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Added 1 min ago
AT
Infrastructure Server Engineer (Top Secret)
Apex Technology, Inc.
Los Angeles, CA
- $150,000 to $250,000 USD / year
The IT Engineer (Infrastructure Server Engineer) is responsible for the design, implementation, administration, and optimization of Apex’s technology infrastructure. This role encompasses…
Added 1 min ago
AT
IT Engineer (Active Top Secret)
Apex Technology, Inc.
Los Angeles, CA
- $150,000 to $250,000 USD / year
The IT Engineer is responsible for the design, implementation, administration, and optimization of Apex’s technology infrastructure. This role encompasses systems engineering, network…
Added 32 mins ago
TF
Principal Engineer
Thrivent Financial for Lutherans
Minneapolis, MN
- $161,436 to $218,415 USD / year
As a Principal Engineer, you will help establish the engineering vision and act as the bridge between strategic intent and scalable execution in our Customized Experience Platform (CEP).…
Added 35 mins ago
Senior Electrical Engineer
Beacon EmbeddedWorks
Eden Prairie, MN
The Senior Electrical Engineer defines product requirements, translate requirements to implementable architectures, perform detailed design work and ensure the end product is optimized for…
Added 35 mins ago
Senior Sales Engineer
Beacon EmbeddedWorks
Eden Prairie, MN
The Senior Sales Engineer is the technical lead in Beacon's presales process. Working alongside Business Development Directors and distribution partners, this role turns a customer's…
Added 54 mins ago
Engineer IV - Svcs RF
Ericsson
WA
Ericsson is looking for an experienced RF Engineer to join the MACS team in the USA. In this role, you will serve as a subject matter expert in RF optimization, lead engineering teams…
Added 1 hour ago
Staff Systems Engineer (Redondo Beach CA)
Northrop Grumman
El Segundo
Seeking a EMI/EMC Systems Engineer to serve as the subject matter expert (SME) and technical lead for Electromagnetic Interference (EMI), Electromagnetic Compatibility (EMC), and E3…
Added 1 hour ago
Senior Electrical Engineer
CP Engineers
Remote, United States
The Senior Electrical Engineer will review, sign, and seal electrical drawings and will also contribute hands on design support as required. Project work may include electrical and control…
Added 1 hour ago
Water Resources Project Manager
CP Engineers
Remote, United States
…treatment facilities, pump stations, and collection/conveyance…
Added 1 hour ago
Water Resources Project Manager
CP Engineers
Remote, United States
…treatment facilities, pump stations, and collection/conveyance…
Added 1 hour ago
Group Manager, Water Resources Engineering
CP Engineers
Remote, United States
We are seeking a Group Manager for our Water and Wastewater team with 15+ years of experience to lead the planning, design, and construction of water and wastewater infrastructure projects.…
Added 1 hour ago
Senior Electrical Engineer
CP Engineers
Remote, United States
The Senior Electrical Engineer will review, sign, and seal electrical drawings and will also contribute hands on design support as required. Project work may include electrical and control…
Added 1 hour ago
Senior Electrical Engineer
CP Engineers
Remote, United States
The Senior Electrical Engineer will review, sign, and seal electrical drawings and will also contribute hands on design support as required. Project work may include electrical and control…
Added 1 hour ago
Group Manager, Water Resources Engineering
CP Engineers
Remote, United States
We are seeking a Group Manager for our Water and Wastewater team with 15+ years of experience to lead the planning, design, and construction of water and wastewater infrastructure projects.…
Added 1 hour ago
Water Resources Senior Project Engineer (Water or Wastewater)
CP Engineers
Remote, United States
CP is experiencing exciting, sustained growth and is looking for a talented Senior Project Engineer to join our dynamic Water Resources practice. This role offers the opportunity to work on…
Added 1 hour ago
Water Resources Senior Project Engineer (Water or Wastewater)
CP Engineers
Remote, United States
CP is experiencing exciting, sustained growth and is looking for a talented Senior Project Engineer to join our dynamic Water Resources practice. This role offers the opportunity to work on…
Added 1 hour ago
Principal Software Engineer (Prisma Access)
Palo Alto Networks, Inc.
CA
As a Principal Software Engineer for Prisma Access, you will lead the architecture, systems design, and performance optimization of cloud infrastructure underpinning Palo Alto Networks'…
Added 1 hour ago
Lead Software Engineer
Mojo AI
Sandy, UT
We are seeking an experienced and highly skilled Lead Software Engineer to join our team. As the team’s technical lead, you will guide general team processes and ensure quality across both…
Added 1 hour ago
Supplier Quality Engineer
Honda Dev. and Mfg. of Am.,LLC
Greensburg, IN
Production Support Department: Engineer Person In Charge supports problem investigation/analysis/ report for Quality issues through blueprint reading, part measurement, Catia/3D. Support…
Added 1 hour ago
C
Sales Solutions Engineer - Ed Tech
Coursedog
Remote, United States
- $120,000 to $140,000 USD / year
As a Solutions Engineer at Coursedog, you’ll lead the demos, scoping, and CX calls that align customers, Sales, and Customer Success before a deal is booked. You’ll work closely with…
Added 1 hour ago
Senior Data Center Network/ Mellanox Engineer
Simple Solutions
Jacksonville, FL
3+ years of Linux systems administration experience.
Added 1 hour ago
SSD Mfg NPI Product Engineer, Nitro SSD
Amazon Data Services, Inc.
Seattle, WA · Cupertino, CA
…investigating any early-life product failures. This role requires the engineer to be a technical contact and take on full ownership of the manufacturing launch and resolution of process…
Added 1 hour ago
TT
Founding Forward Deployed Engineer
True Talent Solutions Partners
New York, NY
- $180,000 to $250,000 USD / year
Join an early-stage B2B SaaS team building AI-powered tools for revenue operations. As a founding deployment engineer, you will turn complex customer data into reliable models and…
Added 1 hour ago
Principal Quality Engineer
Twenty-Six Defense
Fort Worth, TX
…United States. Twenty-Six Defense is wholly owned by Elbit Systems Ltd. (NASDAQ: ESLT and TASE: ESLT), a global high-technology company engaged in a wide range of programs for innovative…
Added 1 hour ago
Quality Engineer II
Twenty-Six Defense
Fort Worth, TX
…United States. Twenty-Six Defense is wholly owned by Elbit Systems Ltd. (NASDAQ: ESLT and TASE: ESLT), a global high-technology company engaged in a wide range of programs for innovative…

Closed listing

US: Mastercard Technologies, LLC

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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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

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