Prompt & AI Systems Engineer

Pay: $80,000.00 per yearLocation: Remote (US Only) About YourVoice-AI YourVoice-AI is a fast-growing AI technology company on a mission to improve telephone communication in the modern world. YourVoice-AI uses its proprietary voice and text platform to automate client contact at a fraction of the cost of traditional human-powered services.With proven product-market fit and a phase of rapid scaling underway, we're seeking talented individuals to join our journey. YourVoice-AI is owned by SOLD.com, a real estate technology company focused on simplifying home selling. SOLD.com was founded in 2018, and empowers homeowners with data-driven insights and personalized recommendations to save time, reduce stress, and maximize sales outcomes. SOLD.com bridges the gap between homeowners and the tools they need to navigate it. Role Overview We are building out our AI-driven voice assistant product and need someone who sits at the intersection of prompt engineering, AI agent development, and full-stack coding. This is not a pure developer role and not a pure QA role — you will own the quality, configuration, and continuous improvement of our Voice AI assistants end-to-end, while also contributing to engineering tasks and helping us mature our AI-assisted development workflow.You will report directly to the Engineering Manager and collaborate with a remote engineering team. What You'll Do Voice AI & Prompt Engineering • Audit flagged calls to identify root causes: hallucinations, incorrect logic, premature hang-ups, tone drift, interruption patterns. • Write, refine, and version-control system prompts (Markdown) stored in Git to improve AI behavior across client deployments. • Stress-test new prompts in sandbox environments before live deployment. • Manage prompt and configuration changes using Git (pull, branch, commit, push, PR). Client-Facing Responsibilities • Communicate directly with clients via email and Zoom to gather requirements, report on AI assistant performance, and deliver updates. • Translate client feedback into actionable configuration changes and prompt updates. • Document changes and link them to client-reported issues in Jira. AI Agent Development • Build and maintain AI agents and automated workflows using tools like Claude Code, Cursor, or equivalent agentic coding environments. • Help define and implement a team-wide AI-assisted development workflow — this is a strategic initiative and you will be a key contributor. • Prototype internal tooling to delegate routine coding and QA tasks to AI agents. Engineering Contributions • Review, debug, and edit code across our stack: NestJS, TypeScript, Next.js, React, MongoDB, AWS. • Contribute to pull request reviews and flag technical debt or logic issues. • Self-manage tasks in Jira: update ticket statuses, write clear bug reports, link call logs to fixes. • Participate in project huddles and team syncs. Required Qualifications • 2+ years of experience with prompt engineering for LLMs (GPT-4, Claude, or similar) — not just API usage, but systematic prompt design and iteration. • Hands-on experience with agentic AI tools: Claude Code, Cursor, or equivalent. • Demonstrated experience building or training AI agents for real workflows. • Proficiency with Git: branching, committing, pull requests, resolving conflicts. • Proficiency in Markdown for structured documentation and prompt management. • Ability to read, review, and make targeted edits to TypeScript/JavaScript codebases (NestJS, Next.js, React). • Strong written and verbal English communication skills — you will be client-facing. • Logical troubleshooting mindset: able to distinguish between prompt issues, config issues, and code bugs. • Comfortable working async and self-managing in a remote environment with Pacific Time Zone availability. Nice to Have • Experience with Voice AI platforms or telephony APIs (Twilio, Vapi, or similar). • Background in conversational design or linguistics. • Experience integrating with OpenAI, Anthropic, or other LLM APIs. • Familiarity with AWS, Docker, or CI/CD pipelines. • Experience with Jira, Bitbucket, or Atlassian tooling. • Basic understanding of JSON and REST API structures. • Real estate or proptech domain knowledge. Why Join Us?You'll have direct influence over how we build and scale AI-assisted workflows — both for our clients and internally. This role is a ground-floor opportunity to shape how a real estate tech company operationalizes AI agents across its engineering team. You'll work with a tight-knit, experienced team, report to an Engineering Manager who writes code, and have real ownership over your domain. Position Details • Hours: 40 hours per week • Location: Fully remote • Tools: Twilio, Vapi, OpenAI, Claude Code, Jira, Bitbucket, AWS