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  • All offersNiepołomiceNetSenior .NET Software Engineer (B2B)
    Senior .NET Software Engineer (B2B)
    Stonex Poland

    Senior .NET Software Engineer (B2B)

    Stonex Poland
    Type of work
    Employment Type
    Operating mode
    Stonex Poland

    Stonex Poland

    🔹 We are a member of the Fortune 100 with 3,900 employees. 🔹 140+ currencies - StoneX Group Inc. offers currencies across 185 countries. 🔹 StoneX Group Inc. connects with clients in nearly 80 offices across 6 continents.

    Company profile

    Tech stack

      Global system
















      Azure DevOps




    Job description

    B2B, full-time, hybrid (3 days per week in an office) 


    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. 


    Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, The StoneX Group is made up of four segments that offer endless potential for progression and growth. 


    Business Segment: 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. 


    Position Purpose: We are looking for a hands-on Senior .NET Software Engineer on B2B 12-month contract 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.

    Technology Ecosystem:

    • Front-End: JavaScript, React/React JS
    • Back End: C# .Net Core, SQL
    • Architect: Microservices Architecture, monolithic Architecture
    • Cloud: Azure, AWS or GC


    Primary Duties will include: 

    • Primary focus on server-side development
    • Contribute to all phases of the development lifecycle working within Agile methodology
    • Write well designed, testable, efficient code following design principles/patterns such as Singleton.
    • Prepare and produce releases of software components
    • Mentor and support engineers with technical direction and best practises
    • Support continuous improvement by investigating new technology and presenting for architectural review
    • This list of duties and responsibilities is not intended to be all-inclusive and can be expanded to include other duties or responsibilities that management deems necessary.


    To land this role you will need:

    • Minimum 8+ years of experience building global enterprise level systems
    • Extensive experience developing complex distributed event-based microservices using C#/.Net Core
    • Knowledge with containerisation (Docker, Kubernetes)
    • Experience with cloud platforms (Azure, AWS)
    • Exposure with distributed messaging / streaming platforms (Apache Kafka)
    • Involvement building CI/CD pipelines (ideally Azure DevOps)
    • Excellent knowledge of Relational Databases SQL and No-SQL databases

    What makes you stand out: 

    • Having worked on a global product within a multitude of time zones
    • Experience with TDD/BDD, testing framework (est/React-testing-library/Junit)
    • Some experience building web-based applications using React / Typescript
    • Experience working as part of global Agile team

    Education / Certification Requirements:

    • BS/MS degree in Computer Science, Engineering or a related subject or equivalent professional experience

    Working environment:

    • Hybrid work from Kraków (2 days from home, 3 days from the office)