Full Stack Engineer – AI Character Platform

We’re building something new inside our AI Studio, and we’re looking for a Full Stack Engineer to help build it with us. This role sits at the center of a new platform that is being actively designed and shipped. The architecture is still taking shape, and the integration surface is constantly expanding. What excites us is the opportunity to build the infrastructure that makes never-before-imagined character experiences possible. 

We work where storytelling, imagination, and technology converge. Our focus is on building the core platform: the APIs, the admin tooling, the service integrations, and the delivery infrastructure that makes AI-powered character interactions real. This work connects what brand and creative teams envision with what audiences ultimately experience. 

This role is foundational to everything the platform does. Working closely with the Engineering Manager and Principal AI Engineer, this Full Stack Engineer will own significant portions of the system end to end — from the tooling that configures and versions character behavior to the API layer that external partners and products consume. Success here means shipping features that hold up under real-world conditions and integrating reliably with the AI services that bring characters to life. 

What You’ll Do 

• Design and build features for our AI character platform. This includes: the admin tooling, as well as the API layer consumed by external integrations and partners.
• Develop, maintain, and evolve the REST APIs that power character experiences across interaction modalities, with attention to versioning, access control, and reliability.
• Integrate with third-party AI and media services, including LLM providers, voice services (STT/TTS), and real-time delivery infrastructure.
• Contribute to AWS infrastructure, deployment pipelines, and environment management as the platform grows and new capabilities are introduced.
• Partner closely with the Engineering Manager and Principal AI Engineer on architectural decisions, code review, and technical planning.
• Participate in observability, on-call practices, and operational improvements to ensure the platform remains reliable as usage scales.

What You Will Bring 

• 3+ years of full stack engineering experience with a strong backend emphasis.
• Proficiency with modern frontend frameworks (React or equivalent) and backend technologies (Node.js and/or Python).
• Experience building, versioning, and maintaining production REST APIs consumed by external teams or partners.
• Solid AWS fundamentals — Lambda, API Gateway, RDS, S3, and related services.
• A track record of integrating with third-party APIs in production environments, including managing reliability, error handling, and graceful degradation.
• Strong communication skills and comfort working in a small, fast-moving team across multiple concurrent workstreams.

Extra Credit 

• Experience integrating with LLM APIs (OpenAI, Gemini, Anthropic, or equivalent).
• Familiarity with real-time communication systems (WebRTC, WebSockets, or LiveKit).
• Experience with voice and audio API integrations (TTS/STT).
• Background in platform, developer-tooling, or API-first product development.
• Observability experience with Datadog or equivalent tooling.

We are an Equal Opportunity / Affirmative Action Employer

Hasbro is committed to equality of opportunity in all aspects of employment. We are committed to making all employment decisions without regard to race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, marital status, or any other legally protected status.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. If you have a disability and require assistance in this application process and need to request an accommodation, please contact your recruiter or coordinator.