Jose Alejandro Rubio Estrada
QA Engineer
Bilingual QA Engineer with a strong engineering and data-driven analytical background, combining hands-on experience in manual test design, REST API testing, and automated test framework development. Proficient in designing comprehensive test scenarios using Equivalence Partitioning (EP), Boundary Value Analysis (BVA), and Decision Tables, validating APIs via Postman and Swagger, and building scalable API test automation pipelines with Playwright, TypeScript, and CI/CD integration. Adept at dissecting complex workflows, identifying requirement gaps, and ensuring high software quality and data integrity across end-to-end applications.
QA Projects
Test Design & Requirements Analysis
Binary Studio Academy- Designed test scenarios using Equivalence Partitioning, Boundary Value Analysis, Decision Tables, State Transition Testing, and Error Guessing.
- Analyzed user stories and identified undefined behaviors and requirements gaps requiring clarification before defining expected test results.
- Created structured test documentation and a state transition diagram to model application behavior and improve test coverage.
REST API Testing with Swagger & Postman
Binary Studio Academy- Designed and executed a 19-request end-to-end API workflow covering authentication, CRUD operations, borrowing, reviews, scoring, and cleanup.
- Tested REST endpoints using Swagger and recreated the full workflow as a reusable Postman collection with collection variables and dynamically generated test data.
- Implemented automated validations for HTTP status codes, response times, and response data, achieving 54/54 passing Postman tests.
- Identified and documented 16 API and documentation issues, including inconsistent responses, undocumented validation limits, missing error documentation, and a functional defect.
API Test Automation Framework
Binary Studio Academy- Built an API test automation framework using Playwright and TypeScript for the Book Exchange API.
- Automated happy-path, negative, and data-driven test scenarios using reusable controllers, helpers, and dynamic test data.
- Implemented strict JSON Schema validation with Ajv and assertions for API status codes and response structures.
- Used beforeAll, afterAll, and test.step() to organize execution and ensure cleanup even when tests fail.
- Configured a CI pipeline with Prettier validation, Playwright tests, JUnit/HTML reports, and scheduled daily test execution.
Experience
Oportun
October 2023 – Present- Provide high-quality financial customer support as a bilingual agent, effectively managing customer inquiries in both English and Spanish.
- Analyze complex financial accounts, ensure strict compliance with banking guidelines, and maintain internal quality standards.
- Leverage data-driven problem-solving to resolve financial discrepancies and improve first-contact resolution rates.
- Achievement: Consistently meet and exceed key performance metrics and QA standards within the financial service department.
Taquería El Circo
October 2018 – June 2019- Designed, drafted, and successfully implemented comprehensive operational manuals to standardize service processes across the business.
- Developed a custom, tailored CRM system from scratch to streamline order registration, optimize delivery tracking, and manage customer data.
- Technical stack: Python, JavaScript, PHP, and MySQL for database management; developed the waiter-facing UI using React; integrated Excel/VBA for operational tasks.
- Achievement: Transformed manual workflows into an efficient digital process, drastically reducing delivery times and enabling data-driven managerial decisions.
Colegio Moderno de Querétaro
August 2018 – June 2019- Taught Physics courses completely in English at the secondary education level, developing academic materials and specialized lesson plans.
- Acted as a tutor to guide students through scientific concepts, analytical problem-solving, and laboratory principles.
Education
Master's Degree in Food Chemical Engineering
Universidad Nacional Autónoma de México (UNAM)
Advanced academic program focused on chemical processes, statistical control, and rigorous laboratory methodologies. Developed strong research and analytical skills applicable to quality control and process engineering frameworks.
Bachelor's Degree in Environmental Technology Engineering
Universidad Politécnica del Estado de Morelos
Multidisciplinary program combining scientific and engineering principles applied to the remediation and prevention of environmental impact derived from human activities.
Languages
- Spanish: Native speaker.
- English: Full professional proficiency (Currently working as a bilingual agent in the financial sector).
Technical Skills
Software Testing: Functional Testing, API Testing, Negative Testing, Test Design, Requirements Analysis, Equivalence Partitioning, Boundary Value Analysis, Decision Tables, State Transition Testing, Error Guessing.
API & Test Automation: Postman, Swagger/OpenAPI, Playwright, TypeScript, JSON Schema Validation (Ajv), Data-Driven Testing.
Programming & Web Development: Python, JavaScript, TypeScript, PHP, React, HTML, Excel/VBA.
Databases & Analytics: MySQL, Power BI, Tableau, R.
Tools & Workflow: Git, GitHub, GitLab, Browser Developer Tools, CI/CD, JUnit Reports, HTML Test Reports.
Certificates
- Career Essentials in Generative AI | Microsoft and LinkedIn (2026)
- Google Data Analytics Professional Certificate | Google LLC (2025)
- Professional Fundamentals of Data Analysis | Microsoft and LinkedIn (2024)
- Python Esencial | LinkedIn (2024)
- PHP Course | Edutin Academy (2023)
Hobbies & Interests
International Football & Data Analysis: I enjoy following international football tournaments and leveraging my data analytics background to study match projections, team statistics, and predictive probabilities.
Continuous Learning: Fascinated by emerging technologies, automation tools, and exploring custom software architectures.