SW Engineeer - HIL Testing

Technical Talent Group; Berkeley (CA); On-site; USD 83,000 - 124,000; Full time

Job summary

Confidential Client in California is seeking a Software Engineer to help build out SIL/HIL test infrastructure for its Battery Management System hardware. This role sits at the intersection of software and hardware and requires hands-on development in a fast-moving startup environment.

You will write device drivers for lab test equipment, develop a Python-based framework to run automated tests, and collaborate with firmware and test teams to verify safety and performance before major product

Qualifications

• Experience building SIL/HIL test systems.
• Strong software background, especially writing drivers for hardware/test equipment.
• Proficient in Python.
• Ability to work independently in a fast-moving startup environment.
• Nice to have experience in automotive, EV, or battery tech.

Responsibilities

• Build SIL/HIL test infrastructure from the ground up.
• Write device drivers for lab test equipment.
• Develop a Python-based framework to run automated tests.
• Collaborate with firmware and test teams to verify safety and performance.

Skills

SIL/HIL experience

Python

Device drivers

Hardware testing

Tools

C programming

Job description

Software Engineer, SIL/HIL Test SystemsContract (6-9 months, with potential conversion to full-time) | On-site, California | Confidential ClientAbout the OpportunityOur client is a fast-growing energy storage technology company bringing next-generation battery systems to market. They're looking for a Software Engineer to help build out the test infrastructure that verifies their Battery Management System (BMS), the electronics that monitor and control the battery, before it ships to customers.This role sits at the intersection of software and hardware. You'll be building Software-in-the-Loop (SIL) and Hardware-in-the-Loop (HIL) test systems, simulation environments that let engineers safely and repeatedly test how the battery's control electronics respond to real-world conditions, without needing a live battery hooked up for every test.What You'll DoBuild out SIL/HIL test infrastructure from the ground up, including wiring, schematics, and instrumentationWrite device drivers that let software communicate with lab test equipment (instruments that inject voltages, read sensor data, and simulate real operating conditions)Build the software framework that allows test engineers to write and run automated test cases on top of that infrastructureWork closely with firmware and test engineering teams to verify product safety and performance ahead of major product launchesWhat We're Looking ForExperience building or working within SIL and/or HIL test systemsStrong software engineering background, particularly writing drivers or interfaces for hardware/test instrumentationProficient in PythonComfortable working independently in a fast-moving, ambiguous startup environmentNice to HaveFirmware development experienceBackground at an automotive, EV, or battery technology companyFamiliarity with CFamiliarity with UL 1998 or similar firmware safety/testing standardsDetailsLocation: On-site, California (relocation not provided)Type: Contract, with strong potential to convert to full-time for the right fitInterview process includes a technical screen, a Python coding exercise, and an on-site panel with the team