Principal Software Engineer

Avenue Code, LLC; Los Angeles (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

Avenue Code, LLC is seeking a Principal Software Engineer in Los Angeles to rearchitect the BaaS platform with cloud-native techniques. You will ensure scalable, secure systems, mentor teams, and lead API/microservice design for onboarding and partner integration.

You will collaborate with product and architecture teams, drive modern DevOps practices, maintain observability, and guide architectural decisions while evaluating new technologies for long-term strategy.

Qualifications

• Bachelor's degree in Computer Science or related field and six years of relevant experience.
• Portfolio showing secure, standards-compliant code across Microsoft stack and open-source technologies.

Responsibilities

• Lead the design and development of APIs and microservices for BaaS onboarding and partner integration.
• Collaborate with product managers, architects, and engineering teams to define technical requirements.
• Drive engineering excellence through code reviews, mentoring, and CI/CD practices.
• Ensure SLA compliance and contribute to monitoring and alerting systems.
• Lead incident response and root cause analysis to improve reliability.
• Drive architectural decisions for the BaaS platform and document options and decisions.
• Champion evaluation and adoption of emerging technologies.
• Refactor and extend codebase to fix defects and add features.

Skills

Mentoring

Code reviews

Cloud-native architectures

API design

Distributed systems

Education

Bachelor's degree in Computer Science or related field

Tools

C#

.NET

SQL Server

Azure/AWS

CI/CD (TeamCity, GitHub)

Observability tools (Datadog, Grafana)

Job description

Principal Software Engineer

Location: Los Angeles, CA

Contract: 8+ Months

Job Description:

Principal Engineer: Rearchitect Client Banking as a Service (BaaS) platform for the future using cloud native techniques.

Ensure software is designed and built with quality, maintainability, scalability, availability, extensibility, security, portability, and testability. Partner with product teams to shape the future state of products. Actively identify technical debt and work with internal stakeholders to address debt on an ongoing basis.

Understand evolving industry trends and identify new technologies and patterns which should be adopted, and old technologies which should be deprecated. Participate in code reviews, coach team members, and learn from receiving feedback.

Key Responsibilities

• Lead the design and development of 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.
• Drive 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.
• Lead incident response and root cause analysis to improve system reliability.
• Drive architectural decisions and long-term technical strategy for BaaS platform, including generating documentation around architectural and design options analysis and decisions.
• Champion emerging technologies evaluation and adoption.
• 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.

Required Skills: Education and experience

• Bachelor's degree or foreign equivalent in Computer Science, Accounting, Accounting Information Systems, or a related field, plus six (6) years of experience as a Principal Engineer, Software Engineer, or related occupation.
• A strong portfolio showing secure, standards-compliant code across multiple platforms, including the Microsoft stack and open-source technologies.

Experience must include:

• Languages and frameworks: C#, .NET, , and SQL Server.
• Cloud: Designing, developing, and hosting cloud-native applications in Azure or AWS. This includes Azure native services such as APIM, Azure SQL, Cosmos DB, and Key Vault, plus container technologies and caching frameworks.
• APIs and web services: RESTful API design, OAuth2, and OpenAPI specifications. Also, SOAP and XML/JSON business object representations.
• Architecture: Designing and building microservices frameworks, event-driven patterns (Service Bus, Event Hubs), and software design patterns and anti-patterns. Writing code for scalable, reliable systems.
• DevOps and delivery: Git and GitHub, CI/CD processes, build tools (TeamCity), pipelines, and blue-green deployments.
• Observability: Implementing and using observability dashboards and platforms (Datadog, Grafana).
• Methodology: Agile development, including Scrum and Extreme Programming.
• Security and compliance: 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.