Lead Software Engineer

United States Digital Space LLC; Mississauga; On-site; CAD 169,925 - 240,259; Full time

Job summary

United States Digital Space LLC seeks a Senior Java Engineer to drive architecture, design, and implementation of a high-performance data service for post-trade orders and executions. This hands-on role tackles concurrency, low-latency messaging, and large-scale data processing within a distributed environment.

You will mentor developers, uphold CI/CD practices, and collaborate with traders, product managers, and stakeholders across a global Agile team to deliver robust technical solutions.

Qualifications

• 8+ years in hands-on software architecture, design and development.
• Deep server-side Java knowledge with multi-threading and performance tuning.
• Experience architecting distributed cloud microservices.
• Relational DB design, data modeling, and performance tuning.
• Hands-on with high-throughput messaging (Kafka/Solace).
• CI/CD pipelines with modern tools; Agile delivery experience.

Responsibilities

• Architect, design, build, and maintain high-performance Java microservices.
• Solve concurrency, low-latency, large-scale data processing challenges.
• Collaborate with global Agile teams including traders and product managers to deliver technical solutions.
• Maintain code quality with automated testing, code reviews, and CI/CD practices.
• Modernize platform using Kafka, Docker, OpenShift and related tech.
• Mentor mid-level and senior developers and drive technical excellence.

Skills

8+ years experience

Core Java

System architecture

Database proficiency

Messaging systems

CI/CD & DevOps

Agile delivery

Education

Bachelor’s degree in CS/Engineering

Master’s degree (plus)

Tools

Git

Jenkins

Maven/Gradle

Job description

Discover your future at the company

Working at the company is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At the company, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

Join the company 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 OpenShift, 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
• DevOps & CI/CD: Git, Jenkins, TeamCity, Tekton, uDeploy, Harness, Maven/Gradle
• Container & Cloud: Docker, Kubernetes, Red Hat OpenShift

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 & 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.

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 OpenShift.
• NoSQL Experience: Familiarity with NoSQL 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.

$120,800.00 - $170,800.00

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. Additionally, if you choose or consent, we can match your skills and abilities to other suitable roles at the company. Importantly, all hiring processes and decisions are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision‑making.

*This job opening is for an existing job vacancy.*

*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.*