Backend Software Engineer II — APIs & Payments (Hybrid)

CoStar Group, Inc.; Richmond (VA); Hybrid; USD 108,000 - 140,000; Full time

Benefits offered by this job

Healthcare coverage

401(k) with matching

Tuition reimbursement

On-site fitness center

Job summary

CoStar Group, Inc. is seeking a Software Engineer II to join the back-end team in Richmond, VA.

The role focuses on building the next generation of backend services, APIs, and data integrations for financial data movement across platforms and an enterprise contracting system. You will work on configurable services, APIs, and data workflows, with a Friday work-from-home option and a Monday-Thursday in-office schedule.

Qualifications

• Bachelor's degree required from an accredited college/university.
• 3+ years of professional software development experience in server-side languages (C#, Go, Java or Node with TypeScript).
• Strong experience with relational databases, data modeling and performance optimization.
• Experience building scalable APIs and system integrations across REST APIs, message brokers or event streams.
• Experience building configurable, reusable frameworks for multiple integrations instead of hard-coded ones.
• Strong understanding of CI/CD, IaC, automated deployment, and source control.

Responsibilities

• Contribute to technical discussions and architectural decisions aligned with business goals.
• Design, develop, and maintain robust back-end applications and APIs with the .NET stack, SQL, and related data tools.
• Champion maintainable, well-tested code with clear separation of concerns and design patterns.
• Collaborate with engineering, product, DevOps, and DBA teams to deliver production systems and participate in code reviews.
• Translate business requirements into technical designs and development-ready specifications.

Skills

C#

GoLang

Java

Node with TypeScript

SQL

REST APIs

CI/CD

AI copilots

Education

Bachelor's degree

Tools

RabbitMQ

SQS

Kafka

Azure Service Bus

Docker

Kubernetes

Elasticsearch/OpenSearch

Job description

CoStar Group, Inc. is seeking a Software Engineer II to join the back-end team in Richmond, VA.

The role focuses on building the next generation of backend services, APIs, and data integrations for financial data movement across platforms and an enterprise contracting system. You will work on configurable services, APIs, and data workflows, with a Friday work-from-home option and a Monday-Thursday in-office schedule.