Full-Stack Commerce Platform Engineer

Job Description: Why this role You will play a key role in building modern, secure, and scalable enterprise applications that power real business outcomes. This role is ideal if you enjoy owning work end‑to‑end, shaping application foundations, and seeing your ideas move quickly from concept to production. You will work across the full stack—backend services, APIs, frontend experiences, and local development environments—while partnering closely with product, design, data, DevOps, and business stakeholders. Your work will set the technical direction and patterns that other engineers build on. What you’ll do Full‑stack application development 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 Backend & API engineering 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) Frontend development 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 Containerization & delivery foundations 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 Collaboration & technical leadership 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 What you bring Required experience 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 Required technical skills 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 The annual salary range for this position is $119,000 - $143,500. Placement within the salary range is based on a variety of factors, including relevant experience, knowledge, skills, and other factors permitted by law. Benefits available with this position include: • Medical, vision, and dental insurance, • Life insurance, • Short-term and long-term disability insurance, • 401k, • Flexible paid time off, • At least 15 paid holidays per year, • Paid sick and safe leave, and • Paid parental leave. Dentsu also complies with applicable state and local laws regarding employee leave benefits, including, but not limited to providing time off pursuant to the Colorado Healthy Families and Workplaces Act, in accordance with its plans and policies. For further details regarding Dentsu benefits, please visit www.dentsubenefitsplus.com. At dentsu, we believe great work happens when we’re connected. Our way of working combines flexibility with in-person collaboration to spark ideas and strengthen our teams. Employees who live within a commutable distance of one of our hub offices, currently located in Chicago, metro Detroit, Los Angeles, and New York City, are required and expected to work from the office three days per week (two days per week for employees based in Los Angeles). Dentsu may designate other Hub offices at any time. Those who