Senior Java Backend Architect - Real-Time Microservices

Citi; New York (NY); Hybrid; USD 121,000 - 171,000; Full time

Job summary

Citi in Mississauga, Ontario, Canada is hiring a Lead Core Backend Developer to advance our Java server and microservices platform. You’ll work on high-performance, low-latency systems used in electronic trading, collaborating with a global team.

The role exposes you to modern tech, real-time messaging, and scalable architectures, with a strong emphasis on design, testing, and production readiness.

Qualifications

• 8+ years of strong hands-on development experience using Java including expertise with Spring or another dependency injection framework.
• 5+ years’ experience in developing and maintaining highly scalable, real-time, low latency, high-volume, scalable microservices.
• Experience with real-time messaging middleware (Kafka, RabbitMQ, Solace, Tibco, …)
• Experience working with multi-threaded applications
• Strong software development fundamentals, data structures, design patterns, Object-Oriented programming, architecture, algorithms, and problem-solving skills
• Application deployment and debugging of applications on UNIX/LINUX

Responsibilities

• Understanding of good design principles and ability to adhere to complex design
• Development of common, reusable components and services utilizing Citi’s best practices
• Responsible for creating high performance, low latency applications leveraging existing Citi framework
• Ensuring strong reliability, scalability and performance of our components
• Apply an engineering mind-set to development work: understand use-cases in details, develop metrics to build good estimates of volume and compute velocity requirements
• Contribute actively to system design decisions
• Evaluate and build POCs for new strategic initiatives and work to convert to industrial level solutions
• Provide post release assistance to business, development and support groups
• Develop application as per best practice and remain compliant with prescribed best practices (TDD, maintain high unit test coverage, CI…)
• Assisting in third line support during core trading hours

Skills

Java

Spring

Microservices

Multithreading

Remote messaging

Design patterns

Data structures

OO design

Education

Bachelor's degree

Tools

CI/CD pipelines

Oracle

MongoDB

Redis

Job description

Citi in Mississauga, Ontario, Canada is hiring a Lead Core Backend Developer to advance our Java server and microservices platform. You’ll work on high-performance, low-latency systems used in electronic trading, collaborating with a global team.

The role exposes you to modern tech, real-time messaging, and scalable architectures, with a strong emphasis on design, testing, and production readiness.