Senior AI Systems Engineer - Production LLM/RAG

Nextens; Oklahoma City (OK); On-site; USD 95,000 - 159,000; Full time

Benefits offered by this job

Health benefits

401(k) with match

Wellbeing platform

Disability and life insurance

Adoption & surrogacy benefits

Commuter Spending Accounts

Paid time off + volunteer days

Job summary

Nextens is seeking a Senior AI Software Engineer to design and ship production AI systems, including agentic workflows, LLM-powered pipelines, and RAG services across multiple business units. You will translate ambiguous problems into measurable solutions, mentor junior engineers, and work with stakeholders to define requirements.

The role requires 5+ years in software engineering, 2+ years shipping LLM-based systems, strong TypeScript/Node.js or Python, and experience with AWS/Azure, Docker,

Qualifications

• 5+ years of software engineering experience, including 2+ years building and shipping LLM-based or ML-based systems to production.
• BS in Engineering/Computer Science or equivalent experience required.
• Demonstrated track record of owning an AI feature or service end to end: design, evaluation, deployment, and monitoring.
• Expert proficiency in TypeScript/Node.js and/or Python; working knowledge of C#/.NET is a plus.
• Hands-on experience with LLM platforms and APIs (Azure OpenAI or equivalent).
• Experience building RAG pipelines: chunking, embedding, hybrid retrieval, reranking, grounding/citation.
• Strong understanding of schema-driven structured extraction and validation strategies.
• Experience with evaluation frameworks for AI systems and latency/cost attribution.
• Strong SQL proficiency and relational/vector data stores (SQL Server, PostgreSQL, Elasticsearch/vector stores).
• Working experience with AWS and Azure, containerized deployment, secrets management, and observability.

Responsibilities

• Design, build, and deploy production AI systems including agentic workflows, RAG services, and extraction pipelines across multiple business units.
• Interface with business stakeholders to scope AI use cases, define success metrics, and finalize requirements.
• Write and review detailed technical specifications and architecture documents for complex AI system components.
• Build and maintain evaluation harnesses; establish accuracy, latency, and cost baselines and monitor them in production.
• Implement responsible AI practices: data handling, PII controls, hallucination mitigation, auditability, and human review where required.
• Own cost and performance of LLM workloads, including model selection, caching, and usage attribution.
• Build and maintain CI/CD pipelines and deployment automation for AI services across AWS and Azure.
• Operate in Agile environments and collaborate with engineering, product, and business functions.
• Mentor less-senior engineers on AI system design, evaluation methodology, and production readiness.

Skills

LLM features/end-to-end ownership

Python

TypeScript/Node.js

SQL

AWS

Azure

ML/AI systems

Prompt design

Education

BS in Engineering/Computer Science

Tools

Azure OpenAI

Docker

Kubernetes

Git

JSON Schema

Job description

Nextens is seeking a Senior AI Software Engineer to design and ship production AI systems, including agentic workflows, LLM-powered pipelines, and RAG services across multiple business units. You will translate ambiguous problems into measurable solutions, mentor junior engineers, and work with stakeholders to define requirements.

The role requires 5+ years in software engineering, 2+ years shipping LLM-based systems, strong TypeScript/Node.js or Python, and experience with AWS/Azure, Docker,