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Added 1 min ago
EH
Senior ML Engineer, Agentic AI
Ellipsis Health
San Francisco, CA
- $160,000 to $210,000 USD / year
Added 1 min ago
Senior Associate - AI Security Engineer
New York Life
Remote, United States
New York Life is seeking a hands-on AI Security Engineer to evaluate and secure emerging AI technologies through practical engineering, security testing, and proof-of-concept (PoC)…
Added 1 min ago
Lead Software Engineer (Full Stack)
U.S. Bank
Earth City, MO
Added 2 mins ago
CC
Senior Applications Security Engineer, AI & Automation Development
Centene Corporation
Jefferson City, MO
- $87,000 to $161,300 USD / year
…capabilities used across Security Defense Technologies (SDT). This engineer will join the Defense Automation & Transformation team to expand our development and automation capacity, help…
Added 7 mins ago
UG
Senior AI/ML Engineer - Remote - Central Time Zone Preferred
UnitedHealth Group
Eden Prairie, MN
- $120,100 to $214,500 USD / year
Added 8 mins ago
Enterprise Architecture Manager, Senior Vice President
Citibank, N.A.
United States
…structural impact assessments on core operating platforms to engineer proactive systemic…
Added 8 mins ago
AI/ML Engineering Director
LED FastStart
Home Office, LA
GDIT is seeking a Director-level AI/ML Engineer to support CCaaS & AI digital transformation initiatives across federal and public sector environments. This role combines hands-on…
Added 11 mins ago
Senior Associate - AI Security Engineer
New York Life Insurance Co
United States
New York Life is seeking a hands-on AI Security Engineer to evaluate and secure emerging AI technologies through practical engineering, security testing, and proof-of-concept (PoC)…
Added 13 mins ago
Sr. System/Test Validation Engineer
Advanced Micro Devices, Inc
Austin, TX
AMD’s Product Development Engineering team is seeking an experienced Test Engineer to support our Data Center Accelerated Computing products. In this role, you will develop and deploy…
Added 13 mins ago
Package Design Engineer
Google
Sunnyvale, CA
Added 13 mins ago
Sr. Silicon Design Engineer: Hardware-Software Co-Design
Advanced Micro Devices, Inc
Bellevue, WA
The AMD AI Group is looking for a Senior Silicon Design Engineer to co-design the hardware-software interface for AMD Instinct™ GPUs. You will work with hardware architects to model and…
Added 13 mins ago
AI Platform Security Engineer
Advanced Micro Devices, Inc
San Diego, CA
AMD is looking for an AI Platform Security Engineer to join the Product Security Office (PSO) in securing the platforms that run the world’s most demanding AI workloads. Working across…
Added 17 mins ago
IG
AI Engineer Architect / FDE (Prototype/POCs)
Insight Global
Chicago, IL
- From $94 USD / hour
Independent, hands-on AI engineer who can navigate ambiguity and deliver with minimal oversight.
Added 17 mins ago
IG
AI Engineer Architect / FDE (Prototype/POCs)
Insight Global
Chicago, IL
- From $94 USD / hour
Independent, hands-on AI engineer who can navigate ambiguity and deliver with minimal oversight.
Added 18 mins ago
Staff Forward Deployed Engineer
Databricks
Remote, United States
As a Staff Forward Deployed Engineer (FDE), you will work with federal, state, and local government customers to build and productionize solutions to their data & AI challenges using the…
Added 18 mins ago
Sr. Forward Deployed Engineer
Databricks
Remote, United States
As a Sr. Forward Deployed Engineer (FDE), you will work with federal, state, and local government customers to build and productionize solutions to their data & AI challenges using the…
Added 20 mins ago
Cloud Engineer (Cloud Engineer 3) 30895
Huntington Ingalls Industries
Fairfax, VA
HII Mission Technologies is seeking a Cloud Engineer to join our IT Engineering DevSecOps team! As a Cloud Engineer on our team, you’ll directly contribute to tool and capability…
Added 20 mins ago
Operations Analyst (Engineer Systems 2) - 31025
Huntington Ingalls Industries
Virginia Beach, VA
Added 21 mins ago
ENGINEER PLANNING ANALYST 3
HII
Newport News, VA
Added 21 mins ago
ENGINEER ENVIRONMENTAL 3
HII
Newport News, VA
Added 21 mins ago
EG
Senior Data Engineer
Eliassen Group
McLean, VA
- $65 to $75 USD / hour
Our client seeks a Senior Data Engineer to design, build, and optimize scalable data pipelines and platforms on AWS. The role will focus on batch and streaming data processing, integration…
Added 23 mins ago
RGM Product Manager
The Coca-Cola Company
Atlanta, GA
Added 28 mins ago
Sr. Production Engineer
Zscaler
San Jose, CA · Santa Clara, CA
We are looking for a Sr. Production Engineer to join our team. This is a hybrid (3 days a week in San Jose, CA) or Bellevue, WA role, reporting to the Senior Manager, Site Reliability…
Added 29 mins ago
O
Principal Software Engineer - Oracle Labs & Experiences (Oracle Labs)
Oracle
Jefferson City, MO
- $118,700 to $194,400 USD / year
+ Professional level certifications (OCI Architect, AWS Solutions Architect, Azure Administrator, GCP Professional Cloud Engineer, NVIDIA Certified) strongly preferred.
Added 39 mins ago
Sr Core Developer
STC
SILVER SPRING, MD
Integrate technical requirements and inputs from the Systems Architect, Systems Engineer, and Cloud-Infrastructure Engineer.

Closed listing

Mastercard

AI Engineer ||

O Fallon, MO, United States

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

This opening has closed.

The original listing is kept below for reference.

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About employer

Job details

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

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Original job description

Archived listing. The details below describe a past opening.

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

About employer

More about this job

Skills

ML
Workflow
Normalise data
Documentation
Unstructured data
Cybersecurity
Confidentiality

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