Software Development Engineer in Test (SDET) jobs in United States
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Quilt · 2 months ago

Software Development Engineer in Test (SDET)

positionRedwood City, CA
timeFull-time
remoteOnsite
seniorityMid, Senior Level
money$150K/yr - $200K/yr
date4+ years exp

Quilt is a company focused on creating efficient heating and cooling systems to combat climate change. They are hiring an SDET to build and scale test infrastructure for their heat pump products across embedded systems, cloud services, and mobile platforms, aiming to automate manual testing processes and enhance the productivity of the engineering team.

Heating Ventilation and Air Conditioning (HVAC)Home ImprovementHome ServicesInternet of ThingsSmart Home
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H1B Sponsor Likelynote

Responsibilities

Build and maintain CI/CD pipelines for embedded, cloud, and mobile testing (GitHub Actions, Bazel)
Extend hardware-in-the-loop (HIL) test infrastructure for device commissioning, OTA updates, and telemetry validation
Develop device simulators and mocks to reduce hardware dependencies in testing
Automate repetitive manual test scenarios into regression suites (e.g., pairing flows, firmware upgrades, cloud integration)
Create reusable test fixtures and libraries that make it easy for engineers to write tests
Debug and eliminate flaky tests; improve CI reliability and speed
Build test fixtures, utilities, and templates that make it easy for embedded engineers to write tests
Design testable interfaces and mock layers for device features
Provide C++ test examples (gtest) for common embedded patterns
Collaborate on architecture decisions to ensure new features can be tested efficiently
Improve developer experience around writing and running tests locally and in CI
Document testing patterns and best practices for embedded systems
Perform hands-on testing of critical release scenarios (device pairing, OTA, mobile app integration)
Validate firmware changes with automated and exploratory testing
Support mobile app testing (iOS/Android) for key user flows
Triage and reproduce customer-reported issues for engineering teams

Qualification

PythonCI/CD pipeline developmentHardware-in-the-loop testingAPI testingSQL/database testingDevice simulatorsPassion for electrificationCommunicationProblem-solving skillsSelf-motivated

Required

4-6 years of SDET or test automation experience, ideally with IoT, embedded systems, or hardware products
Strong Python for test automation (pytest framework highly preferred)
Experience with hardware-in-the-loop (HIL) testing or device integration testing
CI/CD pipeline development and maintenance (GitHub Actions, CircleCI, or similar)
Comfortable with Linux/Unix environments and shell scripting
Experience influencing engineering practices—you've convinced developers to refactor code for testability
API testing for REST/gRPC services
SQL/database testing for telemetry or time-series data validation
Strong debugging and problem-solving skills for complex hardware/software systems
Excellent communication and collaboration skills
Self-motivated with ability to work independently and identify infrastructure gaps
Passion for electrification and home automation
Strong mission alignment around climate and decarbonization

Preferred

Experience testing firmware OTA updates or device provisioning flows
Understanding of device communication protocols (Modbus, serial, gRPC)
Experience with device simulators, emulators, or virtual test environments
Mobile device testing experience (Appium for iOS/Android)
Basic Docker and containerization knowledge
Comfortable reading/modifying C++ test code (gtest) when needed
Bazel build system experience
Experience with HVAC systems or similar IoT domains
Embedded Linux or Raspberry Pi test development
Web E2E automation (Cypress/Playwright) for dashboards
Knowledge of time-series databases (TimescaleDB/PostgreSQL)

Benefits

Meaningful equity
Top-tier health benefits

Company

Quilt

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Quilt provides a home climate system featuring ductless heat pumps, room controls, and smart-home software for heating and cooling.
dateFounded in 2022
location
Redwood City, California, USA
people-size11-50 employees
web-link
https://www.quilt.com

H1B Sponsorship

Quilt has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (2)
2024 (1)
2023 (1)

Funding

Current Stage
Growth Stage
Total Funding
$62M
2025-12-08Series B· $20M
2024-04-16Series A· $33M
2023-05-16Seed· $9M

Leadership Team

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Paul Roland Lambert
Founder & CEO
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Recent News

pv magazine USA
Quilt launches 3-zone ductless heat pump for residential applications
2026-01-09
alleywatch.com
The Weekly Notable Startup Funding Report: 12/15/25
2025-12-16
Built In
Quilt Raises $20M Series B to Expand Its Eco-Friendly HVAC Tech
2025-12-16
Company data provided by crunchbase