Node.js API Developer (AWS) – Banking

• Location: Toronto, Ontario
• Remote: Hybrid
• Type: Contract
• Job #35340

Our client is seeking experienced Node.js API Developers to support a major Digital Core modernization program within the banking sector.

The successful consultants will join an API Modernization team focused on building secure, scalable, cloud-native APIs while supporting modernization of authentication, authorization, and API security capabilities across critical digital banking services.

This role requires strong backend development expertise, hands-on AWS serverless experience, and the ability to deliver enterprise-grade API solutions within a complex financial services environment.

Key Responsibilities

• Design, develop, and maintain high-performance backend applications using Node.js
• Build and support scalable microservices and API solutions within AWS environments
• Develop serverless and event-driven solutions leveraging:
  • AWS Lambda
  • API Gateway
  • SQS
  • SNS
  • DynamoDB
• Design and implement secure API integrations between internal platforms, services, and third-party applications
• Build event-driven architectures using asynchronous messaging patterns
• Optimize DynamoDB schemas, indexing strategies, and application performance
• Implement clean, maintainable code following software development best practices
• Conduct code reviews and support engineering standards
• Collaborate with DevOps teams on CI/CD pipelines, infrastructure automation, monitoring, and deployments
• Create technical documentation for APIs, architecture, and operational processes
• Mentor developers on AWS and Node.js best practices

Required Skills & Experience

• 5+ years of professional software development experience
• 3+ years of hands-on Node.js development experience
• Strong experience with:
  • Node.js
  • Express.js, NestJS, or similar frameworks
  • JavaScript / TypeScript
• Strong AWS experience including:
  • AWS Lambda
  • API Gateway
  • SQS
  • SNS
  • DynamoDB
• Experience designing and developing RESTful APIs at enterprise scale
• Strong understanding of:
  • API security
  • Authentication/authorization concepts
  • Event-driven architectures
  • Microservices design patterns
• Experience with asynchronous programming concepts:
  • Promises
  • Async/Await
  • Event-driven development
• Strong Git/version control experience
• Experience with unit and integration testing frameworks:
  • Jest
  • Mocha
  • Similar tools

Nice to Have

• Financial Services / Banking experience (strongly preferred)
• Retail banking domain knowledge
• GraphQL experience
• GitHub Copilot, Claude Code, or AI-assisted development tools
• Infrastructure-as-Code exposure
• CI/CD pipeline experience

Work Model

Hybrid – Toronto
2–3 days per week onsite required