Senior .NET Engineer (WinForms)

Posted 22 Days Ago
Be an Early Applicant
Lviv
In-Office
Senior level
Information Technology • Software
The Role
Develop and maintain a .NET desktop application, implement new features, fix bugs, refactor code, and ensure compliance with security standards.
Summary Generated by Built In

Our client owns a mature .NET desktop product that has been successfully operating on the market for 20 years. It is a business-critical solution for auditing and tax consulting companies in Switzerland and is tightly aligned with legal and regulatory frameworks that are updated on a yearly basis. The application is predominantly a Windows Forms desktop solution, integrated with cloud databases and complemented by a small number of web-based integrations.

We are looking for a Senior .NET Engineer (WinForms) to join our team.

Requirements:
  • Six years of working experience with .NET (at least)
  • Excellent knowledge of C#, .NET Framework
  • Five-year hands-on experience with Windows Forms in production systems
  • Solid understanding of desktop application architecture and deployment models
  • Strong experience with SQL and ADO.NET
  • Practical experience with Microsoft SQL Server, PostgreSQL
  • Understanding of database design, transactions, and performance optimization
  • Experience working with REST APIs and third-party integrations
  • Understanding of basic design patterns
  • Ability to work independently with huge codebases
  • Strong analytical and problem-solving skills
  • High attention to code quality, stability, and maintainability
  • Experience with cloud integration or hybrid desktop–cloud solutions (would be a plus)
  • Familiarity with encryption and security principles (AES, RSA, obfuscation) (would be a plus)
  • Awareness of data protection regulations (GDPR, Swiss Data Protection Act) (would be a plus)
  • Bachelor’s or Master’s degree in computer science (or similar technical field)
  • English level: Upper-Intermediate or higher
Responsibilities:
  • Develop and maintain a mature .NET desktop application used in regulated environments
  • Implement new features based on business and regulatory requirements
  • Fix bugs, troubleshoot production issues, and improve system stability
  • Refactor and optimize existing code with a focus on performance and maintainability
  • Work closely with the current lead developer during the handover phase
  • Gradually take ownership of core modules and system components
  • Participate in defining and evolving technical and architectural decisions
  • Contribute to shaping a long-term modernization roadmap (starting from year 2)
  • Write and maintain technical documentation to ensure knowledge continuity
  • Perform code reviews and promote best development practices
  • Develop automated unit/integration tests
  • Collaborate with other developers and act as a technical mentor when needed
  • Ensure compliance with security and data protection requirements
  • Support regular releases, versioning, and deployments
We offer:
  • Interesting and challenging projects
  • Competitive compensation and regular results-based salary review
  • A broad range of professional education and personal development possibilities
  • Comfortable and cozy working environment
  • Motivated colleagues with profound knowledge of the technical field

Accelerate your career with Leobit!

Top Skills

.Net Framework
Ado.Net
C#
Cloud Integration
Microsoft Sql Server
Postgres
Rest Apis
SQL
Windows Forms
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The Company
HQ: KraKów
189 Employees

What We Do

Leobit is a full cycle web, .NET, and mobile application development provider for the technology companies and startups primarily located in the US, EU, and the UK.

Our technology focus covers .NET, Angular, Azure, iOS, Android, Ruby, PHP, React, Flutter, and a comprehensive range of other technologies from the Microsoft, Web, and Mobile Stacks.

Leobit has representative offices in Austin, TX (USA), Tallinn (Estonia), Krakow (Poland) and the development center in Lviv (Ukraine) with 170+ strong software engineers, architects, testers, and UI/UX designers available for outsourced development or team extension projects, as well as for technical application maintenance and support.

Leobit main achievements:
- Microsoft Solutions Partner for Digital & App Innovation
- ISO 9001:2015 and ISO 27001:2013 Certified
- Top .NET Developer in Ukraine 2023 by Clutch
- ISTQB Gold Partner
- Top Employer in Lviv, Ukraine 2023 by DOU

Contact us at [email protected] and get a quote for your project.

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