Senior Application Developer

Senior Application Developer

We are looking for a motivated and energetic Senior Application Developer to join our team. The ideal candidate is a team player who is eager to learn new skills both on and off the job. You will work alongside a team of experienced actuarial analysts, developers, and business resources to build and maintain internal and external-facing web applications.

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.

What the day will look like

• Develop full stack web applications across the technology stack (Front end, web APIs, and database).
• Design, mock-up, and implement web application prototypes.
• Collaborate with data scientists, analysts, developers, and business experts to build high-performing web applications.
• Assist in the support and enhancement of existing applications as needed.

How this opportunity is different

Aon's extensive range of product offerings and global reach provide us with unparalleled access to data and information. This unique position allows us to innovate and create differentiating solutions for our clients. The Aon Centre for Innovation and Analytics (ACIA) is at the forefront of these efforts, investing heavily in global coordination and innovation.

Skills and experience that will lead to success

• Experience with agile development processes (e.g., Scrum, Kanban, Scrumban).
• At least 3 years of experience in single-page web application development using Angular (Not AngularJS), JavaScript/Typescript, and CSS.
• At least 3 years of experience in .NET 6+, C#, and ASP.NET Core Web API.
• Experience with Entity Framework ORM, SQL, and developing applications against relational database systems (e.g., MSSQL, PostgreSQL).
• Understanding of clean coding principles and design patterns.
• Ability to design and develop applications with performance considerations.
• Knowledge of UI/UX principles and an aesthetic sense for front-end web application design.
• Independent, proactive, and eager to learn new skills.

Nice to haves:

• Possesses a computer science/software engineer or related degree
• Experience with JavaScript visualization libraries , Highcharts, SVGs)
• Experience with web components using StencilJS or Lit-Element
• Experience with modern data platforms such as Databricks/Fabric
• Experience with development of serverless applications and containerized applications on AWS/Azure

How we support our colleagues

In addition to our comprehensive benefits package, we encourage an inclusive workforce. Plus, our agile environment allows you to manage your wellbeing and work/life balance, ensuring you can be your best self at Aon. Furthermore, all colleagues enjoy two "Global Wellbeing Days" each year, encouraging you to take time to focus on yourself.  We offer a variety of working style solutions for our colleagues as well. 

Our continuous learning culture inspires and equips you to learn, share and grow, helping you achieve your fullest potential. As a result, at Aon, you are more connected, more relevant, and more valued.

Aon values an innovative and inclusive workplace where all colleagues feel empowered to be their authentic selves. Aon is proud to be an equal opportunity workplace.

Aon provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, creed, sex, sexual orientation, gender identity, national origin, age, disability, veteran, marital, domestic partner status, or other legally protected status. 

We are committed to providing equal employment opportunities and fostering an inclusive workplace. If you require accommodations during the application or interview process, please let us know. You can request accommodations by emailing us at or your recruiter. We will work with you to meet your needs and ensure a fair and equitable experience.

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