Senior C# API Developer

Naico ITS; United States; Remote; USD 120,000 - 160,000; Full time

Job summary

Naico ITS is seeking a backend engineer to design and build scalable REST APIs and services using C#, ASP.NET Core, and .NET 8+. You will own core components and collaborate with AI-assisted tooling and cloud platforms.

You will optimize PostgreSQL data models, implement Redis caching and asynchronous messaging with AWS SQS, and contribute to a modular monolith architecture with SOLID principles. Docker and AWS experience are a plus.

Qualifications

• Experience in C#, ASP.NET Core, and .NET 8+.
• Strong database design and query optimization with PostgreSQL.
• Experience with Redis caching and AWS SQS.
• Familiarity with AWS cloud services and Docker.
• Knowledge of Modular Monolith Architecture, SOLID principles, and design patterns.
• Experience with AI-assisted and agentic development tools.
• Strong debugging, problem-solving, and code ownership skills.

Responsibilities

• Design, develop, and maintain scalable REST APIs and backend services.
• Optimize database schemas, queries, indexes, and transactions.
• Implement caching and asynchronous messaging solutions.
• Develop a modular monolith with clear module boundaries and future scalability in mind.
• Review, test, debug, and maintain AI-generated and human-written code.
• Ensure API security, performance, code quality, and maintainability.
• Support Docker-based deployments and AWS services.
• Collaborate with technical leads and team members to deliver reliable enterprise solutions.

Skills

C# & ASP.NET

REST API backend

PostgreSQL & SQL

Redis & SQS

AWS & Docker

Modular Monolith

SOLID & patterns

AI-assisted tools

Debugging & ownership

Job description

Required Skills

• Strong experience in C#, ASP.NET Core, and .NET 8+
• Expertise in REST API development and backend services
• Strong PostgreSQL and SQL skills, including database design and query optimization
• Hands-on experience with Redis caching and AWS SQS
• Knowledge of AWS cloud services and Docker
• Understanding of Modular Monolith Architecture, SOLID principles, and design patterns
• Experience with AI-assisted and agentic development tools
• Strong debugging, problem-solving, and code ownership skills

Key Responsibilities

• Design, develop, and maintain scalable REST APIs and backend services.
• Optimize database schemas, queries, indexes, and transactions.
• Implement caching and asynchronous messaging solutions.
• Develop a modular monolith with clear module boundaries and future scalability in mind.
• Review, test, debug, and maintain AI-generated and human-written code.
• Ensure API security, performance, code quality, and maintainability.
• Support Docker-based deployments and AWS services.
• Collaborate with technical leads and team members to deliver reliable enterprise solutions.

Good to Have

• Experience with CI/CD pipelines, automated testing, monitoring, and production troubleshooting.
• Knowledge of Clean Architecture and Domain-Driven Design (DDD).