Senior Software Engineer in Test

Overview

Permanent, full-time, hybrid

Connecting clients to markets – and talent to opportunity.

With 4,300 employees and over 400,000 retail and institutional clients from more than 80 offices spread across five continents, we’re a Fortune-100, Nasdaq-listed provider, connecting clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.

At StoneX, we offer you the opportunity to be part of an institutional-grade financial services network that connects companies, organizations, and investors to the global markets ecosystem. As a team member, you'll benefit from our unique blend of digital platforms, comprehensive clearing and execution services, personalized high-touch support, and deep industry expertise. Elevate your career with us and make a significant impact in the world of global finance.

Business Segment Overview: A Swift-accredited service bureau and member, our Payments division provides NGOs, institutions and non-profits the ability to make a local difference, globally – with transparent pricing across 180+ countries and 140+ currencies. 

Technology Ecosystem:

• Languages & Frameworks:

  • Back End: C#, Microsoft.Testing.Platform, NBomber

  • Front End: Typescript, Playwright

• Architecture: Microservices, Event-driven (Kafka, AMQP), CQRS 

• Cloud & Infra: Azure, Kubernetes, Docker, Rancher 

• Databases: MongoDB, MS SQL Server, PostgreSQL

• Tooling: Git, Visual Studio, VS Code, Rider, Copilot, CI/CD pipelines (Azure DevOps, GitHub)

Responsibilities

Position Purpose: We’re looking for a Senior Software Engineer in Test to join our Global Payments team - someone who can blend hands-on test automation with end-to-end UAT. You’ll ensure our systems are secure, scalable, and ready for real-world operational workflows, while helping shape how quality is built into everything we deliver.

This is a high-impact role where you’ll work across development, QA, DevOps, and Operations. You’ll design automation frameworks, embed testing into CI/CD, and lead user acceptance testing for critical releases. It’s a chance to own both the technical and business-facing side of quality engineering, with a path toward future leadership opportunities.

Primary duties will include:

• Build and maintain automated tests across frontend, backend, and APIs (Playwright, xUnit, NBomber).

• Integrate automated checks into CI/CD pipelines (Azure DevOps, GitHub Actions).

• Implement secure testing practices (SAST, DAST, dependency scanning) with SecOps.

• Plan and execute UAT cycles for new features, upgrades, and bug fixes across Global Payments.

• Partner with developers, QA, and Ops to improve testability and workflows.

• Deliver clear UAT results and reports for project leads and stakeholders.

• Log, track, and resolve issues quickly to keep delivery on track.

Qualifications

To land this role you will need:

• 5+ years in test automation and/or UAT, ideally in financial services (cross-border payments).

• Strong coding/testing skills in JavaScript/TypeScript, Python, Java, or C#.

• Hands-on with automation frameworks (Playwright, Cypress, Selenium).

• Familiar with secure testing practices and tools (SonarQube, Snyk, Checkmarx, Trivy).

• Background in financial operations workflows (settlements, reconciliations, SWIFT, ISO 20022 a plus).

• Excellent communicator - able to collaborate across tech and business.

• Passion for quality, problem-solving, and continuous improvement.

Education / Certification Requirements: 

• Bachelor's degree in Computer Science, Software Engineering, or equivalent experience 

Working environment:

• Hybrid - private parking for employees.

• FTE (UoP).