test, operate, and deploy affordable autonomous aircraft. You can check out our videos here.

We believe that technology should be developed for and with the customer. In 2023, we signed our first federal contract with the Government of Canada, during which we performed Canada’s first autonomous gate-to-gate flight between two airports. Since then, we have won several additional contracts, including contracts with the National Research Council of Canada (NRC) and the Department of National Defence (DND) spanning platform, mission, and collaborative autonomy. We pride ourselves on knowing the customer better than themselves, serving them better than anyone else, and ensuring they succeed in a world with everyone else.

This year alone, we performed the world's first demonstration of collaborative teaming between an autonomous airplane and an autonomous helicopter. We also deployed Canada's first optionally piloted aircraft with a military callsign. We are now building novel autonomous aircraft for DND and Canada's allies, aligning our immediate defence clients with a backlog of interest across northern wholesalers, public safety agencies, freight forwarders, and humanitarian organizations. Autonomy is reshaping the way we move, understand, and protect the world.

Our team has years of experience with piloting, commercial drone operations, and autonomous mobile robotics - we're concentrating the world's best software, robotics, and aeronautical expertise to pursue our mission of making air transportation accessible to everyone. If you’re up for the challenge, we want to hear from you.

Position Overview

As a Senior Flight Controls Engineer, you will collaborate with peers to:

Lead development of flight control for autonomous fixed-wing aircraft. You will shape its architecture and roadmap, lead design reviews, and hold the bar on code quality
Own the aircraft modelling behind the control system, including trim and operating-point models, actuator and propulsion models, and the simulations used to design and verify control laws
Stay hands-on: design and tune control laws yourself, write production C++, and review the hardest changes
Represent control in design reviews with the navigation, state estimation, hardware, and flight-test teams, and mentor the engineers who join the team
Work with flight-test engineers and safety pilots to plan and fly test campaigns, tune control laws during and after flights, and turn pilot feedback into improvements

Your Key Objectives Will Include

Building and maintaining high-fidelity models of real aircraft from first principles (6-DOF equations of motion, aerodynamic coefficients, mass and inertia, propulsion and actuator dynamics), refined by system identification from flight data
Trimming and linearising the aircraft across its envelope, and using the results to design, analyze, and schedule control laws (e.g. stability margins, robustness to model uncertainty)
Designing and tuning control laws for automatic takeoff and landing: ground roll, rotation, crosswind technique, glide-path tracking, flare, touchdown, rollout, and go-around
Designing energy management and lateral path following (e.g. TECS, L1 or similar nonlinear guidance) that hold up in wind and turbulence
Implementing envelope protection and failure handling (e.g. stall, bank, load factor, and actuator limits), and safe handover of control to and from the safety pilot
Taking control laws from design and analysis to production C++ that meets safety-critical standards, verified in closed-loop simulation (SIL/HIL) and flight test

Other Details

No. of Positions: 1
Duration: Permanent Full-Time, starting December 2026
Base Compensation: 153920 to 168480
This is a hybrid role involving remote work and on-site presence to support field tests - you must be in the Greater Toronto Area or willing to relocate
Competitive and comprehensive compensation (e.g. 3 weeks of vacation upon joining, comprehensive health and wellness plans)
You must be eligible to hold a Government of Canada security clearance at the Reliability or Secret level, and pass security assessment for the Controlled Goods Program

Qualifications

As the ideal candidate, you meet the following requirements:

A university degree in aerospace, mechanical, or electrical engineering, or a related field
Hands-on experience designing control laws that have flown on real aircraft, including tuning and validating them in flight test
MATLAB/Simulink and/or Python for modelling, analysis, and system identification, and C++ for implementing control laws on real-time systems
A strong foundation in flight dynamics: equations of motion, aerodynamic modelling, stability derivatives, trim, and linearisation
Experience identifying aircraft models from flight or test data (e.g. frequency-domain, output-error, and equation-error methods)
Experience designing and analyzing aircraft control, both classical (cascaded loops, gain scheduling, anti-windup) and model-based (e.g. LQR, NDI/INDI, MPC)
Experience with the takeoff and landing phases, including automatic landing, flare laws, and ground dynamics
Experience with flight simulators (e.g. X-Plane, JSBSim, FlightGear, Simulink 6-DOF models)

Preferred And Bonus Qualifications Include Experience With

Developing and/or flight-testing autonomous aircraft or drones in a professional setting
Modelling fixed-wing general aviation aircraft, including propeller and piston-engine propulsion
A pilot licence, or experience as a flight-test engineer
Wind, gust, and turbulence models (e.g. Dryden, von Karman, wind shear)
Autoland, or certifying flight-control software (e.g. DO-178C, DO-331)
Code generation from models (e.g. MATLAB Coder, Embedded Coder) and safety-critical coding standards (e.g. MISRA C++)

You also possess the soft skills to work in a high-stakes, tight-knit company, such as:

Openness to give and receive feedback
Adaptability when priorities move
Self-awareness about your own strengths and gaps
Taking initiative with minimal guidance

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More about this job

Responsibilities

Lead the architecture, modeling, design, implementation, and verification of flight controls for autonomous fixed-wing aircraft, including control laws for takeoff, landing, energy management, and envelope protection. Collaborate with navigation, estimation, hardware, and flight-test teams; lead design reviews, conduct flight-test campaigns, and mentor engineers.

Requirements

Requires a university degree in aerospace, mechanical, electrical, or a related engineering field, hands-on experience designing and flight-validating aircraft control laws, and strong expertise in flight dynamics, aircraft modeling, system identification, and control analysis. Candidates should be proficient in MATLAB/Simulink or Python and C++, and have experience with automatic landing, flight simulators, and real-time control systems.

Skills

Flight Control Systems
Aircraft Modeling
Flight Dynamics
Control Law Design And Tuning
System Identification
MATLAB/Simulink
Python
C++
Fixed-Wing Aircraft
Automatic Takeoff And Landing
Energy Management
Lateral Path Following
Flight Testing
Closed-Loop Simulation
Safety-Critical Software
Mentoring

Benefits

Three Weeks Of Vacation Upon Joining
Comprehensive Health And Wellness Plans

Visa sponsorship

Not detected in the job text

Keywords

Autonomous Aircraft
Fixed-Wing Aircraft
Flight Controls
Flight Dynamics
Six-Degree-Of-Freedom Equations Of Motion
Aerodynamic Modeling
Trim And Linearization
System Identification
MATLAB/Simulink
Python
C++
Real-Time Systems
Control Law Design
Gain Scheduling
Anti-Windup
LQR
NDI/INDI
Model Predictive Control
Automatic Takeoff And Landing
Autoland
Energy Management
TECS
L1 Guidance
Envelope Protection
Flight Testing
SIL/HIL Simulation
X-Plane
JSBSim
FlightGear
DO-178C

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