Remote Senior Backend Developer

SIENN Poland is a company that values innovation, teamwork, and continuous learning. The role involves working with experienced professionals on meaningful projects in a supportive international environment.

• Advanced experience with MS SQL Server (T-SQL), including stored procedures, functions, and error handling
• Strong background in .NET backend development
• Proficiency in C#
• Hands-on experience with the Azure environment
• Familiarity with Azure DevOps
• Ability to write clean, maintainable, and well-documented code
• Understanding of deployment processes and release pipelines
• Openness to and experience with AI-assisted development tools
• Strong problem-solving skills and attention to detail
• Proficiency in English (spoken and written)
• Proactive and self-driven mindset

Nice to have:

• Experience with Supabase (PostgreSQL)

• Drive backend project ownership
• Deliver second-level support
• Actively promote continuous improvements across systems, processes, and code quality
• Manage both legacy and modern projects
• Work independently within a small team environment

• B2B rate: up to 140 PLN/h
• Work in an international project environment
• Access to international training and certifications (e.g. Microsoft MCP)
• Opportunities for professional development and knowledge sharing
• Possibility to access optional benefit platforms (medical care, sports card, insurance, language courses)
• Collaborative and supportive project environment
• Sport Subscription
• Training budget
• International environment
• Language courses
• Knowledge sharing
• Life insurance
• Private healthcare
• Free coffee
• Modern office
• Bike parking
• Free parking
• No dress code
• Free snacks