Lead AI Systems Architect (Full-Stack)
Company: FEFA, LLC
Location: Austin
Posted on: February 15, 2026
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Job Description:
Job Description Job Description Lead AI Systems Architect
(Full-Stack) MPF Federal/FEFA LLC is seeking a hands-on, Lead AI
Systems Architect to design and build sophisticated AI applications
from the ground up. This role is for a builder who thrives in
ambiguity, takes ownership of architectural decisions, and is eager
to deliver high-impact products at speed within government and
heavily regulated environments. In this role you will own the
end-to-end development of AI-enabled applications that bridge the
gaps between complex data ingestion, machine learning models, and
advanced front-end visualizations. What You’ll Do · Architect &
Build from Scratch: Lead the design and development of AI-driven
tools optimized for deployment across AWS, Azure, and Google Cloud.
· Execute in Multi-Cloud Governance Structures: Build products that
ensure operational discipline and robust governance across diverse
cloud ecosystems. · Create Advanced Full-Stack Orchestration:
Develop end-to-end applications where the frontend serves as a
real-time Decision Support Interface and the backend functions as a
high-concurrency engine. · Exploit Real-Time Data & API
Architecture: Design asynchronous APIs capable of handling live,
multi-modal data ingestion from diverse sources. · Employ Stateful
System Design: Architect complex system states where variables are
collected, analyzed, and orchestrated in real-time to drive
predictive outcomes. · Deliver Cloud-Agnostic Deployment: Ensure
seamless application performance and portability across a
multi-cloud landscape. Required Qualifications · 10 years in
full-stack development, with at least 4 years specifically focused
on AI/ML integration. · Proven success building and deploying
applications in secure, multi-tenant cloud environments. ·
Experience designing unified data stacks that synchronize
real-world human interactions with virtual system states in
real-time. · A track record of developing autonomous AI agents
using frameworks such as LangGraph, AutoGen, or CrewAI to
orchestrate complex, multi-step workflows. · Experience building
pipelines for diverse data types (text, telemetry, and unstructured
audio) to drive real-time system updates. · Proficiency in
designing agent-based models and utilizing Reinforcement Learning
to simulate complex decision-making cycles. · Deep LLM & Vector
expertise, leveraging LLMs for dynamic content generation and
utilizing vector databases to manage contextual memory. ·
Demonstrated ability to operate as a self-starter, managing
technical debt and architectural trade-offs independently. ·
Experience navigating the technical and security constraints of
government or heavily regulated industries. · U.S. Citizenship
Required. Why MPF Federal/FEFA, LLC · Build real AI products with
real-world federal impact. · High trust, low bureaucracy; engineers
are empowered to build. · Opportunity to shape greenfield systems
and MVPs, not just maintain legacy tools. · Work alongside a team
that values execution, curiosity, and ownership.
Keywords: FEFA, LLC, San Marcos , Lead AI Systems Architect (Full-Stack), IT / Software / Systems , Austin, Texas
