Staff Quality Engineer
stackadapt
If you want to shape how AI products get built from the ground up, this is a rare early-career opportunity. StackAdapt is hiring a Staff Quality Engineer to own quality strategy for intelligent systems—meaning you'll be the person deciding how the company tests and ships AI features that drive real business results. Most people don't get this level of technical leadership until much later in their career.
Your day-to-day work includes designing testing frameworks for non-deterministic AI systems, building the tooling that makes LLM-powered features testable, and working across agile teams to raise quality standards. You'll handle hands-on engineering while setting the direction for how StackAdapt evaluates agentic workflows and the data pipelines that support them. This is leadership through expertise, not management overhead.
This role fits you if you have strong fundamentals in software testing, quality assurance, or data validation, plus genuine interest in how AI systems behave differently than traditional code. Computer science or engineering background helps, but what matters more is curiosity about testing non-deterministic systems and the ability to communicate clearly with cross-functional teams.
To apply, submit your resume and a short note about your quality or testing work through CareerJumpShip. StackAdapt is based in Teresina, Piauí, Brazil, and this is an on-site role.
About this role
StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision. With 465 billion automated optimizations per second, the AI-powered StackAdapt Marketing Platform seamlessly connects brand and performance marketing to drive measurable results across the entire customer journey. The most forward-thinking marketers choose StackAdapt to orchestrate high-impact campaigns across programmatic advertising and marketing channels. StackAdapt is seeking a talented Staff Quality Engineer to join the Automation and Intelligence Pillar pod, the group building StackAdapt's AI and agentic products. As the most senior quality engineer on the team, you will set the technical direction for how we test, evaluate, and ship intelligent systems, working across LLM-powered features, agentic workflows, and the data and tooling that support them. This is a hands-on, individual-contributor leadership role: you will lead the effort to design quality strategy for non-deterministic AI systems, build the frameworks and harnesses that make those systems testable, and raise the quality bar across a fast-moving, cross-functional agile environment. Your work will directly affect the success of product releases, accelerate our defect detection and prevention capabilities, and help define what quality means for AI at StackAdapt. Learn more about our engineering culture here: https://www.youtube.com/watch?v=LXM2NrkhKZc StackAdapt is a remote-first company; we are open to candidates located anywhere in Canada and the United States for this position. What You'll Be Doing: Own and drive the end-to-end quality strategy for the Automation and Intelligence Pillar pod's AI such as our Ivy product, from test architecture through release readiness Design and build evaluation frameworks for non-deterministic systems, including LLM output quality, agent behaviour, regression detection, and guardrail/safety testing Develop reliable, scalable automated test suites and tooling that address functional, system, API, integration, UI, and regression testing, and integrate them into our CI/CD pipeline Establish quality metrics and benchmarks (accuracy, latency, cost, hallucination/failure rates) that give the team confidence to ship and inform data-driven decisions Partner closely with Engineering Managers, Product Managers, Designers, ML/Data Science, and other engineering teams to align requirements, priorities, and definitions of done Act as a technical mentor and force multiplier across the QE org, promoting QE best practices, driving process improvements, and levelling up testing for AI systems company-wide Participate in technical planning, code review, and architectural decision-making, advocating for testability and reliability from the design stage Provide timely, actionable test result feedback to the Automation and Intelligence Pillar pod, the QA team, and other relevant stakeholders What You'll Bring to the Table: 7+ years of professional, hands-on software quality and test automation experience, with a track record of setting technical direction on complex systems Deep, hands-on experience with API & UI test automation frameworks such as Playwright, Cypress, Jest, or Junit Fluency in at least one of TypeScript, JavaScript, Python, or Java with preference for TypeScript Experience testing AI/agentic systems (evals, prompt/regression testing, output validation) and using AI to scale automation (test generation, self-healing tests, failure triage) with technologies such as OpenAI, Anthropic Experience with CI/CD tools like Jenkins, Github Actions, or CircleCI Strong understanding of scalable system design for web-based APIs and backend processing systems In-depth understanding of QA methodologies in a software company with fast release cycles Proven ability to define test case design standards and coverage strategy such as edge/negative, compatibility, performance and concurrency scenarios and to own a test case management practice (e.g. TestRail) that others build on Knowledge of React, including but not limited to adding data-testids Ability to explore a codebase and use technical tools to gain an understanding of technical implementation Experience coaching and influencing cross-functional teams on tooling, testing plans and strategies, and guiding them through execution StackAdapter's Enjoy: Highly competitive salary Retirement/ 401K/ Pension Savings globally Competitive Paid time off packages including birthday's off! Access to a comprehensive mental health care program Health benefits from day one of employment Work from home reimbursements Optional global WeWork membership for those who want a change from their home office and hubs in London and Toronto Robust training and onboarding program Coverage and support of personal development initiatives (conferences, courses, books etc) Access to StackAdapt programmatic courses and certifications to support continuous learning An awesome parental leave program A friendly, welcoming, and supportive culture Our social and team events! Please note: Benefits and perks may vary depending on your country of employment and the nature of your engagement. In locations where StackAdapt does not have a legal entity, employment and benefits are administered in accordance with local regulations and partner policies. StackAdapt is a diverse and inclusive team of collaborative, hardworking individuals trying to make a dent in the universe. No matter who you are, where you are from, who you love, follow in faith, disability (or superpower) status, ethnicity, or the gender you identify with (if you’re comfortable, let us know your pronouns), you are welcome at StackAdapt. If you have any requests or requirements to support you throughout any part of the interview process, please let our Talent team know. We use artificial intelligence (AI) to streamline the resume reviews of candidates and assess their fit based on the criteria outlined in the job posting. We do not use AI to make any final hiring or interview decisions. About StackAdapt We've been recognized for our diverse and supportive workplace, high performing campaigns, award-winning customer service, and innovation. We've been awarded: G2 Top Software for 2026 2026 Best Workplaces™ for Young Talent and in Canada by Great Place to Work® #1 DSP on G2 and leader in a number of categories including Cross-Channel Advertising To learn more about our privacy practices, please see our Privacy Policy. #LI-REMOTE
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