Full Stack .NET Technical Lead

Quick Facts

• Location: 915 E 230th St, Carson, CA 90745 (3 days/week) — local candidate only
• Contract: 6+ months
• Experience: 12+ years

Description

Hands-on Full Stack Technical Lead with strong React/Next.js, .NET Core/C#, SQL Server, and AWS expertise. Lead scalable application architecture, micro frontends, microservices, API security, database optimization, legacy modernization, and cloud-native solutions while providing technical leadership and end-to-end delivery ownership.

Responsibilities

• Take ownership of key and critical modules, collaborating with offshore teams to ensure quality, scalability, and timely delivery
• Assess new requirements and the existing application/integration/database landscape and provide effort estimates and recommendations for modernization
• Design scalable, extensible Micro Frontend architectures and reusable UI component frameworks using React (preferably Next.js)
• Design and implement secure, scalable, high-throughput RESTful APIs and microservices using .NET Core/C#
• Lead data modeling and schema design, including indexing strategies and query performance tuning
• Design end-to-end full-stack solutions leveraging native AWS services for scalability, high availability, performance, and low latency
• Analyze legacy applications, database structures, and stored procedures; define refactoring strategies to modernize into cloud-native solutions
• Define common patterns for security, caching, error handling, resiliency, logging, and downstream integrations
• Provide technical leadership through architecture reviews, design/code reviews, and technical mentoring
• Collaborate with business SMEs, architects, and engineering teams throughout discovery, solution design, development, UAT, and production go-live

Requirements

• 12+ years of experience
• Strong hands-on experience with React (preferably Next.js) and .NET Core/C#
• Strong expertise in RESTful API design, TypeScript/JavaScript, C#, and SQL databases
• Experience with Micro Frontend architecture, Microservices, Clean Architecture, and secure API design using OAuth2/OIDC and JWT
• Strong understanding of software design principles, architectural patterns, and coding best practices
• Strong expertise in PostgreSQL and MS SQL for data modeling, schema design, indexing, and query optimization
• Experience modernizing legacy applications and migrating to cloud-native architectures
• Hands-on AWS cloud experience; basic understanding of DevOps and CI/CD