Sergio Esparza
đź“Ť- Laredo,
Summary
Detail-oriented and proactive professional with 4 of experience in accessibility quality assurance, UI development, and software testing. Skilled in ensuring inclusive, user-friendly interfaces that meet WCAG standards, developing responsive front-end designs, and executing comprehensive testing strategies to deliver high-quality software. Adept at collaborating with cross-functional teams to enhance user experience and product reliability. Passionate about leveraging technical expertise to create accessible and seamless digital solutions.
Overview
6
6
years of professional experience
1
1
Certification
Work History
Accessibility Quality Assurance Specialist
Seven Color, Inc.
Toronto, Ontario
02.2021 - 03.2025
- Conducted accessibility audits to ensure compliance with WCAG 2.1/2.2 standards, identifying and resolving issues for screen readers, keyboard navigation, and assistive technologies.
- Collaborated with designers and developers to implement ARIA landmarks, roles, and attributes, improving usability for diverse audiences.
- Performed testing with tools like Axe, WAVE, and Lighthouse, reducing accessibility violations.
- Developed and maintained accessibility documentation, training team members on best practices for inclusive design.
UI Developer
Health Care LA
Los Angeles
07.2019 - 03.2020
- Developed responsive, user-friendly interfaces using React, JavaScript, and Tailwind CSS, ensuring cross-browser and device compatibility.
- Translated Figma/Sketch designs into high-fidelity UI components, maintaining design integrity and functionality.
- Optimized front-end performance, achieving reduction in load times through efficient code and asset management.
- Partnered with UX designers to refine user flows and improve overall user experience.
Education
High School Diploma -
Martin High School
05-2025
Skills
- Accessibility quality assurance
- WCAG compliance and ARIA implementation
- Screen reader testing
- Color contrast analysis
- Keyboard navigation testing
Certification
- Certified Professional in Accessibility Core Competencies (CPACC) – IAAP
- Web Accessibility Specialist (WAS) – IAAP
- ISTQB Certified Tester – Foundation Level
- DHS Section 508 Certified Trusted Tester
Timeline
Accessibility Quality Assurance Specialist
Seven Color, Inc.
02.2021 - 03.2025
UI Developer
Health Care LA
07.2019 - 03.2020
High School Diploma -
Martin High School
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