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Senior .Net Developer - Onsite

MSys Inc.

West LA, CAJobSeen 1 day agoSeen in employer's feed 1 day ago

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At a glance

Compensation
No compensation found
Location
West LA, CA
Work Authorization
Not specified

Olive lists jobs from US employers, including remote roles you can work from the United States.

Requirements

Credentials this posting asks for.

Bachelor's degree

Job overview

The Principal Engineer will help build a cloud-native banking and payments platform, leading API and microservices development for onboarding and partner integration. The role shapes technical requirements and architecture, drives engineering practices and technology adoption, and improves reliability through monitoring, incident response, and root cause analysis. The posting requires a bachelor's degree or foreign equivalent in a listed or related field and substantial software engineering experience.

Skills & qualifications

RequiredNice to have

Skills

C#.NETASP.NETSQL ServerAzureAWSAzure APIMAzure SQLCosmos DBKey VaultContainer TechnologiesCaching FrameworksRESTful API DesignOAuth2OpenAPISOAPXMLJSONMicroservicesEvent-Driven PatternsService BusEvent HubsSoftware Design PatternsGitGitHubCI/CDTeamCityBuild ToolsPipelinesBlue-Green DeploymentsDatadogGrafanaAgile DevelopmentScrumExtreme ProgrammingFinancial Services SecurityPCI DSSSOC 2Secure CodingCloud-Native Application Development

Qualifications

Bachelor's in Computer Science, Accounting, Accounting Information Systems, or Related FieldSix Years Related Experience13+ Years ExperienceUS Citizenship or Green Card

Full job description

**** In-person interview; *** Long term project Linkedin Must Onsite **** Due to security reasons only USC/GC ****

Job Summary

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

  • Build the next generation banking and payments platform.

  • Contribute towards moving the team forward in continuous integration, continuous delivery, cloud migration, and test-driven development practices.

  • Design highly scalable distributed solutions to handle large amounts of data.

  • Work on complex integration projects by working out API contracts, identifying gaps, and working out optimal solutions.

  • Document and demonstrate solutions by developing flowcharts, sequence diagrams and business process flow diagrams.

  • Organize and run working sessions by setting up agendas, driving discussions towards resolutions, and delegating actions to participants.

  • Own a component or capability during a project delivery stage and be on point for fulfilling the responsibility.

  • 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 Qualifications

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.

  • 13-15+ years of experience

Languages and Frameworks

  • C#, .NET, ASP.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).

Work Environment

Ability to thrive in a fast-paced environment with iterative project turnarounds on mission- and revenue-critical, customer-facing applications.

How this job compares

Set against the 2,296 open Principal Engineer jobs on Olive Jobs, counted October 30, 2026.

Pay
  • This postingNot listed
  • California median$175–272K/yr357 salary ranges
Openings
Olive Jobs lists 394 open Principal Engineer jobs in California and 2,296 across the US. 11% of them nationwide are listed as remote or flexible.
Hiring the most in California
Experience
This posting asks for at least 13 years of experience — more than three in four Principal Engineer postings that state a minimum ask for (median 8 years, across 1,881 postings).
Education
This posting asks for a bachelor's degree; 1,085 of the 2,296 open Principal Engineer jobs (47%) ask for a bachelor's degree or higher.

Counted across the open, public US postings on Olive Jobs on October 30, 2026. Pay medians are the middle values of the low ends and of the high ends of postings that list both ends of a range in the same cadence (a yearly salary or an hourly rate); a range's midpoint is halfway between its ends. Pay and experience figures resting on fewer than 20 postings are left out.

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