Senior Developer, Strategy & Technology Group

Posting Description

Senior Web Developer

Are you looking for a role where you can own architecture and not just tickets?

Do you want to build mission‑critical modelling software used by leading insurers?

This is a hybrid role with the flexibility to work both virtually and from our London office.

Aon is in the business of better decisions

At Aon, we shape decisions for the better to protect and enrich the lives of people around the world.

As an organization, we are united through trust as one inclusive team and we are passionate about helping our colleagues and clients succeed.

Your days will be varied but will likely include:

• Working on developing our product by writing code, testing, debugging, analysing, reviewing and all other aspects of the software development lifecycle
• Working with other developers, actuaries, devops and other teams to ensure successful delivery of software
• Providing support to both internal and external stakeholders
• Supporting and potentially leading product deployments
• Contributing to architecture, process and quality improvement discussions
• Engaging in ongoing professional development

This role is a fantastic opportunity to work with modern technology, including .NET 10, to shape the next generation of our product. You’ll join a tight‑knit, highly collaborative team where your ideas are heard and you have real ownership from day one.

• Strong communication – both technical and non‑technical
• Problem solving – digging into the why
• Adaptability – open to new tech as the stack evolves
• NET Backend web development
• SQL Server / Azure SQL
• Unit testing, e.g. xUnit
• Security & authentication

• Experience leading or guiding junior colleagues
• Containerised application development
• Cloud (Azure or equivalent)
• Scalable deployment experience
• Modern UI web framework experience (Angular or equivalent)
• Distributed message queue
• System / E2E testing