Apps Dev Tech Lead Analyst

Citibank (Switzerland) AG; Mississauga; Hybrid; Confidential; Full time

Job summary

Citibank (Switzerland) AG is seeking a senior backend developer to design, build, and deploy asynchronous Java microservices. You will work with MongoDB and Elasticsearch, implement Kafka-based streaming, and apply TDD with JUnit to ensure high code quality.

Collaboration with product teams and frontline developers is essential. The role emphasizes scalable architectures, cloud readiness, and strong problem-solving skills.

Qualifications

• Strong proficiency in Java (Java 8+).
• Experience designing and implementing asynchronous, event-based microservices.
• Hands-on with Java Lambdas and Reactive Programming frameworks (Spring WebFlux, Reactor, RxJava).
• NoSQL: MongoDB experience.
• Elasticsearch proficiency for search/analytics.
• Apache Kafka for event streaming and messaging.
• JUnit and TDD for unit testing and quality assurance.
• Git and collaborative workflows (PRs, GitFlow).
• Familiarity with CI/CD pipelines.

Responsibilities

• Design, develop, and deploy asynchronous, event-driven microservices using Java.
• Implement solutions leveraging Java Lambdas and Reactive Programming.
• Work with MongoDB for data storage and retrieval.
• Utilize Elasticsearch for search and analytics.
• Integrate and develop Kafka-based event streaming solutions.
• Maintain high code quality with JUnit tests and TDD.
• Collaborate with frontend, product managers, and stakeholders to deliver features.
• Participate in code reviews to ensure quality and best practices.
• Troubleshoot and resolve production issues with timely resolutions.
• Contribute to continuous improvement of development processes, tools, and methodologies.
• Stay up-to-date with backend trends and technologies.
• Coordinate with multiple management teams to integrate functions and deploy enhancements.

Skills

Java 8+

Microservices

Reactive programming

MongoDB

Elasticsearch

Kafka

JUnit

Git

CI/CD

Docker

Kubernetes

REST API

Cloud platforms

Education

Bachelor's degree

Master's degree

Tools

Spring WebFlux

RxJava

Job description

Responsibilities

• 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.

Required Skills and Experience

• Languages & Frameworks: Strong proficiency in Java (Java 8+), with extensive experience in building scalable backend applications.


• Microservices: Experience with designing and implementing asynchronous, event-based microservices architectures.


• Functional & Reactive Programming: Hands-on experience with Java Lambdas and Reactive Programming frameworks (e.g., Spring WebFlux, Reactor, RxJava).


• Databases: NoSQL: Strong experience with MongoDB.


• Search & Analytics: Proficiency with Elasticsearch.


• Messaging & Streaming: Solid experience with Apache Kafka for event streaming and messaging.


• Development Practices Testing: Expert-level understanding and practical application of JUnit for unit testing and Test-Driven Development (TDD).


• Version Control: Proficient with Git and collaborative development workflows (e.g., Pull Requests, GitFlow).


• CI/CD: Familiarity with continuous integration and continuous deployment pipelines.

Recommended Qualifications

• 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.


• 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.

Education

• Bachelor's degree/University degree or equivalent experience


• Master's degree preferred

This job description provides a high-level review of the types of work performed.

Other job-related duties may be assigned as required.

Strong understanding of data structures, algorithms, and object-oriented design principles.

Experience with RESTful API design and development.

Familiarity with cloud platforms (e.g., AWS, Azure, GCP) is a plus.

Excellent problem-solving, analytical, and debugging skills.

Ability to work independently and as part of a collaborative team.

Job Family Group: Technology

Job Family: Applications Development

Time Type: Full time

Primary Location Full Time Salary Range: $120,800.00 - $170,800.00

Automated Processing and AI We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi. Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

This job opening is for an existing job vacancy.

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