Remote Robotics Simulation Engineer — Sim-to-Real Expert

Alignerr Corp.; Seattle (WA); Remote; USD 55,000 - 96,000; Part time

Benefits offered by this job

Fully remote

Flexible hours

Contract work

Job summary

Alignerr Corp. is seeking a Robotics Simulation Engineer to design, build, and optimize high-fidelity robot simulations bridging virtual environments and real systems.

You will create pipelines for learning, controls development, and hardware validation using MuJoCo, Gazebo, or Isaac Sim, with Python and/or C++ in a remote, flexible contract role. This fully remote, freelance-style position offers 10–40 hours per week and asynchronous collaboration with robotics researchers across projects,

Qualifications

• Hands-on with at least one major robotics simulator (MuJoCo, Isaac Sim, or Gazebo).
• Proficient in Python and/or C++ in 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).
• Familiarity with ROS2 and integration with simulation environments.

Responsibilities

• 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.

Skills

Python

C++

Robotics simulation

URDF/MJCF/SDF

ROS2

Kinematics & dynamics

Tools

MuJoCo

NVIDIA Isaac Sim

Gazebo

ROS2

Job description

Alignerr Corp. is seeking a Robotics Simulation Engineer to design, build, and optimize high-fidelity robot simulations bridging virtual environments and real systems.

You will create pipelines for learning, controls development, and hardware validation using MuJoCo, Gazebo, or Isaac Sim, with Python and/or C++ in a remote, flexible contract role. This fully remote, freelance-style position offers 10–40 hours per week and asynchronous collaboration with robotics researchers across projects,