Senior Software Engineer (C++)

IRIS; Slough; On-site; GBP 70,000 - 100,000; Full time

Benefits offered by this job

Signal Iduna Medical Insurance

Annual bonus 2-3%

Annual leave 22 days

Eyeglasses Reimbursement

Learning and development programs

Job summary

IRIS Software Group in the UK seeks an experienced Software Engineer to join the Accountancy Solutions business unit. You will contribute to a cross-functional Agile team delivering Windows desktop and .NET applications built on C++, C#, and WPF.

The role emphasizes hands-on development, code reviews, and collaboration across teams, with a core SQL database. You should have 7+ years of experience and a systematic, analytical approach.

Qualifications

• Windows application software engineering with .Net and legacy Windows Forms work
• Proficient in C++ and C# development
• Strong knowledge of WPF and XAML, Visual Studio experience
• Experience with relational databases and SDLC processes

Responsibilities

• Implement user stories and fix issues in the backlog
• Contribute to backlog refinement and story estimation
• Translate requirements into code via best practices
• Develop and integrate software solutions across modules
• Participate in code reviews
• Unit test modules to meet client and business needs
• Collaborate in Agile environments to hit sprint and release goals

Skills

C++

C#

WPF

XAML

Visual Studio

Relational databases

Azure DevOps

Agile

Software lifecycle

Education

BSc or equivalent in software engineering

Job description

About IRIS

IRIS Software Group is one of the UK’s largest privately held software companies, trusted by 100,000+ businesses, schools and accountancy firms to keep their operations running. Our software pays 1 in 6 UK employees, supports over 12,000 schools, and is relied on by 91 of the top 100 UK accountancy firms.

We’re a Great Place to Work® certified employer, recognised for our commitment to well-being, inclusion and development - and we’re growing fast.

The Role

As a successful candidate you will be working in the IRIS Accountancy Solutions business unit. This part of IRIS produces software for UK Accountancy practices. You will be working as part of an Agile team to deliver solutions to user stories and requirements in an agile environment. The role is a challenging and dynamic one, with key deadlines to be hit. The role will require learning new skills and bringing a focused attitude to the tasks.

You will be involved in varied technical solutions, ranging from C and C++ through to the latest .NET technologies using C# and WPF.

These applications form part of an integrated suite, based around a core SQL database.

Your Main Responsibilities

• Implementing user stories and resolving issues in the team’s backlog

• Contribute to the team’s backlog, helping to refine and estimate stories.

• Translating technical requirements into application code using development best practices.

• Developing and integrating software solutions.

• Participating in reviews of own work and in reviews of the work of colleagues.

• Unit testing of modules developed or modified, ensuring the application meets the needs of clients and the business.

• Work collaboratively in an Agile environment, being proactive to work with others to deliver sprint and release goals.

Your Experience

• Windows application software engineering/programming skills with balance of .Net and legacy windows forms work

• Strong knowledge of C++ and C#

• Strong Knowledge of WPF and XAML

• Strong experience of Microsoft Visual Studio

• Strong experience of developing with relational databases

• Experience of Azure DevOps would be useful

• Experience of working in an Agile environment

• Experience of formal software development lifecycles would be useful

• Has a systematic, disciplined and analytical approach

• Keen to help others and collaborate with other teams

• BSc or equivalent in a software engineering discipline

• 7+ years of software development experience

Benefits

• Signal Iduna Medical Insurance

• Meal vouchers – 30 RON/working day – currently offered through Up Romania

• Annual bonus according to the company’s performance management system, between 2% - 3% out of your annual gross salary

• Annual leave – 22 days

• Giving back days – 3 days/year for charity + 1 Birthday off (if you complete the 3 days for charity)

• Eyeglasses Reimbursement - 300 RON/per year

• Events (team buildings, kickoffs, dinners)

• Learning and development programs using Cornerstone

• Access to Pluralsight for self-paced learning (first come, first served)

• Paid certifications

• eMAG vouchers as quarterly incentives for living the IRIS values

• Discounts programs with Lensa (free optometric consultations and discounts for eyewear) and Aerotravel (discounts for travel packages)

Why You’ll Love Working Here

• Impact: Your work will influence millions globally.

• Growth: Continuous learning and career development opportunities.

• Belonging: A culture that celebrates diversity and empowers every individual.

What to expect from our hiring process

Our process is designed to be fair, transparent and straightforward. Stages vary depending on the role — more senior positions may involve additional steps, and some areas include role-specific assessments such as a technical test or case study — but typically you can expect:

1. Application review — we assess your experience and potential

2. Initial call — a short conversation to learn about you and share more about the role

3. Skills assessment — tailored to the position, e.g. case study, coding challenge or portfolio review

4. Final interview — meet the team and explore how you’ll make an IMPACT at IRIS

We’ll always walk you through the specific stages at the start of the process so you can prepare with confidence.

If you need any adjustments or accommodations during the process, let us know, we’re committed to making this experience accessible for everyone.