Senior Software Engineer in Test

Nscale is the GPU cloud engineered for AI. We provide cost-effective, high-performance infrastructure for AI start-ups and large enterprise customers. Nscale enables AI-focused companies to achieve superior results by reducing the complexity of AI development. Our GPU cloud bolsters technical capabilities and directly supports strategic business outcomes, including cost management, rapid innovation, and environmental responsibility.

At Nscale, our SDETs play a critical role in building new testing frameworks for cutting edge AI and cloud technologies.

We thrive on a culture of relentless innovation, ownership, and accountability, where every team member takes pride in their work and drives it with excellence and urgency. As an Nscaler, you’ll build trust through openness and transparency, where everyone is inspired to do their best work. If you join our team, you’ll be contributing to building the technology that powers the future.

Nscale is seeking a Senior Software Development Engineer in Test (SDET) to help scale quality across our GenAI cloud platform through engineering, automation, and enablement, not manual testing or release gatekeeping, joining our existing compact team of engineers.

You will act as a true quality multiplier across product squads – designing and maintaining test frameworks, CI quality pipelines, and internal tooling that allows teams to ship safe, observable and reliable features at high velocity. Developers own the quality of the features they build, and you will enable that ownership to scale.

• Enable product teams to ship high-quality software by building testing systems, frameworks, and guardrails.
• Define and evolve quality standards and best practices and quality gates that support safe and fast deployments.
• Define strategies and test scoping for large, complex or high-risk initiatives, partnering early with engineers and product managers to assess risk, define coverage and challenge assumptions.
• Continuously refine testing approaches, tooling, and processes to improve speed, reliability, and confidence at scale across Nscale.
• Coach and mentor engineers and Junior SDETs on test design, automation patterns, contract testing, and quality-first development practices.
• Ensure automated tests provide high-signal feedback and integrate cleanly with CI/CD workflows, Slack notifications, and dashboards.
• Design, build, and maintain automation frameworks and test infrastructure across multiple layers, including API, contract, integration, E2E, performance, security, and resilience testing.
• Constantly push boundaries on learning and implementing the latest testing methodologies, tools and infrastructure to support initiatives where appropriate.
• Proactively monitor and surface test debt, quality gaps, and systemic risks, proposing and implementing pragmatic improvements.

• A manual QA or regression testing role
• A release gate or sign-off function
• Sole ownership of feature testing while developers “throw work over the wall”

• Deep experience as a Software Development Engineer in Test or in a similar QA automation role.
• Proven ability to design, build, and evolve test frameworks and infrastructure, rather than only authoring individual test cases.
• Strong software engineering skills in one or more languages such as Go, Python, Java, or Type Script, used to build automation, tooling, and test infrastructure.
• Experience testing distributed, cloud-native systems, including APIs, event-driven architectures, and stateful workflows.
• Experience testing machine learning applications, inference services or AI-related software.
• Strong knowledge of testing methodologies, tools, and processes, including automated testing of distributed systems and APIs.
• Deep understanding of risk-based testing, test pyramid principles, and continuous quality practices in high-velocity environments.
• Comfortable operating in a developer-led quality model, where engineers own feature quality and SDETs enable scale.
• Experience with CI/CD tools and platforms (e.g., Git Lab CI/CD, Jenkins, Git Hub Actions).
• Experience using AI-enabled…