Senior Staff AI Platform Engineer – Content Intelligence

Arc XP; Washington (District of Columbia); On-site; USD 145,000 - 241,000; Full time

Benefits offered by this job

Medical, dental, vision coverage

Pension and 401(k) match

Generous vacation & holidays

Paid parental leave

Mental health resources

Job summary

Arc XP is the AI-powered content platform powering media publishers worldwide. We seek a Senior Staff Software Engineer to set technical direction for our AI platform, including model routing, vector storage, and agentic runtimes.

You will write designs, ship the hardest parts, and ensure scalability across tenants, languages, and regions. You will lead architectural initiatives, drive secure, cost-aware deployments, and own release ownership and on-call practices while mentoring engineers and

Qualifications

• 8+ years designing, building, and operating backend distributed systems.
• Ability to lead across teams and set technical direction with accountability for outcomes.
• Strong Python production API development experience (FastAPI or equivalent).
• Deep AWS experience across Lambda, ECS, S3, CloudFront, DynamoDB, Bedrock, CodePipeline/CodeBuild.
• Experience with infrastructure as code frameworks (Terraform, OpenTofu, Terragrunt, CloudFormation).
• Hands-on experience building production AI systems (model routing, retrieval, embeddings, guardrails).

Responsibilities

• Own the end-to-end platform design and lead major architectural changes across systems.
• Own release trains from test to production across regions, including on-call rotations.
• Define and track key metrics for system health, reliability, and business workflows.
• Mentor engineers through hands-on collaboration and design reviews; lead architecture discussions.

Skills

Backend architecture leadership

Python production API

AWS expertise

Technical leadership

Communication & runbooks

Tools

Terraform

OpenTofu

Terragrunt

CloudFormation

OpenAPI / API design

Job description

Arc XP is the AI-powered content platform powering media publishers worldwide. We seek a Senior Staff Software Engineer to set technical direction for our AI platform, including model routing, vector storage, and agentic runtimes.

You will write designs, ship the hardest parts, and ensure scalability across tenants, languages, and regions. You will lead architectural initiatives, drive secure, cost-aware deployments, and own release ownership and on-call practices while mentoring engineers and