Lead Full Stack Java Developer

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

This team supports and develops key applications globally using the most UpToDate technologies combining it with the ones already proved.

You can work with people in many regions while based in Dublin.

This role will be responsible for designing, developing, and maintaining scalable Java applications with future focus on AI/ML integration on new or revised application systems and programs in coordination with the Technology Team.

Roles and Responsibilities

• Responsible for design and leading development as a full stack java to build very high-volume, low-latency enterprise applications that can adapt and scale to changing market conditions

• Understanding the impact of adapting different architectures and designs and present the same to all relevant stakeholders.

• Management of both functional and technical requirements while deciding on technical solutions.

• Development of solutions following established technical design, application development standards and quality processes in projects.

• Understanding the client requirements and envision the solution that can be captured as respective user stories in JIRA.

• Work with large datasets and develop efficient algorithms for data processing and analysis

• Collaborate with cross-functional teams to identify and prioritize project requirements

• Implement AI/ML models using popular frameworks and libraries

• Ensure high-quality code delivery with robust testing and validation

• Work with Production Service/Support to resolve issues

• Stay up to date with new development tools and strategies

Qualifications:

• 6-10 years of experience as a Senior Java Developer with hands on end-to-end solutions.

• Java 8+ with strong expertise in Spring, Hibernate, and Java-based frameworks.

• Expert in Java microservice based architecture and REST APIs.

• Knowledge in data processing and storage solutions like Apache Hadoop, Spark, and/or NoSQL databases

• Experience in working with in memory database and cache like Redis.

• Strong understanding of data structures, algorithms, and software design patterns

• Fluency in English

• Excellent verbal and written communication skills, enabling effective collaboration with cross-functional teams, stakeholders, and management

• Proven ability to effectively use complex analytical, interpretive and problem-solving techniques and execute plan

• Passion and commitment for process and design simplification

Preferred skills:

• Experience with popular AI/ML libraries like LangChain4j or Spring AI

• Knowledge of Redis Vector DB or Elasticsearch for efficient data retrieval

• Experience with cloud platforms like AWS, Azure, or Google Cloud

• Familiarity with Agile development methodologies and version control systems like Git

• Familiarity with AI/ML technologies, including:

  • Machine Learning frameworks like Weka, Deeplearning4j, or TensorFlow Java API

  • Deep Learning architectures like CNNs, RNNs, or Transformers

  • Natural Language Processing (NLP) techniques and libraries like Stanford CoreNLP or OpenNLP

Education:

• Bachelor’s degree/University degree or equivalent experience

• Master’s degree preferred

What we can offer you:

By joining Citi Dublin, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed) and enjoy a whole host of additional benefits that support you (and your family) to be well, live well and save well. Discover more here.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self every day. We want the best talent around the world to be energized to join us, motivated to stay, and empowered to thrive.

Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.

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