Senior QA Automation Engineer
Aplazo
Senior QA Automation Engineer
Aplazo
Provides BNPL payments for merchants
Level: E2 (Senior)
Location: Mexico City or Remote (LATAM)
We're looking for a Senior QA Automation Engineer to elevate engineering quality across Aplazo. This is an engineering role—you'll write production-grade code and maintain automated tests independently; improve existing suites and coverage in your own area, adapt and improve test plans for medium/large features, execute end-to-end with little guidance and give clear feedback to engineers on quality.
You're an engineer who's passionate about quality and believes the best way to achieve it is by empowering every engineer to test better.
At E2, you lead quality initiatives for your squad and mentor engineers on testing practices.
Mentor engineers on quality — Pair with engineers to improve their testing practices; TDD, and test design
Own test strategy — Define testing approaches for your squad
Write code — Build production-grade automation, testing tools & test scripts
Drive quality metrics — Instrument and track quality signals (coverage, flakiness, test times, defect rates); use data to prioritize improvements
Leverage AI for quality — Use AI to generate tests, identify coverage gaps, and accelerate quality feedback loops
Participate in on-call & incident response - Troubleshoot production issues using logs, metrics, and observability tools; investigate services and infrastructure, identify or narrow down root causes, perform appropriate operational actions, and escalate incidents to the right owning team with clear technical context.
Shift quality left — Help engineers catch issues earlier through better design, testability coaching, and fast feedback
Technical
3 - 5+ years as a QA Automation Engineer
Strong programming skills— able to write production-grade, maintainable code, not just test scripts. Proficiency in at least one modern programming language (e.g., Java, JavaScript/TypeScript, Python, Dart) and the ability to quickly adapt to others for QA tooling.
Hands-on test automation experience — experience designing, building, and maintaining automated tests across Web, API, and/or Mobile using tools such as Selenium, Cucumber, Appium, Rest Assured, Playwright, Maestro | Patrol, or equivalent technologies.
Deep expertise in test architecture: unit, integration, contract, and e2e testing strategies
Proficient with CI/CD, integration and test automation with Jenkins pipelines and GitHub Actions for solution builds and deployments.
Familiar with our stack or similar: Java/Spring, Angular/Flutter, AWS, PostgreSQL, MongoDB, Datadog, Postman, Bruno and JMeter
Familiar with on-call process like production trouble shooting (reading/matching logs & metrics, using observability tools like Datadog & taking with engineers appropriate mitigation actions and escalating incidents right away (accordingly to the severity)
AI Fluency
Uses AI tools to generate test cases, identify edge cases, and accelerate test development
Applies AI to detect flaky tests, analyze coverage gaps, and prioritize testing efforts
Builds or champions AI-powered quality tools for the team
Stays current on AI-assisted testing capabilities and best practices
Quality Philosophy
Believes engineers should own quality—your job is to enable them, not replace them
Thinks about testability during design, not just after implementation
Pragmatic about test coverage—you optimize for confidence
Understands testing and when to break the rules
Leadership & Communication
Experience in coaching engineers and changing team practices
Writes clear documentation and runbooks
Fluent in Spanish; working knowledge of English for cross-team collaboration
Mindset
Product first, quality specialist second
Passionate about developer experience—you build tools people love to use
Strong ownership; you drive quality improvements end-to-end
Curious about fintech-specific quality challenges (financial accuracy, compliance, fraud)
Experience in fintech, payments, or high-reliability systems
Background in mobile testing (Flutter, iOS, Android), web testing(HTML/Angular/JS, backend testing (Java,Spring boot, Golang)& testing frameworks like Maestro or Patrol.
Performance and load testing experience
Contract testing (Pact) or API testing expertise
Contributions to open-source testing tools or frameworks
Experience managing a mobile device farm (Sauce Labs)
Languages: Java, Python, Javascript
Frameworks: JUnit, TestNG, Playwright, Selenium, Appium, Maestro/Patrol
API Tooling: Postman/Bruno, Jmeter/LoadRunner, Rest Assured
CI/CD: Jenkins, GitHub Actions, CodeMagic
Infrastructure: AWS, Pulumi
Observability: DataDog
Our mission is to empower financial access and opportunity across Latin America through fair, simple, and transparent solutions. Our tech vision: be the most beloved and innovative tech organization in Latin America.
We're a Series B fintech growing fast—quality is critical when you're handling millions of financial transactions. You'll shape how 50+ engineers think about and practice quality.
Aplazo provides buy-now-pay-later (BNPL) services in Mexico for online and in-store shoppers who often don’t have credit cards. Merchants can offer installment payments at checkout, and Aplazo settles funds to the merchant while the shopper pays in fixed installments. The system uses risk models, including AI-assisted credit decisions, to manage delinquency as it grows across ecommerce and physical retail. The company differentiates itself by targeting Mexico’s largely underbanked market and enabling both online and in-person purchases, supported by data-driven risk tools and a funding-backed expansion. Aplazo aims to become the go-to payment option for everyday purchases in Mexico.
Explore more opportunities at Aplazo