Senior .Net Developer

Vistex LODZ 2026-09-07

3-8 years:

Experience with C#, .NET Core, and ASP.NET Core
Practical experience developing RESTful APIs and backend services
Good understanding of OOP principles, SOLID practices, and clean/layered architecture
Practical experience with relational and/or NoSQL databases
Experience using ORM and writing efficient SQL queries
Experience with testing frameworks (NUnit preferred) and API testing tools
Working knowledge of microservices architecture and containerization (e.g., Docker)
Working knowledge of deploying and supporting applications in cloud environments (Azure or AWS)
Proficiency with Git and CI/CD pipelines
Experience working in Agile/Scrum environments
Excellent command of English, both written and spoken

Education
Bachelors or better in Information Technology or related field

Preferred

Experience with AI Frameworks (e.g., LangChain, LangGraph, Semantic Kernel)
Knowledge of Agentic Workflows, including multi-agent systems and recursive planning
A background in advanced Prompt Engineering, specifically versioning and optimization tools


Vistex is a global enterprise software and services company that helps businesses take control of their mission-critical processes. With a multitude of programs covering pricing, trade, royalties and incentives, it can be complicated to see where all the money is flowing, let alone how much difference it makes to the topline and the bottom line. With Vistex, business stakeholders can see the numbers, see what really works, and see what to do next – so they can make sure every dollar spent or earned is really driving growth, and not just additional costs. The world’s leading enterprises across a spectrum of industries rely on Vistex every day to propel their businesses.

Vistex is growing and we are looking for .NET Developers that are motivated individuals who are eager to learn and combine the art of design with the art of programming. This individual will be key contributors to numerous projects and development of cutting-edge technology and experiences for our clients.


Currently, we’re looking to expand our team in Łódź with a new colleague who brings over 3 years of experience working with C#, .NET Core, ASP.NET Core and is open to work on-site at least 1 day per week.

About us: The Vistex platform helps businesses finally get control of all their different promotions, rebates, SPAs, discounts, and other incentives. With so many programs across so many partner relationships, it can be impossible to see where all the money is going, let alone how much difference it’s actually making to revenue. With Vistex, business leaders can see the numbers, see what really works, and see what to do next – so they can make sure every dollar they spend really is driving more growth, not just more costs. It’s why global enterprises ranging from Coca-Cola to Sony to Grainger rely on Vistex every day. Vistex | Now it all adds up. ™

,[creating modular, easy-to-maintain, reusable components for use in a complex application ecosystem, work on a coherent product portfolio (user application, advanced configuration editor, own chart library), maintaining existing applications by debugging and refactoring the code, implementation of processing modules and visual data presentation, participation in systematic scrum meetings and quality assurance processes, adaptation to a dynamically changing environment, daily communication in English, product creation and real impact on its final effect] Requirements: C#, .NET, .NET CORE, ASP.NET Core, RESTful API, Backend, OOP, SOLID, NoSQL, ORM, API testing, Microservices architecture, Docker, Azure, AWS, Git, CI/CD Pipelines, AI, LangChain, LangGraph, Semantic Kernel, Agentic workflows Tools: . Additionally: Modern technologies, Sport subscription, Training budget, Private healthcare, Flat structure, Small teams, International projects.