---
title: 'Sr. Test Automation Engineer (SIL/HIL Infrastructure) at 42dot'
canonical: 'https://feeny.ai/job/sr-test-automation-engineer-sil-hil-infrastructure-42dot-sunnyvale-wac1k6agdcva'
type: 'job'
last_seen: '2026-10-14'
---

# Sr. Test Automation Engineer (SIL/HIL Infrastructure) at 42dot

- **Company:** [42dot](https://feeny.ai/companies/42dot)
- **Location:** Sunnyvale, CA
- **Employment:** full-time
- **Posted:** 2026-06-19
- **Last confirmed live:** 2026-10-14
- **Apply:** https://jobs.ashbyhq.com/42dot/3d96a60d-be22-4d72-a50a-320e79d1b21c/application

**Skills:** Python, Bash, C, Pytest, OpenHTF, Docker, Git, CI/CD, SIL, HIL, MIL, CAN-FD, LIN, Automotive Ethernet, UDS, DoIP, Linux, CAN, Ethernet

> Design, develop, and execute automated test frameworks for complex automotive Electronic Control Units (ECUs) and virtual ECUs. The role involves building custom HIL testing stations, managing SIL/HIL environments, and integrating test loops into CI/CD pipelines within a GNU/Linux ecosystem.

## Job description

We are looking for the best

## About Us

42dot is a mobility AI company committed to solving mobility challenges with software and AI. As the Global Software Center of Hyundai Motor Group, 42dot pioneers the future of mobility by advancing the development of software-defined vehicles. We develop safety-first, user-centric software-defined vehicle technologies that deliver the latest performance through continuous updates like smartphones. By advancing software and AI technology, 42dot envisions a world where everything is connected and moves autonomously through a self-managing urban transportation operating system.

## About the Role

As a Senior / Staff Test Automation Engineer you will design, develop, and execute automated test frameworks for complex automotive Electronic Control Units (ECUs) and virtual ECUs (vECUs). This role bridges the gap between low-level firmware and high-level vehicle applications. You will own the end-to-end automation pipeline across Software-in-the-Loop (SIL) and Hardware-in-the-Loop (HIL) environments, which includes building custom HIL testing stations from scratch. Operating within a GNU/Linux ecosystem, you will investigate complex system requirements to develop robust, fail-safe test content for our next-generation Software-Defined Vehicle (SDV) platform. Responsibilities

## Responsibilities

- Automation Framework Development: Design, build, and maintain scalable automated test frameworks and scripts for embedded automotive systems using Python and C/C++.
- HIL Bench Generation: Configure and build custom physical HIL test benches from the ground up, integrating real vehicle ECUs with simulated real-time environment models.
- Requirements Investigation: Analyze and interpret technical specifications to author comprehensive automated test suites, actively tracking down gaps in system requirements.
- Multi-Environment Execution: Execute automated test suites across SIL, MIL, and HIL setups.
- Analyze test captures, isolate low-level system failures, and generate detailed engineering reports.
- Protocol Verification: Validate automotive communication networks, network topologies, and diagnostic routing (e.g., CAN-FD, LIN, Automotive Ethernet, UDS, DoIP).
- CI/CD Integration: Integrate automated test loops directly into Git-driven CI/CD pipelines (such as GitLab CI or Jenkins) to support high-frequency regression farm execution.
- Cross-Functional Collaboration: Partner with Firmware, Systems Architecture, Quality, and TPM teams to define test specifications and maintain complete ASPICE-compliant requirement traceability.

## Qualifications

- Education: Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, Computer Science, or a related field.
- Experience: 5+ years (Senior) or 8+ years (Staff) of hands-on experience in test automation for high-integrity embedded systems.
- Programming Mastery: Expert-level proficiency in Python and Bash scripting, alongside a practical reading knowledge of C for code-level debugging.
- Automation Toolchains: Direct experience architecting or heavily extending modern pythonic test frameworks (such as Pytest or OpenHTF).
- Containers: Experience with Docker

## Preferred Qualifications

- Linux Expertise: Advanced user-level comfort navigating, configuring, and scripting within GNU/Linux environments.
- Version Control: Advance user-level with Git and modern branch management strategies.
- Network & Diagnostic Diagnostics: Deep technical understanding of automotive network protocols (CAN, LIN, Ethernet

Interview Process

- Application Review - Coding Test - 1st interview - 2nd interview - Offer Negotiation - Hiring
- The screening procedures may vary depending on the position, schedule, or other circumstances. You will be individually notified of the screening schedule and results via the email address provided in your application.

## Compensation

- $185,000 - $250,000

Additional Information

- In accordance with fair hiring practices, do not include any personal information unrelated to your job qualifications (e.g., Social Security Number, family relations, marital status, age, photo, physical condition, place of birth, etc.) in your resume.
- All documents must be submitted in PDF format and under 30MB in size.
- If you experience issues uploading your resume, please send it along with the job posting URL to recruit@42dot.ai.
- We strongly encourage applications from U.S. veterans and candidates eligible for employment preference under applicable laws.
- Qualified individuals with disabilities are encouraged to apply and will receive consideration under the Americans with Disabilities Act (ADA).
- 42dot does not accept unsolicited resumes and will not pay fees for any such submissions. Equal Opportunity Statement
- 42dot is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees, regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status.

※ Please review the following information before applying.

- How to work in 42dot, [About 42dot Way →](https://42dot.ai/careers/way)

## About 42dot

## Company Overview
- **One-liner**: 42dot is a mobility AI company building software‑defined vehicles (SDV), autonomous driving platforms, and AI‑powered mobility services, operating as the global software center for Hyundai Motor Group.
- **Entity Type**: Private (subsidiary of Hyundai Motor Company; acquired in 2022)
- **Headquarters**: Seongnam‑si, Gyeonggi‑do, South Korea (also offices in Sunnyvale, USA and Warsaw, Poland)
- **Founded**: 2019 (originally named CODE42.ai)
- **Founders**: Not publicly available

## Core Business
- **Primary industries**: Automotive, Mobility, Artificial Intelligence, Software‑Defined Vehicle (SDV), Autonomous Driving
- **Target customers**: B2B (Hyundai Motor Group, OEMs, fleet operators); B2C (via the TAP! autonomous mobility platform)
- **Mission / purpose**: “We envision a world where everything is connected and moves autonomously through a self‑managing urban transportation operating system.” [42dot.ai](https://www.42dot.ai/)

## Products & Services
- **Software‑Defined Vehicle (SDV)**: Core technology that enables continuous over‑the‑air updates and data‑driven services, turning vehicles into programmable platforms. [42dot.ai](https://www.42dot.ai/)
- **Autonomous EV (AEV)**: Autonomous electric vehicles developed with SDV technology for safer, new mobility experiences. [42dot.ai](https://www.42dot.ai/)
- **TAP! (Autonomous Mobility Platform)**: A unified platform for autonomous ride‑hailing and shuttle services, aimed at popularizing autonomous mobility. [42dot.ai](https://www.42dot.ai/)
- **42dot LLM**: A large language model for Korean‑English integrated understanding, built on proprietary data and infrastructure, outperforming comparable‑sized models. [42dot.ai](https://www.42dot.ai/)
- **Data Platform**: Connects vehicle, road, and transportation data to enable smart mobility services. [42dot.ai](https://www.42dot.ai/)
- **Fleet Management & On‑Demand Shuttle**: Services for efficient fleet operation and demand‑responsive transportation. [cbinsights.com](https://www.cbinsights.com/company/code42ai)

## Market Standing
- **Valuation / Market Cap**: Not disclosed (private subsidiary)
- **Key Metric (Total Funding)**: ~$458.72M raised to date across multiple rounds (conflicting reports indicate a much higher figure – LinkedIn lists $501.4B, likely a data error). [cbinsights.com](https://www.cbinsights.com/company/code42ai) / [kr.linkedin.com](https://kr.linkedin.com/company/42dot)
- **Notable Investors / Partners**: Hyundai Motor Company, Kia Motors, POSCO Capital, Shinhan Financial Group, WE Ventures. Hyundai Motor Company acquired 42dot in August 2022 for ~$349M. [cbinsights.com](https://www.cbinsights.com/company/code42ai)
- **Growth Signals**:
  - **Employees**: ~506 (as of early 2026), monthly headcount growth of +1.1%. [kr.linkedin.com](https://kr.linkedin.com/company/42dot)
  - **Job postings**: 105 active openings; quarterly job growth +18%. [kr.linkedin.com](https://kr.linkedin.com/company/42dot)
  - **Global footprint**: Offices in South Korea, USA, Poland, Vietnam, Thailand, Australia. [kr.linkedin.com](https://kr.linkedin.com/company/42dot)
  - **Patents**: 51 filed, covering autonomous cars, neural networks, and automotive technologies. [cbinsights.com](https://www.cbinsights.com/company/code42ai)

## Competitive Advantages
- **Hyundai Motor Group Backing**: Full integration with a top‑5 global automaker provides resources, manufacturing capability, and a ready market for SDV and autonomous technologies.
- **End‑to‑End SDV Stack**: Owns the full stack from vehicle E/E architecture and OS to cloud platform and AI models (42dot LLM), enabling rapid iteration and differentiation.
- **Proprietary AI & Data**: In‑house large language model and data platform give a unique edge in mobility AI.
- **First‑Mover in Korean Autonomous Mobility**: TAP! platform positions 42dot to lead the domestic autonomous ride‑hailing market.

## Strategic Focus
- Accelerate the transition to software‑defined vehicles across Hyundai Group.
- Scale TAP! autonomous mobility services to achieve mass adoption.
- Deepen AI capabilities (LLM, active learning, perception) for both vehicle and fleet intelligence.
- Expand global engineering presence (Poland, USA) to attract top talent and serve international markets.

## Why Work Here
- **Mission‑driven**: Work on the future of mobility – SDV, autonomous driving, and AI – at the intersection of automotive and software.
- **Hybrid / Remote Flexibility**: Some roles are listed as “Remote or Hybrid”; many positions at the South Korea HQ are in‑office, while offices in Sunnyvale and Warsaw offer hybrid options. [builtin.com](https://builtin.com/company/42dot)
- **Employee Sentiment**: Employer rating of **3.9 / 5.0** on LinkedIn (24 reviews), with compensation at 3.6, culture at 3.5, and work‑life balance at 3.4. [kr.linkedin.com](https://kr.linkedin.com/company/42dot)
- **Engineering Culture**: Heavy technical workforce (>34% engineers), with talent from top firms like Hyundai Motor, Samsung, Naver, and Kakao.
- **Growth Opportunities**: Rapidly expanding engineering team (18% quarterly job increase), global exposure, and chances to work on cutting‑edge AI and automotive tech.

## Sources
1. [42dot.ai](https://www.42dot.ai/)
2. [42dot.ai Company page](https://42dot.ai/company)
3. [builtin.com – 42dot Careers & Culture](https://builtin.com/company/42dot)
4. [kr.linkedin.com – 42dot Company Profile](https://kr.linkedin.com/company/42dot)
5. [cbinsights.com – 42dot Profile](https://www.cbinsights.com/company/code42ai)

## Other roles at 42dot

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- [Reinforcement Learning Engineer (Autonomous Driving)](https://feeny.ai/job/reinforcement-learning-engineer-autonomous-driving-42dot-pangyo-software-dream-c2xnfeay3f29) — Pangyo Software Dream Center South, South Korea
- [AI Agent Engineer (Autonomous Driving)](https://feeny.ai/job/ai-agent-engineer-autonomous-driving-42dot-pangyo-software-dream-center-south-9kcn9w2zrspw) — Pangyo Software Dream Center South, South Korea
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- [Senior Security & Privacy Manager](https://feeny.ai/job/senior-security-privacy-manager-42dot-pangyo-software-dream-center-south-deg8qss3yha0) — Pangyo Software Dream Center South, South Korea
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