Senior Java Backend Developer – Node.js, AWS Cloud & GenAI

Senior Java Backend Developer – Node.js, AWS Cloud & GenAI

Location: Toronto, ON

Work Model: Hybrid (2 days per week in-person at Toronto office preferred)

Experience

Required:

8–10 years

• AWS Cloud Computing
• Advanced Java Concepts
• AI & GenAI – Products & Tools

• AWS experience (mandatory)
• GenAI experience (mandatory)

• Design, build, and operate scalable web applications using Java for the backend and modern JavaScript/TypeScript for the frontend.
• Lead solution design, own end-to-end delivery, mentor team members, and drive performance, reliability, and security.
• Design, build, and operate cloud-native backend services on AWS using Node.js.
• Lead solutions from architecture through delivery while maintaining high standards for scalability, reliability, security, and developer experience.

Architecture & Delivery

• Design and implement robust REST and GraphQL services using Java (Java 17+) and Spring Boot (or Micronaut/Quarkus).
• Develop responsive front-end applications using React, Angular, or Vue with TypeScript.
• Own end-to-end feature delivery across backend APIs, databases, frontend UI, and integrations.
• Define API contracts, service boundaries, and documentation using OpenAPI/Swagger.
• Ensure high performance, scalability, and observability through profiling, tracing, and metrics.

Cloud, Dev Ops & Reliability

• Build CI/CD pipelines using Git Hub Actions, Jenkins, or Git Lab CI with automated testing and deployments.
• Implement Infrastructure as Code using Terraform, Cloud Formation, or CDK.
• Utilize Docker and Kubernetes (EKS, AKS, or GKE) for containerization and orchestration.
• Set up monitoring and alerting using Prometheus, Grafana, Open Telemetry, Cloud Watch, New Relic, or Datadog.
• Drive incident response and root cause analysis.
• Apply caching, rate limiting, and resilience patterns including circuit breakers, retries, backoff, and bulkheads.

Security & Compliance

• Enforce secure coding practices based on OWASP Top 10.
• Implement API authentication using OAuth2 and OIDC.
• Manage secrets securely.
• Implement data protection using TLS, KMS, and encryption at rest and in transit.
• Support audits and compliance standards such as SOC2, ISO, and PCI.

Quality & Technical Leadership

• Establish coding standards and testing strategies for unit, integration, and end-to-end testing.
• Conduct code reviews and mentor development teams.
• Lead design reviews and technical roadmap initiatives.
• Collaborate with Product, QA, SRE, and Data teams to deliver business outcomes.

• 8–12+ years of professional software development experience.
• 5+ years of experience building backend services using Java, preferably Spring Boot.
• Strong front-end development experience with React (preferred), Angular, or Vue.
• Experience with state management frameworks such as Redux, NgRx, or Pinia.
• Proficiency in JavaScript, TypeScript, and modern build tools such as Webpack, Vite, npm, yarn, or pnpm.
• Experience with relational and No
  
  SQL databases including PostgreSQL, MySQL, Oracle, MongoDB, or Cassandra.
• Strong SQL and query optimization skills.
• Experience with CI/CD pipelines, Docker, and Kubernetes.
• Hands-on experience with JUnit, TestNG, Mockito, Jest, React Testing Library, Cypress, or Playwright.
• Strong understanding of distributed systems, event-driven architecture, messaging, and idempotency.
• Solid knowledge of OWASP, OAuth2, OIDC, and JWT.
• Excellent problem-solving, communication, documentation, and stakeholder management skills.

• Experience with Kafka, Kinesis, RabbitMQ, asynchronous processing, and saga/outbox patterns.
• Experience with cloud platforms such as AWS, Azure, or GCP and managed services including RDS, DynamoDB, Open Search, and API Gateway.
• Performance and scalability optimization using JMeter, k6, JVM tuning, Lighthouse, and Web Vitals.
• Experience with micro frontends, design systems, and WCAG accessibility standards.
• Experience in fintech, payments, or other regulated environments.
• Knowledge of Kotlin, Go, or Python.
• Experience with Micronaut or Quarkus.

• Systems thinking with a focus on scalability, resilience, and observability.
• Pragmatic execution with emphasis on quality, automation, and iterative delivery.
• Strong ownership mindset with a focus on service reliability and continuous improvement.
• Security-by-design approach throughout the software development lifecycle.
• Technical leadership with mentoring, collaboration, and engineering excellence.