Overview:
Connecting clients to markets – and talent to opportunity.
With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents. As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.
Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth.
Business Segment Overview: Engage in a deep variety of business-critical activities that keep our company running efficiently. From strategic marketing and financial management to human resources and operational oversight, you’ll have the opportunity to optimize processes and implement game-changing policies.
Responsibilities:
Primary duties will include:
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You will work in a self-contained scrum team to deliver new components of the Client Onboarding system
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You will design, create, and maintain automated tests for many testing levels: component, integration, system integration and end-to-end
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You, our ideal candidate should have a good understanding of RESTful API architecture and modern web application design, and a desire to share this knowledge with the other QA Engineers in your team
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You should be experienced with the full cycle of a software project: conception, development, deployment, and the continuous improvement stage
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You will take an active role in the entire sprint process from estimation and design to feature rollout and you will work with and pair with other members of the team of all disciplines, Product Owners, Developers, and other QA Engineers
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You will collaborate with other QA Engineers to develop effective strategies and test plans, and ensure quality throughout the software development lifecycle
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You will work closely with the Product team to review and analyze requirements and ensure end-to-end functionality meets initial expectations before a new feature is shipped.
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You will investigate defects and non-conformance issues
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You will investigate product quality to make improvements and achieve better customer satisfaction
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You will identify quality assurance process bottleneck and suggest actions for improvement
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You will participate in continuous improvement projects
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You will be expected to maintain a high level of conduct, ethical standards and values as well as maintain an appropriate level of competence through ongoing training, making requests for updates or development as required.
Qualifications:
To land this role you will need:
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3+ years of automation testing experience on the (preferably .NET stack or TypeScript) with:
- web UI tests (Playwright, Selenium or similar framework)
- Rest API tests
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Integrate Copilot agents with CI/CD pipelines such as GitHub Actions, Azure DevOps, and Jenkins to enable automated quality checks, and actionable feedback in delivery pipelines.
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Design, build, and configure GitHub Copilot agents to automate repetitive QA workflows, including test case generation
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Create prompt frameworks and evaluation criteria to ensure reliable, secure, and context-aware AI agent behavior in software testing scenarios.
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Use agentic AI to analyze requirements, user stories, API contracts, and existing test assets to recommend missing scenarios, edge cases, and risk-based test coverage improvements.
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Build workflows where AI agents assist with REST API testing by interpreting HTTP requests/responses, JSON payloads, and OpenAPI/Swagger definitions to propose or generate meaningful validation scenarios.
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Monitor and continuously improve AI agent performance through feedback loops, test-result analysis, and prompt/workflow refinement to increase accuracy and practical usefulness.
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Collaborate with QA, developers, and DevOps teams to embed AI-driven automation into the SDLC and establish scalable practices for intelligent test engineering.
- Excellent understanding of tests levels and their role
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Experience in Agile software development practices
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Experience in communicating with technical, non-technical stakeholders and management to review requirements, identify tasks, provide estimates, and meet production deadlines
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Experience with professional software engineering best practices for the full software development life cycle, including coding standards, code reviews, source control management, build processes, testing and operations
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Understanding of basic software architecture concepts
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Critical thinker and problem-solving skills
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Good team player
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Good time-management skills
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Ability to communicate in English
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Great interpersonal, communication and collaboration skills
What makes you stand out:
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Experience with client onboarding and account management systems, fraud & compliance systems
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Experience with non-functional tests (Performance, Usability, etc.)
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Experience working with distributed, multidisciplinary teams
Work environment:
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Office located in São Paulo
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Hybrid model (4 days/week in the office, 1 day/week remote)
Benefits:
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Medical and life insurance
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Public Transportation Voucher
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Meal and food allowances
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TotalPass or Gympass
#LI-Hybrid #LI-DK1
