Sr. QA Engineer

    Brazil
    Contract
    Senior (7+ yrs)
    Engineering & Development
    Posted on September 22, 2026

    Senior QA Engineer

    The Role

    We're hiring a Senior QA Engineer to own testing across our Software Development Life Cycle (SDLC). This is a strategy-and-automation role, not a click-testing one: you'll own the test strategy, write the test cases, and automate them on top of established open-source testing tools — working shoulder-to-shoulder with developers to bake quality in from the start rather than catch it at the end.

    This role partners closely with product and platform engineering.

    What You'll Do

    • Own the test strategy end-to-end across the SDLC.

    • Build and own test coverage on top of established open-source testing tools — defining the strategy, writing the test cases, and automating them — and integrate it into our Continuous Integration / Continuous Delivery (CI/CD) pipelines so tests run on every meaningful change.

    • Write clear, maintainable test cases and test plans, and keep them current as the product evolves.

    • Plan and run the full range of testing — including but not limited to integration testing, system testing, regression testing, and stress / load / performance testing.

    • Partner with developers to define acceptance criteria, shift testing left, and make quality a shared responsibility rather than a gate at the end.

    • Triage failures, drive root-cause analysis on escaped defects, and close the loop with durable fixes.

    • Report quality signals (coverage, flake rate, escaped defects) in a way the team can act on.

    What You'll Need (Required)

    • Strong test automation skills, with a track record of designing test strategy and automating it on top of established open-source testing tools.

    • Deep, practical understanding of the SDLC and where testing fits at each stage.

    • Proven experience writing test cases and test plans.

    • Hands-on experience across multiple testing types: integration, system, regression, and stress / performance.

    • Experience integrating automated tests into CI/CD pipelines.

    • Strong communication skills — you work directly with developers and can make a clear, persuasive case for quality.

    • Sufficient experience with Python, JS/TS

    Nice to Have

    • Strong experience with Python, JS/TS

    • Familiarity with open-source testing tools (for example, Playwright or Cypress for end-to-end, pytest for unit and integration, k6 or Locust for load and stress testing).

    • Exposure to testing cloud or containerized (Kubernetes) workloads.

    • Experience supporting a System and Organization Controls 2 (SOC 2) or similar compliance program by producing test evidence.

    • Background in enterprise or regulated environments where reliability is non-negotiable.

    • Experience in early-stage environments where one person owns a broad testing surface.

    What Success Looks Like (First 90 Days)

    • You've assessed current test coverage and identified the highest-leverage gaps.

    • Automated test coverage is running in the pipeline on every meaningful change.

    • The team has a clear, lightweight process for triaging failures and preventing repeat defects.

    Location and Work Model

    Remote in South America/Mexico/India/LATAM

    Company:  Tessera Labs

    AI platform for governed enterprise transformation across ERP, CRM, HCM, and finance systems.
    51-200 employees
    AI & Machine Learning
    HQ: United States