Principal Software Engineer - Architecture & Performance Leader

IT Search; Ireland; On-site; EUR 90,000 - 130,000; Full time

Job summary

IT Search is seeking a Principal Software Engineer to shape the technical direction of a mature, business-critical software platform. This hands-on role focuses on architecture, complex problem-solving and performance optimisation, with mentoring of developers and influence over key technical decisions.

You will apply strong C#/.NET skills, lead architectural initiatives, and explore AI tools to enhance development workflows and engineering practices in a collaborative, established software

Qualifications

• Extensive experience with C#, .NET Framework and/or .NET Core.
• Strong knowledge of software architecture, design patterns and scalable, maintainable enterprise applications.
• Advanced SQL Server experience within database-driven systems.
• Expertise in performance profiling, debugging, optimisation and resolving complex technical challenges.
• Experience developing across desktop and web applications within established software products.
• Proven ability to influence architectural decisions, lead complex development initiatives and mentor engineers.
• Interest in AI tools and emerging technologies, with experience applying them to improve development workflows or engineering practices.

Responsibilities

• Shape the technical direction of a mature, business‑critical software platform.
• Influence architectural decisions and drive improvements across the platform.
• Mentor developers and lead complex development initiatives.
• Maintain a hands-on approach focusing on performance optimisation.
• Evaluate and apply AI tools to improve workflows and engineering practices.

Skills

C#

.NET Framework/.NET Core

Software architecture

SQL Server

Performance profiling

Debugging

Desktop & Web apps

Technical leadership

Mentoring engineers

AI tools interest

Tools

DevExpress

WinForms

Redis

MongoDB

Azure DevOps

Job description

IT Search is seeking a Principal Software Engineer to shape the technical direction of a mature, business-critical software platform. This hands-on role focuses on architecture, complex problem-solving and performance optimisation, with mentoring of developers and influence over key technical decisions.

You will apply strong C#/.NET skills, lead architectural initiatives, and explore AI tools to enhance development workflows and engineering practices in a collaborative, established software