Senior Software Development Engineer in Test (Javascript)

Job Description

We are looking for a

highly skilled Senior Software Development Engineer in Test (SDET)

with

strong expertise in JavaScript

to join our Quality Engineering team. In this role, you will design and implement automated test frameworks, ensure code quality through robust test coverage, and collaborate with cross-functional teams to deliver high-performing, reliable software.

As a senior member of the team, you will drive test automation strategies, mentor junior engineers, and work closely with developers and product managers to embed testing best practices throughout the software development lifecycle. This role requires both strong coding ability and a passion for quality.

Key Responsibilities :

Design, develop, and

maintain automated test frameworks

and suites using

JavaScript .

Create, execute, and optimize

end-to-end, integration, API, and UI tests .

Collaborate with developers to ensure code is testable and covered by automated tests.

Identify, isolate, and report defects, ensuring issues are tracked through resolution.

Integrate automated tests into CI / CD pipelines to enable continuous testing.

Monitor and analyze test execution results, providing actionable feedback to engineering teams.

Contribute to overall

quality strategy , ensuring consistent standards across projects.

Mentor junior QA / SDET engineers on automation practices, code reviews, and test design.

Advocate for testability, performance, and scalability improvements in product design.

Collaborate with Product and Engineering teams in an

Agile environment , actively participating in sprint planning, reviews, and retrospectives.

Qualifications

5+ years of professional experience

in software testing or software engineering roles.

Strong coding proficiency in

JavaScript , with experience building and maintaining automated test frameworks.

Hands-on experience with

test automation tools

(e.g., WebdriverIO, Jest, Mocha, Jasmine, or similar).

Solid understanding of

CI / CD pipelines

and integration of automated tests into build processes.

Experience testing

APIs (REST / GraphQL)

and web applications at scale.

Strong debugging and troubleshooting skills across frontend, backend, and integration layers.

Familiarity with performance and accessibility testing tools is a plus.

Proven ability to work in

Agile / Scrum

environments.

Excellent communication and collaboration skills,

with experience partnering with developers and product managers.

Strong

problem-solving mindset,

with the ability to balance speed, quality, and technical excellence.

Additional Information

Location : Guadalajara,

Jalisco, Mexico (working from home - office won't be mandatory all the time, rather it will required from time to time).