Full-Stack Commerce Platform Engineer

Dentsu is a global marketing and advertising agency, and they are seeking a Full-Stack Commerce Platform Engineer to build modern, secure, and scalable enterprise applications. This role involves full-stack application development, backend and API engineering, frontend development, and collaboration with cross-functional teams to set technical direction and influence architectural decisions.

Responsibilities:

• Design, build, and maintain enterprise applications using Python on the backend and React + TypeScript on the frontend
• Translate business and product needs into scalable, maintainable application architectures
• Establish strong foundations for application structure, security, testing, and developer experience
• Build production-ready application skeletons and core workflows that teams can extend over time
• Define and document clear API contracts, data flows, and integration patterns
• Build and optimize backend services using FastAPI and modern Python frameworks
• Design RESTful APIs with strong validation, versioning, and documentation
• Implement authentication and authorization using OAuth 2.0 / OIDC, RBAC, and enterprise identity providers
• Develop reliable, high-performance services with clear error handling and observability
• Design database schemas and data access layers (e.g., PostgreSQL)
• Build accessible, responsive React applications using TypeScript
• Create reusable component architectures and scalable UI patterns
• Implement secure authentication flows and protected routes
• Develop intuitive interfaces for dashboards, forms, admin tools, and data-driven experiences
• Optimize performance through modern frontend best practices
• Containerize services using Docker with secure, maintainable builds
• Set up Docker Compose local environments for multi-service applications
• Partner with DevOps to support CI/CD pipelines and cloud deployments
• Help ensure applications are ready for cloud-native environments
• Partner with engineers, designers, product managers, and business teams
• Lead early technical implementation and influence architectural decisions
• Share knowledge, mentor teammates, and contribute to engineering standards
• Communicate technical decisions clearly to both technical and non-technical audiences

Requirements:

• 5+ years of professional software development experience across frontend and backend
• Strong hands-on experience building production applications with Python
• Experience developing APIs with FastAPI or similar frameworks
• Solid experience building React applications with TypeScript
• Experience designing full-stack applications from initial architecture to production
• Hands-on experience with Docker and local development environments
• Experience working with authentication, authorization, and secure application patterns
• Comfort collaborating with distributed teams and multiple disciplines
• Python (modern backend development and async programming)
• FastAPI (dependency injection, middleware, API design)
• React and TypeScript (hooks, component architecture, state management)
• REST API design and integration
• Authentication and authorization (OAuth 2.0, OIDC, RBAC)
• SQL databases (e.g., PostgreSQL)
• Docker and Docker Compose
• Git-based workflows and code reviews
• Testing across frontend and backend