Senior Backend Engineer

About aematic

aematic is the optimization and measurement layer for advertising on AI answer-engines, starting with OpenAI’s ChatGPT. As advertising opens up on AI assistants, advertisers need real tooling to plan, launch, optimize, and measure campaigns on a channel the native consoles barely support. aematic runs the full loop for the advertiser: research the account, plan and launch campaigns, manage bids, and measure outcomes. The product is live with paying customers, and the engineering team keeps the optimizer ahead of what the native tools offer.

The role

You will build and scale the core platform: the services that run campaigns, manage bids, sync with the ad-platform APIs, and orchestrate our multi-agent optimization loop. Our backend is FastAPI and SQLAlchemy on Postgres, with durable background jobs running the agent and scheduling work. As an early backend hire, you will own significant surface area and set patterns the rest of the team builds on.

What you will do

• Design and build backend services for campaign management, bidding, measurement, and the agentic optimization loop.
• Integrate deeply with ad-platform APIs (sync, conversion data, bidding) and adapt quickly as they evolve.
• Build and harden the durable job and event infrastructure that runs agent workflows and scheduled optimization.
• Own data models and APIs that the frontend and downstream systems depend on.
• Keep the system reliable as customer count and ad spend under management grow.
• Work directly with founders, ML engineers, and data scientists; the team is small and scope is wide.

What we are looking for

• 5+ years building production backend systems, with strong Python.
• Experience with web frameworks (FastAPI, Django, Flask) and relational databases (Postgres or similar).
• Comfort with asynchronous and background-job systems and the failure modes that come with them.
• Experience integrating third-party APIs, ideally where the API is changing under you.
• Pragmatism and speed; you ship, measure, and iterate rather than gold-plate.

Nice to have

• Adtech, martech, or marketplace/auction experience.
• Experience building systems that orchestrate LLM agents or other ML services in production.
• Background working against a fast-moving external platform API.

Why now

Advertising on AI answer-engines is a new channel, and the tooling layer around it is wide open. The platform you build now becomes the system of record for it.