Senior Java Software Engineer
- Markham, ON
- Hybrid
- Posted Sep 27, 2026
- 1 position
$120,000–$130,000 / year
Opens an external site
- Employment type
- Full-time
- Experience level
- Lead · 10+ years
- Minimum education
- Bachelor’s degree
- Apply by
- Oct 25, 2026
- Posting language
- English
- Working hours
- 40 hours per week
- Seniority
- Mid-Senior level
- Application method
- Direct apply is available
Job summary
Design and maintain scalable Java backend applications, RESTful APIs, and system integrations, while improving performance, security, and reliability in distributed environments. Troubleshoot production issues, write unit and integration tests, collaborate on system architecture, and contribute to continuous improvement.
Job details
Our client, a leading technology company in the wireless communications space, is seeking a Senior Software Engineer to join their team in the Markham area. Job Title: Senior Software Engineer Location: Markham ON Position Type: Hybrid Key Requirements Experience: 8–12+ years of professional backend development experience with a degree in CS, Software Engineering, or related field. Core Tech: Strong expertise in Java, Spring Boot, Kafka, and containerized architectures (Kubernetes / OpenShift). Networking & Protocols: Experience with low-level network socket programming (TCP/IP, UDP) and distributed system integration patterns. Security & Tools: Understanding of secure application development (OAuth2, JWT, encryption) and strong Git proficiency. Nice-to-Have: CI/CD pipelines, Linux environments, scripting, and cloud platforms (AWS/Azure/GCP). Responsibilities Design and maintain scalable Java-based backend applications, RESTful APIs, and system integrations. Optimize system performance, security, and reliability across distributed environments. Troubleshoot production issues and write robust unit/integration tests. Collaborate on system architecture and contribute to continuous improvement. Apply Now! If you are driven by the opportunity for career growth within a positive and supportive work environment, we invite you to submit your resume, along with your salary expectations in confidence to: Matthew Snider msnider@hcr.ca Please indicate the name of the position you are applying for in the subject line. Only those selected to move forward in the consideration process will be contacted. Thank you for your interest! HCR Permanent Search is recruiting on behalf of our client for an existing vacancy. HCR Personnel Solutions Inc. welcomes applications from people with disabilities. Accommodation is available upon request for candidates taking part in all aspects of the recruitment and selection process.
What you’ll do
Design and maintain scalable Java backend applications, RESTful APIs, and system integrations, while improving performance, security, and reliability in distributed environments. Troubleshoot production issues, write unit and integration tests, collaborate on system architecture, and contribute to continuous improvement.
Requirements
Requires 8–12+ years of professional backend development experience and a degree in computer science, software engineering, or a related field. Candidates should have strong Java, Spring Boot, Kafka, containerization, networking, distributed systems, application security, and Git experience; CI/CD, Linux, scripting, and cloud experience are desirable.
Listed skills
- Kubernetes · Preferred
- CI/CD · Preferred
- TCP/IP · Preferred
- Linux · Preferred
- Java · Preferred
- Spring Boot · Preferred
- Git · Preferred
Other relevant skills
Identified from the job description. Confirm important requirements above.
- Java
- Spring Boot
- Kafka
- Kubernetes
- OpenShift
- TCP/IP
- UDP
- Network Socket Programming
- Distributed Systems
- RESTful APIs
- OAuth2
- JWT
- Encryption
- Git
- CI/CD
- Linux
Job areas
- Software
- Technology
- Engineering