Senior Software Engineer/Architect
About The Position
Our client, a leading fintech innovator serving banks and credit unions nationwide, is seeking a Senior Software Engineer / Architect to provide technical leadership across a modern, Microsoft-centric technology ecosystem. This is a high-impact opportunity to design and deliver secure, scalable identity and integration solutions that power digital banking experiences across the U.S. Position Overview Our client is looking for a highly experienced Senior Software Engineer / Architect to lead the design and implementation of secure identity, authentication, and integration solutions across a growing platform ecosystem. This is a hands-on engineering role with architectural ownership. The ideal candidate will drive Single Sign-On (SSO) integrations with digital banking platforms and third-party benefit providers while actively contributing to application development and delivery. This role requires deep expertise in modern .NET development, Azure cloud architecture, and enterprise identity frameworks within regulated environments.
Requirements
- 7+ years of software engineering experience with demonstrated architectural leadership
- Strong hands-on experience with: .NET Core / ASP.NET Core React Microsoft SQL Server Azure Cloud (App Services, Azure AD, Azure AD B2C, etc.)
- Deep expertise in: Auth 2.0 OpenID Connect SAML Single Sign-On (SSO) integrations Identity Provider (IdP) design and implementation Azure AD B2C Duende IdentityServer (successor to IdentityServer4)
- Experience building and securing APIs and microservices architectures
- Strong understanding of authentication flows, token issuance, claims-based identity, and federation
- Experience in financial services, fintech, or other regulated industries strongly preferred
Nice To Haves
- A senior-level engineer who combines architectural thinking with a passion for hands-on coding
- A leader comfortable owning identity strategy, security design, and execution
- A collaborative partner who can work effectively with banking platforms and fintech integration partners
- Strong communicator capable of explaining complex authentication and integration concepts clearly
- A pragmatic problem solver focused on security, performance, scalability, and maintainability
Responsibilities
- Lead architecture and hands-on development of secure, scalable, cloud-based software solutions
- Design and implement Single Sign-On (SSO) integrations with digital banking systems and third-party platforms
- Architect and support identity management solutions using OAuth 2.0, OpenID Connect, and SAML
- Design, implement, and maintain Identity Provider (IdP) capabilities
- Develop and manage authentication and token services leveraging Azure AD B2C and Duende IdentityServer
- Collaborate with product, engineering, and external integration partners to define secure integration patterns
- Guide architectural strategy for APIs, microservices, and new feature development
- Write clean, maintainable, production-ready code within a modern Microsoft technology stack
- Mentor engineering team members and elevate development best practices
- Ensure all solutions meet security, compliance, scalability, and performance requirements—particularly within financial services environments
Benefits
- Make a meaningful impact in the financial services and fintech industry
- Lead mission-critical identity and SSO integration initiatives
- Work within a modern Microsoft and Azure-based technology stack
- Collaborate with a forward-thinking team focused on innovation and growth
- Competitive compensation and comprehensive benefits package
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
