# AI Platform Engineer

**Company:** [Forterra](https://hotfix.jobs/companies/forterra)
**Location:** Arlington, VA
**Role:** ML Engineering
**Salary:** $125k – $145k/yr
**Experience:** 3+ years
**Skills:** Python, Mcp, LLMs, Tool Calling, Retrieval, Multi-Agent Orchestration, CI/CD, Linux, Oauth2, OIDC, SAML, Machine Learning, Deep Learning, Dpo, Qlora
**Posted:** 2026-08-07

> Build and operate production agentic infrastructure, evaluation systems, guardrails, and enterprise integrations that enable safe, observable AI-assisted engineering. The role requires 3+ years of software development experience, recent LLM or agentic systems depth, strong Python and production operations skills, and sound judgment about automation and trustworthiness.

## Job Description

## Responsibilities
- Design and operate agentic systems, including agent definitions, skills, MCP servers, guardrails, evaluation harnesses, and multi-agent architectures.
- Build shared, versioned engineering infrastructure for interactive, scheduled, event-driven, and unattended agent workloads.
- Define autonomy levels, bounded scopes, idempotent reruns, escalation paths, human-in-the-loop controls, observability, and credential boundaries.
- Evaluate AI tooling through controlled trials, ablation studies, blinded judges, contamination controls, uncertainty reporting, and quality/cost/turn measurement.
- Implement layered redaction, egress filtering, data-layer enforcement, and controls for agents handling controlled information.
- Integrate agent tooling with enterprise requirements management, issue tracking, documentation, source control, identity, authorization, and unstructured data systems.
- Run production services with uptime expectations, incident response, and root-cause analysis.
- Drive adoption through onboarding, curricula, setup automation, self-diagnosing tooling, standards, code review, and contributor enablement.

## Requirements
- 3+ years building software systems, including recent depth in LLM-based or agentic systems.
- Fluency with tool/function calling, MCP or equivalent protocols, context management, retrieval, multi-agent orchestration, and policy-enforcement middleware.
- Judgment regarding model selection and cost, latency, and quality tradeoffs.
- Experience rigorously evaluating AI system quality and analyzing unstructured data.
- Experience running production non-interactive workloads such as CI pipelines, scheduled jobs, or event-driven triggers.
- Strong Python skills and comfort with shell, CI, and Linux service operations.
- Experience building and maintaining production applications.
- Working knowledge of enterprise identity and authorization, including OAuth2/OIDC/SAML, tokens, scopes, and least privilege.
- Excellent written and oral communication.

## Nice-to-haves
- Statistics, classical machine learning, and deep learning.
- LLM fine-tuning on codebases and enterprise data, including DPO, QLoRA, or GRPO.
- Contributions to open-source agent harnesses.
- Knowledge graphs, ontologies, or retrieval architecture for heterogeneous enterprise data.
- Software engineering productivity metrics and measurement.
- Internal developer platforms or enablement functions.
- Systems engineering, safety engineering, or verification and validation.
- AI systems in regulated, classified, or export-controlled environments, including CUI, ITAR, NIST 800-171, FedRAMP, or GovCloud.
- Human-in-the-loop review gates for automated systems.
- Published or open-source work on agent evaluation methodology.
- Robotics, autonomy, or safety-critical software development.

## Compensation
- US salary range: **$125,000 - $145,000**.
- Equity is included in most full-time, high-demand roles.
- Competitive full-time employee benefits are offered.

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