Principal .NET Developer

MRJ Recruitment; Manchester; On-site; GBP 72,000 - 88,000; Full time

Benefits offered by this job

Bonus scheme

Learning & development budget

Tech-focused culture

Job summary

A leading recruitment agency is searching for a Principal Back-End Developer to lead a high-growth SaaS team in Manchester. You will define technical direction, mentor team members, and build high-performance applications. The ideal candidate has proven expertise in C#, .NET Core, Azure, and strong TDD practices. Join a collaborative, tech-focused culture where you can make a significant impact.

Qualifications

• Proven expertise in C#, .NET Core, and cloud platforms such as Azure.
• Strong understanding of TDD, CI/CD, and building scalable systems.
• Excellent interpersonal skills — whether mentoring, pair programming, or leading discussions.

Responsibilities

• Define and drive the technical direction across multiple products.
• Build scalable, high-performance applications using .NET Core, Azure, and modern engineering practices.
• Mentor engineers and elevate team capabilities through guidance and support.

Skills

C#

.NET Core

Azure

TDD

CI/CD

Job description

Overview

This range is provided by MRJ Recruitment. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Direct message the job poster from MRJ Recruitment

Principal Back-End Developer – Lead, Build & Shape a High-Growth SaaS Platform

Up to £80,000 | C#, .NET, Azure, TDD | Manchester HQ

Bonus scheme | Learning & development budget | Tech-focused culture

We’re working with a fast-growing, award-winning SaaS company that’s creating products loved by businesses across the UK. As the business scales, they’re seeking a Principal Back-End Developer to play a key role in shaping both the technology and the engineering culture.

Here, technology isn’t just a support function, it’s the product itself. You’ll be part of a collaborative, cross-functional team that thrives on brainstorming, hands-on coding, bold ideas, and continuous improvement.

If you enjoy leading by example, designing architectures, mentoring colleagues, and staying close to the code, this could be the role you’ve been looking for.

What You’ll Be Doing:

• Define and drive the technical direction across multiple products
• Build scalable, high-performance applications using .NET Core, Azure, and modern engineering practices
• Mentor engineers and elevate team capabilities through guidance and support
• Work closely with Product, QA, Design, and Delivery teams — your input will influence key decisions
• Promote high-quality software through TDD, CI/CD, and a culture of continuous improvement

What You’ll Bring:

• Proven expertise in C#, .NET Core, and cloud platforms such as Azure
• Strong understanding of TDD, CI/CD, and building scalable systems
• Strategic thinking with the ability to make informed, practical technical decisions
• Excellent interpersonal skills — whether mentoring, pair programming, or leading discussions

Why This Role?

• Take ownership of a growing engineering team and influence the company’s future direction
• Work in a collaborative environment where the best ideas come from team discussion
• Join a tech-first company where engineering drives the business forward
• Thrive in a culture that encourages learning and supports experimentation
• Be part of a people-focused organisation with a 4.8 Trustpilot rating and a genuinely enjoyable culture

This is your chance to lead from the front, stay hands-on with code, and shape the future of a high-growth SaaS business.

Ready to make an impact? Apply today or get in touch to find out more.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Engineering and Information Technology
• Industries IT System Custom Software Development