.Net Software Engineer

eSolutionsFirst, LLC; Vienna (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

eSolutionsFirst, LLC seeks a Senior .NET Fullstack Developer to lead the design, development, and delivery of scalable enterprise applications across frontend, backend, APIs, and data platforms.

You will architect complex systems, mentor engineers, and drive best practices using .NET, React/Angular, SQL, and Azure in a cloud-native, microservices environment.

Qualifications

• 5+ years of software development experience.
• Expertise in C#, .NET Core, Entity Framework, and microservices.
• Strong React experience with modern frontend architectures.
• Proficient in RESTful APIs, GraphQL, and API security.

Responsibilities

• Architect, design, and develop scalable full-stack applications using .NET, Azure, and SQL.
• Lead technical design discussions and establish engineering standards, patterns, and best practices.
• Design secure, scalable, and high-performing RESTful and GraphQL APIs.
• Optimize database architecture, data modeling, indexing strategies, and query performance.
• Own end-to-end delivery of major features from requirements through production deployment.
• Mentor engineers through code reviews, technical guidance, and knowledge sharing.
• Collaborate with Product, Engineering, and DevOps teams to define roadmaps and technical solutions.
• Drive cloud-native application development and microservices architecture.
• Partner with DevOps teams on CI/CD, observability, monitoring, and platform reliability.
• Lead troubleshooting, incident response, and production issue resolution.

Skills

C#

React

RESTful APIs

GraphQL

SQL

Microservices

Azure

Entity Framework

Tools

Entity Framework

Job description

Position: .Net Fullstack Developer

Duration: 12 Months with possible extension

Location: Vienna, VA

Position Summary

We are seeking a Senior Full Stack Engineer to lead the design, development, and delivery of scalable enterprise applications across frontend, backend, APIs, and data platforms. This role requires a hands‑on technical leader who can architect complex systems, mentor engineers, drive best practices, and deliver high‑quality solutions using .NET, React/Angular, and SQL technologies. Expertise in AI Assistant tools like Claude or Copilot for generating and reviewing codes.

Key Responsibilities

• Architect, design, and develop scalable full-stack applications using .NET, Azure, and SQL.
• Lead technical design discussions and establish engineering standards, patterns, and best practices.
• Design secure, scalable, and high-performing RESTful and GraphQL APIs.
• Optimize database architecture, data modeling, indexing strategies, and query performance.
• Own end-to-end delivery of major features from requirements through production deployment.
• Mentor engineers through code reviews, technical guidance, and knowledge sharing.
• Collaborate with Product, Engineering, and DevOps teams to define roadmaps and technical solutions.
• Drive cloud-native application development and microservices architecture.
• Partner with DevOps teams on CI/CD, observability, monitoring, and platform reliability.
• Lead troubleshooting, incident response, and production issue resolution.

Required Qualifications

• 5+ years of software development experience
• Deep expertise in C#, Core, Entity Framework, and microservices architecture.
• Strong experience building large-scale React applications and modern frontend architectures.
• Advanced knowledge of RESTful APIs, GraphQL, API security, versioning, and performance optimization.
• Strong SQL expertise including query optimization, indexing, schema design, and performance tuning.