Senior Software Engineer, Database
Designs and optimizes storage backends, transaction management, and CRDT operations for Ditto's embedded edge database on resource-constrained devices. Requires 5+ years experience with database internals, Rust or C/C++, and storage engines like SQLite or RocksDB.
About the job
Responsibilities
- Design and maintain the storage backend abstraction layer and transaction management system that underpins Ditto's embedded database.
- Implement and optimize storage backends (e.g. SQLite, in-memory, RocksDB and other engines), including connection pooling, write serialization, and concurrency control for resource-constrained devices.
- Ensure CRDT document operations — merging, tombstone management, version tracking — are correct and performant at the storage layer.
- Own the reliability and performance of the storage layer, identifying and resolving performance bottlenecks.
- Design and maintain blob storage systems for large value handling across platforms.
- Work with product managers and other engineers to help design the future of the technology.
- Collaborate closely with our Query Engine team and the Data Sync team to optimize our embedded database for edge sync operations.
- Author RFCs, design and document system architecture, and collaborate with other teams within Ditto.
- Estimate the delivery timeline for projects and communicate with management and the broader team regarding project execution.
- Set team culture by example, expanding Ditto's culture of Trust, Communication, and Continual Improvement.
Requirements
- 5+ years of experience in software engineering, 2 or more in a Senior role or above, with a focus on database internals, storage engines, or low-level systems programming.
- Strong proficiency in Rust or excellent C/C++ skills with a willingness to learn Rust.
- Experience with embedded database systems (SQLite, RocksDB, LevelDB, LMDB, or similar) or storage engine internals.
- Understanding of transaction isolation, concurrency control, and ACID guarantees.
- Experience with indexing strategies (B-tree, LSM tree, etc.) and general familiarity with query engine concepts.
- A willingness to travel (including internationally) once a quarter for team get-togethers and design sessions.
- Strong communication skills, with an emphasis on written communication skills in particular.
Nice to Haves
- Bachelor's degree or higher in Computer Science or Engineering.
- Familiarity with Conflict-Free Replicated Data Types (CRDTs) or other distributed/replicated data structures.
- Experience writing custom SQLite VFS or extensions.
- Experience with RocksDB, LMDB, or similar key-value storage engines at a deep level.
- Background in embedded systems or mobile/cross-platform development for resource-constrained environments.
- Experience with property-based testing, fault injection, or other state-space exploration techniques.
- Experience with monitoring tools such as Prometheus or Grafana.
Skills
Rust, C++, Sqlite, Rocksdb, Leveldb, Lmdb, Crdt, Acid, B-Tree, Lsm Tree
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