Senior Full Stack Engineer - AI - ActiveCampaign Hilos

📋 Description

• • Own the end-to-end design and delivery of AI-driven features inside ActiveCampaign Hilos, the WhatsApp-first CRM that is redefining how businesses converse with customers. You will architect and ship production-grade AI agents that feel natural in chat yet reliably hit business goals such as lead qualification, support deflection, and upsell.
• • Re-imagine our flow-builder so non-technical marketers can drag-and-drop an “AI step” that handles memory, persona, guardrails, and hallucination mitigation under the hood. Your UX decisions will directly determine how thousands of SMBs adopt conversational AI.
• • Build the observability layer that lets users inspect every model call, A/B test prompts, and roll back versions in one click. Think Datadog for LLMs—real-time token usage, latency, and outcome metrics surfaced in-product.
• • Push the envelope on structured data extraction inside free-form WhatsApp chats. Example: a user types “I need two large pepperoni pies delivered to 123 Main St,” and your pipeline returns `{ "qty": 2, "product": "pepperoni", "size": "large", "address": "123 Main St" }` without ever breaking the conversational flow.
• • Design resilient, multi-tenant infrastructure on AWS + Kubernetes that scales to millions of WhatsApp messages per day while keeping per-message costs low. You will choose when to use GPT-4, Claude, or a fine-tuned Llama model based on cost, latency, and accuracy SLAs.
• • Act as the team’s AI evangelist: run fortnightly “prompt jams,” create internal cookbooks, and mentor backend and frontend engineers on prompt engineering, eval frameworks, and safe deployment practices.
• • Collaborate daily with Product, Sales, and Support to translate anecdotal customer pain into sprint-ready user stories. You are comfortable jumping on a call with a Mexican restaurant owner at 9 a.m. and shipping a fix by 3 p.m.
• • Maintain a “startup MVP” mindset—ship behind a feature flag, measure activation within 48 hours, and iterate. Perfect is the enemy of live.
• • Champion code quality: 90 % unit-test coverage on new Python services, typed React components, and rigorous PR reviews. You balance speed with maintainability.
• • Contribute to the broader ActiveCampaign AI guild, sharing reusable prompt templates, eval datasets, and cost-optimization tactics across product lines.