Senior .NET Developer

Link Group; Polska; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

Link Group in Poland is seeking a senior .NET developer to lead enterprise applications and modernization efforts. You will migrate a legacy PHP system to Blazor using .NET 10 while maintaining ongoing support and enhancements.

You will design SQL Server databases, optimize queries, and collaborate with international teams. Strong English communication and autonomous work style are essential for success.

Qualifications

• Extensive commercial experience in .NET development with senior-level technical background.
• Practical knowledge of Blazor and current .NET technologies including .NET 8/9/10.
• Experience in legacy system modernization and technology transformation projects.
• Experience with PHP codebases, maintaining and extending existing applications.
• Strong expertise in Microsoft SQL Server: architecture, stored procedures, and performance tuning.
• Proven ability to build robust, scalable web applications and APIs.
• Good understanding of software design principles and application architecture.
• Proficiency with Git and collaborative code review processes.
• Ability to work autonomously and deliver technical solutions.
• Excellent communication skills and ability to work with international teams in English.

Responsibilities

• Develop, maintain, and improve enterprise-level applications built with .NET technologies.
• Drive the modernization of an existing PHP-based system by migrating it to Blazor using .NET 10.
• Provide ongoing support, maintenance, and enhancements for the legacy PHP application throughout the migration process.
• Design and manage SQL Server databases, develop stored procedures, and optimize queries for performance and efficiency.
• Work closely with business stakeholders and technical teams to define solutions and establish application architecture.
• Review code, share technical knowledge, and promote consistent coding standards and engineering practices.
• Ensure applications meet high standards of performance, security, stability, and scalability.
• Contribute to Agile/Scrum ceremonies and actively support continuous improvement across the development lifecycle.

Skills

NET development

Blazor

legacy modernization

PHP

SQL Server

APIs

design principles

Git

english communication

Job description

Responsibilities

• Develop, maintain, and improve enterprise-level applications built with .NET technologies.
• Drive the modernization of an existing PHP-based system by migrating it to Blazor using .NET 10.
• Provide ongoing support, maintenance, and enhancements for the legacy PHP application throughout the migration process.
• Design and manage SQL Server databases, develop stored procedures, and optimize queries for performance and efficiency.
• Work closely with business stakeholders and technical teams to define solutions and establish application architecture.
• Review code, share technical knowledge, and promote consistent coding standards and engineering practices.
• Ensure applications meet high standards of performance, security, stability, and scalability.
• Contribute to Agile/Scrum ceremonies and actively support continuous improvement across the development lifecycle.

Requirements

• Extensive commercial experience in .NET development, with a strong senior-level technical background.
• Practical knowledge of Blazor and current .NET technologies, preferably including .NET 8, .NET 9, or .NET 10.
• Demonstrated experience in legacy system modernization, application migration, or technology transformation projects.
• Experience working with PHP codebases, including maintaining and extending existing applications.
• Strong expertise in Microsoft SQL Server, covering database architecture, stored procedure development, and query performance tuning.
• Proven ability to build robust, scalable web applications and develop well-designed APIs.
• Good understanding of software design principles, application architecture, and industry-standard development practices.
• Proficiency with Git and experience working in collaborative source control and code review processes.
• Ability to work autonomously, make sound technical decisions, and take responsibility for delivering solutions.
• Excellent communication skills and the ability to work effectively with international teams in English.