Senior Principal Engineer - .NET Modernization & AI

Solas IT Recruitment; Galway; On-site; EUR 90,000 - 110,000; Full time

Job summary

Solas IT Recruitment in Galway is seeking a hands-on Principal Engineer / Technical Lead to modernize a complex platform. You will spend the majority of your time coding while guiding architectural improvements and mentoring the engineering team.

The role requires 10+ years in commercial software, deep .NET Core and microservices experience, and strong leadership. You will work with TypeScript/React/Angular, AWS, CI/CD, and AI tooling to accelerate delivery and raise engineering productivity.

Qualifications

• 10+ years in commercial software engineering.
• Experience modernizing production systems.
• Strong leadership, mentoring and code-review skills.

Responsibilities

• Modernize legacy systems into scalable service-based architectures.
• Write high-quality code and promote best practices (testing, modular design, CI/CD).
• Integrate AI tooling into daily development workflows.
• Mentor engineers through reviews and pair programming; resolve critical issues.
• Plan incremental refactoring and drive productivity improvements.

Skills

.NET Core

Distributed Systems

Microservices

TypeScript

React

Angular

AWS

CI/CD

AI tooling

Job description

Solas IT Recruitment in Galway is seeking a hands-on Principal Engineer / Technical Lead to modernize a complex platform. You will spend the majority of your time coding while guiding architectural improvements and mentoring the engineering team.

The role requires 10+ years in commercial software, deep .NET Core and microservices experience, and strong leadership. You will work with TypeScript/React/Angular, AWS, CI/CD, and AI tooling to accelerate delivery and raise engineering productivity.