OneMain Financial

Senior Software Engineer – (C#, .NET)

OneMain Financial  •  United States (Onsite)  •  13 hours ago
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Job Description

Key Responsibilities

  • Contribute to the architecture and development of key systems including Loan Origination Systems, Loan Servicing Systems, and customer-facing applications (e.g., omfauto.com, foursight.com, rateworks.com).
  • Ensure scalable, maintainable, and secure software design within assigned projects.
  • Implement APIs, middleware services, and integrations with internal and external tools such as Twilio Flex.
  • Collaborate with peers through code reviews, design discussions, and pairing sessions.
  • Support automation and continuous integration strategies to improve development efficiency and reliability.
  • Assist in technical initiatives to modernize legacy systems and improve scalability.
  • Participate in troubleshooting and performance tuning to maintain system health.

What Sets You Apart

  • 3–5+ years of experience developing enterprise-grade applications in .NET.
  • Strong skills in T-SQL, C#, and the .NET Framework with experience in backend service design.
  • Understanding of distributed systems and multi-tier application architectures.
  • Hands-on experience with WPF/XAML, LINQ, MVVM, and WebAPI; exposure to React or Angular is a plus.
  • Proficiency in RESTful API design, JSON, and XML integrations.
  • Ability to explain technical concepts clearly across teams.
  • Experience working in Agile environments with DevOps practices.
  • Bachelor’s degree in Computer Science, Engineering, or related field.
  • Interest in mentoring peers and promoting modern development practices.

OneMain Holdings, Inc. is an Equal Employment Opportunity (EEO) employer. Qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship status, color, creed, culture, disability, ethnicity, gender, gender identity or expression, genetic information or history, marital status, military status, national origin, nationality, pregnancy, race, religion, sex, sexual orientation, socioeconomic status, transgender or on any other basis protected by law.

OneMain Financial

About OneMain Financial

OneMain Financial (NYSE: OMF) is the leader in offering nonprime customers responsible access to credit and is dedicated to improving the financial well-being of hardworking Americans. We look beyond credit scores to help people get the money they need today and reach their goals for tomorrow. Our growing suite of personal loans and auto loans, credit cards and financial wellness products like Trim and Credit Worthy by OneMain Financial® help people borrow better and work toward a brighter future.

In our 1,300+ branches and across the U.S., join almost 9,000 team members helping millions of customers solve critical financial needs, including debt consolidation, home and auto repairs, medical procedures, extending household budgets or something else people might need. Together, we meet customers where they want to be — in person, by phone and online.

Find your place in our Most Loved Workplace with a recognized focus on supporting Volunteerism, Diversity and Veterans. Every day, be part of our mission-driven culture committed to inclusion and respect, career growth and impacting the communities where we live and work. There’s never been a better time to shine with OneMain.

Loans offered by OneMain Financial Group, LLC (NMLS# 1339418 – nmlsconsumeraccess.org; onemainfinancial.com/legal/disclosures.

Industry
Finance & Insurance
Company Size
5,001-10,000 employees
Headquarters
Baltimore , MD
Year Founded
1912
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