Senior Full-Stack Engineer: Node.js, React & .NET

Harvey Nash Poland; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

Harvey Nash Poland is seeking an experienced Senior Full-Stack Developer to design, build, and maintain scalable applications in Warsaw. You will work across server-side (Node.js, C#/.NET) and client-side (React, Angular) to deliver robust, production-ready software.

The role emphasizes architecture, quality, and collaboration with cross-functional teams to drive reliable solutions. A strong track record in full-stack development and modern practices is essential.

Qualifications

• 7+ years of professional experience in full-stack software development.
• Hands-on experience with Node.js, React, C#/.NET, ASP.NET, and SQL/T-SQL.
• Experience developing and supporting production-grade full-stack applications.
• Strong understanding of software architecture and scalable design practices.
• Attention to detail and focus on quality, reliability, and maintainability.
• Excellent communication and collaboration skills.

Responsibilities

• Design, develop, and maintain server-side applications with Node.js and C#/.NET.
• Build responsive front-end apps using React and Angular.
• Develop, optimise, and maintain SQL Server databases and T-SQL stored procedures.
• Utilise cloud, streaming, and container technologies to build scalable services.
• Contribute to architecture discussions and design reviews.
• Collaborate with engineering and cross-functional teams to deliver high-quality solutions.

Skills

Full-stack development

Node.js

React

C#/.NET

ASP.NET

SQL/T-SQL

Software architecture

Communication

Tools

SQL Server

Cloud platforms (AWS/Azure)

Job description

Harvey Nash Poland is seeking an experienced Senior Full-Stack Developer to design, build, and maintain scalable applications in Warsaw. You will work across server-side (Node.js, C#/.NET) and client-side (React, Angular) to deliver robust, production-ready software.

The role emphasizes architecture, quality, and collaboration with cross-functional teams to drive reliable solutions. A strong track record in full-stack development and modern practices is essential.