Senior Software Engineer - SQL/C#/.NET

About the Role

• Lead technical discussions and make critical architectural decisions aligned with business goals. • Design, develop, and maintain robust and scalable applications using the Microsoft .NET technology stack, SQL and other data tools. • Implement solutions using modern architecture paradigms including microservices and event-driven systems. • Ensure adherence to SOLID principles, design patterns, and clean coding standards. • Collaborate with cross-functional teams, participate in code reviews, and mentor junior developers. • Analyze business requirements and translate them into technical designs and development‑ready specifications. • Work across teams and departments to standardize data transfer and storage.

Key Responsibilities

• ▸architecture
• ▸.net development
• ▸microservices
• ▸code standards
• ▸technical design
• ▸data integration

What You Bring

CoStar welcomes all qualified candidates who are eligible to work full‑time in the United States. The company does not provide visa sponsorship for this position. • Bachelor’s Degree required from an accredited, not‑for‑profit university or college. • A track record of commitment to prior employers. • 5+ years of professional experience in software development using strongly typed languages for server‑side processing, such as C#, GoLang, Java or Node with TypeScript. • Strong experience with MS SQL Server, including relational database design and performance tuning. • Demonstrated experience building highly scalable software systems in both volume processing and performance. • Familiarity with microservices architecture and containerization using Docker and Kubernetes. • Experience with AWS or similar cloud platforms (Azure, GCP). • Strong understanding of CI/CD principles, infrastructure as code, and automated deployment pipelines and source control systems. • Strong analytical and problem‑solving skills with attention to detail and excellent communication skills. • Experience in unit, performance and automation testing. • Experience with NoSQL databases and API Gateway technologies. • Familiarity with observability tools like Kibana, Data Dog and other monitoring frameworks. • Hands‑on experience with Entity Framework for efficient data modeling and data access. • Databricks, Python or other ETL processing experience. • Experience with ElasticSearch or OpenSearch. • Payments experience a plus. • Experience with Identity & Access Management, like OAuth, JWT. • Exposure to serverless computing and event‑driven architecture, including but not limited to RabbitMQ, SQS, Kafka, or Azure Service Bus.

Requirements

• ▸bachelor's
• ▸c#
• ▸ms sql
• ▸docker
• ▸aws
• ▸ci/cd

Benefits

• Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug. • Life, legal, and supplementary insurance. • Virtual and in‑person mental health counseling services for individuals and families. • 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.

Work Environment

Office Full-Time