Senior Software Engineer

  • StoneX Group Inc.
  • Krakow, Poland
  • 20/11/2023
Full time Forex Fintech IT - Software Development

Job Description


Permanent, full-time, hybrid (3 days per week in an office)

Company Profile

StoneX Ltd is an FCA authorised and regulated firm to provide trade execution, clearing and advisory services focusing primarily on the Commodities and Foreign Exchange sectors.

StoneX Ltd is part of the StoneX Inc. which is a Fortune 500 company, providing customers across the globe with services including execution and advisory services in Commodities, Capital Markets, Currencies and Asset Management.


We operate globally from offices in Europe, US and Asia Pacific. Our employees work closely together in multidisciplinary teams, making our success possible.

Technology - At StoneX, technology is at the heart of everything we do. Our technologists push the limits of possibility, embracing the right technology that adds value to our business. In our fast-paced environment, short feedback loops collaborating with our business partners allows us to deliver projects into production quickly.

Focus – Our teams are business aligned developing and supporting complex solutions across Trading, Risk, Compliance and Operations.


We are looking for a hands-on Senior Software Engineer with experience in building high-performing, scalable, enterprise-grade applications. The role will encompass architecture and development across all tiers of the application stack.

You will be part of a talented engineer team that works on low-latency mission-critical applications. Roles and responsibilities include application architecture and development across full software development lifecycle from concept and design to testing, collaborating with like-minded engineers. Technically leading team of highly skilled software engineers, forging relationships with key stakeholders across diverse user base.


  • Primary focus on server-side development
  • Contribute to all phases of the development lifecycle working within Agile methodology
  • Write well designed, testable, efficient code
  • Ensure designs follow specifications
  • Prepare and produce releases of software components
  • Support continuous improvement by investigating new technology and presenting for architectural review


  • BS/MS degree in Computer Science, Engineering or a related subject
  • Minimum 5 years’ experience ideally within Financial services, FinTech
  • Extensive experience developing complex distributed event-based microservices using Java/Spring (ideal) or C#/.Net Core
  • Experience with NodeJs
  • Some experience building web-based applications using React / Typescript,
  • Experience with containerisation (Docker, Kubernetes)
  • Experience with cloud platforms (Azure, AWS)
  • Exposure with distributed messaging / streaming platforms (Apache Kafka)
  • Experience build CI/CD pipelines (ideally Azure DevOps)
  • Experience with TDD/BDD, testing framework (Jest/React-testing-library/Junit)
  • Excellent knowledge of Relational Databases SQL and No-SQL databases
  • Experience working as part of global Agile team
  • Fluent English