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Senior.NET Developer (Docker/Kubernetes)
  • Kraków
Senior.NET Developer (Docker/Kubernetes)
Kraków, Kraków, Lesser Poland Voivodeship, Polska
StoneX Financial LTD Sp. z o.o. Oddział w Polsce
5. 9. 2025
Informacje o stanowisku

technologies-expected :


  • C#
  • .NET
  • .NET Core
  • ASP.NET MVC
  • Web API
  • Active MQ
  • Rabbit MQ
  • Microsoft SQL Server
  • T-SQL
  • Kafka
  • Kubernetes
  • Docker
  • Azure DevOps

technologies-optional :


  • TeamCity
  • Octopus

about-project :


  • Position Purpose:  This role is ideal for a seasoned .NET engineer who thrives on ownership, enjoys mentoring others, and wants to work on robust APIs that power real trading - including authentication, pricing, order handling, and more.
  • You’ll be an essential part of a highly skilled product team, collaborating with other engineers, tech leads, and QAs to build scalable, high-performing systems used by thousands of clients.
  • 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.
  • Technology Ecosystem:
  • Languages & Frameworks: C#, .NET Core, ASP.NET
  • Architecture: Microservices, Event-driven (Kafka, AMQ), CQRS
  • Cloud & Infra: Azure, Kubernetes, Docker, Rancher
  • Databases: MS SQL Server (T-SQL), NoSQL (a plus)
  • Tooling: Git, Visual Studio, CI/CD pipelines (TeamCity), Octopus, Grafana

responsibilities :


  • Develop highly performant solutions using the latest .NET technologies. Build performant, scalable backend services from scratch, or improve existing ones.
  • Build applications from scratch or pick up existing applications and modify them to meet business or technology needs.
  • Tackle live production challenges - debug, diagnose, and solve with confidence.
  • Design and build APIs and backend logic to support high-volume trading systems.
  • Work closely with team leads and stakeholders to shape features and architecture.
  • Write clean, testable code with a TDD/BDD-first approach. Strong focus on solution design, performance, and scalability.
  • Support and mentor junior engineers in the team.
  • Participate in code reviews, design sessions, and agile ceremonies.
  • Continuously explore and evaluate new technologies that could enhance the platform.
  • Maintain an appropriate level of competence through ongoing training, making requests for updates or development as required.

requirements-expected :


  • 5+ years of experience in backend .NET/C# development.
  • Solid grasp of .NET Core, RESTful APIs, multithreading, and system performance .
  • Experience using Kubernetes or Docker – it’s a must!
  • Experience working with high-traffic APIs and messaging systems like ActiveMQ.
  • Good SQL Server/T-SQL knowledge; NoSQL is a plus.
  • Familiarity with CI/CD, agile practices, and DevOps tools (TeamCity, Octopus).
  • Strong communication skills and the ability to collaborate across teams.
  • A growth mindset and eagerness to stay current with industry trends.
  • Experience with financial systems or real-time data? Big bonus.
  • Bachelors degree in Computer Science, Software Engineering, or equivalent experience

offered :


  • Hybrid - private parking for employees.
  • FTE (UoP).

benefits :


  • sharing the costs of sports activities
  • private medical care
  • sharing the costs of professional training & courses
  • life insurance
  • remote work opportunities
  • flexible working time
  • fruits
  • corporate products and services at discounted prices
  • integration events
  • parking space for employees

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