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Citi Logo Citi · IT - Software Development

Apps Dev Tech Lead Analyst

Canada, Mississauga Employment contract 120800.00 - 170800.00 USD / Year · Job Posted June 01, 2026
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Job Description

We are seeking a highly skilled and experienced Backend Java Developer to join our dynamic engineering team. The ideal candidate will be responsible for designing, developing, and maintaining scalable, high-performance, and resilient backend services. This role involves working with a modern technology stack focused on asynchronous, event-based microservices, reactive programming, and robust data persistence solutions. A strong commitment to quality through Test-Driven Development (TDD) and comprehensive unit testing is essential.

Job Responsibility

  • Design, develop, and deploy asynchronous, event-driven microservices using Java
  • Implement solutions leveraging Java Lambdas and Reactive Functional Programming paradigms
  • Work with NoSQL databases, specifically MongoDB, for efficient data storage and retrieval
  • Utilize Elasticsearch for building powerful search and analytics capabilities
  • Integrate and develop event streaming solutions with Apache Kafka
  • Ensure high code quality through adherence to Test-Driven Development (TDD) principles and writing thorough JUnit tests
  • Collaborate with frontend developers, product managers, and other stakeholders to define and deliver features
  • Participate in code reviews to maintain code quality, share knowledge, and ensure best practices
  • Troubleshoot and debug production issues, providing timely resolutions
  • Contribute to the continuous improvement of our development processes, tools, and methodologies
  • Stay up-to-date with emerging trends and technologies in backend development
  • Partner with multiple management teams to ensure appropriate integration of functions to meet goals as well as identify and define necessary system enhancements to deploy new products and process improvements
  • Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
  • Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
  • Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
  • Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
  • Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
  • Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary
  • Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency

Requirements

  • Strong proficiency in Java (Java 8+)
  • Extensive experience in building scalable backend applications
  • Experience with designing and implementing asynchronous, event-based microservices architectures
  • Hands-on experience with Java Lambdas and Reactive Programming frameworks (e.g., Spring WebFlux, Reactor, RxJava)
  • Strong experience with MongoDB
  • Proficiency with Elasticsearch
  • Solid experience with Apache Kafka for event streaming and messaging
  • Expert-level understanding and practical application of JUnit for unit testing and Test-Driven Development (TDD)
  • Proficient with Git and collaborative development workflows
  • Familiarity with continuous integration and continuous deployment pipelines
  • 6-10 years of relevant experience in Apps Development or systems analysis role
  • Extensive experience system analysis and in programming of software applications
  • Experience in managing and implementing successful projects
  • Subject Matter Expert (SME) in at least one area of Applications Development
  • Ability to adjust priorities quickly as circumstances dictate
  • Demonstrated leadership and project management skills
  • Consistently demonstrates clear and concise written and verbal communication
  • Bachelor's or Master's degree in Computer Science, Engineering, or a related field
  • Strong understanding of data structures, algorithms, and object-oriented design principles
  • Experience with RESTful API design and development
  • Excellent problem-solving, analytical, and debugging skills
  • Ability to work independently and as part of a collaborative team

Nice to have

  • Experience with Docker and Kubernetes for containerization and orchestration
  • Knowledge of other NoSQL databases
  • Contributions to open-source projects
  • Experience in a fast-paced, agile development environment
  • Familiarity with cloud platforms (e.g., AWS, Azure, GCP)
  • Master's degree preferred
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