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# Founding Software Architect (Mission Control) - Fulltime - US-based

- **Company:** Arc Full-time
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** LangGraph Framework, Artificial Intelligence, Audit Trail, Software as a Service, Data Centers, Data Security, Data Stores, Distributed Systems, Federal Information Processing Standards (FIPS), Key Management, OpenStack, Role-Based Access Control, Single Sign-On, Systems Architecture, Technical Data Management Systems, Graphics Processing Unit (GPU), Large Language Models, State Machines, Backend, Build Management, Kubernetes
- **Published:** November 13, 2026
- **Apply:** https://arc.dev/signup?userType=developer&publicRandomKey=pz62snlxf5&to=https%3A%2F%2Farc.dev%2Fdashboard%2Fd%2Fverified-jobs%2Fpz62snlxf5%2Fapplication

## About the Role

* Staff-level engineering experience (typically 8+ years), including technical leadership of a team
 * Has shipped and operated production distributed systems
 * Has led the architecture of a multi-tenant SaaS product, including tenant isolation and per-tenant data security
 * Hands-on experience building LLM agent systems in production: orchestration, tool use, evaluation
 * Strong Kubernetes / container experience; designs for portability across cloud providers
 * Solid security fundamentals: RBAC / SSO, encryption and key management, audit logging, tenant isolation
 * Wants to build hands-on at a pre-seed company, not only direct others
 * Based in the US, * Has architected an on-prem, air-gapped or single-tenant self-hosted product (offline install and updates, customer-held keys)
 * Experience at a forward-deployed-engineering (FDE) model company
 * Deployments in regulated industries: government, defense, critical infrastructure (FedRAMP, ITAR, SOC 2)
 * Durable workflow engines (e.g. Temporal) and append-only or event-sourced data stores
 * Serving open-weight models on customer GPUs
 * Domain exposure to robotics, data centers / construction or aerospace manufacturing
 * Eligible to access export-controlled (ITAR) technical data

## Description

You are the first engineering hire. You own the technical design of the Mission Control core and make the final engineering calls. You build hands-on from day one, and you lead a team of about eight engineers (backend / platform, AI / agent, infrastructure / security, full-stack) as they join.

The target: a working core on all three deployment targets within the first three months, then three production templates and first design-partner missions by month six.

What you'll do

 * Turn our architecture requirements and prototype PRD into the system architecture
 * Make the open stack decisions: agent framework (e.g. LangGraph, NVIDIA AI-Q / NeMo Agent Toolkit or alternatives), durable execution (e.g. Temporal), multi-tenant sandboxing, evidence-ledger storage and GPU sizing for open-weight models
 * Design and build the core: the mission object and lifecycle state machine, approval gates (G0-G6) enforced as policy-as-data, a kill switch, the planner and configurable agent roles, checkpoint / resume for missions that run hours to weeks, and budget metering
 * Design the append-only evidence ledger, claim-to-evidence tracing and an independent verification layer that enforces our evidence standard
 * Architect one codebase for three targets: multi-tenant hosted with per-tenant keys and strict isolation; single-tenant client cloud with client-held keys; air-gapped with offline install and update packages and zero outbound network calls
 * Build the model gateway that routes work across frontier and open-weight models by capability, cost, data class and policy
 * Set coding, security and review standards; design toward SOC 2 / ISO 27001 from day one, and keep the architecture ready for export-control (ITAR) requirements: US-persons-only access, US-resident compute and FIPS-validated encryption as configurable policy
 * Hire and lead the engineering team through the core build, working closely with the product / operations lead and our forward-deployed engineers