Senior Software Development Engineer in Test

Join to apply for the Senior Software Development Engineer in Test role at Deluxe . Overview Position title: Senior Software Development Engineer in Test (Sr. SDET) Experience: 8+ years Location: Hybrid role located in Guadalajara, Mexico Industry: Media & Entertainment About The Role We are looking for a Senior Software Development Engineer in Test (SDET) with deep expertise in software development, modern programming practices, BDD-driven methodologies, AWS, SQL, NoSQL, RESTful APIs, AI productivity tools, and QA methodologies to join our engineering team. You will design and own service-level automation frameworks and CI/CD quality gates, which will require an expert level of programming knowledge.

You will be a key part of the scrum team, leading QA decisions for backend automation. You will partner closely with the development team to shape the testing, define the API contract expectations, own integration testing, and drive shift-left practices while mentoring others in this practice. We value strong automation skills over expertise in any specific language. We are rebuilding a legacy system into a modern, scalable platform, REST APIs, and cloud-native architecture.

In this role you own backend/API quality - defining and verifying service contracts, driving integration testing, validating data correctness across the many systems, ensuring seamless integration across API and database layers. This role is ideal for a highly motivated engineer who thrives in small, dynamic teams and takes ownership of problems—designing, developing, and executing QA automation solutions without waiting for step-by-step instructions.

Responsibilities

Design, develop, and maintain automated test systems for API testing Adopt a BDD-driven approach for selective, high-value business-readable scenarios that enable clarity between Product and Engineering. Write, execute, and automate test plans that cover REST API validation, database operations, and load testing. Collaborate with other backend engineers ensuring cohesive end-to-end testing. Lead test data strategy for backend services and implement self-service utilities that the UI teams can reuse.

Participate in sprint planning, design reviews, and product discussions. Advocate for testability and quality. Investigate and debug issues, conduct root cause analysis. Research and review test productivity tools and libraries, making recommendations to improve the overall productivity of the team.

Champion QA best practices with the team. Required Skills & Experience 8+ years in software test engineering including 4+ years creating and maintaining test automation frameworks for API and DB testing. Proven strong coding experience in at least one or more programming languages. Ability to write tests using a BDD framework (e.g., Behave).

Solid grasp of software engineering fundamentals, design patterns, and best practices. Hands-on API testing, contract testing. Solid CI/CD experience (Jenkins, GitHub Actions, etc.) and Git best practices. Comfort with cloud and containers (AWS, Docker) and with databases such as SQL and NoSQL.

Comfort with security best practices and testing tools such as OWASP ZAP, RESTler, etc. Proven analytical and problem-solving skills with a demonstrated ability to work both independently and in a team environment Comfortable working in Agile/Scrum teams, using tools like JIRA and Confluence. Proficiency in leveraging and evaluating AI-assisted coding tools (e.g., GitHub Copilot, OpenAI Codex, Claude Code) to accelerate development, improve code quality, and enhance productivity. Awareness of frontend security best practices, including handling authentication flows and preventing common vulnerabilities such as XSS and CSRF.

Preferred Qualifications Prior experience in the media & entertainment industry. Strong Python coding skills. Knowledge of performance testing tools and practices. Knowledge of messaging architecture and protocols (RabbitMQ, Kafka, NATS, etc.) Knowledge of Postman for API testing Basic experience in UI automation (Playwright preferred, Selenium acceptable).

Soft Skills Strong ownership mindset with the ability to define and drive quality strategy, not just execution. Excellent communication and collaboration skills, especially in cross-functional Agile teams. Candor in communication even when things are off-track. Surface risks early, owns mistakes, and helps create a clear path to success when things go wrong.

Comfortable mentoring junior engineers and influencing engineering culture. Ability to understand the big picture and prioritize work accordingly. Systems thinking: Understand service boundaries, contracts, and data flows. Anticipates both normal behavior and edge cases.

Clarity-seeking but ambiguity tolerant. Asks for specifics when it adds value but can break down an ambiguous task into actionable work.

About The Company

Deluxe, a subsidiary of Platinum Equity, is a global leader in media and entertainment services for film, video, and online content. Since 1915, Deluxe has been the trusted partner for the world’s most successful Hollywood studios, independent film companies, TV networks, exhibitors, advertisers and others, offering best-in-class solutions in post-production, distribution, asset and workflow management, and cloud-based technologies. With headquarters in Los Angeles and offices around the globe, the company employs over 3,500 of the most talented individuals, developers, and industry veterans worldwide. For more information, please visit #J-18808-Ljbffr