At the company, you’ll have the opportunity to grow your career, give back to your community and make a real impact. 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 setting.

You will play a key role in building resilient and high‑performing scalable solutions that directly impact our trade consumption, enrichment and reporting. Architect, design, build, and maintain high-performance, scalable, and reliable Java‑based microservices. Tackle challenging technical problems related to concurrency, low‑latency messaging, and large‑scale data processing in a distributed environment.

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. Uphold and contribute to our high standards for code quality, automated testing (unit, integration and regression), code reviews, and CI/CD practices. Drive the evolution of our platform by leveraging modern technologies like Kafka, Docker, and OpenShift, and contribute to the strategic transformation of our architecture.

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

Server OS : Red Hat Enterprise Linux Java (17+), Spring Boot, REST APIs, Microservices Databases : Microsoft SQL Server, MongoDB DevOps & CI/CD : Git, Jenkins, TeamCity, Tekton, uDeploy, Harness, Maven/Gradle 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.

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

CI/CD & DevOps: 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. Familiarity with NoSQL databases such as MongoDB.

Experience with leveraging AI tools. Bachelor’s degree in computer science, Engineering, or a related field. A Master’s degree is a plus. $We use automated processing, including artificial intelligence, for our legitimate business interests or reasonable and appropriate business purposes to identify and align the candidate’s skills and abilities with a specific job opening.

Our automated processing and AI do not involve relying on automatic or autonomous decision‑making. The company 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.

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📌 Senior/Lead Software Engineer (Platform)* (Mississauga)
🏢 United States Digital Space
📍 Mississauga