Java Senior Software Engineer

About MariaDB

MariaDB is making a big impact on the world. Whether you’re checking your bank account, buying a coffee, shopping online, making a phone call, listening to music, taking out a loan, or ordering takeout – MariaDB is the backbone of applications used everyday. Companies small and large, including 75% of the Fortune 500, run MariaDB, touching the lives of billions of people. With massive reach through Linux distributions, enterprise deployments, and public clouds, MariaDB is uniquely positioned as the leading database for modern application development.

The Role

You will be responsible for the development and testing of a highly scalable, geo-distributed, highly performant database solution. You should have experience working on distributed software solutions and have a strong background working with on-premise and cloud-based solutions. You will also be responsible for managing a number of Software Engineers on the project.

What You’ll Do

• Ensure the scalability, performance, and reliability of the database system.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Troubleshoot and resolve complex issues in distributed environments.
• Profile, debug, and fine-tune performance with tools like JFR, JMC, async-profiler and VisualVM—and your own tricks.
• Keep code clean and reviewable with Git.
• Develop and optimize the data structures for providing the best experience accessing data in high data-intensive scenarios.
• Implement the best way to store data to disk and send data over the network to other nodes (including failure handling and recovery after failures).
• Implement and integrate algorithms for high availability of the whole cluster.
• Investigate flaws in data consistency algorithms, which may require thorough debugging either on multi-node clusters and in low-level byte-represented data.

What You Bring

• 4+ years of experience in Java programming.
• Deep knowledge of concurrency in Java and Java Memory Model and/or of concurrency model in other programming systems.
• Excellent Java SE knowledge including IO, JVM internals, etc.
• Experience with SQL databases.
• Experience in troubleshooting Java applications and/or databases.
• Excellent leadership, problem-solving, and debugging skills.
• Experience working effectively in a fast-paced, collaborative environment.
• Deep SQL knowledge (MariaDB/MySQL/PostgreSQL/Apache Ignite/GridGain) and passion for distributed systems (Raft, MVCC, ACID etc).
• Understands MVCC and P2PL, and the difference between Snapshot Isolation and REPEATABLE READ.

The following may be a strong plus:

• Experience with NoSQL and/or distributed databases.
• Experience with building highload distributed systems and algorithms.
• Experience with Docker, Kubernetes and/or public Cloud (AWS, GCE, Azure, etc).
• Open-source contributions, automation expertise, or performance/load testing.
• Active use of AI.