We’re changing the game with a first-of-its-kind, conversation-centric platform that unifies team collaboration and customer experience in one place. Powered by AI, built by amazing humans.
Our culture is forward-thinking, customer-obsessed and built on an unwavering belief that connection fuels business and life; connections to our customers with our signature Amazing Service®, our products and services, and most importantly, each other. Since 2008, 100,000+ companies and 1M+ users rely on Nextiva for customer and team communication.
If you’re ready to collaborate and create with amazing people, let your personality shine and be on the frontlines of helping businesses deliver amazing experiences, you’re in the right place.
Build Amazing - Deliver Amazing - Live Amazing - Be Amazing
We’re looking for a highly skilled and hands-on RAG (Retrieval-Augmented Generation) & Prompt Engineer to join our applied AI team. You’ll work with cutting-edge open-source and proprietary LLMs (like LLaMA, Mistral, Claude, GPT-4o, etc.) to build, prompt, and orchestrate intelligent agents that are capable, reliable, and production-ready.
This role is perfect for someone who has experience developing prompt chains, implementing tool-calling workflows, and debugging AI agents at scale.
Key Responsibilities
- Design, develop, and iterate on prompt strategies tailored to downloadable models and major APIs (LLaMA, Mistral, Claude, GPT-4o, etc.).
- Architect and implement RAG pipelines with a deep understanding of embedding models, retrievers, and context optimization techniques.
- Create prompt chains and tool-calling workflows for dynamic agent behavior using Responses API and similar frameworks.
- Design, test, and deploy foolproof agent architectures using OpenAI tool calling and agent protocol layers.
- Write robust Guardrails and control flows for agents to prevent unintended behaviors and ensure task compliance.
- Debug and maintain agent codebases, ensuring reliability and scalability of deployed services.
- Apply basic knowledge of OpenAI Operator and related orchestration tools to manage agent lifecycle.
- Collaborate with researchers and infra teams to optimize prompt efficiency and latency.
Must-Have Qualifications
- 3 - 5 years of experience in AI engineering, prompt engineering, or applied ML roles.
- Proven experience working with both downloadable open-source models and hosted APIs.
- Strong knowledge of LLM prompt design patterns, prompt chaining, and failure handling.
- Ability to build agent systems that are secure, auditable, and self-healing.
- Good coding and debugging skills in Python (or relevant stack) with focus on AI orchestration.
- Familiarity with agent deployment pipelines, containerized environments, and CI/CD flows.
Tech Stack We Use
- Python, FastAPI, LangChain / LlamaIndex.
- OpenAI, Anthropic, HuggingFace.
- Vector DBs (Weaviate, Pinecone, Qdrant).
- Responses API, OpenAI Operator, A2A SDK.
- Docker, GitHub Actions, GCP/AWS.
Bonus (Nice-to-Have Skills)
- Experience building agents from scratch, especially with agent transfer logic and persistent memory.
- Understanding of Model Context Protocols and how to integrate them into multi-agent LLM stacks.
- Familiarity with A2A SDK for agent-to-agent communication and delegation.
- Hands-on experience with LoRA / QLoRA techniques for fine-tuning GPT-style models on downstream or domain-specific tasks.
- Experience with vector DBs, context compression, or multi-turn reasoning at scale.
#LI-SC1 #LI-Hybrid
Top Skills
What We Do
Nextiva is a communications company that helps businesses build deeper connections with their customers. Nextiva combines communication channels — voice, video, collaboration, SMS, and surveys — to help businesses access the information they need at the right time to know their customers and drive business results.
Recognition and Awards
2022 | Comparably’s Best Leadership Team
2022 | Comparably’s Best CEOs for Women
2022 | Comparably’s Best Global Company Culture
2022 | Comparably’s Best Places to Work in Phoenix
2021 | LinkedIn Employee Engagement Champion
2021 | Comparably’s Best Compensation
2021 | Comparably’s Best Company Culture
2021 | Comparably’s Best CEO
U.S. News & World Report: Best Business Phone Service of 2020
2020 | Stevie Awards for Sales & Customer Service - Gold, Bronze, and Silver
2020 | Phoenix Business Journal Largest Phoenix-Area Software Firm
2019 | U.S. News & World Report Best Overall Business Phone Service
2019 | Glassdoor Top 100 Best Places to Work
2019 | Comparably’s Best Compensation
2019 | Comparably’s Best Company Outlook
2019 | Comparably’s Best Product Team
2019 | Comparably’s Best Marketing Team
2019 | Frost & Sullivan Customer Value Leadership
2019 | Gartner Peer Insights Voice of the Customer
2019 | Deloitte Technology Fast 500
2019 | azcentral.com Top Companies to Work For in Arizona
2019 | Phoenix Business Journal Healthiest Employer
2019, 2018 | Phoenix Business Journal Largest Software Firm in Phoenix
2018 | Spirit of Enterprise - ASU
2018 | Aragon Globe Innovator - Aragon Research
2018 | Mobile VoIP App of the Year - Mobile Breakthrough Awards
2018 | Comparably’s Best Company Culture
Why Work With Us
Our values are simple: Caring, Forward-thinking, and Simplicity.
_ We deeply care about people and our mission.
_ We dream big and work hard together towards it.
_ We strive to make life easier for people.
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