Weekday Ai Prompt Writer Jobs in Riverside, CA (NOW HIRING)

Job Title: Sr. AI Agent / Prompt Engineer

Hyundai Capital America (HCA) helps people move forward. Through Hyundai Motor Finance, Genesis Finance, and Kia Finance, we deliver innovative financing, leasing, and insurance solutions to more than 3 million customers and businesses nationwide.

We're a company driven by growth, innovation, and people. At HCA, you'll find opportunities to build new skills, expand your career, and make a real impact-while working in a diverse, inclusive, and valuesdriven environment. We're proud to support our communities through volunteerism, philanthropy, and engaged Employee Resource Groups.

If you're looking for a fastpaced, collaborative workplace where your ideas matter, join us as we lead the future of financing freedom of movement. Apply today.

WORK MODEL

#LI-OnSite (4 days a week)

WHAT YOU WILL DO

The Sr. AI Agent / Prompt Engineer designs, builds, and hardens production grade AI agents that use large language models to reason, invoke tools, retrieve enterprise knowledge, and recover from errors. This role goes beyond prompt writing and owns agent behavior end to end, including prompt systems, tool orchestration, guardrails, evaluation, and reliability in real business workflows. This role will operate independently, partner closely with architecture, product, governance, and UX, and actively drive AI initiatives from prototype through production.

HOW YOU WILL MAKE AN IMPACT

1. Agent and Prompt Engineering
Design, build and deploy multistep prompt chains for complex of reasoning, planning, tool integration, and error recovery ensuring accuracy, reliability and contextual awareness.
Author and maintain robust prompt libraries (system prompts, task prompts, tool prompts) with clear structure, constraints, and fallbacks.
Develop agent workflows using function calling, graphbased orchestration, or similar agent frameworks.
Continuously iterate prompts and agent logic to improve accuracy, consistency, and grounded response.

2. Tool Use and Integration
Integrate agents with enterprise tools, APIs, and data sources (e.g. retrieval systems, workflow engines, internal services).
Define safe tool use patterns, permissions, and auditing strategies in partnership with governance and security teams.
Partner with data and platform engineers to ensure reliable RAG and agent execution paths.

3. Evaluation, Quality, and Reliability
Define and run offline and online evaluations for agent behavior (task success, tool success, error recovery).
Diagnose failure modes such as hallucinations, prompt injection, and tool misuse.
Partner with QA and Governance to harden agents prior to production release.

4. Cross-Functional Collaboration
Partner with business teams and product managers to translate business use cases into agent behaviors and integrate AI agents into production systems.
Ensure optimized design for interaction flows, transparency, and user trust
Stay current of emerging AI research trends and recommend practical improvements to the enterprise AI stack.

WHAT YOU WILL BRING TO THE ROLE

        Minimum 8 years' progressive experience including 3 years in applied AI or backend engineering including strong proficiency with Python.

        Experience with agent frameworks (LangChain/LangGraph or similar patterns).

        Experience with AI content generation, chatbots, or automated workflows.

        Experience with multiagent coordination, RLHF/RLAIF, or feedback loops preferred.

        Knowledge of safety filters, jailbreak resistance, and redteam tactics preferred.

        Automotive or financial services industries preferred.

        Bachelor's degree in computer science, data science, engineering, or a related field.

        Proven expertise in building AI agents and orchestrating multi-model workflows.

        Deep understanding of prompt design patterns, context management and model behavior tuning.

        Track record of delivering production-grade AI solutions that balance innovation with reliability.

        Technical background, strong analytical skills and a creative mindset to shape AI interactions and improve automated systems.

        Exceptional attention to detail and quality.

        Ability to work autonomously and in a team environment.

        Excellent verbal and written communication, including presentation skills.

        Excellent interpersonal skills to successfully collaborate with cross functional departments.

        Strong orientation toward results coupled with reputation for integrity, creativity and good judgment

        Must have the ability to challenge, when appropriate, existing practices.

WE TAKE CARE OF OUR PEOPLE

At HCA, we know our success starts with our people. We offer a comprehensive rewards package designed to support your health, financial wellbeing, and life outside of work - so you can bring your best every day.

In addition to competitive pay, our benefits include:

        Hybrid work schedule offering 4 on-site days and 1 remote day per week

        Vehicle benefits designed around your role, including monthly allowances and purchase and lease discounts

        Flexible health coverage with medical, dental, and vision plans, including no cost and low-cost options

        Annual employer HSA contribution to help offset healthcare expenses

        401(k) with company match and immediate vesting, so you can start building your future from day one

        100% company paid life and disability insurance for added peace of mind

        Wellbeing programs at no cost to you, including gym benefits and health resources

        Generous parental leave to support growing families

        Paid Volunteer Time Off, plus a company donation to a charity of your choice

At HCA, our benefits are more than perks - they're part of our commitment to supporting you at work and in life. Learn more about benefits at HCA!

WHAT HAPPENS NEXT

Express your interest by submitting an application. Once your application is received, our recruiting team will review your application to see if you meet the basic and preferred qualifications listed on the job description. For more information on our culture, visit our careers page.

OTHER DETAILS

Our Company is an equal opportunity employer committed to fostering a diverse, inclusive, and respectful workplace-because we believe diversity builds stronger teams. We comply with all applicable federal, state, and local equal employment opportunity laws and do not discriminate on the basis of race, religion or creed, color, national origin, ancestry, caste, citizenship, sex or gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity or expression, age, disability, medical condition, genetic information, marital status, family care or medical leave status, military or veteran status, political affiliation, or any other characteristic protected by law. Information provided during the application process is requested in good faith and will be used solely in accordance with applicable employment laws.

California Privacy Notice

This notice only applies to our applicants who reside in the State of California.

The latest version of our Privacy Policy can be found here. This Privacy Policy provides you with notice, at or before the point of collection, about the categories of personal information to be collected from you, the purposes for which your personal information is collected or used, and whether that information is sold or shared, so that you can exercise meaningful control over our use of your personal information. We are providing this notice to comply with the California Consumer Privacy Act of 2018, as amended as amended by the California Privacy Rights Act of 2020 ("CCPA"). 

If you have any questions about CCPA regarding California residents or HCA team members, please contact the Privacy Team at Privacy2@hcs.com.