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Python Full Stack Engineer - Professional
HEXAWARE
United States
Hexaware is a dynamic and innovative IT organization committed to delivering cutting-edge solutions to our clients worldwide. We pride ourselves on fostering a collaborative and inclusive…
Added 1 min ago
Firmware Engineer
Samsara
Remote, United States
…are the building blocks Samsara uses to construct enterprise solutions for a wide range of verticals, including commercial fleet management and industrial monitoring. Through a unique…
Added 3 mins ago
MP
Director of Health, Safety & Environmental (HSE)
MESA POWER SOLUTIONS LLC
Evansville, WY
- $159,000 to $184,000 USD / year
Mesa Power Solutions is a fast-growing U.S. manufacturer delivering reliable, responsible power systems to industrial markets nationwide. We engineer and build advanced, sound-attenuated,…
Added 3 mins ago
MP
Director of Health, Safety & Environmental (HSE)
MESA POWER SOLUTIONS LLC
San Antonio, TX
- $183,000 to $211,000 USD / year
Mesa Power Solutions is a fast-growing U.S. manufacturer delivering reliable, responsible power systems to industrial markets nationwide. We engineer and build advanced, sound-attenuated,…
Added 3 mins ago
MP
Buyer II
MESA POWER SOLUTIONS LLC
Evansville, WY
- $59,700 to $66,200 USD / year
Mesa Power Solutions is a fast-growing U.S. manufacturer delivering reliable, responsible power systems to industrial markets nationwide. We engineer and build advanced, sound-attenuated,…
Added 4 mins ago
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Electrical Engineer
Actalent
Pocasset, MA
- $45 to $65 USD / hour
This Electrical Engineer role focuses on designing, integrating, and validating electrical and electromechanical systems that support advanced technologies such as autonomous underwater…
Added 4 mins ago
Mechanical Engineer
Actalent
Pocasset, MA
Apply principles and techniques of mechanical engineering to research, develop, design, and test verified design solutions for unmanned maritime and oceanographic systems.
Added 4 mins ago
Cad Design Engineer
Actalent
Torrance, CA
Job Title: CAD Design EngineerJob DescriptionThe CAD Design Engineer creates manufacturing-ready 3D models from legacy 2D technical data for government and commercial parts that currently…
Added 4 mins ago
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Manufacturing Engineer
Actalent
Charlotte, NC
- $45 to $48 USD / hour
Job Title: Manufacturing Engineer Job DescriptionThe Manufacturing Engineer serves as the primary technical resource supporting air-cooled chiller manufacturing operations on 2nd shift.…
Added 4 mins ago
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Functional Test Engineer
Actalent
Detroit, MI
- $36 to $42 USD / hour
We're seeking a Vehicle Test Engineer to support the development and validation of advanced powertrain systems for on-highway trucks. This hands-on role combines vehicle testing, data…
Added 4 mins ago
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Supplier Quality Engineer
Actalent
Englewood, CO
- $50 to $60 USD / hour
…System Analysis (MSA). Evaluate manufacturing and inspection data using SPC and statistical methods. Identify sources of repeatability and reproducibility variation and recommend corrective…
Added 4 mins ago
Lead Robotics & Automation Engineer
GE Vernova
Charleroi, PA
The Automation Robotics Engineer is responsible for designing, developing, implementing, and supporting robotics automation, AGV/AMRs and control systems that improve operational…
Added 4 mins ago
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Engineer I - Forward Deployed Engineer
GSK
Cambridge, MA
- $95,700 to $159,500 USD / year
Contribute to clean handoff packages for the Solutions Engineer - documentation, runbooks, and working software.
Added 4 mins ago
AI Solutions Architect / Forward-Deployed Engineer
Watsco Inc.
Orlando, FL
AI Solutions Architect / Forward-Deployed Engineer| HVAC Products| Carrier Enterprise| Orlando Remote
Added 4 mins ago
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Associate Manufacturing Engineer
Ascential Technologies
Ham Lake, MN
- $75,000 to $90,000 USD / year
Apply FMEA process to evaluate failure data, if necessary, from field data to find root cause and implement sound engineering solutions.
Added 5 mins ago
GL
Data Center Logistics Associate - 1st Shift
GXO Logistics
Bristow, VA
- $21 USD / hour
We believe providing superior support and solutions for our customers drives our success, and we want to put you behind the wheel. As the Data Center Logistics Associate position offers an…
Added 5 mins ago
GL
Data Center Logistics Associate - 1st Shift
GXO Logistics
Bristow, VA
- $21 USD / hour
We believe providing superior support and solutions for our customers drives our success, and we want to put you behind the wheel. As the Data Center Logistics Associate position offers an…
Added 5 mins ago
GL
Data Center Logistics Associate - 1st Shift
GXO Logistics
Bristow, VA
- $21 USD / hour
We believe providing superior support and solutions for our customers drives our success, and we want to put you behind the wheel. As the Data Center Logistics Associate position offers an…
Added 5 mins ago
Data Center Logistics Associate - 2nd Shift
GXO Logistics
Midlothian, TX
We believe providing superior support and solutions for our customers drives our success, and we want to put you behind the wheel. As the Data Center Logistics Associate position offers an…
Added 5 mins ago
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Data Center Logistics Associate - Weekend 3rd Shift
GXO Logistics
Bristow, VA
- $21 USD / hour
We believe providing superior support and solutions for our customers drives our success, and we want to put you behind the wheel. As the Data Center Logistics Associate position offers an…
Added 6 mins ago
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Software Engineer - Trading Operations
DRW
NY
- $120,000 to $175,000 USD / year
Build, maintain and extend trading related applications, data pipelines, and solutions.
Added 6 mins ago
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Principal AI Security Engineer
Zip Co Limited
United States
- $203,000 to $254,000 USD / year
Engineer protections against prompt injection, data exfiltration, insecure tool execution, excessive agency, and other AI-specific threats.
Added 6 mins ago
Manufacturing Engineer III
Applied Materials
Gloucester, MA · Gloucester
As a Manufacturing Engineer, you are responsible for developing and maintaining methods, operating sequences, and processes in the fabrication of parts, components, subassemblies, and final…
Added 6 mins ago
Manufacturing Engineer III
Applied Materials
Gloucester, MA · Gloucester
As a Manufacturing Engineer, you are responsible for developing and maintaining methods, operating sequences, and processes in the fabrication of parts, components, subassemblies, and final…
Added 6 mins ago
Data Engineer II
Numerator
Chicago, IL
As a Data Engineer II at Numerator, you will help our team deliver data products, analytics, and models quickly and independently. The role is cross-functional and responsible for…

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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