AlignerrCoding & software eval
Robotics Simulation Engineer
up to $200/hr
About this role, in Alignerr's words
What if the physics simulations you build could teach the next generation of robots how to walk, grasp, and navigate the real world? We're looking for Robotics Simulation Engineers based in Tokyo to design, build, and optimize high-fidelity physical simulations that bridge the gap between virtual environments and real-world robotic systems.
What you'll do
- Design and implement high-fidelity robot models (URDF/MJCF) with accurate kinematics, dynamics, and contact properties
- Build and maintain simulation environments using MuJoCo, NVIDIA Isaac Sim, and/or Gazebo
- Develop end-to-end simulation pipelines for robot training, testing, and validation
Show all 9 itemsHide the other 6 in What you'll do
- Tune physics parameters — friction, damping, inertia, actuator models — to maximize sim-to-real transfer
- Integrate simulations with ROS2 for perception, planning, and control workflows
- Write clean, performant code in Python and/or C++ to support simulation infrastructure
- Collaborate asynchronously with robotics researchers and engineers on model accuracy and environment design
- Profile and optimize simulation performance for large-scale or parallelized runs
- Document simulation configurations, model parameters, and pipeline architecture
Candidate background
Who You Are
- Strong hands-on experience with at least one major robotics simulator: MuJoCo, NVIDIA Isaac Sim, or Gazebo
- Proficient in Python and/or C++ in a robotics or scientific computing context
- Solid understanding of rigid-body dynamics, contact mechanics, and control theory
- Experience creating and validating robot models (URDF, MJCF, or SDF formats)
- Familiarity with ROS2 and its integration with simulation environments
- Comfortable working with simulation pipelines — from environment setup to data collection and evaluation
- Self-directed, detail-oriented, and effective when working independently
- Strong problem-solving instincts and a drive to close the sim-to-real gap
- Strong English communication skills (written collaboration is conducted in English)
Nice to Have
Show all 7 itemsHide these 7 items in Nice to Have
- Experience with domain randomization, sim-to-real transfer techniques, or reinforcement learning in simulation
- Familiarity with GPU-accelerated simulation (e.g., Isaac Gym, MuJoCo MJX)
- Background in legged locomotion, manipulation, or multi-body systems
- Experience with CI/CD for simulation testing and automated validation
- Knowledge of sensor simulation — cameras, LiDAR, IMUs, force/torque sensors
- Contributions to open-source robotics or simulation projects
- Graduate-level coursework or research in robotics, controls, or computational physics
Quoted from selected sections of Alignerr's posting. The full posting may state other conditions. Read the full posting
A closer look
More context, when you need it.
Full job descriptionThe original posting, in Alignerr's words
Posted by Alignerr, reproduced here so you can judge the role before clicking. Original posting ↗
Robotics Simulation Engineer
About the Role
What if the physics simulations you build could teach the next generation of robots how to walk, grasp, and navigate the real world? We're looking for Robotics Simulation Engineers based in Tokyo to design, build, and optimize high-fidelity physical simulations that bridge the gap between virtual environments and real-world robotic systems.
Japan's deep tradition in robotics — from industrial automation to humanoid research — means Tokyo is home to some of the world's most experienced simulation and controls engineers. We want to work with you.
This is a fully remote, flexible contract role. No corporate red tape — just meaningful, technical work on problems that matter.
- Type: Hourly Contract - Location: Remote - Commitment: 10–40 hours/week
What You'll Do
* Design and implement high-fidelity robot models (URDF/MJCF) with accurate kinematics, dynamics, and contact properties * Build and maintain simulation environments using MuJoCo, NVIDIA Isaac Sim, and/or Gazebo * Develop end-to-end simulation pipelines for robot training, testing, and validation * Tune physics parameters — friction, damping, inertia, actuator models — to maximize sim-to-real transfer * Integrate simulations with ROS2 for perception, planning, and control workflows * Write clean, performant code in Python and/or C++ to support simulation infrastructure * Collaborate asynchronously with robotics researchers and engineers on model accuracy and environment design * Profile and optimize simulation performance for large-scale or parallelized runs * Document simulation configurations, model parameters, and pipeline architecture
Who You Are
* Strong hands-on experience with at least one major robotics simulator: MuJoCo, NVIDIA Isaac Sim, or Gazebo * Proficient in Python and/or C++ in a robotics or scientific computing context * Solid understanding of rigid-body dynamics, contact mechanics, and control theory * Experience creating and validating robot models (URDF, MJCF, or SDF formats) * Familiarity with ROS2 and its integration with simulation environments * Comfortable working with simulation pipelines — from environment setup to data collection and evaluation * Self-directed, detail-oriented, and effective when working independently * Strong problem-solving instincts and a drive to close the sim-to-real gap * Strong English communication skills (written collaboration is conducted in English)
Nice to Have
* Experience with domain randomization, sim-to-real transfer techniques, or reinforcement learning in simulation * Familiarity with GPU-accelerated simulation (e.g., Isaac Gym, MuJoCo MJX) * Background in legged locomotion, manipulation, or multi-body systems * Experience with CI/CD for simulation testing and automated validation * Knowledge of sensor simulation — cameras, LiDAR, IMUs, force/torque sensors * Contributions to open-source robotics or simulation projects * Graduate-level coursework or research in robotics, controls, or computational physics
Why Join Us
* Work on cutting-edge robotics simulation projects that directly impact how robots learn and perform * Fully remote and flexible — work when and where you're most productive * Freelance autonomy with technically challenging, meaningful work * Collaborate with a global community of robotics and AI professionals * Gain exposure to state-of-the-art simulation frameworks and research-grade problems * Potential for ongoing work and contract extension as new projects launch
Working with AlignerrPay, getting started and work, from Alignerr's own pages
What the platform publishes in general. These are not extra terms confirmed for this particular role.
- Getting paid
- Billed weekly, Monday to Sunday, with approved work paid by the following Friday, according to Labelbox's help center. Payment goes through Stripe Connect or PayPal depending on your location, with one provider per country. intercom.help/labelbox/en/articles/13600616-alignerr-paym..., alignerr.com/process
- Before your first paid task
- Sign up, apply, verify your identity, set up billing and onboard. Some jobs add a Zara AI interview or domain assessments. alignerr.com/process
- How much work
- Time to your first project depends on demand and your skills, and there is no minimum number of hours. alignerr.com/faqs
- Contract
- Independent contractor, under terms with ALIGNERR LLC. alignerr.com/faqs, alignerr.com/privacy
Read on the pages linked above on 24 Sep 2026. Platforms change these terms, so check the linked page before you rely on one.
How does the pay compare?Across Coding & software eval roles, not this role alone
From our own daily reads of every open listing on the platforms we follow, not from Alignerr's posting. How we count.
Pay across the field: Coding & software eval
Across 393 roles in this field with a stated hourly rate in US dollars, on 14 platforms, the middle half pays $65 to $120 an hour at the top of the range, and the median is $95. This role's top rate, $200, is in the top quarter. Of the 140 distinct rates we count, 133 are lower and 4 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr (this platform) | 136 | $50 to $400 · median $100 |
| micro1 | 46 | $35 to $350 · median $110 |
| Handshake AI | 43 | $47 to $125 · median $80 |
| Meridial (Invisible) | 34 | $22 to $150 · median $60 |
| Mercor | 33 | $60 to $200 · median $105 |
Sources and listing historyWhere this information comes from
This listing's history
- First seen here on 27 Aug 2026, and still on Alignerr's list when we last read it on 13 Oct 2026.
- The listed pay has not changed since then.
- Posted by Alignerr
- First seen by AIPayList
- Last seen live
- Listing ID
- 10c971ca-fcb0-4e56-9c6d-0f1af8275388
Pay as the source states it: “$180-200/hr”.
Platforms sometimes change a rate after posting. Every listing here is re-read at least once a day and corrected when its source moves, so a difference you see on the platform is usually a change made since the last read. How freshness works.
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