Senior Developer / Technical Lead

Senior Developer / Technical Lead Are you ready to lead in the development of cutting-edge solutions which drive the growth of Aon’s Health business? Do you have experience solving complex challenges utilising Microsoft technologies such as C# .NET? If yes, please read on! 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, diverse team, and we are passionate about helping our colleagues and clients succeed. What the day will look like Create solutions and mentor development resources through the implementation lifecycle. Support continuous development of best practices within the team. Own the technical decisions of the implementation but invite input through a collaborative and team-based approach. Stay abreast with technology trends, organizational decisions, standards and solution designs of other domains to provide effective decision making. Design or develop proof-of-concept solutions to validate a technical approach or a technology. Validate the business briefs during discovery and/or pre-inception phases of a project. Assess architecture risks, project/product fit into the overall landscape and strategy, as well as size level of effort to ensure informed decision making. Understand existing enterprise assets, such as frameworks, patterns and subsystems, and ensuring that the teams use them where appropriate. Key Stakeholder Interactions Create appropriate technical solutions within the domain by partnering with the business owners and other development team members. Partner with a technical architect to align solutions to the strategic direction of the platform. Collaborate, influence and provide leadership in all aspects of software development. How this opportunity is different As a Senior Developer - Health, you will shape the future of our client relationships while driving innovation within a leading global firm. We're seeking a Senior Developer to own technical decisions, collaborate with key stakeholders, and drive innovation across our projects. In this role, you'll design secure, high-performance applications, evaluate third-party vendors, and ensure alignment with strategic goals. If you're passionate about architecture, thrive under pressure, and excel at collaborating across all levels, this is the perfect opportunity to make a significant impact. Skills and experience that will lead to success Collaborator at all levels (Exec, leadership team, tech leaders, development teams) Knowledgeable of architecture and design patterns Experience of developing large scale multi-tier applications with a mixture of modern and legacy technologies. Handling globalization, multi-language, multi-region support Curious and motivated to become an expert on existing bespoke platforms Demonstrated ability to quickly learn new technologies Focus on good architecture practices Performance tuning, code and data layer Application Security Excellent communicator Creative problem-solver Able to juggle multiple conflicting priorities Primary Technology C# .NET Framework 4+ and .NET Core Building secure and performant Web APIs Building nuget libraries / managing dependencies Mitigating security issues EF6 and EF Core+ SQL Server Good DB design Writing stored procedures Angular Angular (modern 9+ experience) Handling Web APIs RxJs patterns Creating dynamic components (ComponentFactory) Building npm libraries Typescript best practices Useful Technology AngularJS Familiar with Bootstrap KendoUI knowledge GIT branch management GIT merging strategies GIT filter-repo ADO Support with CI/CD pipelines ADO Using artifact feeds Azure How we support our colleagues In addition to our comprehensive benefits package, we encourage a diverse workforce. Plus, our agile, inclusive 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, but we also recognise that flexibility goes beyond just the place of work... and we are all for it. We call this Smart Working! 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, diverse 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 welcome applications from all and provide individuals with disabilities with reasonable adjustments to participate in the job application, interview process and to perform essential job functions once onboard. If you would like to learn more about the reasonable accommodations we provide, email

ReasonableAccommodations@Aon.com #LI-JK1 #LI-HYBRID

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