---
title: 'Senior Software Engineer (Robotics OS Validation & Simulation) at Mujin'
canonical: 'https://feeny.ai/job/senior-software-engineer-robotics-os-validation-simulation-mujin-tokyo-jsmxwehmat97'
type: 'job'
last_seen: '2026-10-14'
---

# Senior Software Engineer (Robotics OS Validation & Simulation) at Mujin

- **Company:** Mujin
- **Location:** Tokyo, Japan
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-04-14
- **Last confirmed live:** 2026-10-14
- **Apply:** https://jobs.lever.co/mujininc/e8d03f67-65a6-441e-9226-72fc15bf53c3

## Job description

Mujin is a global leader in industrial automation, redefining supply chain efficiency through MujinOS—our intelligent operating system for robotics. At our core is Machine Intelligence (MujinMI), a unique approach that leverages real-time digital twins and advanced perception, planning, and control algorithms to achieve fully autonomous operations. Our flagship product, MujinController, empowers users with a highly configurable, no-code interface. By integrating cutting-edge motion planning and computer vision, it enables seamless automation for complex applications such as palletizing, picking, and truck unloading. Headquartered in Japan with a growing presence in the US, China, and Europe, we invite you to join a dynamic environment where you can shape the future of automation.

The Senior Software Engineer (Robotics OS Validation & Simulation) is responsible for validating the Mujin OS across our entire robotics ecosystem used in live warehouses and factories. In this role, you will design the automated testing architecture that ensures robotic systems behave correctly when deployed in real production environments. Rather than testing isolated components, you will validate how complete systems operate together—including robot arms, custom end-effectors, vision systems, conveyors, and other industrial equipment. Most validation is performed through large-scale simulation environments that reproduce real customer deployments. The test infrastructure runs continuously in automated environments to ensure Mujin OS continues to operate safely and reliably in production as the system evolves. This role is ideal for engineers who enjoy working on complex, real-world systems where software, hardware, networking, and physics intersect.

## Key Responsibilities

Testing Infrastructure

- Design and implement test automation frameworks that validate cross-functional behaviors of robotic systems within Mujin OS (e.g., vision-to-motion coordination, robot-to-conveyor synchronization).
- Build end-to-end test cases that simulate real customer deployments and operational workflows.
- Develop simulation components representing robots, sensors, conveyors, and warehouse systems.

System Validation & Debugging

- Analyze test results and system telemetry to detect behavioral issues or performance regressions.
- Work with cross-functional engineering teams to isolate and resolve system-level failures.

Technical Leadership

- Improve testing methodology and infrastructure across the engineering organization.
- Review code and mentor engineers in testing practices and quality engineering.

## Minimum Requirements

- BSc degree or higher in Computer Science, Computer Engineering, Robotics, or related fields (or equivalent academic or work experience).
- Proven experience developing production-quality software systems, not just test scripts.
- Proficiency in designing and implementing test automation frameworks and test cases for software systems.
- High proficiency in Python for developing test automation frameworks and test cases.
- Advanced Linux user with extensive experience in Linux software development.
- Business-level English communication skills.
- High motivation to deliver a high-quality robotics software platform and make a positive impact on the world.

## Preferred Qualifications

Robotics Systems

- Experience with robotics frameworks (ROS, OpenRAVE, or similar).
- Experience working with robotic simulation environments.

Software Systems

- Strong knowledge of distributed systems and inter-process communication.
- Experience with messaging systems (e.g., ZeroMQ).

Testing & Automation

- Advanced experience with Pytest.
- Experience building large-scale automated test systems.
- Experience with E2E frameworks (e.g., Playwright).

Others

- Familiarity with 3D programming and rendering pipelines.
- Proficiency in C++ or TypeScript.
- Business-level Japanese communication skills.

Why This Role?

- You will not be running repetitive manual tests or writing simple web automation. Instead, you will design the systems that validate how multiple machines—robots, sensors, conveyors, and software—interact in a shared physical workspace. Your work will ensure that complex robotic systems configured by customers operate reliably in real production environments.

Interview Process:

- Coding Assessment: Initial technical evaluation.
- HR Interview: Discussion with Human Resources.
- Hiring Manager Interview: One or two rounds with the hiring manager.
- Take-Home Assignment & Feedback Interview (If Applicable): A task to complete on your own, followed by a feedback session.

Location 3-8-5 Tatsumi, Koto-Ku, Tokyo 135-0053, Japan Work Hours 8:45 - 17:45 (with a 60-minute break) Salary Based on experience and skills Salary revision twice a year Additional bonuses are available based on performance Holidays Every Saturday and Sunday Annual paid leaves Maternity leave and Childcare leave Flex Holiday (take public holidays on days of your choice) Other holidays as defined by the company Company Benefits Explore Mujin Perks & Welfare Benefits Flexible dress code policy Commuting allowance Japanese Social Security (Health Insurance, Pension, Labor Insurance) Monthly team dinner support Free buffet lunch every workday Free vending machines (offering drinks and snacks) High-end coffee machine Exclusive Employee Gym Access Japan Relocation Support Visa sponsorship Flight ticket support Shipping expenses coverage up to a specified limit Assistance for housing

## About Mujin

## Company Overview
- **One-liner**: Mujin develops intelligent robotics automation platforms that use a "teachless" no-code approach to make robots capable, easy to deploy, and simple to operate in logistics, manufacturing, and beyond.
- **Entity Type**: Private (Series C)
- **Headquarters**: Tokyo, Japan
- **Founded**: 2011
- **Founders**: Ross Diankov (CEO), Issei Takino

## Core Business
- Primary industry: Industrial robotics and automation
- Target customers: Warehouses, distribution centers, manufacturers (primarily Enterprise and B2B); also serves robotics integrators
- Mission statement: To solve the shortage of manual labor by deploying intelligent robotics automation that raises productivity around the world

## Products & Services
- **MujinOS**: A no-code, teachless platform for robot control and deployment. Integrates perception, planning, and control algorithms with a real-time digital twin. Compatible with top robot and tooling brands.
- **Palletizing**: Automated case stacking with high-speed, stable pallet builds for any SKU mix.
- **Depalletizing**: Perception-driven robots that unload pallets and handle complex mixed-SKU challenges.
- **Mixed-Case Fulfillment**: Robotic case picking and pallet building for store-ready orders.
- **Bin Picking**: Robots pick loose items from bins using advanced 3D vision.
- **Piece Picking**: Each-pick automation for e-commerce and distribution.
- **TruckBot**: Container and trailer unloading robot (debuted at ProMat 2023).
- **Fleet Coordination**: Syncs AGVs and AMRs with pick-and-place workflows through a single fleet module.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed as a private company (latest major round was $83.4M Series C in 2023, per CB Insights).
- **Key Metric (Funding)**: Over $107.4M in total known equity funding (Series A: ¥75M JPY, Series B: $6M, Series C: $83.4M + $18M). Also secured ¥15.5B JPY in debt financing (Dec 2025).
- **Notable Investors**: SBI Investment (led Series C), UTEC (The University of Tokyo Edge Capital Partners).
- **Growth Signals**: Employs 146 people (+5% YoY, +17 people); offices in 5 countries (Japan, USA, China, Netherlands, South Korea); 103 active job postings (+49.3% YoY); revenue $6.9M; recognized with the RBR50 Innovation Award; operates in 9 countries by workforce distribution.

## Competitive Advantages
- **Teachless technology**: Their "MujinMI" (Machine Intelligence) allows robots to think and move autonomously without being taught every motion — a fundamental differentiator from traditional industrial robots that require programming.
- **No-code platform**: MujinOS enables deployment without writing code, lowering engineering costs and accelerating timelines.
- **Brand-agnostic integration**: Compatible with robots and tooling from multiple manufacturers, so it fits into existing operations without vendor lock-in.
- **Strong Asia + global footprint**: Deep roots in Japan and China combined with expanding operations in North America and Europe.

## Strategic Focus
- Continue expanding globally with offices in the Netherlands (Eindhoven) and a growing presence in the U.S. (Atlanta, GA).
- Scale intelligent robotics solutions for large logistics and manufacturing customers.
- Push further into full warehouse and factory workflows (e.g., TruckBot for automated unloading).
- Deepen the MujinOS platform as the global standard for intelligent robotics.

## Why Work Here
- **Mission-driven**: Tackling critical global labor shortages with cutting-edge technology.
- **Engineering-heavy culture**: 92 of 146 employees are in technical roles — a true engineering-first company.
- **Global, diverse team**: Colleagues from Japan, U.S., China, Netherlands, Switzerland, France, South Korea, and more.
- **Top talent hiring from**: Carnegie Mellon, Stanford, The University of Tokyo, plus alumni from Google, Microsoft, Woven by Toyota, and Preferred Networks.
- **On-site in Tokyo**: Most roles listed as full-time in Tokyo at their HQ, but also opportunities in Atlanta, Guangzhou, and Eindhoven.
- **Active growth**: 103 open jobs across software engineering (C++, Python, Computer Vision, Robotics), integration, and other roles.

## Sources
1. [mujin-corp.com](https://mujin-corp.com/company)
2. [mujin-corp.com](https://mujin-corp.com/)
3. [jobs.lever.co](https://jobs.lever.co/mujininc)
4. [linkedin.com](https://www.linkedin.com/company/mujin-global)
5. [cbinsights.com](https://www.cbinsights.com/company/mujin)

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