Top 2636 Computer systems Jobs in O'fallon, Mo

Software Engineer II
Mastercard —O'Fallon, MO
- $92,000 - $147,000 a year
- Online Application
- Computer science
- Computer Science
- Mid-level
- Paid jury duty
- Health savings account
Computer Technician Apprentice
Fort Zumwalt School District —O'Fallon, MO
- Part-time
- Classroom
- Ability to lift 50 pounds
- Entry level
Mid-Level Systems Administrator
Boeing —Berkeley, MO
- $96,050 - $129,950 a year
- Azure
- System design
- Mid-level
- Health savings account
- Disability insurance
3d
Technical Support - Entry Level
USA Cyber —St. Louis, MO
- $18 - $24 an hour
- Full-time
- Hybrid work
- Driver's License
- Bachelor's degree
- Reliable transportation
- Paid training
- Disability insurance
Quick Apply
Elementary Computer Teacher
Wentzville School District —Wentzville, MO
- Public school
- Elementary school
- Entry level
- Health insurance
- Dental insurance
4d
Entry-Level Software Developer
Leidos —St. Louis, MO
- $57,850 - $104,575 a year
- Full-time
- Writing skills
- Databases
- Bachelor's degree
1d
Urology Clinical Pathway Manager
Urology of St. Louis —St. Louis, MO
- Full-time
- Background check
- Nursing
- RN License
- Disability insurance
- Health insurance
Quick Apply
8d
Bilingual Collection Representative
US Automotive Protection Services —Wentzville, MO
- $50,000 - $80,000 a year
- Full-time
- Bilingual
- Spanish
- Customer service
- Health insurance
- Dental insurance
Quick Apply
Field Service Technician
Linde —St. Louis, MO
- Extended hours
- Background check
- Customer service
- Military
- Health savings account
- Paid holidays
Quick Apply
Quality Control (QC) Supervisor
Allied Medical, LLC —Earth City, MO
- $57,000 - $67,000 a year
- Full-time
- Computer literacy
- 3 years
- Bachelor's degree
- Health savings account
- Health insurance
Quick Apply
MAINTENANCE TECHNICIAN
Banner Property —Saint Peters, MO
- $26 - $27 an hour
- Weekends as needed
- Background check
- Mid-level
- Residential
- Paid parental leave
- Disability insurance
Quick Apply
Construction Manager - Architect Engineer
GCC & Associates LLC —St. Louis, MO
- $125,000 a year
- Full-time
- 6 years
- Microsoft Outlook
- Construction site
- Health insurance
- Dental insurance
Quick Apply
Salesforce Administrator
Foster & Adoptive Care Coalition —St. Louis, MO
- Weekends as needed
- Computer Science
- Mid-level
- Office
- Health insurance
- Dental insurance
Quick Apply
Senior CAD Technician
Millstone Weber —Saint Charles, MO
- Civil engineering
- Construction site
- Writing skills
Quick Apply
Electrical Engineer
Diode Dynamics Llc —Saint Charles, MO
- $60,000 - $90,000 a year
- Full-time
- Bachelor of Science
- Mid-level
- Office
- Profit sharing
- Health savings account
Foster Care Case Manager
Presbyterian Childrens Homes and Services —St. Louis, MO
- $22.15 - $25.50 an hour
- On call
- CPR Certification
- Hospital
- Pass drug screening
- Paid holidays
- Health insurance
Director of Inventory Planning
Carboline Global Inc. —St. Louis, MO
- Full-time
- Up to 50% travel
- Office
- Ability to lift 50 pounds
- Health savings account
- Health insurance
Quick Apply
Orientation Coordinator
Wallis Companies —Pacific, MO
- Classroom
- English
- Mid-level
3d
Assistant Store Manager
Community Choice Financial Family of Brands —Lake Saint Louis, MO
- Weekends as needed
- Background check
- 18 years or older
- Spanish
- Paid training
- Health savings account
Home Modification Carpenter
Emmaus —Saint Charles, MO
- $30.00 - $33.65 an hour
- Full-time
- 18 years or older
- Clean driving record
- Construction site

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Software Engineer II

Mastercard -
O'Fallon, MO

Apply Now

Job Details

Full-time
$92,000 - $147,000 a year

Benefits

Paid jury duty
Health savings account
Paid holidays
Disability insurance
Health insurance
Dental insurance
Flexible spending account
Tuition reimbursement
Vision insurance
401(k) matching
Gym membership
Bereavement leave
Life insurance

Qualifications

Java
Programming languages

Full 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

Software Engineer II

Who is Mastercard?
Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.

Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.

Overview
The Decision Management Program (DMP) delivers industry‑leading intelligence that enables faster, smarter decisioning at global scale across the payment journey and beyond. Through a suite of products, DMP structures and applies complex business logic to help teams manage risk, adapt quickly to changing regulatory, geopolitical, or market conditions, and drive profitable customer engagements. Built for resiliency, availability, and future growth, DMP empowers Mastercard’s market-facing programs with agile, intelligent decision management capabilities worldwide.

A Software Engineer II is an early‑career or entry‑level engineer who contributes to the design, development, testing, and maintenance of software solutions under the guidance of more senior engineers. This role is ideal for individuals who have a strong foundation in software development fundamentals and are eager to grow their technical skills while delivering value to real-world systems.

Software Engineer II roles follow clearly defined guidelines and focus on building core engineering skills, understanding enterprise systems, and learning Mastercard’s engineering standards and processes.

Role

The role provides foundational exposure to secure, scalable service development, encryption technologies, and enterprise engineering standards. Working within Agile delivery teams, the Software Engineer II collaborates with experienced engineers to help deliver high‑quality, reliable, and security‑critical software components.
Contribute to the design, development, testing, and implementation of software solutions under guidance from senior engineers
Develop and maintain application code in accordance with established engineering, quality, and security standards
Create and execute unit tests and support automated testing efforts
Participate in code reviews and incorporate feedback
Assist with troubleshooting, defect resolution, and application support
Collaborate with cross‑functional teams to deliver assigned work on schedule
Adhere to audit, compliance, and information security requirements

All About You / Experience

Bachelor’s degree in computer science, Engineering, Information Technology, or equivalent experience
Foundational knowledge of software engineering concepts and the software development lifecycle
Experience with one or more programming languages (Java is a must)
Familiarity with Agile development practices, testing concepts, and version control
Strong analytical, problem‑solving, and communication skills
Ability to work effectively in a collaborative, team‑based environment

Willingness to learn new technologies and tools

#LI-FT1

Pay Ranges

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

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 [email protected] 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.

Apply Now

Refine Your Search

computer systems jobs in o'fallon, mo

Software Engineer II

Computer Technician Apprentice

Mid-Level Systems Administrator

Technical Support - Entry Level

Elementary Computer Teacher

Entry-Level Software Developer

Urology Clinical Pathway Manager

Bilingual Collection Representative

Field Service Technician

Quality Control (QC) Supervisor

MAINTENANCE TECHNICIAN

Construction Manager - Architect Engineer

Salesforce Administrator

Senior CAD Technician

Electrical Engineer

Foster Care Case Manager

Director of Inventory Planning

Orientation Coordinator

Assistant Store Manager

Home Modification Carpenter

I want to receive the latest job alert for computer systems in o'fallon, mo

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