Sr. Java Developer

Role: Sr. Java Developer Location: Hybrid---Toronto, ON *Candidates must pass HankerRank Test by 80% The top priority for hiring should be strong core Java expertise, especially in multithreading and concurrency. While Spring and Spring Boot remain critical (close second and third priorities), they should not outweigh deep core Java skills. What matters less is experience with specific application servers or tools like JBoss, WebSphere, etc. Key skills to prioritize: 1. Multithreading experience in Java – Candidates should understand how to create and manage threads, synchronize processes, wait for threads, and coordinate threads working together. 2. Experience with Java concurrency libraries – Strong knowledge of Java’s concurrency utilities and thread-safe collections is important for managing resources and processing data efficiently in concurrent environments. 3. Spring / Spring Boot expertise – They still need to be strong here, but this should complement—not replace—core Java depth. 4. Event Driven architecture Our team builds frameworks used by other payments teams. That requires developers who can handle low-level Java concepts like thread management, concurrency, and data collection behavior in multi-threaded environments.

Develop frameworks used by payment teams focusing on low-level Java concepts. Manage thread coordination and data collection behavior in multi-threaded environments.

Candidates must have deep expertise in core Java multithreading and concurrency utilities. Proficiency in Spring and Spring Boot is required, and candidates must pass a HackerRank test with a score of 80% or higher.

• Spring BootPreferred

Identified from the job description. Confirm important requirements above.

• Core Java
• Multithreading
• Concurrency
• Spring
• Spring Boot
• Event Driven Architecture
• Thread Management
• Java Concurrency Libraries

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

Minimum experience

5+ years

Apply by

Sep 4, 2026

Posting language

English

Working hours

40 hours per week

Seniority

Mid-Senior level

Application method

Direct apply is available