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About the Role
Lightspeed is seeking a Senior Frontend Developer to join our Agent OC Squad. This role focuses on building intelligent, AI-powered tools and capabilities, specifically integrating generative AI features into our product using LLMs and agent frameworks. You will also help establish best practices and platform patterns for AI adoption across the organization, shaping the future of intelligent automation.
Responsibilities
- Design and build intuitive frontend interfaces that effectively expose AI and LLM capabilities to users and partners.
- Create scalable, performant React-based UIs that handle asynchronous and long-running operations, streaming responses, and real-time agent interactions.
- Contribute to product direction and roadmap for AI-powered features, defining what to build and why.
- Work closely with backend engineers, Product Managers, and Designers to integrate AI features and ship products.
- Build reusable, well-tested React components with a focus on performance, observability, and platform reliability.
- Support peers, share knowledge, and raise the engineering bar through code reviews and mentorship.
Requirements
- Outstanding JavaScript/TypeScript knowledge with 5+ years of production experience.
- Expert-level React.js and modern frameworks (Next.js, etc.).
- Proven technical leadership and ability to set frontend technical direction.
- Strong understanding of API integration patterns, data fetching strategies, and frontend performance optimization.
- Commitment to code quality — clean, maintainable, well-tested code with strong testing practices and accessibility standards.
- Experience with modern styling approaches (CSS Modules, Tailwind, CSS-in-JS) and web components / shadow DOM.
- Experience with AI-powered frontend development: agent SDKs (Vercel AI SDK, assistant-ui), Generative UI concepts, or LLM API integrations.
- Familiarity with real-time communication (WebSockets, streaming) and AI-specific patterns (RAG, vector search, semantic retrieval).
- Experience building responsive, adaptive interfaces such as chat UIs, conversational flows, or backend-for-frontend architectures.
- Experience contributing to or working with open-source frontend or AI projects.
- Familiarity with cloud infrastructure (AWS, GCP), CI/CD systems, Docker, or observability tooling.
Skills
- JavaScript
- TypeScript
- React.js
- Next.js
- API integration
- Frontend performance optimization
- Testing practices
- Accessibility standards
- CSS Modules
- Tailwind
- CSS-in-JS
- Web components
- Shadow DOM
- Agent SDKs
- Generative UI
- LLM API integrations
- WebSockets
- Streaming
- RAG
- Vector search
- Semantic retrieval
- Responsive design
- Adaptive interfaces
- Chat UIs
- Conversational flows
- BFF architectures
- Open-source contribution
- Cloud infrastructure (AWS, GCP)
- CI/CD
- Docker
- Observability tooling
Location
- Remote
Work Type
- Full-time
Experience Level
- Senior
- 5+ years of production experience
Benefits
- Lightspeed share scheme
- Flexible working policy
- Mental health online platform and counseling & coaching services
- Health and wellness benefits
- LinkedIn Learning license
- Volunteer day
About the Company
- Lightspeed is building communities through commerce.
- Lightspeed's one-stop commerce platform helps merchants innovate to simplify, scale, and provide exceptional customer experiences.
- Our cloud commerce solution transforms and unifies online and physical operations, multichannel sales, expansion to new locations, global payments, financial solutions, and connection to supplier networks.
- Founded in Montréal, Canada in 2005, Lightspeed is dual-listed on the New York Stock Exchange (NYSE: LSPD) and Toronto Stock Exchange (TSX: LSPD).
- With teams across North America, Europe, and Asia Pacific, the company serves retail, hospitality, and golf businesses in over 100 countries.
- Lightspeed is a true Canadian tech success story.
Equal Opportunity
- Lightspeed is a proud equal opportunity employer and we are committed to creating an inclusive and barrier-free workplace.
- Lightspeed welcomes and encourages applications from people with disabilities.
- Accommodations are available on request for candidates taking part in all aspects of the selection process.
- The ethos of our business has been about inclusion from the very beginning, and we strive to provide a workplace where everyone belongs.