Top Java Developer Jobs in Hartford, CT

The Front End Java Developer will design, develop, and enhance multi-tier web applications using AngularJS, jQuery, and SQL while meeting business requirements.

Develop, migrate, and maintain Java/J2EE applications using Agile and DevOps practices to implement Okta authentication. Collaborate with stakeholders to gather requirements, create migration and test plans, perform testing, and leverage DevOps toolchains to build, deploy, and secure applications for DOJ/ATF customers.

Develop and maintain high-performance Java applications, work on web and mobile applications, and collaborate in Agile/Scrum teams.

As a Junior Java Developer, you will design and develop web components, perform testing, manage software deployment, and enhance existing code.

Design, develop, test, and deploy full-stack Java applications (backend Java/Spring Boot, frontend React/Angular, PostgreSQL). Lead architecture decisions, mentor developers, perform code reviews, troubleshoot issues, implement testing strategies (JUnit, Cypress, Playwright), collaborate with product/QA/DevOps in Agile, and support VA mission-critical initiatives while meeting security and clearance requirements.

Develop Java backend systems and build JavaScript front-end applications (Backbone/Marionette/Handlebars or modern frameworks). Implement responsive HTML5/CSS3 UIs, use NodeJS-based build tools (Grunt/Gulp,SASS,Yeoman,NPM/JSPM), perform requirements elicitation in Agile/global delivery, collaborate with stakeholders, and apply insurance domain knowledge.

Develop and maintain Java solutions using MarkLogic and XQuery. Work with Hadoop (Hive, Pig), ETL/ELT frameworks, NoSQL and DW/BI systems. Perform design, architecture reviews, UNIX/Linux scripting, troubleshooting, and support global delivery teams in the financial domain.

Design and implement server-side components and web services, convert wireframes to prototypes, collaborate with UX, analysts and architects, and deliver applications using Agile and iterative SDLC.

Design, build, and maintain scalable Java/Spring Boot backend services; implement event-driven systems with Kafka (producers/consumers, stream processing); design and optimize caching with Redis and in-memory strategies; perform performance tuning and bottleneck analysis; take end-to-end ownership of components, debug production issues, and collaborate in fast-paced environments while enforcing code quality and reusable designs.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Design, build, and maintain server-side Java applications and RESTful APIs. Optimize performance and scalability, ensure security, collaborate with cross-functional teams, perform code reviews, troubleshoot production issues, and document system architecture.

Reverse-engineer TIBCO BW/MFT processes to extract business logic, then design and implement a modular Java/Spring Boot microservices replacement. Migrate protocols to Kafka/RabbitMQ/REST, translate XML transformations, ensure data persistence and consistency, and validate performance to meet existing SLAs.

Design, build, and maintain Java/J2EE multi-layer applications and APIs. Collaborate with architects and DevOps to implement CI/CD, code quality, testing, and database solutions (DB2/Oracle, PL/SQL). Support cross-team delivery, resolve technical roadblocks, and drive process improvements in an asset management/financial services context.

Analyze legacy TIBCO BusinessWorks/MFT processes to extract business logic, design and build a decoupled Java/Spring Boot microservices platform, migrate protocols to Kafka/RabbitMQ/REST, translate XML-heavy transformations to modern formats, and validate performance and SLAs to match legacy throughput.

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.

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 migration of legacy COBOL systems to Java-based microservices and develop scalable, secure full-stack solutions on Azure. Build RESTful APIs, optimize performance, ensure DoD cybersecurity compliance, collaborate across teams, document architectures, and participate in Agile ceremonies.

Develop and maintain Java applications using Spring Boot and Spring Batch. Design and integrate microservices, build secure high-performance REST/OData APIs, write JUnit tests, ensure code quality, and optimize SQL database queries.

Design, build, and deploy secure, high-performance, scalable cloud-native applications supporting Ariba P2P. Work full-stack in Java using Spring Boot and the SAP BTP Cloud Foundry CAP (Java) model, applying resiliency, security, and performance best practices.

Develop and maintain Java Spring Boot services with multithreading and Spring Batch. Build OData/REST APIs, write high-coverage JUnit tests, and author SQL queries. Ensure robust exception handling and code quality; collaborate on automation and UI work where needed.

Develop and maintain backend services for an MDM platform using Java, Spring Boot, and REST APIs. Build data ingestion, transformation, and integration pipelines, apply observability and testing best practices, optimize performance, and use AI-assisted tools to accelerate development. Collaborate in Agile teams across frontend, QA, product, and platform.

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.

As a Principal Software Data Engineer, you'll lead the design, development, and optimization of large-scale data platforms and pipelines, ensuring data governance and driving innovation in a collaborative environment.

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.