Principal Software Engineer

MHR; Ruddington; On-site; GBP 100,000 - 140,000; Full time

Benefits offered by this job

Internal training courses and cross-de

GP access 24/7 for you and family

Additional holiday days beyond 25 days

Enhanced Family leave

MHRewards discounts

Referral bonus up to £2,000

On-site subsidised restaurants

Private medical insurance and dental

Job summary

Join MHR as a Principal Software Engineer, leading complex engineering challenges that shape our products and technical direction. You will operate across the organisation, defining strategy, influencing architecture and guiding delivery while remaining actively involved in solving complex engineering problems and supporting implementation of critical technical initiatives.

Drawing on experience with Microsoft technologies such as .NET and Azure, you’ll apply modern programming practices

Qualifications

• Extensive hands-on .NET engineering experience building complex enterprise applications.
• Experience operating at Principal, Staff or senior technical leadership level.
• Strong knowledge of Azure, cloud-native architecture and distributed systems.
• Experience shaping technical strategy and leading complex engineering initiatives.
• A strong advocate for AI-assisted engineering, TDD and modern development practices.
• Strong technical leadership, collaboration and stakeholder influencing skills.
• Experience mentoring engineers and raising technical standards.
• A passion for innovation, experimentation and continuous improvement.

Responsibilities

• Define technical strategy and scalable cloud architecture.
• Lead design and code reviews and champion AI across the SDLC.
• Mentor engineers and raise technical standards across products.
• Drive delivery of complex engineering initiatives and ensure quality.
• Influence architecture and steer engineering direction across the org.

Skills

.NET engineering

Azure cloud

Technical leadership

Mentoring

AI adoption

TDD

Distributed systems

Tools

Azure

.NET

Job description

Your Career

We’re building MHR into an AI-led SaaS business, with AI at the heart of our products and increasingly embedded in how we design, build, test and deliver software.

As we continue to grow, we’re looking for a Principal Software Engineer to help shape what comes next. Combining deep .NET and Azure expertise with technical leadership, you’ll influence architecture, engineering strategy and how we adopt AI across software development.

This is a hands-on Principal role where you’ll lead complex technical initiatives, champion cloud-native engineering, distributed systems and TDD, and help us use AI-assisted engineering to build better software, faster.

Your Team

You’ll work across cross-functional Agile teams, partnering with engineers, architects and stakeholders to solve complex technical challenges and build scalable, resilient SaaS products.

As a senior technical voice, you’ll mentor engineers, challenge established thinking and help create a culture where innovation, AI adoption and continuous improvement are part of how we work.

Your Impact

You’ll help define technical strategy, shape scalable cloud architecture and raise engineering standards across our products.

Staying close to the technology, you’ll contribute to critical solutions, lead design and code reviews and champion the use of AI across the software development lifecycle to improve quality, productivity and innovation.

You’ll play a key role in building the engineering capability and technology that supports MHR’s continued growth as an innovative, AI-led SaaS business.

What You’ll Bring To The Role And MHR

• Extensive hands-on .NET engineering experience building complex enterprise applications
• Experience operating at Principal, Staff or senior technical leadership level
• Strong knowledge of Azure, cloud-native architecture and distributed systems
• Experience shaping technical strategy and leading complex engineering initiatives
• A strong advocate for AI-assisted engineering, TDD and modern development practices
• Strong technical leadership, collaboration and stakeholder influencing skills
• Experience mentoring engineers and raising technical standards
• A passion for innovation, experimentation and continuous improvement

About MHR

At MHR, our employees are central to our success and play a key role in helping customers achieve sustainable high performance. With a team of over 900 professionals, we work to make things flow smoothly, whether it’s for large organisations or individual employees. As businesses face rapid changes in the world of work, our team is here to help them adapt and thrive.

By focusing on the core needs of efficiency, productivity, growth, and impact, our employees use their expertise to deliver real solutions through our People and Finance platform. This system, which covers finance, HR, payroll, and learning, helps businesses run more smoothly and make better decisions in real time.

With over 40 years of experience behind us, MHR’s track record as a high-performance organisation is built on clear goals, a shared vision, and strong communication - all of which we pass on to our customers.

MHR is more than just a place to work; it’s a platform for empowerment. Joining us means bringing innovation, technology, and teamwork seamlessly removes obstacles, enhances your skills, and allow you to focus on what’s most important to you- work that matters.

With us, you’ll grow, find your flow, and make a lasting difference in your career, your team, and your impact.

Your Career

Join MHR as a Principal Software Engineer, leading complex engineering challenges that shape our products and technical direction. You will operate across the organisation, defining strategy, influencing architecture and guiding delivery while remaining actively involved in solving complex engineering problems and supporting implementation of critical technical initiatives.

Drawing on experience with Microsoft technologies such as .NET and Azure, you’ll apply modern programming practices including cloud-native design, distributed systems, and test-driven development.

You will also champion AI-assisted development to improve engineering efficiency, quality, and innovation. This is a high-impact position combining hands-on software engineering with technical leadership and mentoring. While you'll shape strategy and architecture, you'll also remain close to the code, leading the delivery of complex solutions, validating technical approaches and setting engineering standards through practical contribution.

Benefits to support you personally and professionally

Alongside the opportunity to work with an incredible team and express your individuality, we offer a range of personalised benefits including:

• Access to over 60 internal training courses, professional qualifications, and cross-departmental mentoring and coaching programs
• 24/7 access to a GP through Help at Hand for you and your family, confidential mental health support, and paid sick leave
• Ability to purchase or sell additional holiday days beyond 25 days and bank holidays
• Enhanced Family leave
• My MHRewards offering discounts at over 900 retailers
• Monthly employee recognition program and departmental awards
• Referral bonus scheme of up to £2,000
• Employee-led social events such as running clubs, football teams, book clubs, and bake-offs
• On-site subsidised restaurants offering a variety of fresh meals daily
• Opt-in benefits schemes such as private medical insurance and dental coverage

We value the well-being, financial stability, and inclusivity of our employees, and strive to provide a supportive working environment.

At MHR, we’re completely committed to creating a supportive and inclusive workplace where all voices are heard, and everyone feels valued and supported.

Whatever your background, abilities and experiences, if you’re excited by this role we want to hear from you. If you require assistance for an interview, please let us know and we’ll make sure your needs are met when you arrive.

If we receive an exceptionally high volume of applications, we reserve the right to close this vacancy earlier than originally advertised.