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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Applications Development Java Programmer... - **Company:** Citigroup, Inc. - **Location:** New Castle, DE, United States - **Experience:** Expert - **Salary:** $107,120.0 - $160,680.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Software Applications, Unit Testing, Cloud Computing, Cloud Engineering, Software Quality, Software Design Patterns, DevOps, Systems Analysis, Enterprise Messaging Systems, MongoDB, NoSQL, OpenShift, Oracle (Applications), Software Architecture, Systems Development Life Cycle, Software Engineering, SQL Databases, Large Language Models, Spring-boot, Mainframe Programming, Core Api, Containerization, Kubernetes, Apache Kafka, Api Design, Software Coding, Restful APIs - **Published:** July 26, 2026 - **Apply:** https://www.juju.com/job/00000000gjhybi ## About the Role 5+ years** **of professional Java Development experience, with significant time spent in a cloud environment. Expert-level proficiency** **in Java, API design, and Cloud engineering principles. Extensive, hands-on experience** **architecting and building RESTful APIs using popular frameworks like Spring and Spring Boot. Deep experience** **with Oracle, SQL, and NoSQL databases such as MongoDB. Proven experience** **with Cloud-native technologies, including OpenShift, Kubernetes, and messaging systems like MQ and Kafka. A strong commitment to and experience in applying** **clean code principles** **and design patterns. In-depth understanding** **and practical application of the software development lifecycle (SDLC) and Agile methodologies. Proven experience** **with DevOps practices and building/maintaining CI/CD pipelines. Demonstrated ability to** **lead projects and work autonomously** **in a fast-paced and rapidly changing environment. Extensive experience in systems analysis and programming of complex software applications. Proven ability to work under pressure and manage deadlines or unexpected changes in expectations or requirements. Recommended Qualifications: Significant experience in the** **Financial domain with a focus on Payments** **is a strong plus. Understanding and practical experience with** **GenAI and LLMs** **is a plus. Experience in** **architecting integrations** **for mainframe applications with Kafka or APIs is a plus. Subject Matter Expert (SME)** **in at least one critical area of Applications Development. Demonstrated ability to adjust priorities and strategy quickly as circumstances dictate. Proven leadership, mentorship, and project management skills. Consistently demonstrates clear, concise, and influential written and verbal communication. Education: Bachelor's degree/University degree or equivalent experience Master's degree preferred ## Description This is a hands-on technical developer role for a Applications Development Java Programmer. The position requires expert-level hands-on coding and development in Java of new or revised application systems and programs. The successful candidate will develop and code for complex requirements following architectural and industry best practices. Responsibilities: Core Development & Technical Leadership Lead the design, development, and maintenance of efficient, reusable, and reliable Java code for high-volume, low-latency applications. Own and drive all phases of the development lifecycle, from technical specification to testing and deployment. Architect and write well-designed, testable, and scalable code, setting the standard for software development best practices within the team. Ensure and take ownership of the optimal performance, quality, and responsiveness of the applications. Analysis, Design & Architecture Lead the analysis of complex user requirements to define business objectives and architect robust technical solutions. Drive architectural and design discussions, making key technical decisions to ensure robust and scalable solutions. Create and own detailed technical specifications and software architecture documents. Identify, evaluate, and champion the adoption of new technologies and frameworks to enhance the application stack. Unit Testing & Code Quality Define and implement comprehensive testing strategies, including unit, integration, and performance tests to ensure code quality and reliability. Do peer code reviews, enforcing high standards of code quality and providing constructive feedback to the team. Drive continuous improvement by investigating and implementing cutting-edge technologies and presenting them for architectural review. Maintenance & Support Ownership and accountability of the code that is delivered including problem solving during any production issues. Provide expert-level technical support for applications in production, leading the resolution of critical issues in a timely manner. Collaboration & Documentation Collaborate with and influence cross-functional teams, including business analysts, project managers, and other senior developers, to deliver high-quality software. Establish and enforce standards for documenting software functionality, processes, and technical specifications. 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