Senior Java Full Stack Developer

Job Title: Senior Java Full Stack Developer

Job Location: Toronto, ON

Job Type: Contract

Pay Range: $53.00hr - $58.00hr

Job Overview:

Our client is seeking a Senior Java Full Stack Developer to design and deliver scalable enterprise applications within a complex financial-services environment. The role will focus on Java and Spring Boot microservices, Angular or React user interfaces, REST APIs, Kafka-based event processing, cloud platforms, and containerized deployments. The candidate will build secure, high-volume applications and collaborate across architecture, product, quality engineering, DevOps, and support teams.

Key Responsibilities:

• Design, develop, and enhance Java and Spring Boot microservices.
• Build responsive web interfaces using Angular or React.
• Develop secure and reusable RESTful APIs for enterprise integrations.
• Implement synchronous and event-driven integrations using REST and Apache Kafka.
• Support client, account, transaction, payment, and preference-processing workflows.
• Design services using microservices, event-driven, and domain-driven architecture principles.
• Develop automated unit, functional, integration, and performance tests.
• Create mock services and event simulators for end-to-end testing.
• Perform application performance testing and troubleshoot latency or throughput issues.
• Deploy and support applications on OpenShift, Kubernetes, or AWS container platforms.
• Develop and maintain CI/CD pipelines using Jenkins and GitHub Actions.
• Implement authentication and authorization using OAuth 2.0, JWT, Spring Security, and token-based access controls.
• Monitor distributed applications using Prometheus, Grafana, and application logs.
• Optimize MongoDB and PostgreSQL queries, indexes, and data-access patterns.
• Participate in Agile planning, design reviews, code reviews, production releases, and incident resolution.
• Identify application defects, security vulnerabilities, and opportunities for technical improvement.

Required Skills:

• Strong hands-on development experience with Java 8 or later.
• Advanced experience with Spring Boot, Spring MVC, Hibernate, and microservices.
• Experience developing REST APIs and distributed backend services.
• Hands-on experience with Angular or React, JavaScript, TypeScript, HTML, and CSS.
• Experience with Apache Kafka and asynchronous message processing.
• Experience with PostgreSQL and MongoDB.
• Experience deploying applications using Docker, Kubernetes, or OpenShift.
• CI/CD experience with Jenkins, GitHub Actions, Git, Maven, or Gradle.
• Experience with OAuth 2.0, JWT, and Spring Security.
• Experience with JUnit, Postman, and performance-testing tools.
• Understanding of Agile delivery and the software development lifecycle.

Preferred Skills:

• Experience with AWS services and EKS or ECS.
• Experience working within banking, payments, financial services, or another regulated industry.
• Familiarity with PCI-DSS-aligned application controls.
• Experience implementing Prometheus and Grafana monitoring.
• Exposure to fraud detection, anomaly detection, or risk analytics integrations.
• Knowledge of Redis and performance-testing tools such as JMeter.

Education and Certifications:

• Bachelor s degree in Computer Science, Engineering, or a related field.
• AWS certification is considered an asset.

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• Medical, Dental, and Vision Insurance
• 401(k) Retirement Plan
• Health Savings Account (HSA)
• Disability Insurance (Short-Term and Long-Term)
• Life and AD&D Insurance
• Paid Sick Leave (where required by applicable state or local law)
• Supplemental Insurance Plans
• Identity Theft Protection
• Pet Insurance
• Employee Wellness Programs
• Employee Assistance Program (EAP)
• Career Growth and Professional Development Opportunities