LoopNet - Senior Software Engineer (C#/.NET)

Visual Lease; Irvine (CA); Hybrid; USD 124,000 - 187,000; Full time

Benefits offered by this job

Comprehensive healthcare coverage

401(k) retirement plan

Employee stock purchase plan

Paid time off

On-site fitness center

Job summary

Visual Lease in Irvine, California, is hiring a Senior Software Engineer specializing in C# and .NET to develop enterprise web applications for over 10 million users. The role requires strong programming skills and experience in AWS technologies.

Responsibilities include designing applications, writing unit-testable software, and collaborating in Agile teams. Benefits include a competitive salary range of $124,000–$187,000, comprehensive healthcare, and a flexible work arrangement.

Qualifications

• 7+ years of production-development experience with .NET or .NET Core.
• Experience with AWS cloud technologies.
• Demonstrable track record of building and launching enterprise products/platforms.

Responsibilities

• Design and develop enterprise applications for high reusability.
• Write unit-testable software in C#.
• Develop an in-depth understanding of product architecture.

Skills

C#

.NET

AWS

Apache Kafka

Vue

React

Angular

TypeScript

SQL

NoSQL

Education

Bachelor’s degree in a relevant field

Tools

Git

Job description

Senior Software Engineer (C#/.NET) – LoopNet

Location: Irvine, CA. Work arrangement: 4 days on‑site, 1 day remote. Join LoopNet as a Senior Software Engineer to develop and maintain enterprise web applications serving over 10 million users.

Responsibilities

• Design and develop enterprise applications using software design principles/patterns to attain high reusability and maintainability.
• Write unit‑testable software in C#.
• Develop an in‑depth understanding of CoStar’s product architecture and frameworks; maintain and contribute to the product platform as needed.
• Develop database stored procedures and SQL scripts that meet CoStar database standards to implement product requirements.
• Participate and drive continuous improvement within CoStar’s Agile/Scrum teams.
• Build consensus among different teams working on software development projects.
• Facilitate discussions among peer .NET and database developers to exchange new ideas and improvements.
• Continually evaluate emerging technologies to identify opportunities, trends and best practices that can strengthen CoStar’s technology platform and development practices.

Required Qualifications

• Bachelor’s degree from an accredited, not‑for‑profit university or college.
• Track record of commitment to prior employers.
• 7+ years of production‑development experience with .NET or .NET Core.
• Experience with AWS cloud technologies (file storage, data storage, search, cache), Apache Kafka.
• Frontend working knowledge of Vue, React, or Angular with TypeScript.
• Demonstrable track record of building and launching enterprise products/platforms.
• Develop products that meet specifications and performance SLAs; experience in unit, performance, and integration tests.
• Experience with Git‑based workflows.
• Deep understanding of enterprise application business logic.

Preferred Qualifications

• Experience in relational database design (MS SQL or MySQL) including performance optimization and NoSQL design.
• Application security knowledge.
• Leverage AI coding tools for development, refactoring, and debugging (Claude Code, GitHub Copilot, or equivalent).

Benefits & Compensation

• Base salary range: $124,000–$187,000 (based on relevant skills and experience).
• Comprehensive healthcare coverage: medical, vision, dental, prescription drug.
• Life, legal, and supplementary insurance.
• Virtual and in‑person mental health counseling services for individuals and family.
• Commuter and parking benefits.
• 401(k) retirement plan with matching contributions.
• Employee stock purchase plan.
• Paid time off.
• Tuition reimbursement.
• On‑site fitness center and/or reimbursed fitness center membership costs (location dependent) including yoga studio, Peloton, personal training, group exercise classes.
• Access to CoStar Group’s Employee Resource Groups.
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks.

We welcome all qualified candidates who are currently eligible to work full‑time in the United States to apply. However, please note that CoStar Group is not able to provide visa sponsorship for this position.

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug‑free workplace and perform pre‑employment substance abuse testing.