Senior Software Engineer — .NET & React

## Senior Software Engineer — .NET & React Apply:
Hybrid:
Chicago, IL:
Full time:
Posted Yesterday:
R162841
** About Northern Trust
** As a global leader in innovative wealth management, asset servicing, asset management and banking services, Northern Trust (Nasdaq: NTRS) is proud to guide the world’s most successful individuals, families, corporations and institutions.  Since 1889, we have aligned our efforts with our three guiding Principles That Endure:
Service, Expertise, and Integrity. Together, they reflect the three cornerstones of business conduct which we strive to instill in our employees, whom we call partners, and to provide to our clients and the communities we serve worldwide.  With more than 135 years of financial experience and over 24,000 partners, we serve the world’s most sophisticated clients using leading technology and exceptional service.

** Role - Senior Software Engineer — .NET & React
** We are looking for an accomplished
** Senior Software Engineer
** to design, develop, and modernize scalable enterprise applications. The role centers on API-first, cloud-native solutions built with **.NET (C#)
** for backend services and
** React
* * for frontend experiences, with a strong focus on security, performance, maintainability, and sound engineering practices.

You will partner with architects, product owners, and cross-functional teams to deliver reliable software that meets enterprise standards and regulatory obligations.  
** Primary Responsibilities**###
** Backend (.NET)
*** Design, build, and support RESTful APIs and backend services with **.NET / ASP.NET Core (C#)
*** Use clean architecture practices, including
** SOLID**,
** DDD**, and
** CQRS
* * where they add value
* Implement effective data access with
** Entity Framework Core
** or comparable tools, minimizing unnecessary reliance on stored procedures
* Build systems that are secure, resilient, auditable, and observable
* Help shape architecture decisions and produce clear technical design documentation###
** Frontend (React)
*** Develop modern, responsive interfaces with
** React
* * and
** Type Script
* ** Create reusable component libraries that follow UI/UX and accessibility standards
* Integrate APIs securely and efficiently, including authentication, authorization, and error handling
* Improve frontend performance and the overall user experience
* Develop unit and integration tests for frontend components###
** Engineering & Delivery
*** Apply CI/CD best practices with tools such as
** Git Hub Actions / Azure Dev Ops
*** Champion test-driven development and automated testing
* Contribute to code reviews, mentoring, and knowledge sharing
* Work with Dev Ops, QA, and platform teams to enable reliable deployments
* Support production systems and assist with incident resolution when required  
*
* Required Qualifications:

**** Essential Technical Skills
*** At least
** 4 years
** of professional software engineering experience
* Strong proficiency in
** C# and .NET / ASP.NET Core
*** Proven experience building micro-frontends (MFEs) with
** React
* * and
** Type Script
* ** Strong knowledge of
** REST APIs**, HTTP fundamentals, and API security
* Experience with relational databases such as
** SQL Server
*** Experience with cloud platforms, preferably
** Azure**, and containerization with Docker preferred.
* Hands on experience with Agentic AI SDLC with spec-driven development a plus
** Engineering Practices
*** Strong command of
** object-oriented design**, clean code, and refactoring
* Hands-on experience with
** unit testing**,
** integration testing**, and mocking frameworks
* Familiarity with event-driven and microservices architectures;
Kafka or other messaging technologies are a plus
* Experience working in agile delivery environments such…