Senior Frontend/Full-stack Engineer TypeScript AI Platform

About Marketer.com

Marketer.com is the AI growth partner for Shopify brands. We run and optimize advertising across Meta and Google using an autonomous system that learns from brand data, generates creatives, and scales what performs. No agencies. No dashboards. Just smarter, faster growth with less overhead.

We are a Norway-based company that offers the option to work onsite in Oslo, Norway, or remotely from Europe or countries within the CET time zone, +-3 hours.

This role is offered as a long-term B2B contract opportunity.

About the Role: Senior Frontend/Full-stack Engineer TypeScript AI Platform

Join us to build the foundational systems behind an innovative AI agent that plans and executes marketing across real business platforms. This is not just another SaaS backend; you'll work on systems that process structured business data and drive AI-based workflows at scale.

Manta is an end-to-end, trustable, Cloudflare-deployed AI CMO agent. It leverages a per-user agent system approach to create hyper-personalized Action Plans for marketing companies and manages customer ad accounts. You will utilize an in-house Context Graph-backed system to build APIs and visualizations for cross-platform workflow monitoring, dynamic validations, and user-controllable agentic execution.

Additionally, you will contribute to ensuring the underlying Knowledge Graph remains up-to-date in real-time, consuming data streams from various integrations via a fleet of Cloudflare Durable Objects.

What You Will Do

• Build and extend our agents using the Cloudflare Agents SDK and Durable Objects.
• Develop visualizations of massive action plans, integrating data from platforms like Meta, Google, Shopify, and WooCommerce.
• Contribute to schema-driven integration tooling built from our internal data models.
• Work on edge computing services that process and stream structured datasets.
• Help scale per-tenant data environments powering AI decision logic using Knowledge/Context Graphs.
• Design and maintain scalable APIs and full-stack systems in TypeScript.
• Monitor user journeys using Posthog and participate in customer interviews to guide future development.

What We’re Looking For

• 5+ years of full-stack TypeScript experience, including frontend with React and backend with Node.js or similar.
• Experience working with LLM APIs or AI-driven workflows.
• Experience building GraphQL APIs (yoga-server).
• Cloud and distributed systems experience.
• Solid understanding of graph databases and edge-based data processing systems.
• Comfortable working in a small, senior team with significant ownership.

Nice to Have

• Cloudflare Worker/Durable Object/Agents SDK experience.
• Node-based UI (xyflow) experience.
• RDF/JS, SPARQL experience.
• Experience with event-driven or streaming systems.
• Exposure to data-heavy/large domain applications.
• Startup experience.

Why Join Us

• Work on post-LLM AI systems, advancing beyond simple chat interfaces.
• Join a small, senior team with strong technical standards.
• Enjoy real ownership and architectural influence.
• Remote-first culture with flexibility.
• Competitive compensation with equity.

What We Offer

• Real ownership – shape architecture and product decisions from day one.
• Technically ambitious product – build post-LLM AI systems beyond simple chat interfaces.
• Small senior team – collaborate with experienced engineers in a focused environment.
• Modern stack – TypeScript, Cloudflare infrastructure, AI workflows, distributed systems.
• Remote-first setup – flexible work with async collaboration.
• Competitive salary + equity – share in the upside as we grow.

Key skills/competency

• TypeScript
• React
• Node.js
• GraphQL
• Cloudflare Workers
• Durable Objects
• AI Platforms
• Graph Databases
• Distributed Systems
• System Architecture