Temporary Ai Prompt Engineer Jobs in California (NOW HIRING)

MCI is one of the fastest-growing tech-enabled business services companies in the USA, with a strong call center footprint and operations that extend across multiple countries. We deliver Customer Experience (CX), Business Process Outsourcing (BPO), and Anything-as-a-Service (XaaS) cloud technology solutions across a wide range of industries, including healthcare, retail, government, education, telecom, technology e-commerce, and financial services. Our contact centers are powered by both on-site and remote agents, leveraging advanced technologies to enhance customer journeys, drive scalability and reduce costs.

At MCI we are committed to fostering an environment where professionals can build meaningful careers, access continuous learning and development opportunities and contribute to the success of a globally expanding, industry-leading organization.

We are seeking a Senior AI Prompt Engineer to design, optimize, and manage prompts that maximize the effectiveness of Large Language Models and AI-powered applications. This role is responsible for improving AI response quality, consistency, accuracy, and business relevance across a wide range of use cases.

The successful candidate will work closely with AI engineers, product managers, trainers, and business stakeholders to develop scalable prompting solutions that drive measurable business outcomes.

Key Responsibilities:

Prompt Design & Development

• Create and maintain prompts that enhance AI system performance.
• Design prompts for conversational AI, automation, and business applications.
• Develop reusable prompt templates and libraries.
• Optimize prompt structures for different use cases and models.
• Support enterprise AI product development initiatives.

Prompt Testing & Optimization

• Improve response quality through experimentation and analysis.
• Conduct prompt testing and A/B evaluations.
• Analyze AI outputs and identify optimization opportunities.
• Improve accuracy, consistency, and user experience.
• Support model tuning and evaluation activities.

AI Performance Evaluation

• Measure and monitor AI effectiveness across multiple applications.
• Develop evaluation criteria and quality standards.
• Review AI responses against business requirements.
• Track prompt performance and improvement metrics.
• Provide recommendations for ongoing enhancements.

Collaboration & Stakeholder Support

• Work closely with technical and business teams.
• Collaborate with AI engineers, trainers, and product managers.
• Translate business requirements into prompting strategies.
• Support AI solution design and implementation efforts.
• Communicate findings and recommendations to stakeholders.

Research & Continuous Improvement

• Drive innovation within prompt engineering practices.
• Stay current with developments in Generative AI and LLMs.
• Evaluate new prompting techniques and methodologies.
• Contribute to prompt engineering best practices.
• Support AI innovation and experimentation initiatives.

WONDER IF YOU ARE A GOOD FIT FOR THIS POSITION?

All positive, and driven applicants are encouraged to apply. The Ideal candidates for this position are highly motivated and dedicated and should possess the below qualities:

• Bachelor's Degree in Computer Science, Artificial Intelligence, Linguistics, Communications, Information Systems, Business, or a related field.
• Minimum 5 years of experience in AI, software development, content strategy, research, analytics, or a related discipline.
• Minimum 2 years of hands‑on experience working with Generative AI technologies.
• Experience designing, testing, and optimizing prompts for Large Language Models.
• Strong understanding of AI model behavior and prompt engineering principles.
• Excellent written communication and language analysis skills.
• Strong analytical and problem‑solving abilities.
• Experience evaluating AI outputs and identifying improvement opportunities.
• Ability to manage multiple projects and priorities effectively.
• Strong stakeholder engagement and collaboration skills.
• Experience documenting standards, methodologies, and best practices.
• Ability to work effectively in fast‑paced and evolving environments.

Nice to Have

• Experience with OpenAI, Anthropic, Gemini, Claude, or similar AI platforms.
• Experience with Retrieval‑Augmented Generation (RAG) solutions.
• Knowledge of AI agents and workflow automation technologies.
• Familiarity with AI evaluation frameworks and testing methodologies.
• Experience with conversational AI and chatbot development.
• Understanding of AI governance and responsible AI principles.
• Experience working within SaaS, technology, or BPO environments.
• Advanced certifications or training related to AI and Generative AI.

This job operates in a professional office environment. While performing the duties of this job, the employee will be largely sedentary and will be required to sit/stand for long periods while using a computer and telephone headset. The employee will be regularly required to operate a computer and other office equipment, including a phone, copier, and printer. The employee may occasionally be required to move about the office to accomplish tasks; reach in any direction; raise or lower objects, move objects from place to place, hold onto objects, and move or exert force up to forty (40) pounds.

All MCI Locations

• Must be authorized to work in the country where the job is based.

Subject to the program and location of the position

• Must be willing to submit up to a LEVEL II background and/or security investigation with a fingerprint. Job offers are contingent on background/security investigation results.
• Must be willing to submit to drug screening. Job offers are contingent on drug screening results. (Does not apply in Canada)

Consistent with the Americans with Disabilities Act (ADA), it is the policy of MCI and its affiliates to provide reasonable accommodations when requested by a qualified applicant or employee with a disability unless such accommodations would cause undue hardship. The policy regarding requests for reasonable accommodation applies to all aspects of employment. If reasonable accommodations are needed, please contact Human Resources.

At MCI and its subsidiaries, we embrace differences and believe diversity is a benefit to our employees, our company, our customers, and our community. All aspects of employment at MCI are based solely on a person's merit and qualifications. MCI maintains a work environment free from discrimination, one where employees are treated with dignity and respect. All employees share in the responsibility for fulfilling MCI’s commitment to a diverse and equal opportunity work environment.

MCI does not discriminate against any employee or applicant on the basis of age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations, and ordinances.MCI will consider for employment qualified applicants with criminal histories in a manner consistent with local and federal requirements.

MCI will not tolerate discrimination or harassment based on any of these characteristics.We adhere to these principles in all aspects of employment, including recruitment, hiring, training, compensation, promotion,benefits, social and recreational programs, anddiscipline. In addition, it is the policy of MCI to provide reasonable accommodation to qualified employees who have protected disabilities to the extent required by applicable laws, regulations, and ordinances where an employee works.

MCI helps customers take on their CX and DX challenges differently, creating industry‑leading solutions that deliver exceptional experiences and drive optimal performance. MCI assists companies with business process outsourcing, staff augmentation, contact center customer services, and IT Services needs by providing general and specialized hosting, software, staff, and services.

In 2019, Marlowe Companies Inc. (MCI) was named by Inc. Magazine as Iowa’s Fastest Growing Company in the State of Iowa and was named the 452nd Fastest Growing Privately Company in the USA, making the coveted top 500 for the first time. MCI’s subsidiaries had previously made Inc. Magazine's List of Fastest‑Growing Companies 15 times, respectively. MCI has ten business process outsourcing service delivery facilities in Georgia, Florida, Texas, New Mexico, California, Kansas, Nova Scotia, South Africa, and the Philippines.

Driving modernization through digitalization, MCI ensures clients do more for less. MCI is the holding company for a diverse lineup of tech‑enabled business services operating companies. MCI organically grows, acquires, and operates companies that have synergistic products and services portfolios, including but not limited to Automated Contact Center Solutions (ACCS), customer contact management, IT Services (IT Schedule 70), and Temporary and Administrative Professional Staffing (TAPS Schedule 736), Business Process Management (BPM), Business Process Outsourcing (BPO), Claims Processing, Collections, Customer Experience Provider (CXP), Customer Service, Digital Experience Provider (DXP), Account Receivables Management (ARM), Application Software Development, Managed Services, and Technology Services, to mid‑market, Federal & enterprise partners.

The purpose of the above job description is to provide potential candidates with a general overview of the role. It's not an all‑inclusive list of the duties, responsibilities, skills, and qualifications required for the job. You may be asked by your supervisors or managers to perform other duties. You will be evaluated in part based upon your performance of the tasks listed in this job description.

The employer has the right to revise this job description at any time. This job description is not a contract for employment, and either you or the employer may terminate employment at any time, for any reason.