Senior Software Engineer - AI-Driven Cloud (C#/AWS)

CoStar Group; Irvine (CA); Hybrid; USD 124,000 - 187,000; Full time

Benefits offered by this job

Comprehensive benefits package

Hybrid work model

Job summary

CoStar Group’s LoopNet brand in Irvine, CA seeks a Senior Software Engineer with deep expertise in C#/.NET, AWS, and AI coding tools to build scalable backend systems across LoopNet.com and other brands. You will contribute to architecture decisions and mentor engineers while delivering high-quality software.

This role is hybrid with four days onsite and one day remote. A Bachelor's degree and 6+ years of experience required; strong API design, testing, and backend knowledge.

Qualifications

• Bachelor’s degree from an accredited university.
• 6+ years of production development experience with C# and .NET.
• Experience delivering products that meet specifications and performance SLAs.
• Solid experience writing unit, performance, and automated end-to-end tests
• Strong experience building APIs and backend systems with solid design principles.
• Active participation in mentoring developers and building team consensus.

Responsibilities

• Build scalable, high-quality systems across multiple products and brands including LoopNet.com.
• Contribute to architecture decisions and mentor engineers across the team.
• Leverage AI-driven development practices to accelerate delivery and improve code quality.

Skills

C# / .NET

Unit tests

APIs

Mentoring

Backend systems

Software design

Education

Bachelor's degree

Tools

AWS

Docker

Kubernetes

Kafka

Datadog

S3

SQS

DynamoDB

ElastiCache

Job description

CoStar Group’s LoopNet brand in Irvine, CA seeks a Senior Software Engineer with deep expertise in C#/.NET, AWS, and AI coding tools to build scalable backend systems across LoopNet.com and other brands. You will contribute to architecture decisions and mentor engineers while delivering high-quality software.

This role is hybrid with four days onsite and one day remote. A Bachelor's degree and 6+ years of experience required; strong API design, testing, and backend knowledge.