Staff Electrical Test Development Engineer – NPI

Mainspring Energy

Senior Test Development Engineer at Mainspring Energy designing automated testing architectures for low-emissions local power solutions. Requires strong experience in electrical engineering and test systems.

Posted 7/6/2026full-timeMenlo Park • California • 🇺🇸 United StatesLead💰 $157,250 - $185,000 per yearWebsite

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Establish Mainspring’s overall test strategy for circuit boards and electrical assemblies
Develop test requirements and translate them into a variety of testers, from manual screening tests to fully automated testers
Design and integrate complex hardware test fixtures, including mass interconnect solutions and swappable bed-of-nails systems
Determine which projects to insource and which to outsource. For outsourced projects, you will manage external partners that are developing and building testers
Deploy test systems at our manufacturing partners’ facilities to capture quality issues earlier in the build process
Drive test coverage improvements and manage technical escalations with contract manufacturers (e.g., optimizing Flying Probe, ICT, and AOI test coverage)
Collaborate with product design engineers to improve their designs for manufacturability (DFM), testability (DFT), and cost reduction
Validate test systems and production yields using statistical data analysis tools (e.g., GR&R, Cpk, SPC)

Requirements

What you’ll need

8+ years of experience with a Bachelor's degree, or 4+ years of experience with a Master's degree, in Electrical Engineering or a related field
Hands-on experience working as an electrical engineer or new product introduction (NPI) engineer developing and realizing electrical testers for manufacturing. You’re able to talk in detail about what, why, and how a tester design works
A strong understanding of I/O types, analog, digital, communication buses
Advanced experience with AOI, flying probe, and ICT testing methods
Experience developing test system documentation, including test requirements, schematics, coverage analysis, etc
Proven competency in a physical hardware lab environment setting up test benches, instrumenting hardware under test, and maintaining clean, safe laboratory testing practices
Software programming and development skills for automating electrical testers
A “collaborate-first” mindset and have successfully communicated across a range of teams and personalities
Prior experience implementing mass interconnect solutions, bed of nails fixtures, and electro-mechanical fixtures (preferred)
Familiarity with design validation testing, including developing test plans and executing testing (preferred)
Proficiency in test automation programming and scripting languages (e.g. LabView, LabWindows, TestStand and/or Python) (preferred)

Benefits

Comp & perks

pre-IPO stock options

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Electrical EngineeringTest System DocumentationTest Requirements DevelopmentAnalog and Digital CommunicationMass Interconnect SolutionsBed of Nails FixturesDesign Validation TestingTest Coverage AnalysisTest Bench SetupHardware Instrumentation

Soft Skills

Collaborate-First MindsetEffective Communication