Senior Java Full Stack Developer

Role Name: Senior Java Full Stack Developer

Location: Toronto / 4 days a week on site not negotiable, F2F interview required

Job Description:

Role Overview

We are 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 ideal candidate will have experience building secure, high-volume applications and collaborating 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.