Quality Assurance SDET Engineer

oneZero Financial Systems•Somerville, MA

4d•$95,000 - $122,000•Onsite

About The Position

oneZero Financial Systems is hiring a Quality Assurance SDET Engineer for its Somerville office. The company provides trade routing and execution technology for banks, brokerages, and hedge funds, with a platform deployed at more than 200 entities globally. The role focuses on end-user needs and ensuring complex product features and business workflows work reliably and intuitively in real-world use. The SDET supports quality throughout agentic AI-assisted code delivery by helping define clear requirements, user personas, and workflows; creating effective tests and guardrails; and independently validating behavior, compatibility, usability, and performance before release. The position works across the testing pyramid, improves application testability, and partners with engineering and product teams to identify risks early and deliver high-quality experiences. The successful candidate will champion quality practices, develop and maintain automation and test frameworks, apply AI-assisted automation alongside BDD and TDD practices, and contribute to Agile team delivery. The role also calls for finance-domain knowledge and participation in production troubleshooting with supervision. The stated salary range is $95,000 to $122,000, depending on relevant experience.

Requirements

Bachelor’s degree in a science field; Computer Science, Math, Engineering, or MIS is preferred.
3–6 years of software development or automation development experience.
Experience with AI, CI/CD, BDD/TDD, C#, relational databases, performance tools, and Python or JavaScript.
3–6 years of finance-industry experience.
Intellectual curiosity and demonstrated ability to learn quickly.
Ability to understand business workflows, analyze systems, work effectively with others, and independently carry out work while maintaining professional knowledge.

Nice To Haves

Finance-industry experience in FX, cryptocurrency, commodities, or algorithmic trading is ideal.
A degree in Computer Science, Math, Engineering, or MIS.

Responsibilities

Combine financial business subject-matter knowledge with technical skills and help create user-centered feature context for test plans.
Understand complex financial instruments, business rules, and user workflows; build subject-matter expertise in the application and advocate for the end-user experience.
Ensure stories and epics meet Definition of Ready and Definition of Done standards.
Identify automation framework updates needed to support tests for new features, and apply AI-first automation and BDD/TDD practices.
Use AI prompts, agents, and skills to create code and tools, and understand how to develop and support a repository for a shared agentic automation solution.
Design, create, and review automation that validates intended functionality; write automated tests, participate in code reviews, and identify and fix issues in AI agents and code.
Work across all levels of the testing pyramid and contribute to testability improvements.
Integrate automated tests into CI/CD pipelines and monitor and maintain them.
Investigate and resolve acceptance-test and test-case discrepancies in a timely manner.
Use performance automation tools to create performance test scripts.
Automate and validate end-to-end GUI-based system workflows and proactively refactor test automation.
Participate in squad or Scrum teams and pair with developers on parallel development and testing.
Estimate stories and individual capacity accurately; identify inefficiencies, communicate them, and promote change and continuous improvement using Kaizen principles.
Understand test-framework architecture, tooling, and AI-agent infrastructure; contribute to and suggest framework improvements.
Work with REST/API, GUI, performance, ETL/big-data, and custom test frameworks or solutions.
Understand the production support model and how production environments are deployed and configured; contribute to production troubleshooting and use-case replication with supervision.
Demonstrate customer orientation, cooperation, quality focus, initiative, results orientation, and independent workmanship.