Careers | Composite Tailors Co., Ltd.

Business & Products

Composite Tailors is a startup developing and manufacturing space telescopes using CFRP (carbon fiber reinforced plastic). Compared with conventional metal and glass optical instruments, CFRP telescopes will simultaneously deliver dramatic weight reduction, mass producibility, and thermal dimensional stability.
Since our founding in 2024, we have been selected as a technology development theme under the JAXA Space Strategic Fund and are steadily advancing our R&D.

The Value CFRP Brings

Up to 1/5 the weight of metal — significantly reducing launch costs
Dimensional stability across cryogenic to high-temperature environments — maintaining surface precision in space
Freedom in material design — optimizing properties through fiber orientation and layup configuration

Our Current Phase

Basic Research → Prototyping & Evaluation → Demonstration → Mass Production

Challenges We Want to Tackle Together

Thermal Deformation Control

How to ensure sub-micron shape stability under the thermal cycling of the space environment

Pursuit of Surface Precision

Establishing machining and metrology processes to finish mirror surfaces on CFRP substrates to nanometer-order accuracy

Mass Production Technology

Scaling laboratory-scale forming techniques into reproducible manufacturing processes

In-orbit Demonstration

Conducting stepwise verification from ground environmental testing through to on-orbit demonstration

What Sets a Small, Elite Team Apart

Broad expertise through cross-functional roles
Rather than being confined to a single component or process, you will be involved across material selection, forming, machining, metrology, and testing — work that requires a view of the entire project. You can deepen expertise in multiple domains simultaneously.
Rapid decision-making
In weekly technical reviews, the entire team shares direction and makes technical decisions on the spot. There is no delay from approval chains or inter-departmental coordination.
Significant autonomy
Engineers themselves lead and decide on technology selection, experimental planning, and vendor selection within their area. Proposals can be put into action immediately.
Close technical dialogue with leadership
Our President and CTO are engineers working on the front lines of development. You can engage in daily discussions and contribute to shaping technical strategy and roadmaps.
Your contributions translate directly to the product
Design changes and improvement proposals are implemented quickly. You will see your contributions clearly reflected in the performance of the product.

Open Positions

These are area-based open positions rather than fixed job titles. We design the role around your experience and interests.

New Graduate (Expected PhD completion)

Who We Are Looking For

Those who have conducted PhD research in composite materials, structural mechanics, optics, space engineering, or related fields
Those motivated to design, prototype, and evaluate with their own hands
Those who can embrace an environment still being built and actively contribute to shaping systems and processes
Those interested in turning research outcomes into real-world products

Areas of Interest

Composite Materials Engineering Structural Analysis Thermal Analysis Optical Design Precision Metrology Space Engineering

Preferred

Knowledge of CFRP, optical design, and related areas
Research experience with FEM-based structural and thermal analysis
Experience presenting at conferences or submitting papers
Ability to read and write technical documents in English

Apply

Mid-career

Who We Are Looking For

Those who work end-to-end from design and analysis through manufacturing and testing, and seek completion as a product
Those who can embrace a fast-changing development environment and adapt flexibly
Those willing to proactively collaborate with external partners
Those who want to communicate the appeal of our technology and products and contribute to the space industry

Areas of Interest

Composite Materials Engineering Structural Analysis Thermal Analysis Optical Design Precision Metrology Space Engineering Quality Assurance Environmental Testing Project Management

Preferred

Hands-on experience in any of: composite materials, optical instruments, space systems, or precision machinery
Knowledge of quality management based on JIS/ISO standards
Project management experience
Track record of patent applications or conference presentations

Apply

Employment Terms

Specific conditions are determined individually based on your experience and role. Please feel free to reach out to us first.

Employment Type	Full-time (3-month probation period)
Salary	New graduate: Monthly salary from JPY 400,000 Mid-career: Determined based on comprehensive evaluation of experience, skills, and role Bonuses twice a year (performance-linked, June and December)
Working Hours	9:00 – 18:00 (1 hour break)
Holidays & Leave	Full two-day weekend system, 120 days off per year
Other Benefits	Social insurance (health insurance, employees' pension, employment insurance), commuting allowance
Work Location	Tama Lab: Tama City, Tokyo (inside TechLab Tama Development Center) Sagamihara Lab: Sagamihara City, Kanagawa (planned to open October 2027) Kansai Lab: Hyogo Ward, Kobe City, Hyogo

FAQ

Can I apply without experience in composite materials or CFRP?

Yes. CFRP-specific knowledge can be acquired after joining.

Can I work fully remotely?

Because assembly, testing, and similar work require on-site communication and swift execution, we operate on an in-office basis as a general rule.

Can I present research results at academic conferences or publish them as papers?

We actively encourage conference presentations and paper submissions, provided they do not conflict with confidentiality obligations. All related costs are covered by the company.

Is Japanese the primary language used for business?

Most of our team members are Japanese, and communication is primarily in Japanese. However, English can be used as a business language.

My research topic does not perfectly match your areas of interest. Can I still apply?

Absolutely. As an open position, we will design the role based on your experience and interests. Please feel free to contact us.

How long does the selection process take?

From initial contact to offer typically takes one to two weeks. We can adjust flexibly based on your circumstances.

For new graduates, is it possible to apply without a PhD?

We primarily target candidates with an expected PhD completion, but we will consider research content and skills comprehensively.

Apply

Please apply via the form below. Specific documents such as your resume will be requested later.