Senior SDET - Test Automation & Performance Engineering | Contract | Remote MX

About us: Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients.

Our founders and team members have industry experience and have 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.

The Role: We are looking for a Senior SDET / Test Automation Engineer for a project based assignment to build the automated testing and release systems that ensure our products remain reliable as traffic, data volume, integrations, partners, and release velocity increase.

This is a hands-on engineering role focused on test automation, API and integration testing, performance and scalability testing, and CI/CD quality gates within an AWS-based environment. This is not a manual QA position.

You will design and build reusable test infrastructure, automate critical product and partner workflows, create realistic performance scenarios, and provide engineering teams with clear evidence of whether a release is ready for production.

You will work closely with engineering teams and the Performance & Reliability Engineering Lead to ensure quality and scalability are built into the development lifecycle rather than treated as a final release checkpoint.

Key Responsibilities

Design and evolve the automated testing architecture across products and engineering teams Build and maintain automated API, integration, contract, end-to-end, regression, and UI tests where appropriate Develop reusable test frameworks, fixtures, synthetic data, mocks, and environment strategies Build automated testing for distributed services and integrations running within AWS environments Design and execute load, str