Skip to main content
Back to jobs

Senior QA Automation Engineer (Python - Selenium - Pytest)

External
3Pillar logo3pillar · Costa Rica
Full-timeRemoteToday
CI/CDMove
Cover LetterConnect

Prepare for this interview

Elite

AI-generated questions, company research, and talking points tailored to this role


Requirements

  • 5+ years of hands-on software QA with a track record of:
  • Test strategy, planning, execution, and maintenance
  • Comprehensive test documentation and traceability
  • Advanced test automation (custom frameworks, advanced scripting)
  • 3+ years with automated testing tools - Selenium, Pytest, or equivalent; ability to write custom testing frameworks
  • Advanced proficiency in a programming language relevant to test automation:
  • Python (primary for this engagement; Pytest, async testing)
  • Or Java, C#, Go
  • Deep knowledge of databases and SQL - execute complex data validation, verify multi-tenant isolation at the DB layer, test RLS policies
  • CI/CD pipeline expertise - understand how tests integrate into automated deployment workflows; experience optimizing test execution for speed and reliability
  • Understanding of Agile/Scrum methodologies - ability to drive QA strategies in rapid, iterative development cycles
  • Proficiency in defect tracking (Jira or equivalent)
  • Proven leadership - mentor junior engineers, advocate for quality standards, drive process improvements
  • Exceptional communication skills - articulate complex technical issues to engineers, product, and stakeholders
  • Self-motivated and detail-oriented - work independently under time pressure, manage multiple priorities

Additional Information

3Pillar is an AI transformation partner on a mission to help enterprises build the AI-native products and intelligent agents that will define the next era of business. With teams across North America, Europe, Latin America, and Asia, we work with the most ambitious companies in financial services, healthcare, media, and technology - helping them move faster, modernize boldly, and compete on their own terms. Our HelixAI platform and Helix Pods delivery model put our engineers at the center of real agentic transformation - doing work that is open, portable, and built to last. We are building the future of enterprise AI. Senior QA Automation Engineer You'll own test architecture and semantic validation for a mission-critical AI-powered system where consistency guarantees are non-negotiable. This isn't traditional QA; you're designing test harnesses that prove AI outputs are correct, not just crash-free. Your core responsibility: build a golden-set validation harness that measures whether the system's LLM stage produces the right decisions at the right confidence levels. You'll design automated tests across unit, integration, E2E, and access-control layers. You'll also establish CI/CD quality gates that block bad builds-schema validation failures, cross-tenant isolation defects, missing floor controls, semantic inconsistencies-before they reach production. This is front-loaded work (weeks 1-5), then you support the team through delivery. You'll mentor a junior test engineer and set the standard for test coverage in a compressed timeline.


Your Match

How well this role fits your profile.

Company Intel

What employees say

Worked at 3Pillar? Share your experience

Interested in this role?

Apply on the company's website.

Cover LetterConnect