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Senior .NET Developer with WPF and REST APIs, Portfolio Management System

  • Krakow
  • Lodz
  • Lublin
  • Remote.Poland
  • Warsaw
  • Wroclaw
Medium team (10-20 people)

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Project overview

The project focuses on building and evolving a Portfolio Management System that includes backend services, messaging, and desktop-based user interfaces. The solution integrates multiple systems, processes large volumes of data, and supports continuous delivery through automated pipelines.

Team

You will work in a cross-functional team consisting of backend developers, desktop developers, QA engineers, and DevOps specialists. The team collaborates closely through code reviews, shared technical discussions, and iterative delivery.

Position overview

We are looking for a Senior .NET Developer to work on a long-term Portfolio Management System that combines backend services, desktop applications, and system integrations. You will be involved in designing, developing, and maintaining reliable software solutions that support complex business processes and data-intensive workflows.

Technology stack

C#, .NET, Entity Framework, ADO.NET, MS SQL Server, RESTful APIs, RabbitMQ, CI/CD pipelines, VSTO, WPF, WCF, Win Services, ASP.NET, MS Azure, and TeamCity

Responsibilities

  • Design and develop backend services using C# and .NET
  • Develop, support, and enhance WCF services to enable reliable internal and external system integrations
  • Implement and maintain RESTful APIs for internal and external integrations
  • Work with MS SQL Server using Entity Framework and ADO.NET
  • Develop and support desktop applications using WPF and VSTO
  • Integrate asynchronous messaging solutions using RabbitMQ
  • Collaborate with the team on architecture decisions and technical improvements
  • Participate in code reviews, contribute to code quality, and maintainability
  • Support CI/CD processes and ensure smooth delivery of new features

Requirements

  • Commercial experience with C# and the .NET platform
  • Hands-on experience developing VSTO-based solutions
  • Experience developing backend applications and RESTful APIs
  • Hands-on experience developing and maintaining WCF services
  • Strong practical experience with Entity Framework and ADO.NET
  • Practical knowledge of MS SQL Server and relational database design
  • Experience with WPF for desktop application development
  • Familiarity with message queues, preferably RabbitMQ
  • Understanding of CI/CD principles and automated delivery pipelines
  • Ability to work collaboratively in a team-oriented environment

Nice to have

  • Exposure to large-scale or enterprise-level systems
  • Experience in maintaining legacy applications alongside new development
  • Basic knowledge of application performance optimization and troubleshooting

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We offer

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Vacation

As per the laws of your country. We do ask you to take a proper rest

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Health insurance

We help you to take out an insurance policy for you and your loved ones

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Sick pay

10 days without a doctor's note, afterwards - as per the laws of your country

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Time off for state holidays

According to the official calendar, regardless of the client’s schedule

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Pleasant environment

Two large corporate parties and many small get-togethers for colleagues

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Comfort service

Solving technical and everyday problems at work

The benefits package may vary depending on the region and the type of contract
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FAQ for Candidates

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DataArt offers competitive compensation along with a range of thoughtful benefits that support your well-being, growth, and daily comfort. You’ll get flexible vacation and sick leave, mental health programs, and access to a corporate laptop or BYOD option. We also offer bonuses for referrals, parental leave, and smooth exit and return-to-work options.

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