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 setting. 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.

📌 Senior Java Full Stack Developer (Toronto)
🏢 Cynet Systems
📍 Toronto