Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 207 days ago

R&D Propulsion System Engineer

iSpace, Inc.59 open roles

Where
Tokyo, Japan
Work mode
Hybrid
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowR&D Propulsion System EngineeriSpace, Inc. · Tokyo, Japan

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on iSpace, Inc.'s own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

7.8% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 1.7%1 day
  2. 3.5%3 days
  3. 7.8%7 days
  4. 14.6%14 days
  5. 34.1%30 days
This job: posted 207 days ago

The posting

ispace, inc. is looking for highly motivated Propulsion System Engineer advanced research & development (ARD) group.

This position is based in Tokyo, Japan and will require you to relocate. This is not a full remote position.

Successful candidate will participate in two types of ARD projects:

1) new technology development/demonstration and

2) next generation lunar transportation, infrastructure, and resource utilization system architecture creation from initial concept to system preliminary design level.

This role focuses on high thrust propulsion systems, including earth-storable propulsion and advanced propulsion concepts. You will work within a multidisciplinary, model‑driven design team, developing Python‑based propulsion models, exploring large tradespaces, leading technology demonstration projects, and shaping the propulsion architecture of future ispace vehicles.

It is expected that technical solution concepts start at mid/low technical maturity and you develop them to a CML2+ level (see JPL "concept maturity level" scale).

#LI-Hybrid

Key responsibilities

  • Lead propulsion architecture definition and modeling for conceptual‑level system studies of different elements of lunar transportation missions (e.g., Orbit Transfer Vehicles, landers, orbital infrastructure), following ARD guidance and contributing through the concept maturation.
  • Develop and maintain Python‑based propulsion models for sizing and system‑level tradespace analysis.
  • Assess, compare, and select main‑engine propulsion options - including pressurization, propellant management, feed systems, engine cycles, and key component selections - to optimize system KPIs.
  • Investigate and evaluate cutting‑edge propulsion technologies, generating recommendations for future R&D activities and long‑term capability roadmaps.
  • Support R&D implementation projects, including propulsion‑related technology demonstrations and customer‑driven development efforts from concept to testing campaign.
  • Contribute technically to early‑phase business development, collaborating with Business Development and Government Relations teams to inform proposals and strategic studies.
  • Work closely with multidisciplinary ARD members (structures, comms, thermal, GNC, mission design) to ensure propulsion concepts integrate coherently with system‑level architecture.

Basic Qualifications

  • Bsc. or Masters degree / experience in mechanical, aerospace, or related engineering fields.
  • Five or more years of relevant experience in analytical modelling of chemical propulsion, including pressurization system, feeding system, boil-off, propellant transfer, propellant management devices, rocket engine cycle, mass and fluid budget analyses.
  • Solid understanding of mission‑level propulsion considerations (e.g., delta‑V budgeting, propellant selections, pressurization and feedsystem architectures, usable and unusable propellants, sloshing, and mission environments).
  • 3 years of experience with relevant modelling programming languages (Python: NumPy, SciPy, Pandas, Matplotlib, or alternatively strong experience in matlab).
  • Ability to work in fast‑paced, ambiguous conceptual environments and take proactive technical ownership.

Preferred qualifications

  • Experience in propulsion system components selection, trading-off technical compatibility, schedule, and cost
  • Experience with advanced propulsion architectures such as cryogenic and hybrid rocket propulsion systems.
  • Experience as systems engineering applying the Model Based Systems Engineering approach
  • Experience with conceptual design methods, low‑fidelity modeling, or early‑phase systems engineering.
  • Eperience using Git for version control in a CI/CD environment, contributing to shared codebases, reviewing merge requests, and maintaining high‑quality, reproducible model development practices.
From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against iSpace, Inc.'s own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on iSpace, Inc.'s form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    iSpace, Inc.'s answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.