Senior .NET Engineer & AI-Driven Code Leader

Solid; Warszawa; Hybrid; PLN 200,000 - 280,000; Full time

Job summary

Solid, an international technology consulting company, seeks a senior .NET developer in Warsaw to join an operations and facilities management platform project. You will develop features, fix bugs, and help shape the software architecture.

You will mentor other engineers, participate in all SDLC phases, and collaborate with distributed teams on global support and deployments, while training the Product Management Team on new releases.

Qualifications

• 7+ years of experience in .NET development including designing software solutions
• Strong expertise in C#, .NET Core 6/7/8, ASP.NET MVC, and Blazor (Server/WebAssembly)
• Solid front-end skills in HTML5, CSS3, JavaScript, Bootstrap; jQuery
• Experience with SQL Server and T-SQL including views, procedures, functions, and optimization
• Experience with BI dashboards, reporting, and ETL processes; SSRS is a plus
• Understanding of OOP, design patterns, and lifecycle management
• Experience with REST, SOAP, WCF, and SOA
• Proficiency with Visual Studio, Azure DevOps, Git, CI/CD, and deployment processes
• Hands-on use of AI tools for coding and testing (Claude Code, Cursor, GitHub Copilot)
• Excellent written and verbal communication with distributed teams
• English level: Upper-Intermediate+

Responsibilities

• Develop features and fix bugs across a range of .NET technologies and applications.
• Provide technical leadership and mentoring to software developers, engineers and interns.
• Design and create next generation telecom application software and sustainment of existing software.
• Participate in all phases of the software development process.
• Work with a distributed international team on global support and implementation activities.
• Collaborate with Product Management for training, product briefs, and deployment of new installations.
• Lead by example on AI-assisted development, integrate tools like Claude Code, Cursor, or GitHub Copilot into daily coding, code review, and debugging.

Skills

.NET development

C# / .NET Core

ASP.NET MVC / Blazor

SQL Server / T-SQL

REST / SOAP / WCF

CI/CD / Azure DevOps

AI-assisted development tools

HTML5 / CSS3 / JavaScript

Git / source control

Team mentoring

Tools

Visual Studio

Job description

Solid, an international technology consulting company, seeks a senior .NET developer in Warsaw to join an operations and facilities management platform project. You will develop features, fix bugs, and help shape the software architecture.

You will mentor other engineers, participate in all SDLC phases, and collaborate with distributed teams on global support and deployments, while training the Product Management Team on new releases.