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Engineering Intern
NFI Industries
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Ability to integrate generative AI tools, specifically Gemini, to drive creative solutions and automate routine tasks
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TOBYHANNA, PA
Exhibits a commitment to self-development by staying current on information, tools, and systems
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Senior Associate, Compensation Design, M&A Strategy
KPMG LLP
Atlanta, GA · Boston, MA · Chicago, IL · Dallas, TX · Denver, CO · Houston, TX · Los Angeles, CA · New York, NY · San Francisco, CA
…opportunities, a world-class training facility, and leading market tools, we help our people continue to grow both professionally and personally. If you're looking for a firm with a strong…
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4th Grade Teacher - Handley Elementary
La Porte Community School Corporation
LaPorte, IN
- $47,500 USD / year
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Regulatory Compliance Administrator
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Familiarity with regulatory filing systems, CRM/grant tracking tools, and permitting databases.
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Tooling Maintenance Technician
Airbus Aerosystems Kinston, Inc
Kinston, NC
Dismantles equipment and machines using hammers, wrenches, crowbars, and other hand tools.
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Aircraft Systems Installer
Airbus Americas, Inc.
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Training from a vocational school or previous employer in the use of application tools and in application techniques
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Diesel Mechanic
Ryder
BENICIA, CA
- $38.73 USD / hour
We provide the best State-of-the-Art Diagnostics and Tools to all Ryder Maintenance Repair Mechanics who work on Heavy Duty Vehicles
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Software Developer
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Added 1 min ago
Senior Principal Software Engineer
BAE Systems
Hudson, NH · Austin, TX · San Diego, CA
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Software Engineer (Expert)
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Herndon, VA
At BAE Systems, we promote a strong, collaborative culture and provide our employees with the tools, skills and training they need to succeed. We are all about trust, camaraderie and a…
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Senior Systems Engineer - EOIR Algorithms Development
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Skilled in developing and using tools such as MATLAB, Simulink, Python, VBA, C/C++ on Windows and/or Linux
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Used Car Technician
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Modern tools, equipment, and support from an experienced leadership team.
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Modern shop equipped with the latest tools, equipment, and diagnostic resources
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Level 3 Chrysler Technician
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Modern facility equipped with OEM diagnostic tools and equipment
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Temporary Housekeeping Manager
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Director of Project Management
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3+ years of hands-on experience with Jira or comparable delivery tools
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Project Manager - Agency (Web & Digital Marketing)
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Experience with e-commerce solutions and platform integrations connecting CMS, CRM, marketing automation, and analytics tools
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Principal Software Engineering
AT&T Services, Inc.
Remote, United States
- $174,100 to $261,100 USD / year
As a Principal Software Engineering, you will be a lead architect for AT&T's AI-powered tools, automation platforms, and Agentic AI ecosystem, responsible for building and scaling the…
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Retail Sales and Store Support
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EUGENE, OR · Eugene, OR
Equipment Use: Handling tools such as pallet jacks, box cutters, or handheld devices following safety guidelines
Added 1 min ago
Retail Sales and Store Support
Albertsons Companies
ALGONQUIN, IL · Algonquin, IL
Equipment Use: Handling tools such as pallet jacks, box cutters, or handheld devices following safety guidelines
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Retail Sales and Store Support
Albertsons Companies
SAN CLEMENTE, CA · San Clemente, CA
Equipment Use: Handling tools such as pallet jacks, box cutters, or handheld devices following safety guidelines
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Retail Sales and Store Support
Albertsons Companies
ORO VALLEY, AZ · Oro Valley, AZ
Equipment Use: Handling tools such as pallet jacks, box cutters, or handheld devices following safety guidelines

US: Mastercard Technologies, LLC

AI Engineer ||

O'Fallon, MO, United States

Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD

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Job details

Pay: Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD
Posting language: English
Posted: Nov 4, 2026

Original job description

Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

Title and Summary

AI Engineer ||

Role Summary The AI Engineer is responsible for designing and delivering AI-powered solutions that improve engineering productivity and business workflows. This role requires a strong foundation in AI/ML concepts, with hands-on expertise in LLM systems, data preparation, and context design (including chunking) to build scalable, high-quality AI solutions.

What You Will Do Lead AI-Driven Solution Development

Identify and drive high-impact AI use cases across engineering and business workflows Design end-to-end AI solutions leveraging LLMs, orchestration, and automation Move rapidly from exploration to production-grade implementations

Build LLM Solutions & Intelligent Agents

Develop LLM-based applications including prompt frameworks, orchestration layers, and integrations Create and evolve AI-powered agents (e.g., Copilot-based or similar) for workflow automation and decision support Apply techniques such as retrieval-augmented approaches, context management, and prompt optimization

Design Data, Context & Chunking Strategies (Critical)

Structure and prepare data for LLM consumption, including effective chunking and context window optimization Design retrieval strategies that improve relevance, accuracy, and response quality Balance context size, latency, and cost while maintaining solution effectiveness

Apply Strong AI/ML Foundations

Understand and reason about model behavior, evaluation, bias, and limitations Tune and adapt prompts, context, and workflows instead of relying on model retraining Ensure responsible and effective use of AI through sound engineering practices

Drive Engineering Productivity with AI

Apply AI tools (e.g., Copilot and similar) to improve developer velocity and quality Build reusable patterns for AI-assisted coding, testing, and documentation Measure and scale productivity impact across teams

Data & Application Engineering

Build data pipelines and integrations to support AI workflows Develop APIs, services, and applications embedding AI capabilities Ensure solutions are scalable, maintainable, and integrated into real workflows

What You Bring

Strong foundation in AI/ML concepts, especially LLMs and modern AI systems

Hands-on experience with:

Prompt engineering and LLM orchestration frameworks Context design, chunking strategies, and retrieval techniques Working with structured and unstructured data for AI use cases

Solid software engineering and system design experience Ability to build end-to-end AI solutions (data → context → LLM → application) Pragmatic mindset focused on quality, usability, and business impact

Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

Corporate Security Responsibility

All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

Abide by Mastercard’s security policies and practices;
Ensure the confidentiality and integrity of the information being accessed;
Report any suspected information security violation or breach, and
Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.

In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.

THIS POSTING RELECTS ONE OR MORE CURRENT VACANCIES ON OUR TEAM, AND MASTERCARD INTENDS TO FILL THIS POSITION BY 02/02/2027. If the fill date has passed, Mastercard intends to fill this position as soon as possible.

Pay Ranges O'Fallon, Missouri: $92,000 - $147,000 USD

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