We are looking for a Senior Software Engineer inTest (SDET) to help build and assure the next generation of intelligent,agentic products and platforms. This is a hands-on senior engineering role for someonewho combines deep automation expertise with strong software engineeringfundamentals and practical experience testing AI-powered and agent-basedsystems in production-grade environments.
This role is idóneo for a builder who enjoys solving complex quality challenges,designing scalable automation strategies, and raising the engineering baracross teams. We are particularly interested in candidates who can applyinnovative thinking, strong ownership, and modern quality engineering practicesto validate agentic applications, LLM-powered workflows, APIs, user journeys,and end-to-end platform reliability.
We are seeking a talented Senior SoftwareDevelopment Engineer in Test (SDET) to define and implement an effectiveautomation and quality strategy within an Agile team. This role will validateapplication functionality, resilience, and business outcomes using moderntesting methodologies, strong engineering discipline, and best practices incontinuous integration and delivery

Requirements
Role:

Own end-to-end quality engineering for agenticapplications, intelligent workflows, APIs, user interfaces, and supportingplatform services.

Design, develop, and maintain robustautomation frameworks for UI, API, integration, regression, and system-leveltesting.

Define test strategies for AI and agent-basedsystems, including workflow validation, response quality, tool usage,guardrails, reliability, and failure handling.

Build automated quality gates for CI/CDpipelines and ensure high-confidence releases through continuous testing.

Partner closely with software engineers,product managers, architects, and data/AI teams to ensure quality is built infrom design through production.

Create meaningful test data, validate edgecases, identify defects early, and drive root cause analysis through toresolution.

Evaluate non-functional characteristics suchas performance, reliability, observability, resilience, and scalability.

Contribute innovative ideas that improvetestability, developer productivity, release confidence,



and engineeringeffectiveness.

Demonstrate strong ownership by proactivelyidentifying gaps, driving improvements, and mentoring team members onautomation and quality best practices.

About You

Strong experience in software test automation,automation framework design, and code quality practices.

Proven ability to test modern distributedsystems, APIs, event-driven architectures, and user-facing applications.

Experience validating AI-enabled or agenticapplications, including prompt/workflow validation, output quality assessment,and scenario-based testing.

Strong understanding of Agile development,shift-left testing, continuous integration, and continuous delivery.

Comfortable working across ambiguity andapplying innovative thinking to solve new and evolving quality challenges.

Strong communication, collaboration, andstakeholder management skills, with a bias for action and accountability.

Technical Skills

Strong programming skills in Java, Python, orsimilar languages used for automation and test engineering.

Hands-on experience with API and UI automationframeworks such as Playwright, Selenium, Cypress, REST Assured, or equivalent.

Experience integrating automated tests intoCI/CD pipelines and quality gates.

Understanding of test approaches for LLMs,retrieval workflows, agent orchestration, and non-deterministic systems ishighly desirable.

Familiarity with observability, logging, testdata management, performance testing, and service virtualization is a plus.

Leadership & Mindset

Innovative thinker who challenges conventionalapproaches and introduces better ways to assure quality at scale.

Strong sense of ownership, accountability, andfollow-through from test strategy through delivery outcomes.





Able to influence quality culture across teamsand mentor others in modern automation and engineering excellence.

Must-Have

Strong automation engineering backgroundwith hands-on framework design and coding

Experience with LLM evaluation,prompt/workflow validation, and agent guardrail testing

Hands-on expertise in Playwright for UI and end-to-end automation

Exposure to performance, resiliency, andobservability testing for AI systems

Proven experience testing APIs,integration flows, and CI/CD quality gates

Knowledge of retrieval-based systems,tool-calling workflows, and non-deterministic test patterns

Experience testing agentic AIapplications , including workflow accuracy, tool usage, and failurehandling

Experience with service virtualization,test data management, and synthetic test environments

Strong programming skills in Java,Python, or similar languages for automation

Familiarity with cloud-native testing indistributed/event-driven systems

Ownership mindset, innovative thinking,and ability to drive quality improvements end to end

Mentoring experience and contribution toquality engineering best practices across teams

Good to Have

Strong automation engineering backgroundwith hands-on framework design and coding

Experience with LLM evaluation,prompt/workflow validation, and agent guardrail testing

Hands-on expertise in Playwright for UI and end-to-end automation

Exposure to performance, resiliency, andobservability testing for AI systems

Proven experience testing APIs,integration flows, and CI/CD quality gates

Knowledge of retrieval-based systems,tool-calling workflows, and non-deterministic test patterns

Experience testing agentic AIapplications , including workflow accuracy, tool usage, and failurehandling

Experience with service virtualization,test data management, and synthetic test environments

Strong programming skills in Java,Python, or similar languages for automation

Familiarity with cloud-native testing indistributed/event-driven systems

Ownership mindset, innovative thinking,and ability to drive quality improvements end to end

Mentoring experience and contribution toquality engineering best practices across teams

#J-18808-Ljbffr

📌 Senior SDET (Ciudad de México)
🏢 Fulcrum Digital
📍 Ciudad de México