Senior Software Engineer — .NET & React

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 worlds 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 24000 partners we serve the worlds most sophisticated clients using leading technology and exceptional service.

Role - Senior Software & 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

• Design build and support RESTful APIs and backend services with .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

• Develop modern responsive interfaces with React and TypeScript
• 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

• Apply CI/CD best practices with tools such as GitHub Actions / Azure DevOps
• Champion test-driven development and automated testing
• Contribute to code reviews mentoring and knowledge sharing
• Work with DevOps 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# / Core
• Proven experience building micro-frontends (MFEs) with React and TypeScript
• 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 as Scrum or Kanban

Preferred Qualifications

• Experience in financial services or another highly regulated industry
• Knowledge of performance tuning high-volume transaction processing and distributed systems

Professional Capabilities

• Strong analytical and problem-solving abilities
• Clear structured communication
• Ability to collaborate effectively with senior stakeholders and cross-functional teams
• A proactive approach with strong ownership and accountability

Technical Leadership:

The successful candidate will demonstrate strong technology leadership shaping solution design and improving engineering practices across teams:

• Advance modern engineering practices including API-first design cloud-native patterns automation and technical debt reduction
• Guide and mentor engineers to strengthen capabilities and promote consistent practices across teams
• Identify technology risks scalability issues and non-functional gaps early then drive practical solutions
• Balance immediate delivery needs with long-term platform health maintainability and operational resilience

Alignment with Northern Trust Principles:

Successful candidates are expected to reflect Northern Trusts core principles and values in everyday engineering decisions and practices:

• Service & Integrity First Develop software responsibly with security accountability client trust and data protection at the forefront.
• Strength in Collaboration Partner across engineering architecture product operations and risk to deliver sustainable well-designed solutions.
• Expertise & Continuous Improvement Apply deep technical expertise while continually improving systems through modernization automation and proven engineering practices.
• Ownership & Accountability Own solutions end to end from design through production support with consistent attention to reliability and quality.
• Risk & Controls Mindset Build solutions that satisfy regulatory compliance and audit requirements through appropriate controls logging and documentation.
• Client-Focused Engineering Make technology choices that support scalability resilience and lasting client outcomes rather than only short-term delivery.

Education and Experience:

• Bachelors or Masters degree in Computer Science Engineering or a related field or equivalent practical experience

Salary Range:

Salary range is a good faith estimate of base pay. Northern Trust provides a comprehensive benefits package including retirement benefits (401k and pension) health and welfare benefits (medical dental vision spending accounts and disability) paid time off parental and caregiver leave life & accident insurance and other voluntary and well-being benefits. Northern Trust also provides a discretionary bonus program that may include an equity component.

Work Authorization

Applicants must be authorized to work in the U.S. without the need for employment-based visa sponsorship now or in the future. Northern Trust will not sponsor applicants for U.S. work visa status for this opportunity (no sponsorship is available for H-1B L-1 TN O-1 E-3 H-1B1 F-1 J-1 OPT CPT or any other employment-based visa).

Working with Us

As a Northern Trust partner you will be part of a flexible and collaborative work culture which has a strong history of financial strength and stability. Movement within the organization is encouraged senior leaders are accessible and you can take pride in working for a company committed to an inclusive workplace and assisting the communities we serve.

Philanthropy is deeply rooted in Northern Trusts history and is an essential element of our culture. Employees around the world give their time and talent to work for the greater good of their communities.

Reasonable Accommodation

Northern Trust is committed to working with and providing adjustments to individuals with health conditions and disabilities. If you need a reasonable accommodation for any part of the employment process please email our HR Service Center at or alternatively you can discuss your individual requirements with the recruiter you are working with.