Senior Solution Architect C#/.NET, React, Microservices & Cloud Modernization (ONLY W2)

Job Overview

We are seeking an experienced Solution Architect with strong expertise in C#, .

NET, React, Microservices, Cloud Technologies, Security, and DevOps. The candidate will be responsible for defining solution architecture, leading hybrid modernization initiatives, and delivering scalable, secure, and high-performance enterprise applications across on-premises, hybrid, and cloud environments.

Key Responsibilities

• Define and own solution architecture for enterprise applications built using C#, .NET, and React.
• Apply architecture and design patterns, including Layered, Hexagonal, CQRS, Event Sourcing, Saga, API Gateway, Strangler Fig, and GoF patterns.
• Architect and implement Microservices, REST APIs, and cloud-native applications.
• Design scalable, secure, and highly available distributed systems.
• Lead hybrid modernization and cloud migration initiatives, including assessment, target-state architecture, and phased migration of legacy and on-premises workloads.
• Integrate security practices into architecture and delivery, including threat modeling, identity and access management, secure API design, secrets management, and data protection.
• Ensure compliance with OWASP and enterprise security standards.
• Optimize application performance through profiling, caching, asynchronous processing, database tuning, and React front-end optimization.
• Build and optimize CI/CD pipelines for automated deployment and delivery.
• Collaborate with engineering teams and stakeholders to establish application architecture and technology standards.
• Troubleshoot complex application performance, scalability, and reliability issues.
• Conduct architecture and code reviews and enforce engineering best practices.

Mandatory Technical Skills

• Strong hands-on expertise in C# and .NET.
• React application architecture and optimization.
• Microservices architecture and REST API development.
• Cloud technologies and cloud-native application architecture.
• On-premises, hybrid, and cloud modernization.
• Architecture and design patterns: Layered, Hexagonal, CQRS, Event Sourcing, Saga, API Gateway, Strangler Fig, and GoF.
• Distributed systems design, scalability, security, and high availability.
• OAuth2/OIDC, Identity and Access Management (IAM), threat modeling, secure API design, secrets management, and data protection.
• OWASP and enterprise security standards.
• CI/CD pipeline development and optimization.
• Application profiling, caching, asynchronous processing, and database tuning.

Required Qualifications

• Strong solution architecture experience in enterprise application environments.
• Demonstrated expertise in C#, .NET, and React.
• Experience architecting Microservices and REST APIs.
• Experience designing scalable and secure distributed systems.
• Experience leading hybrid modernization and cloud migration initiatives.
• Experience implementing security practices across application architecture and delivery.
• Ability to conduct architecture reviews, code reviews, and technical troubleshooting.

Preferred Skills: No separate preferred skills are specified in the client JD.

Work Arrangement

• Preferred location: Sacramento, CA.
• Other acceptable locations: Walnut Creek, CA, and San Francisco, CA.
• Candidates should be available to work from one of the specified locations.
• No specific onsite or hybrid attendance schedule is provided in the JD.