Senior Software Development Engineer in Test
As a Senior Software Development Engineer in Test (SDET), you will build the systems, infrastructure, and tooling that enable a high-scale technology platform to test applications under conditions that closely replicate the real world.
This is an engineering role, not a traditional manual QA position. You will write production-quality code and build testing platforms capable of validating performance, reliability, and scalability across applications serving millions of users globally. A key challenge will be creating environments and systems that can simulate traffic and workloads that are difficult to reproduce through conventional testing environments.
You will work closely with platform engineers and the broader engineering organization to give the team confidence that new code and infrastructure will perform reliably when deployed at scale. This role is ideal for an engineer who enjoys solving complex infrastructure, performance, and reliability problems and is comfortable independently designing solutions from the ground up.
ResponsibilitiesDesign and build scalable testing systems, platforms, and infrastructure that replicate real-world production conditionsDevelop software and tooling to test application performance, reliability, scalability, and infrastructure behavior at high traffic volumesBuild and maintain load, performance, stress, and synthetic testing capabilities for applications serving millions of users globallyCreate testing environments and processes that provide confidence that new code and infrastructure will scale successfully in productionWrite high-quality code using TypeScript, Python, or similar languages to build testing tools, automation, and supporting systemsDesign tests that identify performance bottlenecks related to latency, bandwidth, application speed, infrastructure capacity, and resource utilizationIntegrate automated testing and quality validation into CI/CD pipelines and engineering workflowsWork with cloud-hosted applications and infrastructure across platforms such as AWS, Cloudflare, Google Cloud, or similar providersUse Infrastructure as Code tools such as Terraform, Pulumi, or equivalent technologies to support repeatable and scalable testing environmentsPartner closely with platform engineers to understand system architecture, production behavior, and infrastructure constraintsAnalyze test results and production-like workloads to identify scalability risks before changes reach real-world trafficHelp establish the technical standards, systems, and processes for a new engineering-focused testing function
RequirementsStrong professional software engineering experience with the ability to independently design, build, and maintain software systemsStrong coding skills in TypeScript, Python, or comparable modern programming languagesExperience building automated testing systems, engineering tooling, testing infrastructure, or similar software-driven quality solutionsHands-on experience with load testing, performance testing, stress testing, synthetic testing, or large-scale application validationExperience working with applications or platforms serving millions of users or visitors, ideally at multi-million or tens-of-millions scaleExperience working with cloud-hosted applications and infrastructure using AWS, Google Cloud, Cloudflare, or comparable platformsStrong understanding of DevOps, platform engineering, infrastructure, scalability, and modern software deployment practicesExperience with CI/CD and integrating automated validation into continuous integration and deployment workflowsExperience with Infrastructure as Code using Terraform, Pulumi, or similar technologiesStrong understanding of application performance concepts including latency, bandwidth, throughput, scalability, reliability, and infrastructure optimizationAbility to independently investigate complex technical problems and build solutions with limited oversightStrong written and spoken English with the ability to communicate technical decisions and collaborate effectively with a distributed engineering team
PreferredExperience supporting globally distributed applications serving tens of millions of monthly visitorsExperience with high-traffic e-commerce platforms or other large-scale consumer-facing applicationsExperience working with custom or internally built platforms rather than primarily testing third-party or off-the-shelf softwareExperience optimizing applications or infrastructure where speed, latency, bandwidth, and infrastructure cost are critical considerationsExperience building testing infrastructure or frameworks from the ground up rather than primarily working within established QA systemsBackground in DevOps, Site Reliability Engineering, Platform Engineering, performance engineering, or infrastructure engineeringExperience working in fast-moving startup or lean engineering environments where engineers have significant ownership and autonomy
BenefitsSalary: $6,000 USD per month PTO: 15 days Holidays: Local or US holidays