Senior Java Developer

Citigroup

  • Mississauga, ON
  • Permanent
  • Full-time
  • 21 hours ago
Project OverviewThis role is part of an initiative to build a real-time data pipeline for processing front-office markets chat data. The system will ingest unstructured messages from trading and sales desks, invoke NLP Engine APIs to extract intent and entities, and transform the results into structured objects. These outputs will power downstream use cases such as trade analytics, trade processing, pricing, risk management, and compliance monitoring. The solution leverages Java, Spring Boot, Elasticsearch, Oracle, Kafka, and caching frameworks to ensure scalability, low latency, and high reliability in mission-critical trading environments.Position OverviewWe are seeking an experienced Senior Java Developer to design and build scalable, high-performance applications for real-time data processing. The ideal candidate will have strong expertise in Java, Spring Boot, Elasticsearch, Oracle, Kafka, and caching frameworks (Redis or similar). In addition, the candidate should be comfortable leveraging Generative AI coding tools (e.g., GitHub Copilot, Gemini, etc.) to accelerate development, improve productivity, and ensure code quality. You will play a key role in architecting and developing robust solutions, and collaborating with business and technology teams to ensure system efficiency and reliability.Responsibilities:Design, develop, and maintain high-performance Java applications for processing front-office chat data in real time.Implement config-driven, Spring-based components for data ingestion, transformation, and enrichment.Develop and optimize REST APIs for integration with NLP engines, internal systems, and external applications.Integrate and manage Apache Kafka for high-throughput, low-latency event streaming.Utilize Elasticsearch for efficient indexing and querying of large chat-derived datasets.Write optimized Oracle SQL/PLSQL for configuration management.Leverage continuous integration pipelines to streamline development and deployment.Use Generative AI development tools (e.g., Copilot, Gemini etc) to write, review, and optimize code efficiently.Collaborate with business analysts, product team and developers to ensure system reliability, scalability, and alignment with regulatory requirements.Qualifications:6-10 years of professional experience in Java application development.Expertise in Spring Boot and microservices architecture.Strong experience with Elasticsearch (indexing, queries, aggregations).Hands-on experience with Apache Kafka (publish/subscribe, streams, scalability).Proficiency in Oracle Database (SQL, PL/SQL, optimization).Experience with caching frameworks (Redis or equivalent).Ability to effectively leverage Generative AI coding assistants for improved development productivity.Knowledge of real-time data processing and data pipeline design.Familiarity with NLP APIs and integrating external ML/AI services is a plusUnderstanding of distributed systems, concurrency, and performance tuning.Soft Skills
  • Strong problem-solving and analytical skills.
  • Excellent communication and ability to work across global teams.
  • Proven ability to collaborate under the guidance of other lead developers
  • Ownership mindset with a focus on delivering high-quality solutions.
Education
  • Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.Job Family Group: TechnologyJob Family: Applications DevelopmentTime Type: Full timeMost Relevant Skills Please see the requirements listed above.Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review .View Citi’s and the poster.

Citigroup