Prototype Engineer · Coral Gables · USA · Active

Let’s Prototype; Coral Gables, Northern (FL, KY); Hybrid; USD 65,000 - 95,000; Full time

Benefits offered by this job

Developing new products

Flexible work environment

Continuous learning

Growth into senior role

Direct impact on product development

Job summary

Let’s Prototype is seeking a motivated Prototype Engineer to build, test, and refine functional prototypes across medical devices, AI-enabled systems, and robotics. You will join electronics, firmware, software, and industrial design teams to turn CAD models and PCBs into working prototypes.

The role rewards curiosity, craftsmanship, initiative, and practical problem solving, with hands-on work and cross-disciplinary collaboration in a fast-paced environment.

Qualifications

• We’re looking for a builder: someone who enjoys making things work, learning new technologies, and finding practical solutions.

Responsibilities

• Assemble electronic prototypes from PCB to final product.
• Solder SMT and through-hole components.
• Assemble and integrate mechanical parts.
• Operate and maintain 3D printers.
• Post-process 3D-printed parts.
• Prepare, inspect, and test PCBs.
• Prototype testing, validation, and debugging.
• Organize and improve the prototyping lab.
• Manage tools, materials, and component inventory.
• Collaborate with firmware, electronics, and mechanical teams throughout product development.

Skills

SMT soldering

Through-hole soldering

3D printing

Workshop tools

Detail-oriented

Organized and methodical

Hands-on problem solving

Independent work with collaboration

Learning new technologies

Tools

Oscilloscopes

Laboratory equipment

Job description

Location: Coral Gables, FL (preferred) or Remote within the United States (Eastern Time Zone)

About Let’s Prototype

At Let’s Prototype, we transform ideas into real products.

We develop medical devices, AI-powered products, Industrial IoT systems, robotics, and consumer electronics for startups, inventors, and companies around the world.

This is not a production job.There are no assembly lines.There is no repetitive work.

Every project is different.Every week brings a new engineering challenge.

If your idea of fun is taking something apart just to understand how it works, you’ll probably fit right in.

About the Role

We’re looking for a Prototype Engineer who enjoys building, experimenting, and solving real engineering challenges.

You’ll work alongside our electronics, firmware, software, and industrial design teams, transforming CAD models, PCBs, and engineering concepts into fully functional prototypes.

This is a highly hands‑on role where curiosity, craftsmanship, initiative, and problem‑solving skills are just as important as technical expertise.

Responsibilities

• Assemble electronic prototypes, from the PCB to the finished product.
• Solder SMT and through-hole components.
• Assemble and integrate mechanical parts.
• Operate and maintain 3D printers.
• Post‑process 3D-printed parts.
• Prepare, inspect, and test PCBs.
• Perform prototype testing, validation, and debugging.
• Organize and continuously improve the prototyping laboratory.
• Manage tools, materials, and electronic component inventory.
• Collaborate closely with the firmware, electronics, and mechanical engineering teams throughout the product development process.

Requirements

We’re looking for a builder: someone who enjoys making things work, learning new technologies, and finding practical solutions.

• We’re looking for a builder: someone who enjoys making things work, learning new technologies, and finding practical solutions.
• Strong SMT and through-hole soldering skills.
• Experience with 3D printing.
• Proficiency with workshop tools.
• Strong attention to detail.
• Highly organized and methodical.
• Hands‑on problem‑solving mindset.
• Eager to learn new technologies.
• Ability to work independently while collaborating effectively with engineering teams.

Nice to Have

• Knowledge of embedded electronics or microcontrollers.
• Experience using oscilloscopes and laboratory equipment.
• Experience with CNC machining.
• Experience with laser cutting.
• Experience with silicone molding or vacuum casting.
• Experience with Arduino, ESP32, or Raspberry Pi projects.
• Experience in robotics.
• Personal engineering projects or maker projects.

What We Offer

• Work on developing products that don’t exist yet.
• Be part of a small, highly specialized engineering team.
• Continuous learning.
• Flexible work environment.
• Opportunity to grow into a senior prototype engineering role.
• Have a direct impact on every product we develop.

One month, you may work on a medical device.The next, on an AI-powered consumer product.Then, on an Industrial IoT system or an innovative robotics platform.

You’ll be part of a highly technical engineering team where your work will have an immediate impact and your ideas will matter.

Success in Your First Six Months

• Become the go‑to person for prototype assembly.
• Reduce prototype development and build times.
• Build reliable, high‑quality functional prototypes.
• Improve laboratory organization and process repeatability.
• Enable the engineering team to spend more time designing and less time assembling.
• Contribute ideas that improve our prototyping processes.

Who Thrives Here?

People who enjoy:

• Building things.
• Solving practical engineering problems.
• Working with their hands.
• Taking ownership.
• Transforming ideas into real products.

Would You Like to Join Our Team?

If you’ve ever built a robot in your garage, repaired electronics for fun, developed your own projects, or simply can’t resist understanding how things work, we’d love to hear from you.