About the role:

As a member of the Mirror Node Team, you are a backend developer fluent in APIs and relational databases. You are responsible for offloading queries and transaction history from consensus nodes by indexing an ever-increasing amount of data. The Mirror Node Team continually adds features that deliver for Hedera and the community while increasing scalability, reliability, and minimizing costs. You enjoy the challenge of optimizing queries and data structures to efficiently scale to hundreds of terabytes of historical data.

You may find yourself doing all of the following:

• Being responsible for the entire application lifecycle from design, implementation, testing, and deployment to day two operations
• Deploying APIs using gRPC, GraphQL, and REST
• Identifying and eliminating query bottlenecks
• Innovating, designing, implementing, and testing new approaches to improve speed and scalability
• Rotating release manager responsibilities via a GitOps-based deployment model

Qualification Requirements:

• 4+ years in Java
• 3+ years in relational databases (preferably PostgreSQL)
• 1+ years in Kubernetes
• REST APIs
• Spring Boot & DataData structures
• Strong problem-solving and reasoning skills
• Strong communication skills
• Collaborative mindset
• Adaptability
• Commitment to continuous learning and improvement

Other skills that are great to bring with you but that we can help you develop:

• Blockchain technology or DLT
• Distributed systems
• GitOps
• GraphQL
• gRPC and Protobuf design
• LGTM monitoring stack
• Sharded databases (Citus, Spanner, Vitess, Cassandra, etc.)
• Experience scaling systems to hundreds of terabytes