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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Java Engineer (Core) - **Company:** Hazelcast, Inc. - **Location:** San Mateo, CA, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Adobe InDesign, Application Programming Interfaces (APIs), Computer Clusters, Code Review, Databases, Data Distribution Service, Serialization, Software Debugging, Distributed Data Store, Distributed Systems, Fraud Prevention and Detection, Hazelcast, Java Virtual Machine (JVM), Enterprise Messaging Systems, Open Source Technology, Software Engineering, Data Processing, Multithreading, Data Storage Technologies, Concurrency, Backend, Real Time Data, Stream Processing - **Published:** August 19, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pda0dn467n ## About the Role You're a strong Java engineer who enjoys building complex backend systems and understanding how they behave in production. Must have * Strong proficiency in Java and the JVM ecosystem * Experience building backend platforms or complex systems * Solid understanding of concurrency and multithreaded programming * Experience designing reliable system components and APIs * Ability to debug and reason about complex production systems Nice to have * Experience with distributed data systems, messaging systems or databases * Familiarity with replication, partitioning or distributed coordination * Experience with networking, serialization or storage internals * Experience profiling and optimizing latency-sensitive code paths * Contributions to open-source systems or developer platforms ## Description At Hazelcast, we build a high-performance real-time data platform used in mission-critical systems across industries such as finance, e-commerce and telecoms. Our platform enables applications to access and process data in milliseconds, powering use cases like fraud detection, real-time inventory tracking and dynamic pricing., We're looking for a senior Java software development engineer to join the Core team, the group responsible for the engine at the heart of the Hazelcast Platform. This distributed, Java-based system combines low-latency data storage, in-place compute and stream processing across clusters of machines. This role is ideal for engineers who enjoy building core backend systems and working on the mechanics of distributed platforms, such as concurrency, coordination, data distribution and behaviour under load, failure and changing cluster topology. What You'll Do Build the runtime engine Design, implement and evolve core components of the Hazelcast runtime, including cluster services, distributed data structures and execution engines. Work on distributed systems problems Contribute to mechanisms for partitioning, replication, coordination and recovery in a distributed cluster. Develop production systems Write clean, well-tested Java code for long-running clustered systems that must remain reliable, observable and predictable in production. Contribute to architecture Collaborate with experienced engineers and architects to shape the design and evolution of the platform's core runtime. Raise the Engineering Bar Participate in design discussions, code reviews and mentoring to maintain the high standards of the Core team. ## Related Videos - [Enterprise-Cloud-Native - Fast-Paced Development & Deployment in a Highly Secure Banking Environment](https://www.wearedevelopers.com/videos/671-enterprise-cloud-native-fast-paced-development-deployment-in-a-highly-secure-banking-environment) - [Build ultra-fast In-Memory Database Apps and Microservices with Java ](https://www.wearedevelopers.com/videos/405-build-ultra-fast-in-memory-database-apps-and-microservices-with-java) - [Kubernetes and Microservices with Multi-Model Databases](https://www.wearedevelopers.com/videos/382-kubernetes-and-microservices-with-multi-model-databases) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Fault Tolerance and Consistency at Scale: Harnessing the Power of Distributed SQL Databases](https://www.wearedevelopers.com/videos/1146-fault-tolerance-and-consistency-at-scale-harnessing-the-power-of-distributed-sql-databases) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries) - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers)