Lead C# Engineer

Willis Towers Watson; United Kingdom; Hybrid; GBP 75,000 - 110,000; Full time

Benefits offered by this job

25 days annual leave

Private healthcare

Life insurance

Income protection

Health assessments

Pension (matched 10%)

Hybrid working

Employee assistance programme

Volunteer day

EV car scheme

Share scheme

Cycle-to-work

Dental cover

Optical cover

Critical illness protection

Job summary

Willis Towers Watson is seeking a Lead Software Engineer to join a skilled development team and deliver market-leading insurance pricing solutions. You will work with the Product Owner to refine the backlog, design software meeting requirements, and drive high-quality code across the full SDLC.

The role emphasizes maintainability, performance, and scalable architectures, with mentoring responsibilities and collaboration with test engineers to ensure robust test coverage.

Qualifications

• Proven experience with C# .NET in commercial/production environments.

Responsibilities

• Define, refine and deliver the product backlog with the Product Owner.
• Design and document software solutions meeting functional and non-functional requirements.
• Implement and refactor code with emphasis on maintainability and performance.
• Implement unit tests and test frameworks; develop automated test cases.
• Review and debug code; identify defects and performance bottlenecks.
• Coordinate with test engineers to ensure coverage; perform manual tests if needed.
• Participate in sprint planning, daily stand-ups and retrospectives; improve team velocity.
• Mentor junior team members and take a lead role in activities.

Skills

C# .NET

Full SDLC

OO design

SOLID principles

Agile & XP

Azure DevOps

Git

WPF/WinForms

Unit testing

Test automation

CI/CD

Design patterns

AI tools familiarity

Cloud technologies

Education

Degree in Computer Science, Engineering, Mathematics or relevant discipline

Tools

MS Test

IDE tools

Job description

Description

As a Lead Software Engineer, you will work as part of a highly-skilled and close-knit development team following Scrum methodologies to develop market-leading insurance pricing solutions. This is a varied and challenging opportunity where you will play a key role creating new product features and enhancing existing code, whilst ensuring the product continues to meet high levels of reliability, maintainability, usability and performance.

The Role:

• Working with the Product Owner to define, refine and deliver the product backlog
• Designing and documenting software solutions meeting functional and non-functional requirements
• Implementing and refactoring product code (C#), following best practices for maintainability, testability and performance
• Implementing unit tests, developing test frameworks and associated automated test cases
• Reviewing and debugging code to identify defects, performance bottlenecks or technical debt
• Working closely with test engineers to guarantee suitable test coverage, identifying and executing manual tests if necessary
• Participating in sprint planning meetings, daily stand-ups and sprint retrospectives, striving to continuously improve the team velocity, its processes and engineering practices
• Mentoring junior members of the team and taking a lead role for some of the above activities

Qualifications

What you’ll bring

The essential skills/experience for this position are:

• Proficient in software development using C# .NET

• Experience with the full software development lifecycle in a commercial/production environment: requirements capture and analysis, estimation, detailed software design, implementation, unit and system-level testing, installation and deployment, maintenance

• Experience with software engineering best practices: object-oriented design and implementation, design patterns, SOLID principles, Agile and Extreme Programming methodologies

• Experience with software development tools: IDE’s, version control, test automation, continuous integration, defect and backlog management systems

• Ability to coordinate day-to-day development and bug fixing activities
• Ability to design high-performance, scalable and extensible software architectures which are also easy to test, debug and maintain
• GUI design/implementation, knowledge of standards and frameworks such as WPF or WinForms
• Appreciation of current and emerging technologies along with their potential benefits and limitations
• Azure DevOps and Git
• Experience of unit and GUI test automation frameworks such as MS Test
• Azure and Cloud Technologies
• Passion for maths, statistics and complex algorithms
• General knowledge of the Insurance Industry
• Degree-educated with Computer Science, Engineering, Mathematics or relevant discipline

Other highly desirable, but not essential skills are:

Passion for leveraging AI-powered tools such as GitHub Copilot to accelerate development, improve code quality, and enhance productivity.

What we offer

Enjoy a benefits package designed to help you thrive, both professionally and personally. You'll receive 25 days of annual leave plus an extra WTW day to relax and recharge. Our comprehensive health and wellbeing offering includes private healthcare, life insurance, group income protection, and regular health assessments, all giving you peace of mind. Secure your future with our defined contribution pension scheme, featuring matched contributions up to 10% from the company.

We support your growth and balance with hybrid working options, access to an employee assistance programme, and a fully paid volunteer day to make a difference in your community. On top of these, you can opt into a variety of additional perks including an electric vehicle car scheme, share scheme, cycle-to-work programme, dental and optical cover, critical illness protection, and much more. Start making the most of your career and wellbeing with a range of benefits tailored for you.

Equal Opportunity Employer

We’re committed to equal employment opportunity and provide application, interview and workplace adjustments and accommodations to all applicants. If you foresee any barriers, from the application process through to joining WTW, please email [e-mail]

(ICT_TECH TD_2025_50R)