<br>
Job Description
<br>
CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world’s real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives.
We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We’ve continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.
LoopNet, the most popular place to find a space, is the #1 global commercial real estate marketplace. With more than 12 million global unique monthly visitors, LoopNet provides brokers, buyers and sellers with what they need to meet and make deals. LoopNet has established itself as the most effective and far-reaching digital marketplace for commercial real estate owners and brokers. We are not done yet! We continue to focus on driving expansion by increasing market share in the US and abroad, continuously innovating and enhancing the product and growing a powerhouse global team to reach our goals.
Learn more about LoopNet.
Our team is seeking an accomplished full-stack Senior Software Engineer to join our team in supporting multiple software products and brands across the organization, such as www.LoopNet.com. You will have a direct impact on highly visible web applications that touch more than 30,000 users. You continuously learn emerging technologies and architecture advancements and apply the learnings to improve LoopNet’s software products.
This position is located in Irvine, CA and offers an option for a work schedule of 3 days onsite, 2 days remote.
Responsibilities
- Design and develop using Object Oriented design principles and software design patterns to attain high reusability and maintainability.
- Deep knowledge and experience in writing unit testable software with C#
- Optimize API performance through caching mechanisms, data pagination, request/response compression, and other performance enhancement techniques.
- Effectively troubleshoot API-related issues, debugging problems, and provide efficient solutions.
- Develop an in-depth understanding of CoStar’s product architecture and frameworks.
- Maintain and contribute to CoStar’s product platform as necessary.
- Develop database stored procedures and SQL scripts/ETL jobs 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 other .NET and database developers to exchange new ideas and improvements.
- Continually evaluate emerging technologies to identify opportunities, trends and best practices that can be used to strengthen CoStar’s technology platform and development practices.
Basic Qualifications
- Bachelor’s Degree required from an accredited, not for profit university or college
- A track record of commitment to prior employers
- 5+ years of technical/development experience using modern web technologies
- 3+ years of experience in React, .NET (or .NET Core), C# development
- Hands-on API design and development using RESTful or SOAP APIs. Familiar with API best practices, versioning, authentication, and security considerations.
- Proficiency in API Frameworks and Tools such as Swagger, Postman, or similar tools for API development, documentation, and testing
- Experience in SQL or NoSQL databases and be capable of efficiently write stored procedures, functions and ad-hoc queries to manipulate data through APIs.
- A demonstrable track record of building and launching successful products and platforms
- Deliver products that meet specifications and performance SLA
- Experienced in unit, performance, and automation testing
- Deeply understand what drives the business for which you are building software
- Take an active role in mentoring developers with ability to build consensus
Preferred Qualifications
- Experience with cloud technologies like AWS or Azure
- Experience in relational database design (Ex. MySQL) including performance tuning
- Experience with Java/J2EE, Spring Boot, C#, .Net (.Net Core), TypeScript, SocketIO, Elastic Search, MongoDB, MySQL, Kibana, Datadog, Terraform
- Experience with Object Oriented patterns and principles
- Experience with Docker, Apache Kafka (or similar), Kubernetes (or similar)
- Experience with application integration between multiple large-scale system
- Experience with Microservices
- Experience working with tools like Git, Maven, JFrog, UDeploy
- Experience with unit testing TDD
- Experience in Agile environment
What’s in it for You
When you join CoStar Group, you’ll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed.
We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, tuition reimbursement, and an inter-office exchange program.
Our benefits package includes (but is not limited to):
- 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), with yoga studio, Pelotons, personal training, group exercise classes
- Access to CoStar Group’s Diversity, Equity, & Inclusion 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.
This position offers a base salary range of $124,000 - $211,000, based on relevant skills and experience and includes a generous benefits plan.
#LI-IZ1
<br>
CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing
0 applies
7 views
Other Jobs from CoStar
Senior Software Engineer in Test
Homes.com - Lead Software Engineer
Software Engineering Manager
Data Scientist Intern - Summer 2025
ML Technology Intern, Graduate Students
Hospitality Research Manager, STR
Similar Jobs
There are more than 50,000 engineering jobs:
Subscribe to membership and unlock all jobs
Engineering Jobs
60,000+ jobs from 4,500+ well-funded companies
Updated Daily
New jobs are added every day as companies post them
Refined Search
Use filters like skill, location, etc to narrow results
Become a member
🥳🥳🥳 401 happy customers and counting...
Overall, over 80% of customers chose to renew their subscriptions after the initial sign-up.
To try it out
For active job seekers
For those who are passive looking
Cancel anytime
Frequently Asked Questions
- We prioritize job seekers as our customers, unlike bigger job sites, by charging a small fee to provide them with curated access to the best companies and up-to-date jobs. This focus allows us to deliver a more personalized and effective job search experience.
- We've got about 70,000 jobs from 5,000 vetted companies. No fake or sleazy jobs here!
- We aggregate jobs from 5,000+ companies' career pages, so you can be sure that you're getting the most up-to-date and relevant jobs.
- We're the only job board *for* software engineers, *by* software engineers… in case you needed a reminder! We add thousands of new jobs daily and offer powerful search filters just for you. 🛠️
- Every single hour! We add 2,000-3,000 new jobs daily, so you'll always have fresh opportunities. 🚀
- Typically, job searches take 3-6 months. EchoJobs helps you spend more time applying and less time hunting. 🎯
- Check daily! We're always updating with new jobs. Set up job alerts for even quicker access. 📅
What Fellow Engineers Say