Senior Full-Stack Engineer: .NET & React for Business Apps

Spyrosoft Ltd; Wrocław; On-site; PLN 210,000 - 280,000; Full time

Job summary

Spyrosoft Ltd in Wrocław, Poland, is seeking a Senior Full-Stack Software Engineer to join a team delivering ERP and HR solutions. You will work across backend, frontend, and database layers using .NET, React, and SQL to evolve the product.

Experience with WinForms/WPF is a plus; involvement in Azure, CI/CD, and agile practices is valued. You will collaborate with Product Owners, designers, and engineers to deliver effective, scalable software.

Qualifications

• Minimum 5 years of commercial experience as a Software Engineer.
• Strong knowledge of C# and the .NET platform (.NET Framework, .NET Core).
• Strong experience with JavaScript, HTML, CSS, and React.
• Good knowledge of SQL and relational databases (SQL Server, Azure SQL).
• Experience with Microsoft Azure or other cloud solutions; Scrum/Agile environments; Git.
• Knowledge of software design patterns and testing (unit, integration, automated tests).
• English proficiency at a minimum B1/B2 level; Polish at least B2.

Responsibilities

• Develop and maintain full-stack applications using .NET and React.
• Build and enhance backend services, APIs, and web interfaces.
• Design and optimize SQL queries and database solutions.
• Take ownership of delivered solutions, from technical design through implementation and testing.
• Contribute to technical decisions and continuous improvement of the product.
• Write clean, maintainable, well-tested code.
• Collaborate with Product Owners, designers, and other engineers to translate business needs into technical solutions.
• Participate in code reviews and knowledge sharing within the team.

Skills

C#

.NET Platform

JavaScript

React

SQL

Azure

Git

Agile Scrum

English (B1/B2)

Polish (B2)

Tools

Azure DevOps

CI/CD

SQL Server

Entity Framework

REST APIs

Job description

Spyrosoft Ltd in Wrocław, Poland, is seeking a Senior Full-Stack Software Engineer to join a team delivering ERP and HR solutions. You will work across backend, frontend, and database layers using .NET, React, and SQL to evolve the product.

Experience with WinForms/WPF is a plus; involvement in Azure, CI/CD, and agile practices is valued. You will collaborate with Product Owners, designers, and engineers to deliver effective, scalable software.