Senior Software Engineer, AI Platform

iSolved HCM; Charlotte (NC); On-site; USD 150,000 - 210,000; Full time

Job summary

isolved is seeking a Senior Software Engineer, AI Platform to own program execution and steer a team of ~20 engineers across Tax, Benefits, Time, Payroll, and Shared Logic, with two Engineering Managers and a Data Architect.

The role blends delivery leadership with deep technical involvement, driving scalable LLM gateway design, RAG pipelines, AI observability, governance, and SDKs for Python, .NET, and TypeScript.

Qualifications

• 5+ years of professional software engineering experience, with Python as primary language.
• 2+ years building production LLM-powered systems - inference, RAG, agentic patterns, or AI infrastructure.
• Deep Python expertise as primary language for AI platform work.
• Working proficiency in C#/.NET to support interop across teams.
• Strong hands-on experience with agentic frameworks such as Semantic Kernel, LangGraph, LangChain.
• Production experience with RAG architecture: chunking, embeddings, vector search, retrieval quality, and failure modes.
• Azure AI Foundry / Azure OpenAI experience - deployment, API integration, observability tooling.
• Experience building internal platforms or SDKs that other engineers depend on.

Responsibilities

• Design and build a scalable LLM gateway with model routing, prompt management, cost attribution, rate limiting, and caching.
• Develop and operate RAG pipelines, embedding services, and vector search infrastructure.
• Implement platform-level cost optimization strategies and semantic caching.
• Build and maintain agentic runtime infrastructure, including orchestration and state management.
• Create developer-friendly SDKs across languages (Python, .NET, TypeScript).
• Define paved road patterns for common AI use cases and onboarding of product teams.
• Establish AI observability, including usage, latency, cost tracking, and distributed tracing.

Skills

Python

LLM-powered systems

C#/.NET

Agentic frameworks

Azure AI/OpenAI

Observability

SDK development

Tools

Semantic Kernel

LangGraph

LangChain

Job description

Why Work Here

• Headquarters is in Charlotte, NC
• Recently expanded to nearshore
• isolved ranked for SMB Payroll in 2023 Sapient Report
• Voted top places to work in USA 2023

Job Description

The isolved Senior Software Engineer, AI Platform role owns both program execution and technical direction, leading ~20 engineers across domain teams (Tax, Benefits, Time, Payroll, Shared Logic), alongside two Engineering Managers and a Data Architect. The position blends delivery leadership with deep technical involvement, serving as a key decision-maker, escalation point for complex challenges, and ultimate owner of program outcomes.

Core Job Duties

• Design and build a scalable LLM gateway with model routing, prompt management, cost attribution, rate limiting, and caching
• Develop and operate RAG pipelines, embedding services, and vector search infrastructure for platform-wide use
• Implement platform-level cost optimization strategies, including semantic caching and model selection by workload
• Build and maintain agentic runtime infrastructure, including orchestration, state management, and human-in-the-loop patterns
• Develop extensible MCP server and tool ecosystems for product team integration
• Design and support multi-agent coordination patterns using modern frameworks and protocols
• Establish comprehensive AI observability, including usage, latency, cost tracking, and distributed tracing
• Implement AI governance controls, including access management, audit logging, content filtering, and security protections
• Build AI incident detection and response capabilities, including monitoring for failures, hallucinations, and cost anomalies
• Create developer-friendly SDKs across languages (Python, .NET, TypeScript) to simplify platform adoption
• Define "paved road" patterns for common AI use cases and support onboarding of product teams
• Build automated evaluation pipelines and continuously monitor production quality and model performance

Minimum Qualifications

• 5+ years of professional software engineering experience, with Python as your primary language
• 2+ years building production LLM-powered systems - inference, RAG, agentic patterns, or AI infrastructure
• Deep Python expertise - this is the primary language for AI platform work
• Working proficiency in C#/.NET - the platform serves teams that live in C#, so interop is real and matters
• Strong hands-on experience with agentic frameworks - Semantic Kernel, LangGraph, LangChain, or you've built your own
• Production experience with RAG architecture: chunking strategies, embedding models, vector search, retrieval quality, and the failure modes that don't show up in demos
• Azure AI Foundry / Azure OpenAI experience - model deployment, API integration, observability tooling
• Experience building internal platforms or SDKs that other engineers depend on - you understand what makes a platform feel good to use
• Strong grasp of AI observability: token usage, latency, cost tracking, and distributed tracing across multi-agent workflows

Preferred:

• Experience with TypeScript and building developer SDKs or tooling
• Hands-on experience with AI evaluation frameworks (LLM-as-judge, automated regression testing)
• Knowledge of AI governance practices, including access control, audit logging, and security safeguards
• Familiarity with container-based deployments (e.g., Azure Container Apps) and infrastructure-as-code (Terraform)
• Awareness of AI regulatory frameworks such as NIST AI RMF or ISO/IEC 42001

About isolved

isolved is a leading provider of human capital management (HCM) solutions that combines modern technology with expert services and support. Purpose-built for People Heroes™, isolved gives HR, payroll and benefits leaders the tools and insights to streamline operations and deliver employee experiences that matter. isolved People Cloud™ is a connected HCM platform with built-in artificial intelligence (AI) and analytics that brings together HR, payroll, benefits, workforce management and talent management in one experience. Built on a legacy of 40 years in the market, isolved is trusted by more than 200,000 employers and used by 9 million U.S. employees, representing about one in 20 American workers. Visit www.isolvedhcm.com.

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