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Middle .NET Developer

location-pointer-icon Warsaw, Krakow, Gdansk, Wroclaw, Posnan
B2B
.NET

You’ll be part of a dynamic, international team working on large-scale enterprise platforms for a leading U.S.-based client in the consulting and financial services sector. Our mission is to build impactful, high-tech solutions that streamline business operations, enhance efficiency, and drive digital transformation. 

We focus on solving real business challenges — developing robust platforms that support critical decision-making and operational excellence. Our projects span across continents, offering the opportunity to collaborate with top-tier professionals from around the world. Welcome to join a Global Team Driving Real-World Innovation. 

Requirements 

  • Strong expertise in .NET Core, ASP.NET Core 
  • Strong foundation in the object-oriented programming and design principles (OOP/OOD/SOLID/GOF) 
  • Solid understanding and practical experience with async programming, multithreading 
  • Web App lifecycle, security, error handling 
  • Intermediate English 

Nice-to-haves 

  • Experience with Azure (App Services, Functions, Storage, Service Bus, etc.)  
  • Proficiency in writing T-SQL queries for MS SQL Server 

Core Responsibilities 

  • Analyzing existing features 
  • Developing key features 
  • Taking part in the planning and implementation of requirements, refactoring, and optimization 

Expected qualifications 

  • Build and deliver complex features with confidence You take ownership of major parts of a project, building advanced features that meet both technical and business needs. 
  • Make smart technical decisions and contribute to design discussions You can design and implement solutions independently, and you help shape system architecture to support scalability and long-term goals. 
  • Support and mentor junior developers You share your experience with less-experienced teammates, offering guidance on code quality, design choices, and development best practices. 

What we offer   

  • Continuous learning and career growth opportunities 
  • Professional training and English/Spanish language classes   
  • Comprehensive medical insurance 
  • Mental health support 
  • Specialized benefits program with compensation for fitness activities, hobbies, pet care, and more 
  • Flexible working hours 
  • Inclusive and supportive culture 

About Trinetix

Established in 2011, Trinetix is a dynamic tech service provider supporting enterprise clients around the world. 

Headquartered in Nashville, Tennessee, we have a global team of over 1,000 professionals and delivery centers across Europe, the United States, and Argentina. We partner with leading global brands, delivering innovative digital solutions across Fintech, Professional Services, Logistics, Healthcare, and Agriculture. 

Our operations are driven by a strong business vision, a people-first culture, and a commitment to responsible growth. We actively give back to the community through various CSR activities and adhere to international principles for sustainable development and business ethics. 

To learn more about how we collect, process, and store your personal data, please review our Privacy Notice: https://www.trinetix.com/corporate-policies/privacy-notice 

Trinetix
Outsource
500 - 1000
Founded
2012

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