{"schemaVersion":"jobsearcher.job.v1","id":"dce965f6824c72c974c24ad0","url":"https://jobsearcher.com/jobs/dce965f6824c72c974c24ad0","canonicalUrl":"https://jobsearcher.com/jobs/dce965f6824c72c974c24ad0","title":"Java Developer (Multithreading)","description":"OverviewIn this role, you will build scalable, low-latency Java microservices with a focus on thread safety and high throughput. You will work within a cross-functional team to modernize asynchronous workloads and optimize concurrency patterns. You'll diagnose performance issues, tune memory and garbage collection, and implement resilient threading models for finance/fintech domains. This is a hands-on position that combines core Java, Spring Boot, and multi-threaded architectures to deliver reliable, high-performance systems.Compensation / Benefitsremote workcontract rolecompetitive hourly rateResponsibilitiesDesign and implement ultra-scalable, non-blocking microservices using JavaTune and optimize java.util.concurrent components, thread pools, and locksMove high-load I/O workloads to Java 21 Virtual Threads (Project Loom)Diagnose performance issues with thread dumps, heap dumps, and GC tuningDevelop and maintain RESTful APIs and microservices infrastructureCollaborate with cross-functional teams in an Agile/Scrum environmentDeploy applications using Docker and Kubernetes for multi-environment runtimesEnsure data integrity with proper locking strategies and isolation levelsKey requirementsCore Java expertise in Java 17/21 memory models and synchronization primitivesAdvanced Spring Boot development, including @Async and WebFluxHigh-throughput experience with Kafka or RabbitMQ or similarExperience with relational databases and locking (optimistic/pessimistic)Build and deploy multi-threaded, low-latency Java applicationsFull stack capability: HTML/CSS/JS with React or Angular and server-side Javacollaborationproblem-solvingability to work under pressureJava 17/21Spring BootJava concurrency and synchronization","company":"Apptad","rawCompany":"apptad","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-10-26T13:33:16.733Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Java Developer (Multithreading)","description":"OverviewIn this role, you will build scalable, low-latency Java microservices with a focus on thread safety and high throughput. You will work within a cross-functional team to modernize asynchronous workloads and optimize concurrency patterns. You'll diagnose performance issues, tune memory and garbage collection, and implement resilient threading models for finance/fintech domains. This is a hands-on position that combines core Java, Spring Boot, and multi-threaded architectures to deliver reliable, high-performance systems.Compensation / Benefitsremote workcontract rolecompetitive hourly rateResponsibilitiesDesign and implement ultra-scalable, non-blocking microservices using JavaTune and optimize java.util.concurrent components, thread pools, and locksMove high-load I/O workloads to Java 21 Virtual Threads (Project Loom)Diagnose performance issues with thread dumps, heap dumps, and GC tuningDevelop and maintain RESTful APIs and microservices infrastructureCollaborate with cross-functional teams in an Agile/Scrum environmentDeploy applications using Docker and Kubernetes for multi-environment runtimesEnsure data integrity with proper locking strategies and isolation levelsKey requirementsCore Java expertise in Java 17/21 memory models and synchronization primitivesAdvanced Spring Boot development, including @Async and WebFluxHigh-throughput experience with Kafka or RabbitMQ or similarExperience with relational databases and locking (optimistic/pessimistic)Build and deploy multi-threaded, low-latency Java applicationsFull stack capability: HTML/CSS/JS with React or Angular and server-side Javacollaborationproblem-solvingability to work under pressureJava 17/21Spring BootJava concurrency and synchronization","datePosted":"2026-10-26T13:33:16.733Z","dateModified":"2026-10-26T13:33:16.733Z","hiringOrganization":{"@type":"Organization","name":"Apptad","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"dce965f6824c72c974c24ad0"},"url":"https://jobsearcher.com/jobs/dce965f6824c72c974c24ad0"}}