Principal AI Platform Architect & Full-Stack Engineer

TechDigital Group; New York (NY); On-site; USD 180,000 - 280,000; Full time

Job summary

TechDigital Group is seeking a Principal/Staff level engineer to own reference architecture and build the hardest lifecycle registries, AI control-plane services, and builder agents for a scalable enterprise platform. You will champion portability, multi-provider model abstraction, and memory/skills services.

You will lead design reviews, mentor senior engineers, and deliver platform features as autonomous agents, ensuring production-grade reliability and security-by-design as you scale complex

Qualifications

• Principal-level full-stack — you build production services end to end (backend, APIs, and enough frontend to ship the registry and dev UIs) and you own systems in production.
• Distributed systems & platform engineering — Kubernetes, containers, IaC (Terraform), CI/CD, secrets/RBAC, and multi-tenant service design.
• Cloud depth with a portable mindset — strong on GCP (GKE, Vertex AI, IAM, VPC Service Controls, BigQuery), but standards-first by instinct.
• Hands-on GenAI / agentic engineering — LLM and agent runtimes, multi-agent and sub-agent orchestration, A2A and MCP/tool integration, retrieval/RAG, memory systems, and end-to-end builder agents.
• Security & governance by design — identity-aware access, PII/PHI handling, runtime guardrails, gateway/policy-as-code, and audit/observability.
• AI-assisted engineering — fluent and effective with AI coding tools (Cursor, Claude Code, Copilot, Windsurf or equivalent), and able to define the patterns and review discipline the team uses with them.
• Strong software engineering background — strong Python (and typically one of Go / Java / TypeScript).

Responsibilities

• Own the paved road — the reference architecture and the reusable registration pattern behind every asset (registration schema, semantic metadata, I/O contract, execution binding, governance constraints) so the agent, model, tool, workflow and skill registries all share one shape.
• Personally build the hardest pieces — the lifecycle registries; the AI control-plane services that plug into the enterprise gateway (registries, PII/PHI and prompt-injection scanning as a gateway policy, token-aware metering and multi-vendor cost attribution, AI trace/observability, and the multi-provider model-abstraction layer behind its fail-over); and the harness/memory & skills services.
• Build the agent-building paved road — the scaffolds, patterns and sub-agent topologies the team uses to stand up new agents fast, including the end-to-end builder agent (architect → provision → implement → test sub-agent → deploy → post-process → log).
• Deliver platform features as agents where it fits (e.g. a lifecycle-management agent, a skills-planning agent) — so the platform builds and operates itself, not just exposes CRUD APIs.
• Enforce portability in code — containerize everything; standardize lineage on MLflow + metadata, telemetry on OpenTelemetry, table formats on Delta UniForm / Iceberg, and open-weight serving on vLLM/Ray/DeepSpeed.
• Set the engineering bar — testing, CI/CD, IaC and security-by-default standards; review the team's hardest designs and pull requests; mentor the senior engineers.
• Build with AI and build agents end to end — like everyone on the team.

Skills

Distributed systems

GenAI engineering

AI-assisted engineering

Security by design

Cloud engineering

Python

Full-stack development

Tools

Kubernetes

Containers

Terraform

CI/CD

RBAC

Job description

TechDigital Group is seeking a Principal/Staff level engineer to own reference architecture and build the hardest lifecycle registries, AI control-plane services, and builder agents for a scalable enterprise platform. You will champion portability, multi-provider model abstraction, and memory/skills services.

You will lead design reviews, mentor senior engineers, and deliver platform features as autonomous agents, ensuring production-grade reliability and security-by-design as you scale complex