Senior Software Engineer

CoStar Group

Confirmed live today High trust

Hybrid

Quick summary

Work type: Hybrid
Location: San Diego, CA
Salary: $124,000–$187,000 / yr
Employment: Full-time
Posted: 103 days ago
Freshness: Confirmed live today
Closes: Dec 31, 2026
Nearby: 99+ roles within 25 mi

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $164k

This role $156k

$109k $224k

below market most similar roles pay here above market

This role pays less than 63% of similar roles. Most pay $149,500–$178,175 — the blue band above. At the midpoint, this role pays about $156k versus about $164k for comparable roles.

Based on 240 similar postings.

Employer

About CoStar Group

CoStar Group is the leading provider of commercial real estate information, analytics, and online marketplaces, including CoStar, Apartments.com, and LoopNet platforms. Industry: Commercial Real Estate Data & Analytics

CoStar Group currently has 59 open roles on FindRole.

Listed pay typically runs $133,000–$190,000 across 59 roles with salary data.

Most-posted roles

View all roles at CoStar Group

At a glance

TL;DR · Senior Software Engineer

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The Senior Software Engineer joins the engineering team to design, build, and maintain production applications using C# and .NET. The role focuses on developing scalable, cloud-native solutions and building backend services while leveraging Claude for AI-assisted development, including code generation, refactoring, and debugging. Key responsibilities include operating systems on AWS using services like EC2, ECS/EKS, Lambda, S3, RDS, and DynamoDB. The engineer will participate in system design, code reviews, and technical decision-making to improve application performance and reliability. Required skills include C#/.NET Core, Git-based workflows, and software design principles. Preferred experience includes Databricks, microservices, CI/CD pipelines, and Infrastructure-as-Code tools like Terraform, CloudFormation, or CDK. This position addresses the technical challenge of building robust real estate information and online marketplace systems.

What does a Software Engineer earn in California?

Median $214500 from 1193 postings across 76 companies.

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Skills

C# .NET .NET Core AWS Claude EC2 ECS EKS Lambda S3 RDS DynamoDB CloudWatch APIs Git Databricks Microservices CI/CD Terraform CloudFormation CDK

What you'll do

Design, build, and maintain production applications using C# and .NET.
Use Claude for AI-assisted code generation, refactoring, debugging, and analysis.
Build and operate cloud-native solutions on AWS platforms.
Participate in system design, code reviews, and technical decision-making.
Improve application performance, scalability, and reliability.
Mentor engineers and contribute to engineering best practices.

What we're looking for

Bachelor's degree from an accredited, not-for-profit, in-person college/university.
Strong experience with C# and .NET / .NET Core.
Hands-on AWS experience with EC2, ECS/EKS, Lambda, S3, RDS, DynamoDB, and CloudWatch.
Experience building APIs and backend services.
Solid understanding of software design principles.
Experience with Git-based workflows.
Practical experience using Claude for coding or code review (preferred).
Experience with Databricks, microservices, CI/CD, or Infrastructure-as-Code (preferred).

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