Senior Software Engineer II

About Us

User Testing is the leader in human insight, helping organizations craft exceptional customer experiences through fast, actionable feedback. With a global participant network, AI‑powered analysis, expert services, and seamless integrations, we empower teams to build, launch, and improve products with real human perspectives.

Full Stack Engineer with 5+ years experience to join our growing technology organization. As a Full Stack Developer on the Testing team, you’ll design and build scalable features across front‑end and back‑end systems, collaborating with cross‑functional partners to turn user needs into high‑quality solutions.

• Design and build reliable, scalable engineering solutions to support growing usage.
• Collaborate with the team to deliver high‑quality software to production.
• Contribute to system architecture, sharing technical context and defending proposals.
• Bring fresh ideas across front‑end, back‑end, and software strategy.
• Write clear documentation to support smooth implementation.
• Tackle complex challenges while promoting best practices, clean code, and effective reviews.

• Ability to design, develop, and maintain both front‑end and back‑end systems that are scalable, reliable, and performant.
• Strong back‑end skills with Ruby and Node.js, plus front‑end experience using Type Script/React.
• Ability to work within existing architectures with a focus on consistency, maintainability, and delivery.
• Comfortable writing clear documentation, contributing to code reviews, and ensuring high‑quality standards.
• Able to troubleshoot issues across the stack, understand existing systems quickly, and propose effective solutions.
• A collaborative team player who values feedback, clean code, and continuous improvement.
• Experience with Test‑Driven Development (TDD) or Behavior‑Driven Development (BDD) is a plus. At a minimum, we’re looking for someone who actively promotes and applies unit testing as part of their day‑to‑day development practices.
• Strong collaboration and communication skills in cross‑functional teams.
• A proven track record of delivering production‑ready software in a timely manner.
• Fluent in English.

• A mission‑driven environment focused on human understanding and purpose‑led innovation.
• Inclusive culture that celebrates diverse experiences, identities, and voices.
• Employee Assistance Program (EAP)
• Health Insurance
• Employee Referral Program
• Professional Development Stipend
• Remote work stipend
• Wellness reimbursement
• Volunteer days to support your community involvement

User Testing is an Equal Opportunity Employer and a proud participant in the U.S. Federal E‑Verify program. We welcome people of all backgrounds, abilities, and experiences, and are committed to fostering a workplace where everyone belongs and thrives. Qualified applicants with criminal histories will be considered in accordance with the San Francisco Fair Chance Ordinance, as applicable.