Senior Java Platform Architect & Technical Lead (Hybrid)

Citi; Toronto; Hybrid; CAD 170,000 - 241,000; Full time

Job summary

Citi is seeking a Lead Java Engineer for a highly scalable distributed calculation platform. You will design and build Java software that powers hundreds of millions of calculations daily, coordinating thousands of compute nodes and large memory footprints, while mentoring engineers and helping shape the platform's long-term direction.

You will work in a hybrid model with on-site and remote days, lead CI/CD improvements, build customer-facing APIs, and collaborate with DevOps and customers to

Qualifications

• 6+ years of professional software development experience with Java.
• Experience building and improving CI/CD pipelines using DevOps practices.
• Practical experience with Java frameworks such as Spring, Spring Boot or Quarkus.
• Working knowledge of cloud platforms, including AWS, Azure or GCP, and containerization tools such as Docker and Kubernetes.
• Experience designing, building and maintaining large-scale distributed systems and RESTful APIs.
• Solid command of object-oriented programming, design patterns and test automation using frameworks such as JUnit and Mockito.
• Experience working in Agile/Scrum environments, with a Bachelor's or Master's degree in Computer Science, Engineering or a related field.

Responsibilities

• Design and build Java-based software that powers a high-performance calculation engine processing hundreds of millions of distributed calculations every day.
• Develop new platform features without slowing down a system where small inefficiencies are multiplied across millions of calculations.
• Solve complex distributed computing problems, such as moving small amounts of data efficiently across huge numbers of machines.
• Lead improvements to the CI/CD pipeline that enable frequent, reliable software releases for a SaaS platform.
• Build an API that gives customers controlled access to configure how the platform runs for their own use cases.
• Create new testing mechanisms that support rapid, dependable releases across a daily microservice deployment cycle.
• Mentor and coach engineers through code reviews, technical guidance and career development support.
• Partner directly with customers to resolve issues and optimize large-scale distributed workloads.

Skills

Java

CI/CD pipelines

Spring/Spring Boot/Quarkus

Cloud platforms (AWS/Azure/GCP)

Docker & Kubernetes

Distributed systems & REST APIs

JUnit & Mockito

Agile/Scrum

Education

Bachelor's or Master's degree in Computer Science/Engineering or related

Tools

Docker

Kubernetes

MongoDB

Cassandra

Job description

Citi is seeking a Lead Java Engineer for a highly scalable distributed calculation platform. You will design and build Java software that powers hundreds of millions of calculations daily, coordinating thousands of compute nodes and large memory footprints, while mentoring engineers and helping shape the platform's long-term direction.

You will work in a hybrid model with on-site and remote days, lead CI/CD improvements, build customer-facing APIs, and collaborate with DevOps and customers to