Senior Solution Architect – C#/.NET, React, Microservices & Cloud Modernization
Location: Sacramento, CA (1st Preference) / Walnut Creek, CA / San Francisco, CA
Employment Type: Contract – W2
Duration: 6+ Months
Experience Required: Not specified in the JD.
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.
Application Instructions
Interested and qualified candidates are requested to share their updated resume, current location, visa status, contact number, and expected hourly rate.
