Jonas
Davila.Senior QA Engineer · Quality Engineer

  • Porto Alegre, Brazil
  • Remote or hybrid
  • Intermediate English
Jonas Davila, wearing round glasses and a houndstooth blazer, hand on chin
Quality EngineeringOpen to new opportunities

Quality engineering that makes products more reliable.

17+ years in tech, 10 of them in software quality. I bring together risk-based strategy, automation, APIs, performance, security, CI/CD and AI quality so teams can ship with confidence.

Chat on WhatsApp (opens in a new tab)Download CV (PDF)

Currently completing a graduate specialization in Software Quality Engineering and Testing at PUC Minas, with ongoing study of AI in quality.

17+years in technology
10years in software quality
−90%production bugs at KingHost

Each criterion in the quality gate links to the evidence behind it.

quality-gate · profilerun 2026.10
6 of 6 criteria backed by evidenceGO

Experience and impact

In-house roles focused on outcomes and risk reduction, most recent first.

07/2025 — 07/2026

SPASSU

Senior QA Engineer · Senior Quality Automation Engineer · Caixa Econômica Federal project

  • Built test coverage across six areas (functional, integration, regression, security, performance and load) for digital financial products, applying OWASP practices.
  • Used generative AI and prompt engineering for scenario analysis, issue investigation and test case generation, checking context, consistency and hallucinations before relying on any output.
  • Consolidated technical evidence and quality recommendations for Product and Technology, using automation, simulators, mocks and stubs in the test strategy.

scope: 6 test areas · OWASP · GenAI

10/2024 — 05/2025

QualityMap

Senior Software Quality Engineer · Team Leader · Prompt Engineer for Testing

  • Shaped quality strategies around business goals and defined metrics to drive continuous improvement of QA processes.
  • Ran generative AI experiments for Quality Engineering at QualityLAB, evaluating model outputs, limitations and inconsistencies in scenario generation, risk analysis and automation support.
  • Led risk assessments, process audits and corrective actions, brokering quality decisions between clients, engineering teams and the business.

role: Team Leader · QualityLAB

04/2024 — 08/2024

HostGator

Senior Software Quality Engineer · Automation

  • Strengthened the automation and API testing strategy, adding contract, performance and security tests for REST APIs.
  • Set up test plans, documentation and quality metrics for each sprint, and supported code reviews to improve maintainability.

impact: −20% production bugs

05/2021 — 08/2023

Itaú Unibanco

Senior Quality Analyst · QA Automation

  • Automated scenarios and journeys for financial and payment products with Selenium, JUnit, Cucumber/BDD, Percy and Appium, on web and mobile.
  • Ran performance tests with JMeter, tracked quality metrics in Tableau and worked with Engineering and Product from refinement to release.

scope: web + mobile · performance

04/2020 — 05/2021

Thoughtworks

Quality Analyst Consultant · QA Automation

  • Quality Engineering consulting for international clients, with risk-based strategy, exploratory testing and automation using Postman, Insomnia, Jest and JavaScript.
  • Facilitated quality discussions and led improvements in chapters and communities of practice.

clients: Lenovo · PwC North America

09/2019 — 04/2020

KingHost

Quality Analyst · QA Automation

  • Built the company's first QA practice, with automation and validation of APIs and integrations.
  • Cut a technical process from about three days to roughly one minute through automation, version control and continuous integration.

impact: −90% production bugs

04/2019 — 09/2019

TAG Livros

Full Stack Developer · QA Automation

  • Built web features with React, Node.js and PostgreSQL, tested with Cypress: the engineering foundation behind my Quality Engineering work today.

11/2016 — 01/2019

DBServer

Quality Analyst · QA Automation · Banrisul and PROCERGS projects

  • Worked on financial-sector projects for Banrisul and public-sector projects for PROCERGS, Rio Grande do Sul's state IT company.
  • Planned and ran functional, API and integration tests, plus performance tests with JMeter and SoapUI.
  • Investigated, documented and reported defects together with the development teams.

start in QA · APIs · performance

06/2009 — 11/2016

Start in technology

IT Support · Performática (Compulab) and TOTVS (Personal Med)

  • Seven years of specialist support for healthcare software used by labs and clinics: troubleshooting, user training and business analysis.

Quality isn't produced by testing. It's built through decisions.

My career combines engineering, automation and technical leadership to expand the role of quality in organizations. I've built QA practices from scratch, worked on financial products and large-scale platforms, and always turned technical signals into decisions that make sense for the business.

I start from product risk to choose the right strategy and test layer: unit, integration, API, E2E, exploratory or non-functional. In AI systems I also assess consistency, context, reliability and unexpected behavior.

How I think about Quality Engineering

Before execution, a way of thinking that runs through every project below.

  1. Risk
  2. Evidence
  3. Decision
  4. Confidence

Risk before volume

Coverage isn't just a test count. The goal is better information about the risks that matter.

Automation is an engineering decision

I automate when feedback, repeatability, criticality and maintenance cost justify the investment. I don't advocate automating everything.

Quality Gates need evidence

A green pipeline alone doesn't make a product reliable. Gates should reflect risk, evidence, context and quality criteria.

Quality goes beyond testing

It includes architecture, observability, security, performance, accessibility, processes and user experience.

AI needs technical controls

Prompts don't replace permissions, isolation, validation, quality gates, observability and human sign-off where it's needed.

From strategy to technical execution

Highlighted tools are the ones I've used most in real projects.

Quality strategy

  • Risk-Based Testing
  • Test Strategy
  • Quality Engineering
  • Coverage and metrics
  • Continuous improvement

AI Quality and GenAI Testing

  • Prompt Engineering
  • LLM evaluation
  • Hallucinations and risk
  • Generative AI in QA
  • Scenario generation

Automation

  • Playwright
  • Cypress
  • Selenium
  • Appium
  • Jest
  • JUnit
  • Cucumber / BDD
  • Percy

APIs and non-functional testing

  • REST
  • k6
  • JMeter
  • Postman
  • Contract · OpenAPI
  • OWASP
  • Insomnia
  • SoapUI

Engineering and delivery

  • TypeScript
  • Java
  • GitHub Actions
  • JavaScript
  • Python
  • Go
  • Jenkins
  • Git
  • PostgreSQL

Leadership and collaboration

  • Mentoring
  • Team Leader
  • Facilitation
  • Stakeholders
  • Chapters and communities
  • Scrum

Applied quality strategy, not just automation

Two public labs written up as case studies: problem, risk, strategy and engineering decisions.

Other technical labs

More public Quality Engineering labs, each with code and CI on GitHub.

AIMA 2.0

A personal project, now in Preview Edition. In it I explore how Quality Engineering, metrics, artificial intelligence and strategic thinking connect to turn evidence and risk into better decisions.

It brings together 20 frameworks and 28 concepts developed through research, writing and experimentation, with open-source code on GitHub. It builds on the article I published on the Thoughtworks blog in 2020.

Explore AIMA 2.0 (opens in a new tab)View code on GitHub: aima-agentic-qe (opens in a new tab)
  1. 01Context
  2. 02Evidence
  3. 03Risks
  4. 04Decision
  5. 05Action

Writing on Quality Engineering

AIMA: How to increase the performance of QA Analysts through indicators

Article · Thoughtworks blog · Dec 2020

Original article with the first version of the thinking behind AIMA.

Read the article (opens in a new tab)

What people say about working with me

“Jonas has a very distinctive way of looking at software quality. His work delivers consistently, but also makes room for other layers: creativity and experimentation.”

Ellen AquinoDirect manager

“Together with Jonas we designed and structured the automation project using Cypress. I learned a lot from him about standardization and good practices.”

Eros Luiz Garzuzi da CostaQA Engineer · colleague at HostGator

“Jonas is an exceptional mentor in software testing. His ability to share knowledge clearly and effectively is truly admirable.”

Thaís AmbrósioQA Engineer · mentee

Translated from Portuguese.

Read all on LinkedIn (opens in a new tab)

Education and continuous learning

PUC MinasPostgraduate degree in Software Quality Engineering and Testingin progress · expected 2027
ISTQB CTFLCertified Tester Foundation Level
UnisinosInformation Technology Management · 2015–2020
QI Technical SchoolIT Technician program · 2009–2013
Web Accessibility for DevelopersWeb accessibility for development teams
Ethics in Generative AIResponsible use of artificial intelligence

Need senior expertise in Software Quality?

I'm open to roles in teams that value strategy, automation, collaboration and business-driven quality.

  • Senior QA Engineer
  • Quality Engineer
  • QA Automation Engineer
  • Senior QA Analyst
Email

jonas.qa.software@gmail.com

Send email
WhatsApp

+55 51 99263-2426

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LinkedIn

/in/jonasdavila

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GitHub

/jonasqasoftware

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Jonas Davila leaning against a stone wall, holding his blazer lapel