About O3XO
O3XO is the AI consulting division of O3 World, a Philadelphia-based digital consultancy with nearly two decades of experience building web applications for enterprise clients. We help business leaders move past the hype and focus on practical AI implementation, connecting client data, workflows, and systems to large language models in ways that create real operational value.
Overview
This is a lead role on live client engagements. You will own one or two accounts end-to-end, from discovery through production, and you will build the solution yourself. Our clients are mid-market and enterprise businesses.
What we are really looking for
You can ship a production LLM application on your own, you can integrate it with the client’s system of record, and you can sit on the client call and explain what you built, what it does, what it needs, and what it takes to run it. Prompt engineering, retrieval, and agentic workflows need to be things you have run in production and measured, not just read about.
The integration work is usually the hard part. Our engagements land on Salesforce, HubSpot, Snowflake, SharePoint, and Procore, and the AI layer is only ever as good as the plumbing underneath it.
Responsibilities
Own delivery on assigned accounts, including scope, release timing, and the day to day client relationship
Lead discovery sessions and translate business needs into prioritized use cases, build-hour estimates, and run-cost projections
Build and ship production LLM applications, typically Next.js full stack with the Vercel AI SDK, or Python services
Implement context engineering: retrieval, hybrid and agentic search, prompt caching, tool use, and MCP where it fits
Build and maintain eval harnesses, define the accuracy metrics that reflect the client’s actual workflow, and report movement on them
Integrate client systems of record, including Salesforce (Apex, LWC, triggers, OAuth), HubSpot, Snowflake, SharePoint, and Procore
Deploy and operate on Vercel, Azure or AWS, including autoscaling, deployment slots, error monitoring, and monthly infrastructure and token cost reporting
Run client calls and demos unaccompanied, write architecture and decision documents, and publish your own recaps with owners and next steps
Handle client data in accordance with enterprise security standards and relevant privacy regulations
You must have
5+ years building and deploying production software, including 3+ years shipping LLM-powered applications to real users
Demonstrated ability to lead a client engagement and communicate technical tradeoffs to non-technical executives
AI: Anthropic and OpenAI APIs, agent frameworks, MCP, prompt caching, evaluation design
Programming: TypeScript/JavaScript, Python, SQL
Frontend: Next.js, React
Cloud: production deployment and operations on Azure or AWS, both serverless and container based
Data: SQL databases plus vector and hybrid search (Supabase, Postgres, Azure AI Search, pgvector, Pinecone, Chroma)
Integration: at least one enterprise system of record at depth, Salesforce strongly preferred
Excellent written and spoken English, and comfort being the only O3XO person on a client call
Meaningful overlap with US Eastern business hours
Nice to have
Apex and Lightning Web Component development
Snowflake, including Snowpark Container Services
Microsoft Copilot Studio and the Power Platform, for clients who mandate it
Infrastructure as code (Terraform, CDK, Bicep) and CI/CD
Document AI and OCR pipelines
Data privacy and compliance experience (GDPR, CCPA, HIPAA)
Details
Contract, 30 to 40 hours per week, immediate start. This is a fully remote role. Nearshore LATAM welcome, with meaningful overlap with US Eastern hours for client calls and releases.