76 api test engineer jobs at 54 companies in Lennox, CA
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Principal Test Engineer/Test Lead
Northridge, California, United States
$121k-$205k/yr OnsiteFull Time
10+ YOEBachelor's degree plus 10+ years (or advanced degree plus 8+ years) in testing/quality engineering; expertise in mobile, cloud, API, BLE, test automation, CI/CD, V&V, and regulated medical device environments.
Appium, Selenium, CI/CD
4d
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Senior AI Test Automation Engineer
Long Beach, California, United States
OnsiteFull Time
6+ YOEBachelor's degree or equivalent experience, 6+ years of software engineering and test automation experience, JavaScript/Node.js, Cypress, Playwright, API testing, CI/CD, LLMs, and AI-assisted testing workflows.
Cypress, Playwright, JavaScript, Node.js, TypeScript, GitHub Actions, Jenkins, GitLab CI, OpenAI, Anthropic, GitHub Copilot, Claude Code, Claude Cowork, Cursor, Selenium, Appium, Jest, Puppeteer, Express, Next.js, React, k6, JMeter, Lighthouse, AWS, Azure, GCP, MCP
1w
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Staff Software Test Engineer
San Diego or Irvine
$145k-$175k/yr OnsiteFull Time
10+ YOEBachelor's degree in computer science or related field; 10+ years of firmware testing and 15+ years in related fields; automation, mobile/cloud integration, BLE, REST APIs, Java, Agile, and regulated software experience.
Appium, XCUITest, UIAutomator, Page Object Model, RESTful APIs, Java, Bluetooth Low Energy, FSA, HSA, Microsoft 401(k)
2w
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Lead Software Engineer in Test
Los Angeles or Nashville or New York City or Portland or United States
$160k-$180k/yr RemoteFull Time
10+ YOE10+ years in test automation, architecting testing practices, strong coding ability, experience with Playwright/Cypress/Selenium, API/contract testing, performance testing, CI/CD and AI-assisted testing.
Playwright, Cypress, Selenium, FUGA, Zendesk, Trolley, ArgoCD, Kubernetes, .NET, Next.js, k6, JMeter, Gatling, Locust
3w
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Senior Software Engineer in Test
Irvine, California, United States
$157k-$185k/yr OnsiteFull Time
5+ YOE5+ years software engineering experience; strong TypeScript/JavaScript skills; deep Playwright experience; CI/CD pipeline management; testing for web APIs and complex simulation/hardware interactions.
Playwright, TypeScript, JavaScript, REST, GraphQL, GitHub Actions, GitLab CI, CircleCI, Docker, AWS, GCP
15h
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Software Engineer I Test
Brea or United States
$77k-$142k/yr RemoteFull Time
0+ YOEBachelor's degree or equivalent experience, completion of Mercury's Summer 2026 internship, and new graduate or 2+ years of industry experience. Requires programming, test automation, cloud, containerization, CI/CD, API, and performance testing skills.
Java, Python, JavaScript, AWS, Google Cloud, Azure, Selenium, TestNG, JUnit, Appium, IDE, Metrics, Docker, Kubernetes, Jenkins, GitHub, Postman, SoapUI, Curl, Insomnia, JMeter, LoadRunner
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Software Integration Test Engineer -SCADA
Irvine or Houston
$65k-$105k/yr HybridFull Time
2+ YOE2+ years testing software integrations or enterprise/industrial applications; REST API and OPC UA familiarity; basic power systems understanding; strong troubleshooting and communication; U.S. work authorization required.
Postman, Swagger, Insomnia, OPC UA, Wireshark, Fiddler, JSON, XML, SQL, Python, PowerShell, Jira, REST APIs, OAuth
2w
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Software Development Engineer in Test (SDET)
New Braunfels or Orange
$95k-$110k/yr HybridFull Time
3+ YOEBachelor's degree or equivalent experience; 3+ years in software testing or development with test automation; programming, .NET testing, automation frameworks, APIs, CI/CD, and analytical skills.
Java, C#, Python, JavaScript, .NET, Playwright, Selenium, Cypress, REST, GraphQL, Jenkins, GitHub Actions, Azure DevOps, Docker, AWS, Azure, Agile, Scrum, E-Verify, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
3mo
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Software Development Engineer in Test
United States or Irvine
$103k-$134k/yr RemoteFull Time
4+ YOE4+ years in test automation for UI/API; strong Python and JavaScript; Selenium/Playwright; CI/CD; Docker/Kubernetes; AWS; SQL; focus on testability, robustness, and performance.
Python, JavaScript, pytest, Selenium, Playwright, Locust, Git, GitLab CI, Jenkins, Docker, Kubernetes, AWS, Unix, Linux, Mac OS, Bash, PowerShell, SQL, Ansible
1mo
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Software Development Engineer in Test II (SDET Contractor)
Los Angeles, California, United States
$52-$78/hr OnsiteContract
Hands-on automation experience building UI and API tests in Python (3.11) with pytest, experience with Appium or Selenium, API testing (requests/Postman), Jenkins, Git, and test management tools; strong test design and troubleshooting skills.
Python 3.11, pytest 7, Appium 2, Selenium 4, requests, Postman, Jenkins, Git, qTest, TestRail
1mo
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Software Development Engineer in Test Contractor (SDET Contractor)
Los Angeles, California, United States
$58-$72/hr OnsiteContract
3+ YOEBachelor's degree or equivalent practical experience; 3+ years in software quality engineering, test automation, or development; strong Java, JUnit, REST API, Git, and CI/CD experience.
Java, JUnit, JUnit5, REST, gRPC, OpenAPI, Swagger, Git, Jenkins, GitHub Actions, Spring Boot, IntelliJ IDEA, Splunk, AWS, Python, Node.js, JavaScript, HTML, CSS
1mo
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Engineer II - Gas Utilities
Los Angeles, California, United States
$40-$50/hr HybridFull Time
4+ YOEBachelor's in engineering, 4+ years ILI gas utility experience, Direct Assessment and pressure testing experience, proficiency with integrity assessments and technical documentation, AMPP/CP/API familiarity, EIT preferred.
Microsoft Office
2mo
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Engineer II - Gas Utilities
Los Angeles, California, United States
$40-$50/hr HybridFull Time
4+ YOEBachelor's in engineering required, 4+ years gas utility ILI engineering experience, experience with integrity/direct assessments and pressure testing, proficiency in AMPP/CP1/CPs/CP3/API 579, Microsoft Office skills.
Microsoft Office
15h
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Wireless System Engineer
Cupertino or Irvine or San Diego
OnsiteFull Time
10+ YOEBachelor's degree and 10+ years of industry experience. Requires wireless communications, channel propagation, RF design, transceiver algorithms, test/API-driven development, and C/C++/Python skills.
C, C++, Python, TCP/IP
1mo
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Integration Engineer - High Voltage Los Angeles, CA
Los Angeles, California, United States
$110k-$145k/yr OnsiteFull Time
5+ YOE5+ years validation/integration experience for connected infotainment, VWAG vehicle integration knowledge, engineering degree, strong communication, test and resource management, knowledge of CAN/MOST/Ethernet/FlexRay.
CAN, MOST, Ethernet, FlexRay, APIs, MQTT, Cloud Infrastructure
2mo
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Senior Java Engineer
Santa Monica, California, United States
$101k-$187k/yr OnsiteFull Time
5+ YOE5+ years backend engineering experience with Java and Spring/Spring Boot; experience building APIs, microservices, cloud/distributed systems, relational data, testing, CI/CD, and containerized deployments; mentoring ability.
Java, Spring, Spring Boot, REST, APIs, Microservices, CI/CD
1mo
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Sr. Software Engineer
Lake Forest, California, United States
OnsiteFull Time
5+ YOE5+ years software engineering experience; strong JavaScript/TypeScript and React; experience with micro-frontends, frontend SDKs, REST API integrations, and automated testing (Jest, Cypress, Playwright).
JavaScript, TypeScript, React, Jest, Cypress, Playwright, REST APIs
1mo
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Software Engineer
Columbus or Boston or Chicago or Austin or Los Angeles or United States or Canada or United Kingdom or Australia
$125k-$165k/yr HybridFull Time
2+ YOE2+ years building web applications, backend services, or APIs. Experience using AI agents in engineering workflows, testing and CI/CD, and familiarity with PHP/Laravel, Vue.js, AWS Serverless, MySQL, or DynamoDB is a plus.
Claude Code, Cursor, PHP, Laravel, Vue.js, MySQL, DynamoDB, Kubernetes, AWS, Serverless, CI/CD, lambdas
1w
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Sr. Software Engineer
Irvine or Los Angeles or Seattle
$150k-$180k/yr OnsiteFull Time
Full-stack engineer modernizing production systems and building AI capabilities with Java, Go, JavaScript, BigQuery, GCP, REST APIs, databases, automated testing, and end-to-end project ownership.
Java, Go, JavaScript, BigQuery, Cloud Storage, MySQL, REST APIs, FTP, YAML, GCP, Docker, Kubernetes, GKE, GitHub Actions, Python, Tomcat, JSP, CodeMirror, Chart.js, MCP, LLMs
3d
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Senior Software Engineer
Burbank, California, United States
$170k-$200k/yr HybridFull Time
5+ YOERequires 5+ years of software engineering experience, strong Python and backend/API development skills, AI/ML integration experience, testing and CI/CD proficiency, and knowledge of asynchronous programming and microservices.
Python, FastAPI, Flask, Django, REST APIs, OpenAI, LangChain, Hugging Face, AWS Bedrock, Vertex AI, NLP, OCR, RPA, CI/CD, Temporal, Step Functions, Airflow, AWS, GCP, Azure
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