Senior Fullstack Architect (AI) – Remote (Colombia or Costa Rica)

About the role

We are seeking a Senior Fullstack Architect to lead the technical design of AdVise, a campaign‑management platform that operates thousands of Google Ads and Meta accounts for automotive dealerships. The role is remote and limited to candidates in Colombia or Costa Rica.

Key responsibilities

• Act as the single design authority, documenting decisions in architecture decision records and a shared decision log.
• Define the provider‑neutral desired‑state model, governed write‑path contract, and precedence rules across systems.
• Design the rules engine, security and identity model, and integration architecture for Google Ads, Meta, Salesforce, Snowflake and client data sources.
• Choose operational store, queueing, orchestration and AWS component build‑versus‑buy strategy.
• Set non‑functional targets for scale, latency, recovery and validate them through load testing.
• Own the AI Harness architecture, guardrails, human‑review gates and future AI agent capabilities.
• Lead technical spikes, design and code reviews, and ensure documentation for client handover.

Required profile

• Senior‑level experience as a solutions or software architect on production platforms integrating external systems at scale.
• Proven ability to design transactional, auditable write paths with idempotency, partial‑failure handling and concurrency control.
• Strong understanding of event‑driven architectures, queues, workflow orchestration and rate‑limited third‑party APIs.
• Experience delivering fixed‑price, milestone‑based engagements and communicating technical decisions to executives.

Required skills

• AWS cloud architecture (or comparable major cloud platform)
• Infrastructure as Code, CI/CD, observability and production support
• Vue.js, PHP, Laravel (sufficient to review designs and code)
• SQL, relational data modelling, data contracts, Snowflake
• Salesforce integration, Google Ads API, Meta Marketing API
• Security architecture: authentication, authorization, role‑based access, service identities, secret management
• Experience with AI‑assisted workflows, guardrails, human‑review gates and model management