SDET Engineer

Job description

**About Us** OpenFX is on a mission to move money as freely as data, unrestricted by time zones, banking hours, or legacy systems. We are building the infrastructure that will power the next generation of cross-border payment systems for institutions. The team's execution has been exceptional, and we're scaling at a remarkable pace. Our stellar early team comes with experience in companies like J.P. Morgan, Goldman Sachs, FalconX, Paypal, Affirm, Polygon, Kraken, Nium & others. We're backed by Accel, Faction, NfX, Accomplice, and other top-tier investors. **Role Overview** As our systems grow in complexity and volume, we need an SDET Engineer who can go beyond writing scripts to architecting test frameworks that are scalable, stable, and AI-leveraged. You will ensure that our high-velocity deployment pipeline—moving real money—remains robust while reducing manual intervention to near zero. This is a hands-on, high-impact role where you will directly strengthen the reliability of our financial infrastructure. **Key Responsibilities** - Design and optimize high-performance automation frameworks using Java/RestAssured and JS/Playwright - Own the integration of tests into CI/CD pipelines and manage containerized test environments (Docker/Kubernetes) - Architect load and stress testing suites using JMeter or k6 to simulate high-traffic financial events - Establish patterns for the team to use AI (Copilot, LLMs) for synthetic data generation and automated Root Cause Analysis - Develop complex test scenarios for transaction idempotency, ledger consistency, and financial calculation validation - Provide technical guidance and code reviews to ensure high standards of clean, reliable code - Drive 100% automation coverage of critical-path financial flows within the same sprint - Achieve 40%+ reduction in regression time through parallelization and AI-assisted scripting **What We're Looking For** *Required* - 3 to 7 years of experience in SDET or Backend Development roles - Expert proficiency in Java, JavaScript, or Python - Proven experience building or significantly extending automation frameworks (RestAssured/Playwright) - Strong understanding of relational databases (SQL) and API security (OAuth, HMAC signing) - Expert knowledge of Maven, TestNG, and Git (complex branching/merging) - Strong fundamentals in Data Structures and Algorithms *Preferred* - Deep familiarity with AWS (S3, CloudWatch, EKS) - Experience managing test runners in Docker or Kubernetes - Hands-on experience with JMeter or k6 for load testing - Proactive use of AI tools to increase engineering velocity **What We Offer** - Competitive salary and benefits package. - Equity in a rapidly growing company. - Opportunity to work in a fast-paced startup at the forefront of fintech innovation. - Opportunity to make a significant impact on global financial infrastructure. - Collaborative work culture with emphasis on personal and professional growth. We are committed to building a diverse and inclusive workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.