Senior Technical Lead – C#/.NET, React & Azure/AWS Cloud Architecture

Location: Remote – USA
Employment Type: Contract (W2 only)
Duration: 6+ Months
Experience Required: 12 +Years

Job Overview

We are seeking an experienced Senior Technical Lead with strong expertise in C#, .NET, React, Azure/AWS, Microservices, Security, and DevOps.

The ideal candidate will be responsible for designing enterprise-level applications, defining technical architecture, leading development teams, and driving cloud migration and modernization initiatives. The candidate must have strong hands-on development and solution architecture experience across cloud and hybrid environments.

Key Responsibilities

• Design and lead enterprise application architecture using C#, .NET, and React.

• Develop and implement Microservices, REST APIs, and cloud-native applications.

• Apply software architecture and design patterns to build scalable and maintainable applications.

• Lead legacy application modernization and cloud migration initiatives.

• Design secure applications using industry security standards and best practices.

• Implement authentication, authorization, API security, and data protection.

• Optimize application, database, and front-end performance.

• Build and maintain CI/CD pipelines for automated software deployment.

• Lead technical discussions, architecture reviews, and code reviews.

• Troubleshoot complex application performance, scalability, and reliability issues.

• Guide development teams and establish technical standards.

Mandatory Technical Skills

Backend Development

• Strong expertise in C# and .NET / .NET Core.

• Enterprise API development and REST APIs.

• Object-Oriented Programming and Design Patterns.

• Distributed Systems and Microservices Architecture.

Frontend Development

• Strong hands-on experience with React.

• JavaScript / TypeScript.

• Front-end architecture, component design, and state management.

• Front-end performance optimization.

Cloud & Infrastructure

• Hands-on experience with Microsoft Azure or AWS.

• Cloud-native application development.

• Hybrid cloud architecture and cloud migration.

• Legacy application modernization (Re-hosting, Re-platforming, and Re-architecting).

Security

• Application and Cloud Security Architecture.

• OWASP Top 10 and Secure SDLC.

• OAuth2, OpenID Connect, JWT, and RBAC.

• Secrets Management, Data Encryption, and Network Security.

DevOps & Automation

• CI/CD Pipeline Implementation.

• Infrastructure as Code (Terraform / Ansible).

• Docker and Kubernetes.

Databases

• Microsoft SQL Server.

• NoSQL databases such as MongoDB.

• Database Performance Tuning and Optimization.

Architecture & Design Patterns

• Microservices and Event-Driven Architecture.

• Domain-Driven Design (DDD).

• CQRS, Saga, API Gateway, and GoF Design Patterns.

• Enterprise Integration and API Design Patterns.

Performance Optimization

• Application and Database Performance Optimization.

• Load Testing, Performance Testing, and Application Profiling.

• Monitoring and Observability using Application Insights, Prometheus, or Grafana.

• Scalability and Capacity Planning.

Development Practices

• Agile (Scrum / Kanban).

• Git and Jira.

• Automated Testing and Quality Engineering Practices.

Required Qualifications

• 10–12 years of overall software engineering experience.

• Significant experience in a Technical Lead or Solution Architect role.

• Proven hands-on expertise in C#, .NET, React, and Azure or AWS.

• Strong experience designing and delivering large-scale enterprise applications.

• Proven experience with Microservices, Security, and DevOps.

• Experience leading hybrid modernization and cloud migration programs.

• Experience working in cloud and hybrid-cloud environments.

• Demonstrated experience in enterprise security architecture and performance optimization.

• Strong technical leadership and problem-solving skills.

Preferred Skills

No separate preferred skills were specified in the client JD.

Work Arrangement

• Fully Remote.

• No onsite or hybrid attendance requirement specified.

Application Instructions

Interested candidates are requested to share their updated resume, contact number, email address, current location, and availability.