Senior .Net Developer - Onsite

MSys Inc; West Hollywood (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

MSys Inc. seeks a Senior .NET Developer to join on-site in West LA, CA, focusing on a cloud-native BaaS platform. You will drive API and microservices development, engineering excellence, and secure, scalable systems in a fast-paced environment.

The role emphasizes collaboration with product teams, architecture decisions, and continuous improvement of CI/CD, testing, and observability practices. This is a long-term, onsite position requiring W2 or C2C arrangements.

Qualifications

• Bachelor's degree in Computer Science or related field and six years of software eng. experience.
• Proven experience with the Microsoft stack and open-source technologies.
• 13-15+ years of experience in engineering roles.

Responsibilities

• Lead design and development of APIs and microservices for BaaS onboarding.
• Collaborate with product managers and architects to define requirements.
• Drive CI/CD, testing, observability, and reliability improvements.
• Lead incident response and root cause analyses to improve systems.

Skills

C#/.NET

API design

Cloud architecture

CI/CD

Education

Bachelor's degree in Computer Science or related field

Six years of professional software engineering experience

Tools

Azure

AWS

Git/GitHub

Datadog

Grafana

TeamCity

Job description

Title:Senior .Net Developer - Onsite

Location:West LA, CA

Length:Long term

Restriction:w2 or c2c

Description:

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.