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Magnite • Los Angeles, California, United States
Salary: $120,000 - $130,000 / year
Role & seniority: Software Development Engineer in Test (SDET); seniority not specified
Languages: Java, Python, JavaScript, C#, or similar
Test frameworks/tools: Selenium, Playwright, Cypress, REST-assured, pytest, etc.
Focus areas: API/service/distributed system testing
CI/CD, version control (Git)
Design, develop, and maintain automated test frameworks for systems, services, and APIs
Write reliable automated tests (functional, integration, regression, end-to-end) and maintain test plans
Collaborate with engineers to embed testing, improve CI/CD with quality gates, and continually evaluate/testing tooling
SDET/QA or software engineer with test ownership; strong automation focus
Proficiency in one or more programming languages
Experience with test automation frameworks/tools and API/distributed system testing
Solid software fundamentals, data structures, debugging
Familiarity with CI/CD and Git; cross-functional collaboration and strong communication
Cloud experience (AWS, GCP, Azure)
Performance/load/reliability testing
Containerization/orchestration (Docker, Kubernetes)
Experience in Agile/Scrum environments
Location & work type: Los Angeles, CA; Hybrid schedule (remote Mon/Fri; in-office Tue–Thu)
Software Development Engineer in Test (SDET)
Los Angeles, CA
Hybrid Schedule (M/F remote, T/W/TH in-office)
At Magnite, we cultivate an environment of continuous growth and collaboration. Our work impacts what millions of people read, watch, and buy, and we’re looking for people to help us tackle that responsibility with creativity and focus. Magnite (NASDAQ: MGNI) is the world’s largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV / streaming, online video, display, and audio. Our tech fuels billions of transactions per day!
About This Team
We are looking for a Software Development Engineer in Test (SDET) to help ensure the quality, reliability, and scalability of our systems and services. In this role, you will design, build, and maintain automated testing solutions while working closely with software engineers, product managers, and other stakeholders. You’ll play a key role in improving test coverage, catching issues early, and enabling teams to ship high-quality software with confidence.
In This Role You Will
Design, develop, and maintain automated test frameworks for multiple systems, services, and APIs Write reliable, maintainable automated tests (functional, integration, regression, and end-to-end) Collaborate with software engineers to embed testing best practices throughout the development lifecycle Participate in requirements and design reviews to provide a quality and testability perspective Execute and maintain test plans for complex, distributed systems Investigate, troubleshoot, and clearly document defects and test failures Improve CI/CD pipelines by integrating automated tests and quality gates Continuously evaluate and improve testing tools, frameworks, and processes
We’re Looking For Someone With
Experience as an SDET, QA Engineer with strong automation focus, or Software Engineer with test ownership Strong programming skills in one or more languages (e.g., Java, Python, JavaScript, C#, or similar) Hands-on experience with test automation frameworks and tools (e.g., Selenium, Playwright, Cypress, REST-assured, pytest, etc.) Experience testing APIs, services, and distributed systems Solid understanding of software development fundamentals, data structures, and debugging Familiarity with CI/CD systems and version control (e.g., Git) Ability to work across multiple systems and collaborate effectively with cross-functional teams Strong communication skills and a proactive approach to quality
Nice To Have
Experience with cloud platforms (AWS, GCP, Azure) Experience with performance, load, or reliability testing Knowledge of containerization and orchestration tools (Docker, Kubernetes) Experience working in Agile/Scrum environments
Perks And Benefits
Comprehensive Healthcare Coverage from Day One Generous Time Off Holiday Breaks and Quarterly Wellness Days Equity and Employee Stock Purchase Plan Family-Focused Benefits and Parental Leave 401k Retirement Savings Plan with Employer Match Disability and Life Insurance Cell Phone Subsidy Fitness and Wellness Reimbursement
Company Culture
We believe collaboration is essential to success. Magnite’s hybrid schedule includes two days worked remotely (Monday and Friday) and three days on-site (Tuesday, Wednesday and Thursday). Our offices provide catered lunches, beverages, snacks, training and development, and office events to support your work week. We also understand you have appointments, families, hobbies, and other commitments. Magnite strives to maintain a healthy work/life integration for all employees so you can bring your best every day - both at work and at home.
Community Service and Volunteer Events Company-Matched Charitable Contributions Wellness Coach and Mental Health Support Career Development Initiatives and a Career Growth Framework Culture and Inclusion Programs Bonusly Peer-to-Peer Recognition Program
About Us
The world's leading agencies and brands trust our platform to access brand-safe, high-quality ad inventory and execute billions of advertising transactions each month. Anchored in bustling New York City, sunny Los Angeles, mile-high Denver, historic London, and down under in Sydney, Magnite has offices across North America, EMEA, LATAM, and APAC.
In CA, the base salary range for this position is: $120,000 - $130,000 in addition to an annual variable bonus based on performance and company equity (NASDAQ: MGNI).
For Los Angeles-based Applicants
Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.
Job Duties
Having access to the Company’s Confidential Information or trade secrets including data related to customers, clients, vendors, business partners, or suppliers Work with cross teams to access datasets, databases, formulas, algorithms, tools, products, prototypes, systems applications, and technologies in any stage of development
Magnite is an Equal Opportunity Employer and does not discriminate against applicants due to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation or any other federal, state or local protected class.
Our Commitment: We aim to incorporate a wide range of voices into our Magnite culture, cultivating an environment where employees feel welcomed, cared for, and encouraged to freely share ideas. We are committed to employee growth, collaboration, inclusion, and innovation. We invest in Magnite’s local communities. We seek talent from all backgrounds to champion corporate values of seeing the big picture and being catalysts of change.
Want to learn more about us?
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Recruiting Agency Notice
Magnite does not accept agency resumes and is not responsible for any fees related to unsolicited resumes.