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Senior SDET Engineer

Location: [Fully remote]

.Monks Technology Services, part of Media.Monks and S4 Capital, is a global consulting firm mastering AI-powered transformations for the Fortune 100. We combine long-term strategic thinking, deep enterprise experience, and a human-centered approach to help clients transform business processes and dominate their industries.

As part of our commitment to inclusion and in compliance with Law 2466 of 2025 from Colombia, we have available spaces for people with disabilities.

About the Role

As a Senior SDET Engineer, you’ll own the quality gate for an agentic codebase in which human engineers and AI coding agents work side by side. Embedded within a .Monks delivery team, you’ll collaborate with clients, product leaders, and engineers to define what “done and correct” means, validate functional correctness, and determine whether work is ready for production. You’ll also shape how tools such as Claude Code and Codex support quality throughout a fast-moving development lifecycle.

Responsibilities

• Own acceptance testing, functional validation, regression coverage, and release-quality decisions for human- and AI-generated code
• Define clear acceptance criteria and quality standards in partnership with clients, product teams, and engineers
• Design, implement, and maintain automated test suites and frameworks across web, API, and end-to-end workflows
• Integrate automated testing into CI/CD pipelines and agentic development workflows
• Review and validate code quality, system behavior, and production readiness
• Identify edge cases and failure modes that may be overlooked during development
• Investigate test and production failures, determine root causes, and drive issues through resolution
• Shift quality practices upstream to help engineers and AI agents produce more reliable work
• Communicate quality risks, expected behavior, and release recommendations clearly to technical and non-technical stakeholders
• Contribute to the evolution of testing and evaluation frameworks for AI-assisted software delivery
• Other duties as assigned

About You

Qualifications & Skills

• 8+ years of experience in SDET, quality assurance, or test automation, including ownership of test strategy
• Strong programming skills in TypeScript, JavaScript, and/or Python
• Proficiency with modern testing frameworks such as Playwright, Cypress, Vitest, Jest, or pytest
• Demonstrated experience defining acceptance criteria and performing functional validation beyond unit-level CI checks
• Experience designing and maintaining automated tests for web, API, and end-to-end workflows
• Strong understanding of CI/CD tooling, pipelines, and quality-gating practices
• Ability to review, challenge, and gate work produced by both engineers and AI coding agents
• Strong systems thinking, with the ability to assess both implementation quality and functional correctness
• A skeptical, investigative approach to identifying edge cases, hidden assumptions, and failure modes
• Strong English communication skills and the ability to define expected behavior for clients, engineers, and AI agents
• Comfort working in a fast-paced, agile consulting environment
• Experience testing AI or LLM systems, non-deterministic outputs, or agentic workflows is a plus
• Performance, load, or security testing experience is a plus
• Experience with behavior-driven development and tools such as Gherkin is a plus
• Experience building evaluation, testing, or quality frameworks from scratch is a plus

.Monks Technology Services does not discriminate on the basis of race, sex, color, religion, age, national origin, marital status, disability, veteran status

#LI-Remote #LI-BC1

About Monks

Monks is the global, digital-first, data-driven, unitary operating brand of S4Capital plc, where our culture centers on how we show up for the work and for one another. That begins with the commitment to strive for mastery—taking deep pride in our craft and creating work that sets the bar. In everyday execution, we drive momentum by choosing bold action rather than waiting for certainty. Above all, our teams are stronger together, bringing diverse perspectives into a unified team that communicates with clarity, trust, and mutual respect.
 
This commitment to craft and innovation translates directly into widespread industry acclaim: Monks was named a Contender in The Forrester Wave™: Global Marketing Services and a leader in the 2026 Gartner® Magic Quadrant™ for Global Digital Marketing Agencies. It ranks among Cannes Lions' Top 10 Creative Companies (2022-25) and remains the only partner featured in AdExchanger’s Programmatic Power Players list every year (2020-24). Named Adweek’s first AI Agency of the Year (2023) and The One Show’s inaugural AI Pioneer Organization (2025), Monks was also awarded Business Intelligence Group’s 2026 Excellence in Artificial Intelligence Award in the Human-Machine Interaction Team category. Additionally, Monks.Flow earned AI-based Marketing Solution of the Year at the 2026 AI Breakthrough Awards and a 2026 Global Generative AI Award in the Agentic Marketing Innovation category. Finally, Monks achieved a record-breaking number of FWAs and continues to hold the most of any partner.

We are an equal-opportunity employer committed to building a respectful and empowering work environment for all people to freely express themselves amongst colleagues who embrace diversity in all respects. Including fresh voices and unique points of view in all aspects of our business not only creates an environment where we can all grow and thrive but also increases our potential to produce work that better represents—and resonates with—the world around us.