Senior Software Engineer, BaaS & Fintech APIs

Russell Tobin; Los Angeles (CA); On-site; USD 83,000 - 92,000; Full time

Job summary

Russell Tobin is recruiting on behalf of a leading fintech and financial services company for a Senior Software Engineer - BaaS in West Los Angeles, CA. You will design and build APIs and microservices, enabling embedded financial services across a partner ecosystem and driving scalable, secure platforms.

Ideal candidates have 5+ years of software engineering with leadership exposure, strong C#, .NET, SQL skills, and hands-on Azure cloud experience, plus a proven track record in CI/CD, security,

Qualifications

• 5+ years of software engineering experience, including at least 1 year in a technical leadership role.
• Strong portfolio of secure, standards-compliant code across multiple platforms.
• Proficiency in C#, .NET, SQL and cloud platforms (Azure) plus container tech.

Responsibilities

• Design and develop APIs and microservices that support BaaS onboarding and partner integration.
• Collaborate with product managers, architects, and other engineering teams to define technical requirements and deliver robust solutions.
• Support engineering excellence through code reviews, mentoring, and best practices in CI/CD, testing, and observability.
• Ensure compliance with SLA standards and contribute to the development of monitoring and alerting systems.
• Contribute to incident response and root cause analysis to improve system reliability.
• Draft architectural and design documentation to assist design options analysis and decision making.
• Evaluate emerging technologies from applicability to feasibility to adoption paths.
• Refactor and extend the existing codebase to fix defects and add features/functionality.
• Create systems that are durable and flexible by developing for change; favor configurability over customization.

Skills

C#

.NET

SQL

RESTful API design

OAuth2

OpenAPI specifications

Event-driven architecture

Git

DevOps

Agile Scrum

Security best practices

PCI DSS

SOC 2

Cloud platforms (Azure)

Microservices

Monitoring and observability

Tools

Azure APIM

Azure SQL

Cosmos DB

Key Vault

Service Bus

Event Hubs

Datadog

Grafana

CI/CD pipelines

Job description

Russell Tobin is recruiting on behalf of a leading fintech and financial services company for a Senior Software Engineer - BaaS in West Los Angeles, CA. You will design and build APIs and microservices, enabling embedded financial services across a partner ecosystem and driving scalable, secure platforms.

Ideal candidates have 5+ years of software engineering with leadership exposure, strong C#, .NET, SQL skills, and hands-on Azure cloud experience, plus a proven track record in CI/CD, security,