Senior SDET - Test Automation & Performance Engineering | Contract | Remote MX
Tech Holding3 hours ago
Responsibilities
- Design and evolve automated testing architecture across products and engineering teams.
- Build and maintain automated API, integration, contract, end-to-end, regression, and appropriate UI tests.
- Develop reusable test frameworks, fixtures, synthetic data, mocks, and test environment strategies.
- Create automated tests for distributed services and integrations running in AWS environments.
- Design and execute load, stress, spike, soak, scalability, degradation, and recovery tests.
- Model realistic workloads, concurrency, traffic patterns, data volumes, and dependency behavior in repeatable performance test suites.
- Integrate automated tests into CI/CD pipelines and establish enforceable quality and release gates.
- Improve test observability, failure reporting, test-data reliability, and environment strategies.
- Debug failures across APIs, services, databases, infrastructure, and external integrations.
- Partner with Performance & Reliability Engineering and Security Engineering on scalability, production-readiness, permissions, isolation, negative-path, and abuse-related scenarios.
- Identify and reduce flaky tests, escaped defects, manual release effort, and regression risk.
- Coach engineers on testability, automation, quality ownership, and defect prevention.
Requirements
- Strong experience as an SDET, Software Engineer in Test, Test Automation Engineer, Quality Engineer, or similar engineering-focused testing professional.
- Strong software development and test automation skills.
- Experience testing APIs, distributed services, integrations, and cloud-based applications.
- Hands-on experience working within AWS environments.
- Strong experience building automated API and integration test frameworks.
- Hands-on performance and scalability testing experience with tools such as k6, Gatling, Locust, JMeter, or equivalent.
- Experience designing realistic performance workloads and conducting load, stress, spike, soak, and scalability testing.
- Experience integrating automated tests into CI/CD pipelines and establishing automated quality gates and release criteria.
- Experience with contract testing across service boundaries.
- Strong understanding of test-data management, synthetic data, fixtures, mocks, and environment reliability.
- Experience using logs, metrics, traces, and observability tools to diagnose test and system failures.
- Strong debugging skills across applications, APIs, infrastructure, databases, and integrations.
- Experience identifying and reducing flaky or unreliable automated tests.
- Ability to influence engineering teams and promote shared ownership of quality.
- Preferred experience with high-scale SaaS or distributed platforms, resilience and recovery testing, infrastructure-as-code, ephemeral test environments, security-adjacent testing, identity, DNS, registries, security domains, or quality platforms used across multiple engineering teams.
Benefits
- Contract employment.
- Remote work in Mexico.
About Tech Holding
Tech Holding is a full-service consulting firm that was founded on the premise of delivering predictable outcomes for our clients. Our founders and team members have industry experience and held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability.