Principle Mechatronics Engineer

About Us

Lettr Labs is a technology company at heart, with world class robotics designed, built, and operated in house, disrupting the direct mail industry with a brand new advertising medium. Paired with an advanced direct mail advertising platform (SaaS), we integrate into the broader omni-channel advertising ecosystem. We enable businesses to connect meaningfully with customers through personalized, robotically handwritten mail that vastly outperforms conventional printed pieces.

Our mission is to make direct mail advertising as effortless and impactful as digital advertising.

As a Principle Mechatronics Engineer, you will be responsible for the architecture, design, implementation, testing, and ongoing improvement of our custom automation equipment. You’ll work across mechanical, electrical, controls, and embedded domains to deliver reliable, production-ready mechatronics systems.

This role requires a blend of high-level system thinking and low-level engineering execution. You will lead designs from concept through deployment, collaborate closely with manufacturing and operations, and continually drive performance, reliability, and throughput improvements.

You will have large, end-to-end ownership of complex electromechanical automation and robotics systems, with focus on cost, scalability and development of a warehouse automation platform to modernize and revolutionize an aging industry.

• Own the full lifecycle of mechatronics systems: requirements definition, architecture, design, prototyping, testing, release, and iteration.
• Design precision mechanisms, paper-handling components, motion assemblies, and supporting structures.
• Select and integrate actuators, sensors, linear motion systems, and industrial components.
• Design wiring harnesses, cable routing, sensor interfaces, and panel layouts.
• Develop control architectures including PLC logic, embedded firmware, state machines, and motion profiles.
• Apply principles of control theory, system modeling, and dynamics to achieve smooth, reliable motion.
• Collaborate with electrical engineers, machinists, software engineers, and operations teams to bring designs into production.
• Lead debugging and root-cause analysis efforts for mechanical, electrical, or firmware issues.
• Support manufacturing through documentation, build procedures, BOMs, testing protocols, and quality control.
• Drive continuous improvements in throughput, reliability, uptime, and ease of maintenance.

• Proven experience engineering complex automation or mechatronic systems, with demonstrated leadership in system ownership and platform architecture.
• Strong mechanical design background with experience in mechanism/motion design, precision assemblies, and CAD proficiency (Siemens NX preferred, Solid Works/Creo acceptable).
• Hands-on expertise across mechanical, electrical, and embedded domains typical of mechatronics:
  • Actuator and motor selection
  • Motion control systems
  • Sensor integration
  • Electronics fundamentals (analog/digital, grounding, shielding)
  • Wiring, harnessing, cable management
• Proficiency with embedded programming principles (state machines, RTOS fundamentals, basic C/C++ for microcontrollers, communication buses (CAN, RS-485, I2C, SPI, Modbus, Ether
  
  CAT a plus))
• Experience with industrial automation platforms (PLCs, servo drives, industrial IO).
• Strong understanding of control theory, feedback loops, PID tuning, system dynamics.
• Experience working in fast-paced, iterative engineering environments (startup or small team preferred).
• Familiarity with Python or similar for scripting, automation, data logging, and testing.

• Industry competitive salary
• Unlimited PTO policy
• 8 company paid holidays

At Lettrlabs, you’ll be part of a forward-thinking team dedicated to transforming direct mail marketing. We offer a collaborative work environment, opportunities for professional development, and the chance to make a significant impact on our growth.

Actual base salary offered will be determined by: experience, skills, and work location. This range is meant to cover total compensation and benefits. We welcome you to apply even if…