Senior Software Engineer – BaaS

Russell, Tobin & Associates; Almont (CO); On-site; USD 83,000 - 92,000; Full time

Job summary

Our client, a leading fintech company, is hiring a Senior Software Engineer – BaaS in West Los Angeles, CA. The role focuses on building APIs and microservices to enable embedded financial services and partner onboarding.

You will contribute to design, security, and observability while mentoring peers in a fast-paced environment. Strong experience in C#, .NET, SQL, and cloud platforms like Azure is required, along with knowledge of REST, OAuth2, and OpenAPI specifications.

Qualifications

• 5+ years in software engineering, with at least 1 year in technical leadership.

Responsibilities

• Design and develop APIs and microservices for BaaS onboarding and partner integration.
• Collaborate with product managers, architects, and engineering teams to define technical requirements.
• Support CI/CD, testing, and observability practices.

Skills

C#

.NET

SQL

Azure

APIM

Cosmos DB

Key Vault

OpenAPI

RESTful APIs

Security

Tools

Datadog

Grafana

Job description

Our client, a leading fintech and financial services company, is looking to hire a Senior Software Engineer – BaaS in West Los Angeles, CA.

Pay Rate Range: $60 to $67/hr on w2 (Without benefits), depending on experience

Responsibilities

Senior Software Engineer – BaaS

We are seeking a highly skilled and motivated Senior Software Engineer to join our BaaS team, supporting partner onboarding and BaaS platform enhancement initiatives. This role will be instrumental in building and supporting scalable, secure, and high-performance systems that enable embedded financial services across our partner ecosystem.

• 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.

5+ years of experience in software engineering, with at least 1 year in a technical leadership role.

• Strong portfolio of work showing experience developing secure and standards-compliant code across multiple platforms.
• Fluent in several of the following languages/platforms/libraries: C#, .NET, SQL, and hands-on experience with cloud platforms (Azure native services such as APIM, Azure SQL, Cosmos DB and Key Vault), container technologies, and caching frameworks.
• Solid understanding of RESTful API design, OAuth2, and OpenAPI specifications.
• Familiarity with event-driven (Service Bus, Event Hubs) and microservice based architecture patterns.
• Hands-on experience with leveraging and implementing observability dashboards and platforms (Datadog, Grafana).
• Ability to handle a fast-paced environment for iterative project turnarounds on mission & revenue critical, customer-facing applications.
• Deep knowledge in Git, DevOps, Agile Scrum, and security best practices in financial services and compliance standards (PCI DSS, SOC 2).

Preferred Qualifications

• Prior experience in fintech or embedded finance platforms.
• Familiarity with partner onboarding workflows and SLA management.
• Contributions to open-source projects or technical publications.