Sr Java Developer

Role : Sr Java Developer Location : Toronto, ON (Hybrid-3/4 days onsite) Interview Process First Round: Virtual Interview Final Round: F2F Interview Job Summary Seeking a strong Senior Java Developer with deep Core Java, Multithreading, and Concurrency expertise to build frameworks and reusable components supporting payments technology teams. Key Skills Strong Core Java – OOP, collections, memory management, exception handling. Multithreading & Concurrency – thread creation/management, synchronization, locks, thread pools, race conditions, deadlocks, thread coordination. Java Concurrency APIs – ExecutorService, CompletableFuture, Future, ConcurrentHashMap, BlockingQueue, etc. Strong Spring & Spring Boot experience. Experience with Event-Driven Architecture and asynchronous processing. Experience building scalable, high-performance applications/frameworks. Payments/banking experience is preferred. Priority: Core Java & Concurrency > Spring > Spring Boot > Event-Driven Architecture. JBoss/WebSphere/application server experience is not a key requirement. We are an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, citizenship status, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable law. https://www.e-verify.gov/sites/default/files/everify/posters/IER_RighttoWorkPoster.pdf

Build frameworks and reusable components to support payments technology teams. Develop scalable, high-performance applications focusing on concurrency and asynchronous processing.

Requires deep expertise in Core Java, multithreading, and the Spring ecosystem. Experience in payments or banking and event-driven architecture is preferred.

• Spring BootPreferred

Identified from the job description. Confirm important requirements above.

• Core Java
• Multithreading
• Concurrency
• Spring
• Spring Boot
• Event-Driven Architecture
• Asynchronous Processing
• OOP
• Collections
• Memory Management
• Exception Handling
• ExecutorService
• CompletableFuture
• ConcurrentHashMap
• BlockingQueue
• Scalable Applications

• Software
• Technology
• Finance & Accounting
• Engineering
• Consulting

Minimum experience

5+ years

Apply by

Sep 16, 2026

Posting language

English

Working hours

40 hours per week

Office presence

4 days per week

Seniority

Mid-Senior level

Application method

Direct apply is available