Principal Software Engineer, AI Platform

This is a remote role, but it is only open to candidates located in the U.S. and authorized to work in the U.S. Why Work Here Headquarters is in Charlotte, NCRecently expanded to nearshoreisolved ranked for SMB Payroll in 2023 Sapient ReportVoted 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 cachingDevelop and operate RAG pipelines, embedding services, and vector search infrastructure for platform-wide useImplement platform-level cost optimization strategies, including semantic caching and model selection by workloadBuild and maintain agentic runtime infrastructure, including orchestration, state management, and human-in-the-loop patternsDevelop extensible MCP server and tool ecosystems for product team integrationDesign and support multi-agent coordination patterns using modern frameworks and protocolsEstablish comprehensive AI observability, including usage, latency, cost tracking, and distributed tracingImplement AI governance controls, including access management, audit logging, content filtering, and security protectionsBuild AI incident detection and response capabilities, including monitoring for failures, hallucinations, and cost anomaliesCreate developer-friendly SDKs across languages (Python, .NET, TypeScript) to simplify platform adoptionDefine "paved road" patterns for common AI use cases and support onboarding of product teamsBuild automated evaluation pipelines and continuously monitor production quality and model performance Minimum Qualifications Remote | U.S.-Based Candidates Only5+ years of professional software engineering experience, with Python as your primary language2+ years building production LLM-powered systems - inference, RAG, agentic patterns, or AI infrastructureDeep Python expertise - this is the primary language for AI platform workWorking proficiency in C#/.NET - the platform serves teams that live in C#, so interop is real and mattersStrong hands-on experience with agentic frameworks - Semantic Kernel, LangGraph, LangChain, or you've built your ownProduction experience with RAG architecture: chunking strategies, embedding models, vector search, retrieval quality, and the failure modes that don't show up in demosAzure AI Foundry / Azure OpenAI experience - model deployment, API integration, observability toolingExperience building internal platforms or SDKs that other engineers depend on - you understand what makes a platform feel good to useStrong grasp of AI observability: token usage, latency, cost tracking, and distributed tracing across multi-agent workflowsPreferred:Experience with TypeScript and building developer SDKs or toolingHands-on experience with AI evaluation frameworks (LLM-as-judge, automated regression testing)Knowledge of AI governance practices, including access control, audit logging, and security safeguardsFamiliarity 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. EEO Statement isolved is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status. isolved is a progressive and open-minded meritocracy. If you are smart and good at what you do, come as you are. Disability Accommodation Visit www.isolvedhcm.com/careers for more information regarding our incredible culture and focus on our employee experience. Visit www.isolvedeebenefits.com for a comprehensive list of our employee total rewards offerings. Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions outlined above.