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Added 3 mins ago
Senior Technical Account Manager
Red Hat, LLC
Remote, United States
Red Hat’s Technical Account Management team is looking for an enterprise-level engineer with a background in Red Hat Enterprise Linux to join us remotely in the East region of the United…
Added 4 mins ago
Process Engineer
Statco Engineering & Fabricators LLC
Remote, United States
At ProMach, you'll be challenged and rewarded as you help improve packaging performance and shape the future of automation. And we’ll be proud to have you on the journey.
Added 5 mins ago
Forward Deployed Engineer, AI Transformation -Senior Vice President
Citi
IRVING, TX · Irving, TX · Irving
We are seeking a highly motivated and innovative Forward Deployed Engineer to join our dynamic team. In this pivotal role, you will be at the forefront of our AI transformation journey,…
Added 6 mins ago
Software Product Management Pre Sales Senior Manager - Consumer Goods & Services
Accenture LLP Company
NY
As Senior Manager, Pre-Sales you support complex software sales cycles by delivering compelling product demonstrations, responding to technical and functional requirements, and building…
Added 7 mins ago
Associate Software Engineer
The Boeing Company
Albuquerque, NM · El Segundo, CA
The Boeing Company has an exciting opportunity for an Associate Software Engineer, Front End Developer to support the Space Mission Systems (SMS) Rapid Space Capabilities (RSC) portfolio,…
Added 8 mins ago
Mission Engineer II - Grand Rapids
Axon
Remote, United States
…and justice issues with our ecosystem of devices and cloud software. Like our products, we work better together. We connect with candor and care, seeking out diverse perspectives from our…
Added 11 mins ago
BR
Senior Development Test Engineer
Beyond Reach Labs
Brooklyn, NY
- $120,000 to $160,000 USD / year
As a Senior Development Test Engineer at BRL, you will lead the design, build, and operation of the test infrastructure that proves out our hardware. You will own test strategy and…
Added 15 mins ago
ST
Business Development Engineer (BDE), USSOCOM
Silvus Technologies, Inc.
Remote, United States
- $100,000 to $140,000 USD / year
Silvus is seeking a Business Development Engineer, USSOCOM to join the Applications Engineering team. This role is structured for early- to mid-career candidates seeking to bridge technical…
Added 15 mins ago
ST
Business Development Engineer (BDE), US Air Force
Silvus Technologies, Inc.
Remote, United States
- $100,000 to $140,000 USD / year
Silvus is seeking a Business Development Engineer, US Air Force to join the Applications Engineering team. This role is structured for early- to mid-career candidates seeking to bridge…
Added 15 mins ago
ST
Business Development Engineer (BDE), US Marine Corps
Silvus Technologies, Inc.
Remote, United States
- $100,000 to $140,000 USD / year
Silvus is seeking a Business Development Engineer, US Marine Corps to join the Applications Engineering team. This role is structured for early- to mid-career candidates seeking to bridge…
Added 16 mins ago
Industrialization Engineer
Waymo
Mountain View, CA · Novi, MI
Hardware Engineering is an innovative and collaborative group of electrical, mechanical, reliability, software and vehicle engineers. We design, build, and perfect the products which are…
Added 16 mins ago
EN
Firmware Engineer II
Epia Neuro
Alameda, CA
- $115,000 to $140,000 USD / year
We're looking for a Firmware Engineer II who is passionate about developing and testing embedded software for medical devices. You'll contribute to the design, implementation, and testing…
Added 18 mins ago
Principal Software Engineer, Platform (DevEx)
ServiceTitan, Inc.
Remote, United States
15-20+ years of software engineering experience, with recent (last 6–12 months) hands-on work building coding-agent-runtime infrastructure - agent orchestration, harnesses, or LLM reasoning…
Added 18 mins ago
Staff Software Engineer, Platform (DevEx)
ServiceTitan, Inc.
Remote, United States
This is a Staff Software Engineer role per ServiceTitan's engineering leveling framework: 10+ years of experience, Advanced Engineer level, working across squad(s)-scale, large or…
Added 19 mins ago
T
Principal Software Engineer Manager (AI Infrastructure) - North America Software Center
TSMC
Vancouver, WA
- $166,800 to $223,050 USD / year
We are seeking an experienced and visionary Principal Software Engineer Manager (AI Infrastructure) to build and lead a high-performing engineering team dedicated to defining and delivering…
Added 19 mins ago
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IT Operations Engineer
Blacksmith
New York City, NY
- $150,000 to $170,000 USD / year
We're hiring our first IT Operations Engineer to own the systems and workflows our employees rely on. You'll shape how IT operates at Blacksmith, from onboarding and device management to…
Added 22 mins ago
Site Reliability Engineer 2 - Production Engineering
Anduril Industries
Seattle, WA
Our team operates at the intersection of software engineering and systems reliability. We run on-call and incident management tooling, build observability and automation, and create the…
Added 22 mins ago
Site Reliability Engineer 2 - Production Engineering
Anduril Industries
Costa Mesa, CA · Seattle, WA
Our team operates at the intersection of software engineering and systems reliability. We run on-call and incident management tooling, build observability and automation, and create the…
Added 28 mins ago
Senior Associate - Full-Stack AI & Data Engineer
New York Life
New York
· Stay current with advancements in Generative AI, LLMs, cloud technologies, and software engineering practices, identifying opportunities to improve efficiency, automation, and business…
Added 28 mins ago
Senior Associate - Full-Stack AI Engineer
New York Life
New York
· Stay current with advancements in Generative AI, LLMs, cloud technologies, and software engineering practices, identifying opportunities to improve efficiency, automation, and business…
Added 28 mins ago
Senior Associate - Full-Stack AI Engineer
New York Life
New York
· Stay current with advancements in Generative AI, LLMs, cloud technologies, and software engineering practices, identifying opportunities to improve efficiency, automation, and business…
Added 30 mins ago
Software Engineer III-ServiceNow
JPMC page
San Francisco, CA
As a Software Engineer III at JPMorganChase within the Infrastructure Platform ServiceNow IT Service Management , you serve as a seasoned member of an agile team to design and deliver…
Added 30 mins ago
Executive Software Engineer
Experis USA
South San Francisco, CA
We are seeking a Software Engineer to join our team.
Added 30 mins ago
Advanced Mfg Engineer Sr Adv
Aerospace
Tempe, AZ
Honeywell helps organizations solve the world's most complex challenges in automation, the future of aviation and energy transition. As a trusted partner, we provide actionable solutions…
Added 34 mins ago
IA
Software Solutions Engineer I
Inductive Automation LLC
On-Site: Columbia, MD
- $82,000 to $95,000 USD / year
…advanced manufacturing facilities all depend on industrial software that can't go down. As a Software Solutions Engineer I, you'll be the person customers call when something breaks,…

Closed listing

CoStar

Software Engineer I (C#/.NET)

Arlington, United States

$108,000 to $154,000 USD / year

This opening has closed.

The original listing is kept below for reference.

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Job details

Pay: $108,000 to $154,000 USD / year
Closing date: Apr 27, 2027
Education: Bachelor’s degree
Experience: 3+ years of deep .NET development (C#) development experience including cross platform communication technologies such as Web API.
Posting language: English
Posted: Oct 29, 2026

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Original job description

Archived listing. The details below describe a past opening.

Software Engineer I (C#/.NET)

Job Description

Overview

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, 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.

As a Software Engineer on the Platform Development team, you will play a key role in expanding the data platform that supports all of CoStar Group’s largest brands including CoStar Suite, LoopNet, Homes.com and Apartments.com. You will deeply understand what drives the business for which you are building software. We firmly believe that what separates a good developer from a great one is a deep understanding of the business that they are supporting.

CoStar is investing heavily in artificial intelligence to accelerate software delivery, improve platform observability, automate research and business workflows, enhance product experiences through intelligent agents and skills, and improve data quality across enterprise systems. Successful candidates will demonstrate a willingness to learn, adopt, and apply AI technologies responsibly to solve complex business and engineering challenges.

This position is in Arlington, VA and is in office Monday through Thursday with work from home on Friday.

Responsibilities

Build big, distributed, API-driven systems for tens of thousands of users.
Design and implement AI-powered software solutions that enhance the customer experience, improve platform intelligence, and unlock new product capabilities across CoStar brands.
Build and integrate AI skills, agents, tools, and intelligent workflows into internal systems and customer-facing applications.
Produce bullet-proof code that is robust, efficient, and maintainable; our primary tools are C#, .NET Framework, SQL Server, AWS, Claude Code.
Utilize AI models to enhance monitoring, replayability, observability, and diagnostic capabilities to improve system reliability, accelerate problem resolution, and reduce operational risk.
Implement telemetry-driven solutions that proactively identify anomalies, performance bottlenecks, and potential customer-impacting issues.
Learn software design, development standards, and take part in code reviews.
Build intelligent automation solutions that streamline research workflows, improve information discovery, and increase operational efficiency across business functions.
Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices.

Basic Qualifications

Bachelor’s Degree required from an accredited, not for profit, in person university or college.
A track record of commitment to prior employers.
3+ years of deep .NET development (C#) development experience including cross platform communication technologies such as Web API.
Working knowledge and experience with cloud-based platforms (AWS or Azure).
Experience with RESTful web services.
Experience in architecting, designing, and building distributed, service-oriented systems and web applications in an agile environment.
Data modeling experience.
Familiarity with large language models (LLMs), prompt engineering, or agent-based architectures.
Experience working with monitoring, telemetry, observability, or automated diagnostics platforms.
Strong understanding of data quality principles, data governance concepts, and data-centric application design.

Preferred Qualifications and Skills

Strong communication skills (to both business and technical partners).
SQL and database development knowledge.
Familiarity with AWS PaaS services such as Lambda, DynamoDB, and SQS.
Data modeling experience from conceptual, logical, and physical designs.
Experience implementing AI agents, workflow automation platforms, or intelligent search solutions.
Experience applying AI-assisted software development practices to improve engineering productivity and code quality.

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, and tuition reimbursement.

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)
Access to CoStar Group’s Employee Resource Groups
Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

The final salary or hourly rate offered for this role will fall within the range set forth below based on a variety of factors, including but not limited to, geographic location, skills, and competencies.

Base Compensation: $108,000 - $154,000 Annually

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

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