Java Senior Software Engineer

September 24, 2026

Remote

Senior

Serbia, Georgia, Croatia, Estonia, Finland, Italy, Poland, Romania, Spain, Armenia, Cyprus

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English is required

Description

The company is looking for a Java Senior Software Engineer to lead the development of a highly scalable, geo-distributed and high-performance database solution. The role involves deep work on replication, sharding, concurrency and performance optimization, as well as managing a small team of software engineers. You will collaborate globally, contribute to open source and work with both on-premise and cloud-based environments. The position is remote from a defined list of European and Asian countries.

Responsibilities

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
Keep code clean and reviewable with Git
Develop and optimize data structures for 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
Implement and integrate algorithms for high availability of the whole cluster
Investigate flaws in data consistency algorithms with debugging on multi-node clusters and low-level byte-represented data
Manage a number of Software Engineers on the project

Requirements

4+ years of experience in Java programming
Deep knowledge of concurrency in Java, the Java Memory Model and concurrency models in other programming systems
Excellent Java SE knowledge including IO and JVM internals
Experience with SQL databases
Experience troubleshooting Java applications and/or databases
Excellent leadership, problem-solving and debugging skills
Experience working effectively in fast-paced collaborative environments
Deep SQL knowledge (MariaDB/MySQL/PostgreSQL/Apache Ignite/GridGain) and passion for distributed systems (Raft, MVCC, ACID)
Understanding of MVCC and P2PL and the difference between Snapshot Isolation and REPEATABLE READ
Experience with NoSQL and/or distributed databases
Experience building highload distributed systems and algorithms
Experience with Docker, Kubernetes and/or public cloud (AWS, GCE, Azure)
Open-source contributions, automation expertise or performance/load testing experience
Active use of AI

Conditions

Remote work with remote or hybrid options depending on location
Competitive pay
25 days paid annual leave plus public holidays
Globally distributed team and clean engineering culture
Equal opportunity employer providing accommodations for disabilities during the application and interview process

JavaSQLJava SEConcurrencyJava Memory ModelMariaDBMySQLPostgreSQLApache IgniteGridGainRaftMVCCACIDGitJVMJFRJMCasync-profilerVisualVMdatabasesNoSQLDockerKubernetes

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