---
title: 'Senior Software Development Engineer in Test at Aplazo'
canonical: 'https://feeny.ai/job/senior-software-development-engineer-in-test-aplazo-mexico-927mzxcm7krf'
type: 'job'
last_seen: '2026-09-05'
---

# Senior Software Development Engineer in Test at Aplazo

- **Company:** Aplazo
- **Location:** Mexico
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-08-19
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.ashbyhq.com/aplazo/0345dcb4-f2a1-4fe6-ac66-840ab9999f15

## Job description

## ABOUT THE ROLE

We're looking for a Senior SDET (Software Development Engineer in Testing) 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 not a QA gatekeeper. 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. You'll build the tools, frameworks, and practices that make quality a natural part of how we work.

You lead quality initiatives for your squad and mentor engineers on testing practices.

## WHAT YOU'LL DO

- Mentor engineers on quality — Pair with engineers to improve their testing practices; TDD, and test design
- Own test strategy — Define testing approaches (unit, integration, contract, e2e) 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
- Shift quality left — Help engineers catch issues earlier through better design, testability coaching, and fast feedback

## WHAT WE'RE LOOKING FOR

Technical

- 3 - 5+ years as a software engineer or SDET
- Strong programming skills—you will write production code, not just test scripts (Java, selenium, cucumber, Appium (for mobile test), RestAssured (for API testing))
- 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

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

- Engineer 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)

## NICE TO HAVE

- Experience in fintech, payments, or high-reliability systems
- Background in mobile testing (Flutter, iOS, Android) & 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)

## OUR STACK

Languages: Java, Python 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

## WHY APLAZO

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.

## About Aplazo

## Company Overview
- **One-liner**: Aplazo is a Mexican fintech that provides a buy now, pay later (BNPL) platform enabling consumers to purchase goods in installments without needing a credit card, serving both online and physical merchants.
- **Entity Type**: Private (Series B, $45 million raised in May 2024)
- **Headquarters**: Mexico City, Cuauhtémoc, Mexico City, Mexico
- **Founded**: 2020
- **Founders**: Angel Peña (Co-Founder & CEO) and others (COO also co-founder, but name not disclosed in sources)

## Core Business
- **Primary industry/industries**: Financial technology (BNPL / consumer payments)
- **Target customers**: B2C (underbanked and credit-invisible consumers in Mexico) and B2B (offline and online merchants seeking to increase sales and loyalty)
- **Mission or purpose statement**: To become the preferred payment method in Mexico by making credit more transparent, flexible, and accessible, especially for the large unbanked population.

## Products & Services
- **Aplazo BNPL**: A virtual card that allows shoppers to pay in installments (typically 20% upfront, remainder in fixed payments) without a credit card. Available in-store (more than half of transactions) and online.
- **Merchant Tools**: Integration services and data analytics that help businesses offer installment payments, drive conversion, and build customer loyalty.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total equity funding of ~$100 million, with an additional $75 million in committed debt. Revenue reportedly tripled in the past year (as of May 2024), and the company claimed to be near cash-flow breakeven.
- **Notable Investors/Partners**: QED Investors (led Series B), Oak HC/FT, Kaszek, Picus Capital, and Volpe Capital (new investor). Partnerships with nearly 10,000 merchants.
- **Growth Signals**: Revenue tripled year-over-year; delinquency rates cut by half while business more than 3x’d; 40% of users have no credit history, giving Aplazo a unique data advantage; strong presence in physical retail (in-store >50% of transactions).

## Competitive Advantages
- **AI-powered underwriting**: The company uses AI to assess risk per transaction, enabling low delinquency even with limited traditional credit data.
- **Massive underserved market**: Mexico has a large underbanked population (~40% of users have no credit history), making it difficult for international players like Klarna or Affirm to compete.
- **Dual channel (online + offline)**: In-store BNPL is a key differentiator in a market where e-commerce penetration is still low.
- **Data moat**: With ~10,000 merchant relationships and millions of transactions, Aplazo’s data network continues to compound, improving both underwriting and merchant value.

## Strategic Focus
- **Deepen product ecosystem**: Use BNPL as a stepping stone to broader financial services (e.g., credit building, savings, or lending) for both consumers and merchants.
- **Expand merchant network**: Continue onboarding physical and digital retailers, leveraging in-store adoption.
- **Self-funded growth**: With near breakeven status and strong unit economics, the company aims to grow without heavy reliance on future dilution.

## Why Work Here
- **Hybrid work model**: Employees work in a combination of remote and on-site (office in Mexico City). Some roles are fully remote; others require occasional in-office time.
- **Culture of efficiency and AI**: The company emphasizes lean, data-driven operations. Engineering and data science teams are central, with AI embedded across the organization.
- **Growth trajectory**: Revenue tripling and disciplined scaling make it an attractive place for those wanting impact in an emerging market fintech.
- **Notable perks**: Not explicitly listed, but a “high-growth startup” environment with a focus on financial inclusion and real-world impact. Headcount is around 190 (BuiltIn) or 130 (TechCrunch 2024); engineering team of ~65 is a significant portion of the company.

## Sources
1. [aplazo.mx](https://aplazo.mx/)
2. [Built In - Aplazo careers](https://builtin.com/company/aplazo)
3. [TechCrunch - Series B announcement](https://techcrunch.com/2024/05/13/aplazo/)
4. [The Org - Aplazo team structure](https://theorg.com/org/aplazo)

## Other roles at Aplazo

- [Technical Lead Manager](https://feeny.ai/job/technical-lead-manager-aplazo-remote-decyhebaj6t6)
- [FP&A Manager](https://feeny.ai/job/fp-a-manager-aplazo-mexico-city-qzn8evavv4r0) — Mexico City, Mexico
- [Lead Backend Engineer](https://feeny.ai/job/lead-backend-engineer-aplazo-mexico-vf0xftcwe0v2) — Mexico
- [DevOps Tech Lead Manager](https://feeny.ai/job/devops-tech-lead-manager-aplazo-mexico-csrsy925xnwb) — Mexico
- [Creative & Brand Guardian](https://feeny.ai/job/creative-brand-guardian-aplazo-mexico-city-qye7gwfjepj6) — Mexico City, Mexico
- [Marketing Specialist](https://feeny.ai/job/marketing-specialist-aplazo-mexico-city-jv6ee9xyny5h) — Mexico City, Mexico
- [Inside Sales Representative](https://feeny.ai/job/inside-sales-representative-aplazo-mexico-city-hst2a5paxr9y) — Mexico City, Mexico
- [Territory Supervisor - Mexico City](https://feeny.ai/job/territory-supervisor-mexico-city-aplazo-mexico-city-xh4jmcdj8qpy) — Mexico City, Mexico
- [Accounting & Tax Manager](https://feeny.ai/job/accounting-tax-manager-aplazo-mexico-city-3hm4k4hy1h24) — Mexico City, Mexico
- [Product Manager, BNPL Online](https://feeny.ai/job/product-manager-bnpl-online-aplazo-mexico-city-76ax2ys4x5xt) — Mexico City, Mexico