About Chorus AI

Chorus AI helps mission-driven organizations grow their impact through AI-powered insights and automation. We unify data and content across digital, direct marketing, and field campaigns to show what’s working, why it works, and how to scale it.

We’re a lean team of three founders building an AI-first platform designed to help organizations move faster and make smarter decisions. With our seed round closing and revenue growing 20% month-over-month, we’re ready to bring on our first engineering hire.

About the Role

As our Founding Backend Engineer, you’ll work directly with the CEO—who also leads technical strategy—to build and scale the core systems that power our platform. You’ll own implementation and delivery end-to-end, translating ideas into production-ready systems that perform at scale. This role is deeply hands-on: expect to spend most of your time coding, architecting for growth, and shipping features quickly and reliably.

The ideal candidate thrives in ambiguity, has a strong bias for action, and believes progress beats perfection. You eat, sleep, and breathe problem-solving, shipping fast, learning quickly, and building the kind of resilient systems that make enterprise clients take notice. This is a demanding, high-ownership role suited for someone who wants to be at the heart of an early-stage company, with the autonomy to make things happen and the satisfaction of seeing their work drive real-world impact.

What You’ll Do

• Design, build, and maintain the backend systems that drive AI-powered campaign insights.
• Collaborate with the CEO to make core architecture and design decisions that shape Chorus AI’s technical foundation.
• Ship production features across agents, agent tools, MCP servers, data pipelines, and integrations.
• Rapidly iterate on new features and infrastructure.
• Tackle complex challenges: real-time data pipelines, analytics scalability, operational reliability.
• Maintain engineering best practices and contribute to shaping our engineering practice, tooling, and culture from the beginning.

Our Stack

• Backend: Modern Python backend (Pydantic, FastAPI, uv)
• Database & Infra: MongoDB, Pinecone, Redis, AWS S3
• Frontend: React
• Hosting: Render and Vercel

Who You Are

• Senior Backend Engineer with expertise in Python and implementing production systems.
• Minimum of 5 years relevant experience.
• Strong background in building scalable, maintainable backend architectures.
• You are hands-on and resourceful, low-ego, have relentless curiosity, and are comfortable in fast-paced early-stage startup environments.
• Excited to work in-office 5 days/week in Toronto (68 Claremont St, Queen & Ossington).
• You’ve contributed to collaborative or multi-user product features, and you understand the data, consistency, and UX considerations that come with them.
• You’ve influenced engineering culture through code reviews, mentoring, or leading by example, and you’re comfortable being a resource for others on architectural decisions.
• Fluency with modern AI tools (ie Claude Code, Cursor, etc)–-not just using them for code generation, but integrating them into how you debug, document, explore ideas, and reduce manual effort.
• You’ve led backend projects from start to finish — shaping architecture, guiding trade-offs, and delivering reliable systems that support real-world product needs.

Chorus AI is an equal opportunity employer committed to diversity, equity, and inclusion in the workplace. We welcome applicants from all backgrounds and do not discriminate on the basis of race, national or ethnic origin, colour, religion, age, sex, sexual orientation, gender identity or expression, marital or family status, disability, or any other characteristic protected under applicable Canadian laws.

We are also committed to providing reasonable accommodations throughout the recruitment process. If you require an accommodation, please email careers@chorusai.co, and we’ll work with you to meet your needs.