We are looking for a motivated Junior-to-Mid-Level PHP developer to help us build and scale AI systems within our backend ecosystem. In this role, you will work in our in-house PHP agent framework to connect Large Language Models (LLMs) to internal APIs and databases, build RAG pipelines, and develop multi-step agent workflows. Working alongside senior engineers, you will turn business logic into intelligent, automated workflows that reason, call tools, and execute multi-step tasks. This is an in-person role in Glenview, IL. This requires regular on-site work, and relocation assistance is not provided.
Core Responsibilities
Agent Implementation: Build and refine AI agents and multi-step workflows using our in-house agent framework.
API Integration: Write clean PHP code to connect commercial LLM APIs (OpenAI, Anthropic, Google) to internal REST APIs and enterprise databases, including tool calling and structured outputs.
RAG & Vector Management: Assist in building and maintaining Retrieval-Augmented Generation (RAG) pipelines using embeddings and vector search.
Testing & Evaluation: Write test scripts to evaluate agent outputs, benchmark token costs, and track down hallucinations and runaway loops.
Prompt Engineering: Design, test, and version-control system prompts, function schemas, and tool definitions for chat and batch processing.
Required Technical Skills
Programming: 1–3 years of professional experience writing clean, readable, object-oriented PHP.
API Fundamentals: Strong understanding of RESTful APIs, JSON parsing, and serialization in backend environments.
Databases: Solid SQL experience (we use Oracle, MySQL/MariaDB, and Postgres).
Version Control: Proficiency with Git and collaborative code-review workflows.
Preferred Qualifications
Hands-on experience with LLM APIs
Experience working with legacy code in a large, established codebase.
We offer our team members:
Full Time starting pay: $50-54 based on experience
Yearly performance review
Potential for advancement
Performance-based bonuses throughout the year
Medical/Dental (Blue Cross and Blue Shield PPO Network) & Vision (VSP)
401(k) (Charles Schwab) which includes a matching program
Life & Disability insurance (Lincoln Financial)
Generous Paid Time Off/Sick Pay Program
Continued training & career development
Employee discounts on all the products we sell
Summary
Build AI agents and multi-step workflows in an in-house PHP framework, connecting OpenAI, Anthropic and Google LLMs to REST APIs and enterprise databases. Requires 1-3 years of object-oriented PHP, strong REST, JSON and SQL skills with Oracle, MySQL and Postgres, plus Git proficiency.
Responsibilities
Build and refine AI agents and multi-step workflows; Connect LLM APIs to REST APIs and databases; Build RAG pipelines using embeddings and vector search; Write test scripts, benchmark token costs; Design prompts and tool definitions
Qualifications
1-3 years object-oriented PHP; RESTful APIs, JSON parsing and serialization; Solid SQL experience; Proficiency with Git and code-review workflows
Experience requirements
1-3 years of professional experience writing clean, readable, object-oriented PHP
Benefits
Medical/Dental (Blue Cross and Blue Shield PPO) & Vision (VSP); 401(k) with matching; Life & Disability insurance; Generous Paid Time Off/Sick Pay; Employee discounts