Software Engineer, Storage (AccountsDB)

About the role

Anza is the core engineering team behind Solana, developing Agave, the network's primary validator client. As a Software Engineer specializing in storage, you will strengthen the AccountsDB storage engine, which holds every account on Solana and is read from and written to by every transaction. Your work improves the performance and reliability of the blockchain infrastructure.

Key responsibilities

• Design, implement and optimize AccountsDB's core storage paths: account file layout, account index, and read/write caching layers to improve throughput and latency.
• Reduce memory and disk requirements as account state grows, and improve flushing, cleaning, shrinking and purging to lower write amplification.
• Optimize snapshots, loading and index generation to shorten validator startup and catch-up times.
• Ensure account state stays correct across forks, rooting and crash recovery.
• Create and run tests including stress tests, fault injection and performance benchmarking.
• Work with runtime, block production and core protocol engineers and other client teams, document the design and behavior of AccountsDB, and review code.

Required profile

• Bachelor's degree in CS, Engineering or equivalent practical experience, with 3+ years architecting data stores, file systems, databases or high-throughput storage systems.
• Mastery of Rust, C or C++ and low-level storage mechanics (memory-mapped files, page caching, index structures, on-disk formats, garbage collection).
• Advanced knowledge of kernel and hardware I/O pipelines, NVMe constraints, buffered versus direct I/O and async interfaces like io_uring.
• Strong understanding of custom memory allocators, Linux kernel scheduling, page management and I/O under high throughput.
• Proven experience building concurrent systems, with knowledge of locks, lock-free structures and hardware memory models.
• Track record of profiling and tuning low-level code, debugging complex architectures and collaborating across teams.

Preferred qualifications

• Experience with LSM trees, B-trees or hash-based engines such as RocksDB, LevelDB or WiredTiger.
• Background in versioned data stores, snapshotting systems or blockchain state storage.
• Familiarity with Linux, systems automation tools and systems architecture.
• Active participation in Bitcoin, Ethereum or blockchain projects or the open-source community.