Senior C# Developer

Job Title: Senior Software Engineer C#
Location: Los Angeles, CA (Local Candidates Preferred)
Job Type: Contract

STAFFXPERT LLC is seeking a Senior Software Engineer C# on behalf of our client in Los Angeles, CA. This role is ideal for a highly skilled software engineer with strong expertise in building scalable, secure, and high-performance systems. The selected candidate will contribute to Banking-as-a-Service (BaaS) initiatives, supporting partner onboarding and platform enhancements that power embedded financial services.

The ideal candidate is passionate about modern software engineering, cloud-native architecture, and building resilient systems in a fast-paced, mission-critical environment.

• Design, develop, and maintain APIs and microservices to support partner integrations and onboarding initiatives.
• Collaborate with product managers, architects, and engineering teams to define technical requirements and deliver scalable software solutions.
• Promote engineering excellence through code reviews, mentorship, and implementation of best practices in CI/CD, automated testing, and observability.
• Contribute to monitoring, alerting, and reliability improvements to ensure service performance and SLA compliance.
• Participate in incident response, troubleshooting, and root cause analysis to strengthen platform stability.
• Create and maintain architectural documentation, technical specifications, and design artifacts.
• Evaluate emerging technologies and recommend solutions based on technical and business needs.
• Refactor and optimize existing systems to improve performance, scalability, and maintainability.
• Develop durable and flexible software solutions with a focus on long-term scalability and configurability.

• 5+ years of software engineering experience, including experience leading technical initiatives or mentoring engineering teams.
• Strong hands‑on expertise with C#, .NET, SQL, and cloud technologies
  , particularly within Azure environments.
• Experience with Azure services such as API Management, cloud databases, secure key management, and event‑driven systems.
• Solid understanding of RESTful APIs, OAuth2, and OpenAPI specifications
  .
• Experience designing and supporting microservices architectures and event‑driven applications.
• Hands‑on experience with monitoring and observability tools.
• Strong understanding of Git, Dev Ops practices, Agile/Scrum methodologies, and software security best practices
  .
• Knowledge of compliance and security standards relevant to highly regulated environments.
• Ability to thrive in a fast‑paced environment supporting customer‑facing applications.

• Experience in Fin Tech, Banking-as-a-Service (BaaS), or embedded finance platforms
  .
• Familiarity with partner onboarding workflows and service-level management.
• Contributions to open‑source projects or technical publications are a plus.

This opportunity offers the chance to work on innovative financial technology solutions, collaborate with high-performing engineering teams, and contribute to scalable systems that impact real-world customer experiences.

Interested candidates are encouraged to apply with their updated resume.