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Lead Software Engineer

Job in Mississauga, Ontario, Canada
Listing for: Citigroup Inc.
Full Time position
Listed on 2026-07-21
Job specializations:
  • Software Development
    Backend Developer, Java Developer, DevOps, Cloud Engineer - Software
Job Description & How to Apply Below
The Role
Join the Citi Futures Technology team, a dynamic and fast‑paced group at the heart of a growing global business. We are seeking a talented Senior Java Engineer to drive the architecture, design, and implementation of our Futures Data as a Service post‑trade orders & executions application.

This is a hands‑on role where you will tackle complex technical challenges in a low‑latency, high‑throughput environment. You will play a key role in building resilient and high‑performing scalable solutions that directly impact our trade consumption, enrichment and reporting.

What You'll Do (Responsibilities)

Architect & Develop:  Architect, design, build, and maintain high‑performance, scalable, and reliable Java‑based microservices.

Solve Complex Problems:  Tackle challenging technical problems related to concurrency, low‑latency messaging, and large‑scale data processing in a distributed environment.

Collaborate & Integrate:  Work within a global Agile team to analyze complex business requirements, collaborating with traders, product managers and other key business stakeholders to deliver elegant and effective technical solutions.

Champion Best Practices:  Uphold and contribute to our high standards for code quality, automated testing (unit, integration and regression), code reviews, and CI/CD practices.

Modernize Our Technology Stack:  Drive the evolution of our platform by leveraging modern technologies like Kafka, Docker, and Open Shift, and contribute to the strategic transformation of our architecture.

Mentor & Lead:  Serve as a technical advisor and coach to mid‑level and senior developers and analysts, fostering a culture of technical excellence and continuous improvement.

Ensure System Resiliency:  Take ownership of the full development lifecycle, from Architecture, design and implementation to deployment and operational support, ensuring the stability and integrity of our production environment.

Risk & Compliance:  Appropriately assess risk when business decisions are made, demonstrating consideration for the firm's reputation and safeguarding Citigroup, its clients and assets. You will drive compliance with applicable laws, rules and regulations, apply sound ethical judgment, and elevate control issues with transparency.

Our Tech Stack

Server OS:  Red Hat Enterprise Linux

Backend:  Java (17+), Spring Boot, REST APIs, Microservices

Messaging:  Apache Kafka, Solace and Tibco

Databases:  Microsoft SQL Server, MongoDB

Dev Ops & CI/CD:  Git, Jenkins, Team City, Tekton, uDeploy, Harness, Maven/Gradle

Container & Cloud:  Docker, Kubernetes, Red Hat Open Shift

What We’re Looking For (Qualifications)
Required

Experience:

8+ years of professional experience in a hands‑on software architecture, design and development role.

Core Java Expertise:  Deep, demonstrable knowledge of server‑side Java, including multi‑threading, performance tuning and building robust, scalable applications.

System Architecture & Design:  Proven experience in architecting, designing and implementing complex, distributed systems and cloud microservices.

Database Proficiency:  Strong expertise with relational databases, including data modeling, query optimization and performance tuning.

Messaging Systems:  Hands‑on experience with high‑throughput messaging platforms, specifically Kafka and Solace.

CI/CD & Dev Ops:  Solid experience with modern CI/CD pipelines and tools (Git, Jenkins, Maven/Gradle).

Agile Mindset:  A strong thought‑leader, communicator and collaborator with a proven track record of success in an Agile delivery environment.

Preferred (Nice to Have)

Financial Domain Knowledge:  Subject matter expertise in financial markets, particularly in exchange‑traded derivatives and futures trading.

Containerization:  Experience developing and deploying applications on container platforms like Docker, Kubernetes or Open Shift.

No

SQL

Experience:

Familiarity with No

SQL databases such as MongoDB.

Other

Skills:

Experience with FIX Protocol.

Experience with leveraging AI tools.

Education:

Bachelor’s degree in computer science, Engineering or a related field. A Master’s degree is a plus.

Job Family Group
Technology

Job Family
Applications Development

Time Type
Full…
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