StoneX - Senior Software Developer - Test - Trading Applications

Role Overview :

We are looking for a Senior Software Developer in Test (SDET) with a strong development background to join our trading technology team. This role is development-heavy (70% development, 30% testing) and requires a professional who can design, build, and maintain automation frameworks, while owning end-to-end testing of complex, high-performance trading platforms.

This is not a traditional QA or manual testing role. We are specifically looking for candidates with a developer mindset who work closely with engineering teams to embed quality into the SDLC.

Business Context :

The team supports integration with MetaTrader / MetaQuotes platforms, delivering real-time trading functionality through a distributed, low-latency, multi-threaded system. The platform handles critical financial transactions and requires high reliability, scalability, and performance.

Technology Stack :

- Programming : C++, C#, .NET

- Automation & BDD : SpecFlow, Gherkin

- APIs & Messaging : RESTful services, messaging systems

- Version Control & CI/CD : Git, TeamCity

- Test Management & Tracking : Jira, TestRail

- Architecture : Distributed systems, Windows Services

Key Responsibilities :

- Design, develop, and maintain robust automation frameworks and testing tools

- Actively contribute production-quality code to support testability and automation

- Own end-to-end testing of backend services and trading platform integrations

- Define and implement automation strategy and ensure optimal test coverage

- Collaborate with developers, BAs, and business stakeholders from concept to release

- Review application code and identify quality, performance, and reliability risks

- Debug system issues by analyzing logs, services, and distributed workflows

- Create and maintain BDD specifications and automated test cases

- Participate in sprint planning, estimation, stand-ups, and retrospectives

- Support releases across multiple environments through UAT and production

- Continuously improve QA practices, standards, and automation pipelines

- Act as a quality champion within Agile teams

Must-Have Skills :

- Strong programming fundamentals with hands-on experience (preferably C#, C++)

- Proven experience building and maintaining test automation frameworks

- Experience with BDD / ATDD tools such as SpecFlow

- Experience testing complex backend systems, APIs, and messaging services

- Strong understanding of SDLC, Agile practices, and CI/CD

- Experience debugging production-grade applications

- Basic SQL knowledge

Good to Have :

- Experience in financial or trading systems (FX, CFDs, trading platforms)

- Experience working on low-latency or high-performance systems

- Experience reviewing and collaborating on application code

- Experience building internal tools or utilities to support testing

- Familiarity with MetaTrader or similar trading platforms

What Were Looking For :

- A developer first, tester second

- Someone who enjoys coding, debugging, and problem-solving

- Strong ownership mindset and ability to work in a fast-paced environment

- Excellent collaboration and communication skills

Working Model : Hybrid / In-office (as per business requirement)