Principal Software Engineer - .Net/C#

The Mirillion Group; Montreal (administrative region); On-site; CAD 120,000 - 180,000; Full time

Benefits offered by this job

Stock participation

Flexible benefits

Competitive base salary

Coaching and development

Job summary

The Mirillion Group is seeking a Principal .NET/C# Engineer to join a fast-moving team embedded within a global organization. You will own core automation pipelines, architect enterprise solutions, and deliver production-grade UI and services at scale.

You’ll collaborate with platform and product partners across Canada and beyond, shaping robust infrastructure, CI/CD processes, and high-quality software delivery. This role offers technical ownership and real impact on critical systems.

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, or related field.
• Advanced C#/.NET skills with production-grade code and UI development knowledge.
• 2+ years of experience building enterprise-scale solutions.
• Strong Linux fundamentals and hands-on experience with CI/CD tooling.
• Fluency with Agile/Scrum methodology.
• Analytical mindset with focus on precision in fast-paced environments.
• Excellent communication skills, both written and verbal.

Responsibilities

• Design and implement automation pipelines for building, testing, and delivering enterprise solutions, including UI (WPF).
• Collaborate with core engineers and platform teams to architect and deliver robust enterprise infrastructure.
• Drive DevOps maturity: CI/CD pipelines, code quality tooling, and release process improvements across the SDLC.
• Partner with distributed teams across Canada and globally to deliver high-impact solutions at enterprise scale.

Skills

Advanced C#/.NET

UI development (WPF)

DevOps / CI/CD

Linux fundamentals

Agile/Scrum

Analytical mindset

Excellent communication

Education

Bachelor's degree in Computer Science or Computer Engineering

Tools

CI/CD tooling

Git

Docker

Azure DevOps

Job description

Startup feel. Enterprise reach. UI and systems that people actually use.

The Opportunity

You'd be joining a specialized engineering team embedded within a large, globally operating organization — the kind of setup where you get the camaraderie and ownership of a tight-knit group, while the systems you build quietly underpin operations at a scale most engineers never get close to.

The team is close. People know each other, back each other, and take real pride in what they ship. There's no sprawling bureaucracy between you and the work — just focused engineers building robust enterprise tooling and polished interfaces that real users depend on every day.

We're looking for a Principal .NET/C# Engineer who's equally comfortable deep in the stack and crafting smooth, production-grade UIs. You'll be owning automation pipelines, building enterprise solutions, and raising the quality bar on a platform that operates at global scale.

What You'll Work On

• Design and implement automation pipelines for building, testing, and delivering enterprise solutions — including UI (WPF), messaging, data distribution, and collaboration tooling in C# and .NET


• Collaborate with core engineers, platform teams, and cross-functional stakeholders to architect and deliver robust enterprise infrastructure


• Drive DevOps maturity: CI/CD pipelines, code quality tooling, and release methodology improvements across the SDLC ecosystem


• Partner with distributed teams across Canada and globally to deliver high-impact solutions at enterprise scale

What We're Looking For

Must-haves:

• Bachelor's in Computer Science, Computer Engineering, or a related field


• Advanced C#/.NET skills — you write clean, maintainable, production-grade code and know the ecosystem deeply, including UI development best practices


• 2+ years of experience building enterprise-scale solutions


• Strong Linux fundamentals and hands-on experience with CI/CD tooling


• Fluency with Agile/Scrum methodology


• Analytical mindset — you thrive in fast-paced environments where precision matters


• Excellent communication skills (written and verbal)

Nice-to-haves:

• Experience building automation for complex, high-throughput enterprise infrastructure


• Familiarity with Java, C++, or Python

Why Join Us

• Close-knit team with a collaborative, no-ego environment — your ideas get heard and acted on


• Specialized team, broad reach — the infrastructure you build touches a global organization


• Competitive base, performance bonuses, flexible benefits, stock participation


• Leaders who invest in your development with coaching and real opportunities


• Work/life balance that actually works — flexible arrangements respected


• Real autonomy on meaningful problems — not tickets, but craft