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Build Your Career with THEONE

Grow with THEONE.
Meaningful work, practical growth, and real impact.

Build your career with THEONE through meaningful work, practical growth,
and measurable impact.

Korea’s only developer, built in-house, proven in real operation,
driving innovation across multiple industries.

  • Korea’s Only
  • In-House Development
  • Field-Proven

Not lab concepts, but technology that works in the field.
Want to build products like these?

View Job Openings
What We Solve

As engineers, we take on challenges that are genuinely difficult,
and therefore worth solving.

An inverter that must operate at 98% efficiency
hundreds of meters underwater under high pressure and vibration

Solution
  • Extreme-environment testing (LBTS)
  • Multi-layer safety design
  • Real-time monitoring system
Result
  • 12 years without accidents
  • Passed defense specifications
Required Skills
  • Power electronics circuit design
  • Embedded systems
  • Reliability engineering

Millimeter-level precision docking
across indoor and outdoor environments

Solution
  • Sensor fusion technology
  • Independent wheel control
  • Real-time correction algorithms
Result
  • Industry-leading 2 mm precision
  • Operation under adverse weather conditions
Required Skills
  • ROS / autonomous driving
  • Sensor fusion algorithms
  • C++ / Python

The strictest quality standards,
and meeting high-grade specifications

Solution
  • Thorough quality management system
  • Multi-stage verification process
  • Long-term reliability testing
Result
  • Certified to quality standards
  • 12 consecutive years of delivery
Required Skills
  • Quality engineering
  • Systems engineering
  • Test automation
What We Have

What Sets THEONE Apart

  • icon1

    Fast Growth

    Potential to become a project lead in the second year
  • icon2

    Direct Application

    Your designs can be applied to actual products
  • icon3

    System-Level Understanding

     

"In just one year, I was already handling technical responses at AMR deployment sites.
That would have been difficult in a large corporation."

Engineer Kang ○○ (1 year and 2 months with the company)

Who We Need

Not “it can’t be done,” but “how can we do it?”

People who persistently work through
difficult problems

Not just coding, but practical contribution

People who find value in seeing
their technology used in real operations

Not a fragmented part, but the whole

People who want to understand
the entire system

Not passive work, but proactive development

People who want to grow quickly

People who want to do meaningful work

Make a practical contribution
to the nation and society

How to Join THEONE

Application Process

  • Step 01

    Application Submission
  • Step 02

    Document Screening
  • Step 03

    Final Interview
  • Step 04

    Offer Notification

Document Screening

We review the basic contents of the application and the completeness of the personal statement. For experienced hires, applicants are assessed comprehensively based on whether their career background and job expertise align with the position. For entry-level hires, we evaluate whether applicants are a good fit for THEONE’s talent profile through broader social experience, volunteer activities, and related experiences.

Interview Process

Through multiple interview formats, including interviews with the working department and executive interviews, we evaluate each applicant comprehensively in terms of core competencies, values, and growth potential.

FAQ

Frequently Asked Questions

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Proven in the field,
THEONE’s technology is built for reliable operation.


  • Company

    THEONE Co., Ltd.

    CEO

    Kyeonghan Jeon
  • Address

    5F, Siwha High-Tech Knowledge Industry Center, 242 Seohaean-ro, Siheung-si, Gyeonggi-do, Korea
  • Fax

    +82-31-499-7473
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