Staff Platform Architect

Vantage 9 is an early stage, profitable logistics SaaS company that manages logistics for enterprise retailers, 3PLs, and manufacturers. They are seeking a senior individual contributor to lead the design and implementation of their agent-native platform initiative, focusing on architecting capabilities for AI agents within their platform.

Responsibilities:

• You are a senior individual contributor reporting directly to the CTO, leading the design and implementation of Vantage 9's agent-native platform initiative
• This is a hands-on role. You will write production code daily, steward our Architecture Decision Records (ADRs), and ensure the foundations we build today can navigate enterprise scale
• You will architect and build the platform capabilities that let AI agents operate as first-class citizens of our platform
• Working out what this should look like in our MACH composable platform is the core of the role
• The problem areas you'll design through include identity, authorization, governance, multi-customer isolation, integration contracts, and platform evolution
• You will propose these design decisions, write production code, and work alongside our engineering teams
• This is hands-on engineering, not architecture-by-document. You write production code daily
• This role cycles through three other modes as platform priorities shift:
• You will help with hardening and scaling: performance, reliability, observability, security, quality
• You will ship new capabilities that broaden our platform's surface area. This could be data services, integration patterns, or new modules
• You will build customer-specific applications on top of the platform alongside our delivery teams
• You should be the kind of engineer who finds this mix energizing rather than disorienting
• Day 1: Use AI to grok our codebase for context, merge your first PR, and ship production code
• Day 14: Shipped a meaningful, measurable improvement to a core platform service or tenant application
• Day 30: Mapped the platform and tenant application landscape end to end. Drafted the first ADRs on agent-native design and opened them for engineering team review
• Day 60: First production implementation of agent-native patterns merged and running. Documented well enough that other engineers can build on them
• Day 90: A piece of the agent-native foundation in production and load-bearing. At least one other module, agent, or customer integration depends on it