Top Senior Java Developer Jobs in Jacksonville, FL

Design, develop, test, and deploy Java/J2EE applications and integrations. Lead implementation planning, gather and specify requirements, mentor junior developers, resolve defects, support production (on-call), and ensure database and SOX-compliant process documentation.

Develop and maintain technology solutions, lead complex projects, consult junior staff, analyze client requirements, and oversee project deliverables for compliance.

The role involves application development, managing system implementation, conducting feasibility studies, and providing user support while ensuring compliance and standards.

Lead complex enterprise application development and platform modernization. Design and implement resilient, observable features; troubleshoot and resolve high-impact production incidents; enforce coding and SDLC standards; mentor mid-level engineers; collaborate with business and architecture teams; maintain documentation and ensure regulatory compliance.

Lead architecture and implementation of scalable, fault-tolerant Java microservices and RESTful APIs. Mentor developers, drive coding standards, conduct code reviews, ensure inter-service communication (REST and messaging queues), and collaborate with architecture, infrastructure, and product teams to deliver production-grade services and CI/CD-enabled deployments.

The Senior Full Stack Java Developer will design and maintain enterprise applications using Java and modern front-end technologies while collaborating in Agile teams and mentoring junior developers.

Lead the development and implementation of application systems, coordinate with management, design microservices, and provide development expertise.

The role involves building backend services for advisor productivity, integrating data sources, designing APIs, and contributing to both backend and frontend development in a greenfield project.

As a Senior Full Stack Engineer, you'll design, build, and support robust platform solutions while integrating front-end components with back-end systems, managing CI/CD pipelines, and automating infrastructure.

Lead design and delivery of scalable, resilient distributed systems. Act as technical authority across teams, mentor engineers, drive architecture and CI/CD best practices, troubleshoot production issues, optimize performance, and enhance observability while writing production-grade Java.

The role involves utilizing programming skills in Java and JavaScript frameworks, leading teams, and solving complex client challenges while using modern development tools and agile methodologies.

The Senior Java Developer will design, develop, and implement custom software solutions in Agile teams, mentor juniors, and ensure product quality.

Optimize and scale blockchain node performance, design and implement core system plugins, collaborate with cross-functional teams, conduct performance testing and debugging, and stay current on blockchain and distributed systems technologies to maintain reliable infrastructure.

Develop and maintain Java backend services for enterprise blockchain applications, integrate APIs with React/Vue frontends, design scalable blockchain solutions, troubleshoot complex backend issues, and collaborate with the team to apply best practices and stay current with blockchain trends.

Design, develop and operate microservice-based components for a derivatives exchange platform. Collaborate with product, security and DevOps teams to build scalable, secure back-end systems with automated testing, CI/CD, and rapid deployment. Participate in code audits, testing, release, and cross-stack problem solving; optimize and implement trading models and products.

The Senior Software Engineer will develop and maintain big data applications, focusing on distributed computing, automation, and collaboration with teams to enhance healthcare solutions.

As a Java Software Engineer III, you will design, develop, and maintain scalable Java-based backend services, mentor other engineers, and influence architectural decisions in an agile environment.

The Full Stack Developer designs and codes scalable solutions, influences architecture, collaborates with stakeholders, and promotes technical excellence in the insurance claim domain.

As a Senior Developer, you will modernize COBOL systems to Java, enhancing functionality and performance while collaborating with stakeholders and ensuring coding standards are met.

As a Senior Software Engineer, you will build cloud solutions, define migration strategies, mentor junior engineers, and ensure architectural integrity while collaborating with peers.

The Product Engineer designs and implements digital products using modern technologies, manages production applications, and coaches teams in agile practices.

The role involves improving Elasticsearch's distributed components, maintaining cluster coordination systems, and addressing complex issues to optimize performance and scalability.

The Senior Java Full Stack Developer will design and implement enterprise-grade applications using Java, Spring Boot, and modern frontend frameworks, while overseeing the full software development lifecycle and providing technical guidance.

Design, implement, test, and maintain full‑stack features and services for the Cayuse Research Platform. Drive architecture, prototypes, and technical debt reduction while practicing TDD, expanding automated QA, collaborating cross‑functionally, and ensuring high quality delivery in an Agile environment.

The Senior Software Engineer at Ensono will design, develop, and maintain enterprise Java applications, handle technical analyses, manage middleware configurations, and implement DevOps practices.