Top Java Developer Jobs in Hartford, CT

Investigate and resolve data-quality issues in large-scale distributed systems. Design Java-based repair pipelines and idempotent correction jobs for high-volume datasets, debug existing code, use AWS services for queue-driven and batch workflows, optimize performance and concurrency, and communicate technical findings and risks to stakeholders.

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.

Designs, implements, and runs Java Spring Boot microservices and REST APIs; leads design, CI/CD, TDD, performance tuning, security, and cross-product collaboration. Coaches teams and owns product KPIs and production support.

Design and develop scalable software solutions, lead architecture discussions, troubleshoot issues, and mentor team members while applying best engineering practices.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Design, develop, and maintain web-based UI and REST middleware for federal health IT systems. Participate in Agile/SAFe ceremonies, write design documents, implement features, resolve bugs, and support CI/CD pipelines while collaborating with product, QA, and stakeholders.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

Develop and maintain ATG/Java J2EE applications. Implement XML/HTTP/REST web services, front-end features with jQuery/AngularJS, and backend layers using Struts, Spring, Hibernate, WebLogic, Oracle DB, JDBC/PLSQL. Work across the SDLC, design microservices, integrate RabbitMQ, leverage AWS, collaborate with stakeholders, and troubleshoot complex issues. May include iOS/Swift tasks.

Senior Java developer responsible for designing and building web/internet applications using Java/J2EE. Work includes OOA/OOD, distributed and real-time systems, databases and messaging, implementing design patterns and algorithms, TDD/agile practices, rich UI frameworks, Spring/Hibernate-based backends, SOA/Web Services, CI/CD and automation, and developing APIs and application frameworks.

Design, build, and support cloud-native full stack or backend Java products using TDD, CI/CD, microservices and event-driven patterns. Collaborate with product teams, provide production support, implement monitoring and ensure secure, performant systems.

Design, build, and maintain scalable J2EE business applications. Implement features, fix bugs, participate in code reviews, automate tests, optimize performance, and produce documentation.

Lead backend Java development and architecture for enterprise applications. Design and deliver scalable, resilient microservices and APIs, mentor developers, lead technical decisions, support production incidents, and implement CI/CD and cloud-native solutions on AWS.

Design, develop, and maintain Java-based backend services and APIs for KeeperApp. Own backend components, optimize MySQL schemas/queries, ensure performance and reliability, apply secure coding practices, participate in code reviews, and collaborate with product and engineering teams to deliver features iteratively.

Lead design, development, testing, and maintenance of enterprise Java microservices and front-end applications. Build APIs, CI/CD pipelines, and containerized deployments; troubleshoot production, ensure security/compliance, mentor junior developers, and collaborate within Agile teams.

Build and deliver backend enterprise web applications for Citi's Integrated Digital Assets Platform using Java/Spring and web3 technologies. Collaborate with distributed teams, follow best practices and design patterns, write technical documentation, resolve issues, and ensure scalability, reliability, and performance.

Design, build, and maintain secure, high-performance RESTful APIs and microservices using Java and Spring Boot. Collaborate with cross-functional teams, implement API security (OAuth2/JWT/OpenID Connect), optimize databases, integrate messaging systems, write unit/integration/API tests, participate in code reviews and architecture decisions, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

Lead architecture and delivery of enterprise Java full-stack applications. Hands-on development with Java/Spring Boot, microservices, AWS cloud-native services, database tuning (Oracle/RDS), CI/CD pipelines, monitoring, and incident resolution. Mentor engineers, enforce code quality, run architectural reviews, and collaborate with product, DevOps, and security teams to ensure scalable, secure, high-availability solutions.

Design, build, and maintain scalable enterprise full-stack applications using Java, Spring Boot, microservices, and modern front-end frameworks. Implement cloud-based solutions on AWS, contribute to CI/CD and DevOps automation, optimize performance and security, and integrate AI-driven capabilities using Python and orchestration tools like LangChain and LangGraph.

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.

Develop and implement Java/J2EE server-side applications using Spring and Hibernate; design REST/SOAP web services; write PL/SQL; translate functional requirements to system specifications; use Eclipse/ANT and version control; work within the telecom domain.

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.

Develop and implement Java/J2EE applications using Spring and Hibernate; build REST and SOAP web services within an SOA; perform server-side programming (Servlets, JSP, JDBC, EJB); write PL/SQL; use build and dev tools (Eclipse, RAD, Ant, SoapUI, SVN/CVS); work in the telecom domain.

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, maintain, and optimize backend services and APIs for a scalable healthcare platform using Node.js, Java, or .NET. Integrate third-party services, ensure performance, reliability, and security, collaborate with cross-functional teams, participate in code reviews, and work in an Agile environment to deliver high-quality server-side applications.

Design, build, and maintain scalable Java Spring Boot microservices and REST APIs. Deploy and operate cloud-native applications on GCP, implement CI/CD, optimize performance and databases, ensure security and reliability, collaborate with cross-functional teams, and troubleshoot production issues.