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

ERPMark Inc; Sacramento (CA); On-site; USD 165,000 - 234,000; Full time

Job summary

ERPMark Inc. in Sacramento, CA is seeking an experienced Senior Solution Architect with deep expertise in C#, .NET, React, microservices, and cloud modernization to define enterprise architecture across on-prem, hybrid, and cloud environments.

You will lead modernization initiatives and deliver scalable, secure, high-performance applications. You will apply architectural patterns such as Layered, Hexagonal, CQRS, Event Sourcing, Saga, API Gateway, and Strangler Fig, design RESTful services,

Qualifications

• Strong solution architecture experience in enterprise applications.
• 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.

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 and phased migration.
• Integrate security practices into architecture and delivery, including threat modeling and IAM.
• Ensure compliance with OWASP and enterprise security standards.
• Optimize application performance through profiling, caching, asynchronous processing, and DB tuning.
• Build and optimize CI/CD pipelines for automated deployment and delivery.
• Collaborate with engineering teams and stakeholders to establish architecture and technology standards.
• Troubleshoot complex performance, scalability, and reliability issues.
• Conduct architecture and code reviews and enforce engineering best practices.

Skills

C# & .NET

React

Microservices

Cloud-native

Security architecture

CI/CD

Distributed systems

Job description

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.