Senior Backend Developer

Job Summary

First.tech Group seeks a Senior Backend Developer to design and build scalable, secure, and high-performance backend systems and APIs. You will develop backend services using .NET Core and modern engineering practices, leveraging AI-assisted development tools while ensuring code quality and maintainability.

Responsibilities

• Design and build scalable, secure, and high-performance backend systems and APIs
• Develop backend services using .NET Core with AI-assisted development tools
• Review, validate, and optimize AI-generated code through testing, debugging, and peer reviews
• Design and develop RESTful APIs, integrations, and distributed services
• Optimize application performance, database queries, and system reliability
• Build and maintain automated tests to ensure production-ready software
• Manage deployments across development, testing, and production environments while supporting CI/CD practices
• Collaborate with Product, Engineering, and cross-functional teams in an Agile environment

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related technical field
• 8+ years of experience building scalable backend applications using .NET Core, C#, and MS SQL Server
• Experience working in an AI-assisted development environment using coding assistants such as Claude Code, GitHub Copilot, or Cursor
• Strong ability to review, validate, debug, and optimize AI-generated code for quality, security, performance, and maintainability
• Proven experience designing scalable application architectures, APIs, and distributed systems
• Strong understanding of software design patterns, system integration, and performance optimization
• Experience building and consuming RESTful APIs and working with relational databases
• Experience writing and maintaining automated tests and implementing CI/CD best practices
• Proficiency with Git, GitHub, Jira, and modern Agile development methodologies
• Experience with cloud platforms, Docker, and containerized deployments is an advantage; front-end experience with React is a plus

We refresh listings regularly, but some roles close early on the source platform.