Senior .NET Software Engineer

Intro: we are looking for a Senior .NET Developer to join our team and contribute to the development and evolution of large-scale POS and loyalty systems used in pharmacy retail operations.

The challenge:
In this role, you will work on maintaining and improving existing systems, implementing new functionality, and refactoring legacy components to improve performance, reliability, and maintainability.

The team: you’ll join the team of: NET Engineers, Staff Engineer, Quality Engineer, Product Owners and Business Analysts. You'll work closely with every one of them.

What you will do:

• Develop and maintain large-scale POS and loyalty systems used daily in hundreds of pharmacy locations.
  
• Integrate with national e-health (ESPBI) and health insurance (TLK) systems.
  
• Participate in designing the new modular POS architecture.
  
• Work across 15+ interconnected services — POS, loyalty, e-shop, scheduled jobs, monitoring.
  
• Refactor and optimize existing solutions to improve performance and maintainability.
  
• Implement new features and enhancements across backend services and desktop application components.
  
• Integrate internal and external systems using SOAP and REST APIs.
  
• Contribute to code quality through code reviews, testing, and development best practices.

• 6+ years of programming experience with C# .NET and .NET Core.
  
• Owns production systems end-to-end — design, delivery, rollout, operations (Leads System).
  
• Sets quality standards for the team through exemplary code and practices; proactively reduces technical debt (Leads System).
  
• Makes architectural decisions for new features considering the broader system (Leads System).
  
• Defines testing strategy based on risk and value — appropriate mix of Unit, Integration, and E2E tests (Leads System).
  
• Deep SQL expertise: query optimization, execution plans, transaction management.
  
• Diagnoses production incidents, leads their resolution, improves observability (Leads System).
  
• Identifies legacy code blocking progress and creates improvement plans (Leads System).
  
• Experience with GIT strategies and fostering a code review culture in the team.
  
• Ability to independently lead solutions from requirements to production.
  
• Good English and Lithuanian language skills.
  

Additional Requirements:

• Experience developing WPF applications using the MVVM pattern.
  
• Knowledge of Agile/Scrum processes — contributes to estimation, planning, and retrospectives.
  
• Practical CI/CD experience — able to configure or improve pipelines.
  
• Strong English skills — able to communicate with stakeholders verbally and in writing.
  
• Seeks domain knowledge — connects technical tasks with user value (Understands Direction).
  
• Raises risks early to the team and stakeholders, communicates clearly in business terms (Takes Responsibility).
  
• Mentoring — supports less experienced developers and provides feedback (Takes Responsibility).
  
• Identifies recurring problem patterns and works to solve root causes (Challenges & Experiments).
  
• Experience with POS systems or similar domain solutions — a strong advantage.

5000-6000 €/mon. gross