Senior Software Development Engineer; SDET - Donnelley Financial, LLC - Rockville, Maryland

Position: Senior Software Development Engineer (SDET) Description:Join a dynamic team at the pulse of global markets, where we deliver innovative software and service solutions for essential financial reporting and capital markets transactions. At DFIN, we are a values-driven organization that empowers you to build a fulfilling career while bringing your authentic self to work every day. Our "Win as One" mentality ensures that our team's success is directly linked to Client, Shareholder and Employee Satisfaction.Recognized as one of AMERICA'S MOST LOVED WORKPLACES for five consecutive years and aBuilt In Best Places to Work for six years, we are committed to our employees' total well-being. Enjoy competitive compensation, a flexible workplace, comprehensive benefits, and opportunities for professional growth. Bring your passion and talents to DFIN - because being YOU thrives here.Summary:We are seeking a highly skilled Senior Software Development Engineer in Test (Senior SDET) to provide technical leadership for quality engineering across our enterprise SaaS platforms. This role is responsible for defining and driving test strategy, automation frameworks, and quality standards across multiple development teams while remaining hands-on in critical areas of test automation. The Senior SDET partners closely with Engineering and Product stakeholders to ensure scalable, reliable, and compliant software delivery in highly regulated environments. This role emphasizes leadership, strategy, and cross-team influence, with execution serving quality outcomes.Responsibilities:Drive QA and test strategy across multiple Agile development teams * Own test scope, coverage, and traceability back to requirements and acceptance criteria * Identify quality risks in system architecture and design; define mitigation strategies * Ensure test execution supports a production release cadence without compromising quality * Enforce QA standards, tools, and best practices across teams * Drive au