Jobs in the United States

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Senior Research Prototyping Engineer
Bose Corporation
Framingham, MA
Bose is seeking a hands-on engineer to build and evaluate experimental systems combining devices, software and research-developed algorithms. Working in a multidisciplinary research team,…
Added just now
Staff, Mapping Software Engineer
Lucid Motors
Newark, CA
We are seeking a Staff Mapping Engineer to lead the development of large-scale mapping systems
Added 4 mins ago
Sr Lead Software Engineer
JPMC page
Jersey City, NJ · NY
Hands-on practical experience delivering system design, application development, testing, and operational stability
Added 5 mins ago
Strategic Account Executive
Quid
Remote, United States
…worked as or in a Solutions role (consultant, architect, or engineer), Technical Account Manager, Business Transformation, or Management…
Added 5 mins ago
Software Engineer & Image Analyst
Amentum
Huntsville, AL
Software Engineering and Application Development
Added 5 mins ago
Sr. Systems Integration Engineer, Automated Drive
Rivian
Palo Alto, CA
Added 5 mins ago
Sr. Systems Integration Engineer, Automated Drive
Rivian
Palo Alto, CA
Added 6 mins ago
Principal Systems Engineer
Sierra Nevada Corporation
Lone Tree, CO
…sustain our way of living. Join our team! As a Principal Systems Engineer, you will demonstrate mastery in requirements engineering, systems integration, Verification & Validation (V&V),…
Added 6 mins ago
Business Intelligence Analyst
JDI
Macon, GA
Opportunities to take part in job related training and development
Added 7 mins ago
Senior Technical Product Marketing Manager, Performance
Fastly
Denver, CO · New York City, NY · San Francisco, CA · NY
…internet, to be programmable, and to support agile software development. Fastly’s customers include many of the world’s most prominent companies, including GitHub, Yelp, Paramount, and…
Added 8 mins ago
Lead Software Development Engineer in Test (SDET)
TCC Toyota Motor Credit Corporation Company
Plano, TX
We are seeking a Lead Software Development Engineer in Test (SDET) to join our team as an individual contributor. In this role, you will design, build, and maintain scalable test automation…
Added 9 mins ago
Associate Software Engineer (Hybrid)
Vizient, Inc.
Irving, TX
Vizient is seeking an Associate Software Engineer to contribute to the design, development, testing, and delivery of scalable, secure, and user-centered software solutions.
Added 9 mins ago
SI
Senior Software Engineer (LMTS), Backend – Enterprise Productivity
Salesforce, Inc.
CA · WA · NY
- $172,500 to $285,800 USD / year
Experience with feature flags, experimentation, and data-driven product development.
Added 15 mins ago
CO
Program Manager (Capital Improvement Program) - Environmental Services Department
City of San Jose
San Jose, CA
- $134,490.72 to $174,851.04 USD / year
…consultants, and San José Public Works staff. You will enjoy career development, new skills, mentoring, and the benefits of contributing to your community.Position…
Added 16 mins ago
Structural Engineer
Actalent
El Segundo, CA
Support the design, development, and production of advanced spaceborne electro-optical sensor payloads.
Added 16 mins ago
A
Systems Engineer
Actalent
Acton, MA
- $150,000 to $200,000 USD / year
Job title: Systems Engineer DescriptionSystems Engineer Space & Optical Sensor SystemsWe are seeking a Systems Engineer to support the development, integration, and testing of advanced…
Added 16 mins ago
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Software Test Engineer
Actalent
Melbourne, FL
- $50 to $70 USD / hour
Contribute to the design and maintenance of automated test environments that support product development from design through manufacturing.
Added 16 mins ago
A
Mechanical Engineer
Actalent
Syracuse, NY
- $40.86 to $57.69 USD / hour
Job Title: Mechanical EngineerJob DescriptionThis Mechanical Engineer role focuses on designing and engineering HVAC and related mechanical systems for a variety of building and industrial…
Added 16 mins ago
A
Manufacturing Engineer
Actalent
Edgewater, FL
- $35 to $45 USD / hour
…productivity and reduce operational costs. The Manufacturing Engineer applies industrial engineering principles, Lean methodologies, and continuous improvement techniques to reengineer…
Added 16 mins ago
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Product Engineer
Actalent
Lockport, NY
- $90,000 to $115,000 USD / year
Job Title: Product EngineerJob DescriptionThe Product Engineer supports testing and validation of HVAC and heat exchanger products, ensuring performance meets engineering and customer…
Added 16 mins ago
Equipment Design Engineer
Actalent
Savannah, GA
Job Title: Mechanical Design Engineer Automated MachineryJob DescriptionThis role focuses on the end-to-end mechanical design and development of custom automated equipment and machinery.…
Added 16 mins ago
Pipeline Engineer
Actalent
Versailles, KY
We are seeking an experienced Pipeline Project Engineer to support the design and execution of natural gas, liquids, CO, hydrogen, and other midstream infrastructure projects. This position…
Added 16 mins ago
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Piping Engineer
Actalent
Downers Grove, IL
- $35 to $48 USD / hour
Job Title: Piping Engineer (Stress Engineer I)Job DescriptionThis early-career Piping Engineer role focuses on piping stress analysis, system flexibility, piping supports, and mechanical…
Added 16 mins ago
A
Senior Electrical Engineer
Actalent
Naperville, IL
- $60 to $86 USD / hour
Electrical EngineerJob DescriptionWe are seeking an experienced Electrical Engineer to join our dynamic team. The successful candidate will play a critical role in designing and developing…
Added 16 mins ago
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Mechanical Engineer
Actalent
Broomfield, CO
- $50 to $70 USD / hour
Job Title: Mechanical EngineerJob DescriptionWe are seeking a Mechanical Engineer to support the development of automation and additive manufacturing systems. This role involves creating…

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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