Senior Java Backend Developer to design and develop cloud-native backend solutions on AWS - JP953

Our financial services client is seeking a Senior Java Backend Developer (10+ years) to design and develop cloud-native backend solutions on AWS

Duration: Until Dec 31st, 2026 (high possibility of extension)

Location: Downtown Toronto (Hybrid, 2 days a week - Monday and floating day)

Hours of Operation: 9 - 5

Role Overview

The Java Backend Developer is responsible for designing, developing, and maintaining scalable, secure, and high-performance backend systems. This role requires deep expertise in Java development and strong experience building cloud-native applications on AWS. The developer will translate business requirements into robust backend services, ensuring alignment with architectural standards, cloud best practices, and enterprise technology strategy.

Must Have Skills:

• 8+ years of experience in Java backend development
• Strong proficiency in Java (core + Spring Boot)
• Reactive programming using Java Flux / Project Reactor
• RESTful API design and development
• Distributed systems and microservices architecture
• Hands-on AWS experience (ECS, Lambda, ECR, RDS, DynamoDB, IAM)
• Experience with messaging systems (Kafka, MQ)
• Experience with SQL and NoSQL databases
• Cloud-native application design expertise
• Strong DevOps experience (CI/CD, monitoring, infrastructure as code)
• JUnit or similar backend testing frameworks
• Experience building and scaling large backend systems

Core Competencies

• Strong problem-solving and analytical skills
• Deep understanding of backend systems, APIs, distributed and reactive architecture
• Ability to work independently on complex technical challenges
• Strong collaboration and communication skills
• Commitment to clean code and engineering excellence

Education

• Bachelor’s degree in Computer Science, Software Engineering, or a related technical field (or equivalent practical experience).

Responsibilities:

• Design, develop, and maintain Java-based backend applications and microservices
• Build and integrate RESTful APIs, messaging systems (Kafka/MQ), and data pipelines
• Develop cloud-native solutions on AWS, ensuring scalability, reliability, and security
• Implement best practices in logging, monitoring, performance, and error handling
• Translate business requirements into technical designs and high-quality code
• Perform code reviews and ensure adherence to development standards
• Conduct unit testing and support automated testing frameworks
• Troubleshoot and resolve production issues, including root-cause analysis
• Optimize systems for performance, scalability, and maintainability
• Contribute to architecture design and technology evaluations
• Collaborate with stakeholders to deliver high-quality solutions
• Support DevOps practices including CI/CD and deployments
• Mentor team members and promote backend engineering best practices