Quality Assurance SDET Engineer

Come join oneZero Financial Systems! An exciting, fast-growing company with Headquarters in Somerville, MA. oneZero empowers banks, brokerages and hedge funds with cutting edge trade routing and execution technology. Our platform, deployed with 200+ entities globally, features a low-latency trading environment, integrations to the world’s leading execution venues, and reliable IT infrastructure and technical support—all designed to be customized and scaled to serve any business model and any size of market participant.

We take pride in our great work atmosphere and highly motivated team of engineers. We are currently looking for a motivated and talented Quality Assurance SDET Engineer to join our Somerville office.

oneZero is proud to have been named one of Business Intelligence Group's Best Places to Work for four consecutive years:

oneZero earns 2025 Great Place To Work Australia Certification:

The Boston Globe names oneZero a Top Place to Work in 2022, 2023, and 2024:

SDET with an end user focus. Understand complex product features, business workflows, and user needs to ensure software works reliably and is intuitive in real-world use. Ensures quality throughout agentic AI code delivery by helping to define clear requirements, user personas and workflows to guide and support AI-assisted implementation with effective tests and guardrails, and independently validating behavior, compatibility, usability, and performance before release.

Works across the testing pyramid, improves application testability, and partners with engineering and product teams to identify risks early and deliver high-quality experiences.

• Combine business finance subject matter expertise with grounded technical skills
• Help create user centric feature context to help generate complete and accurate test plans
• Able to understand complex financial instruments and business rules
• Understands of each tier of the testing pyramid
• Ensure stories and epics to meet both Definition of Ready (DoR) and Definition of Done (DoD)
• Identify automation framework updates to support new feature tests
• Apply AI/automate first BDD and TDD best practices

• Performative understanding of AI prompts, agents, skills to create high-quality code and tools
• Understand how to develop/support code repository that supports a common Agentic automation solution.
• Design, create and review automation to ensure complete automation that validates the intended functionality
• Ability to write automated tests and participate in code reviews and able to identify and fix AI agents and code
• Able to work at all levels of the test pyramid
• Ensures automated tests are incorporated into CI/CD pipeline, monitors and maintains tests
• Investigates and resolves acceptance test and test case discrepancies in a timely fashion
• Able to work with performance automation tools to create performance test scripts
• Automate and validate end to end GUI automation-based system workflows
• Proactively refactors test automation

• Participate in squad/scrum team and buddy up with developers on parallel development and testing
• Able to accurately estimate stories and one’s own capacity
• Identify inefficiencies, communicate and be an agent of change and improvement
• Applies Kaizen principles to daily work

• Has business domain experience and extends business domain through purposeful study

• Understands what and why of user workflows in functional areas of responsibility
• Demonstrates analytical, systems thinking
• Acquire subject matter expertise in application under test
• Acquire end user knowledge to the point you can be an advocate for the customer experience