Backend Software Engineer II

Overview Job Description 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.    Role Description We are seeking a Software Engineer II to join a new team building the next generation of back-end services, APIs and integrations in the finance tech organization. Initially this role will focus on the systems that move financial data between external platforms and our enterprise contracting system, integrating with existing APIs, message queues and SQL databases. You will help build configurable, reusable services that can be extended to new sources, systems and acquisitions through configuration rather than one-off, hard-coded integrations. You will also help standardize how data moves across our billing systems to allow for greater visibility into patterns, errors and optimizations across a payments flow of billions of dollars a year. This position is in Richmond, VA and has a work schedule of Monday through Thursday in office and Friday work from home. Responsibilities Contribute to technical discussions and architectural decisions aligned with business goalsDesign, develop, and maintain robust and scalable back-end applications and APIs using the Microsoft .NET technology stack, SQL and other data toolsChampion maintainable, well-tested code and sound design: clear separation of concerns, loose coupling, and consistent use of established design patternsCollaborate with engineering, product, DevOps and DBA teams to deliver production systems and participate in code reviewsWork from requirements through delivery, partnering with senior engineers and business stakeholders to turn business context into technical designs and development-ready specifications Basic Qualifications Bachelor's degree required from an accredited, not-for-profit, in-person college/universityTrack Record of committment to prior employers3+ years of professional experience in software development using strongly typed languages for server-side processing, such as C#, GoLang, Java or Node with TypeScriptStrong experience with relational databases, including database design and performance optimizationExperience building scalable APIs and system integrations across REST APIs, message brokers or event streamsExperience building configurable, reusable frameworks that support multiple integrations or business processes rather than hard-coded, single-purpose implementationsStrong understanding of CI/CD principles, infrastructure as code, automated deployment pipelines, and source control systemsStrong analytical and problem-solving skills, with attention to detail and excellent communication skillsExperience with agentic engineering and AI-assisted development tools (e.g., Claude Code, GitHub Copilot) to accelerate software delivery Preferred Qualifications Exposure to serverless computing and event-driven architecture, including but not limited to RabbitMQ, SQS, Kafka, or Azure Service BusFamiliarity with microservices architecture, containerization (Docker, Kubernetes), and cloud platforms such as AWS, Azure or GCPFamiliarity with observability tools like Kibana, Datadog and other monitoring frameworksExperience with Elasticsearch or OpenSearch, including relevance and index tuning to power fast, accurate search across contract, billing and reference dataDatabricks, Python or other ETL processing experiencePayments or financial systems experience a plusDemonstrated ability to apply AI copilots or agentic workflows for code generation, code review, and root-cause analysis 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), with yoga studio, Pelotons, personal training, group exercise classes Access to CoStar Group’s Employee Resource GroupsComplimentary 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 - $140,000 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