Top 29 Spring interns Jobs in O'fallon, Mo

Software Engineer ||
Mastercard —O'Fallon, MO
- $92,000 - $147,000 a year
- Online Application
- Computer Science
- Mid-level
- Office
- Paid jury duty
- Health savings account
Software Engineer II
Mastercard —O'Fallon, MO
- $92,000 - $147,000 a year
- Online Application
- System design
- Mid-level
- SQL
- Paid jury duty
- Health savings account
Police Intern
St. Louis County —St. Louis, MO
- Full-time
- Reliable transportation
- Internship
- Entry level
Senior Software Engineer
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Computer science
- Computer Science
- System design
- Paid jury duty
- Health savings account
Winter/Spring 2027 Consulting Services Intern - Information Technology Risk Services (ITRS)
RubinBrown LLP —St. Louis, MO
- Full-time
- Hybrid work
- Computer Science
- ERP systems
- Office
Quick Apply
Winter/Spring 2027 Consulting Services Intern - Risk Services
RubinBrown LLP —St. Louis, MO
- Full-time
- Office
- Finance
- Master's degree
Quick Apply
Police Intern
St. Louis County, MO —Saint Louis County, MO
- Full-time
- Pass drug screening
- Reliable transportation
- Internship
Winter/Spring 2027 Entrepreneurial Services Group Intern
RubinBrown LLP —St. Louis, MO
- Microsoft Excel
- Research
- Internship
Quick Apply
Senior Software Engineer– RPPS Platform
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- System design
- Databases
- Mentoring
- Paid jury duty
- Health savings account
5d
Lead Site Reliability Engineer
Mastercard —O'Fallon, MO
- $122,000 - $207,000 a year
- Online Application
- Computer science
- Computer Science
- Bachelor of Science
- Paid jury duty
- Health savings account
Lead Software Engineer
Mastercard —O'Fallon, MO
- $140,000 - $231,000 a year
- Online Application
- System design
- Research
- Mentoring
- Paid jury duty
- Health savings account
10d
Manager, Software Engineering
Mastercard —O'Fallon, MO
- $140,000 - $231,000 a year
- Online Application
- Oracle
- Computer Science
- Office
- Paid jury duty
- Health savings account
Senior Software Engineer - Java Full Stack Engineer
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Computer science
- 7 years
- Computer Science
- Paid jury duty
- Health savings account
Coordinator of Student Engagement & Campus Traditions
FTSE - Full Time Staff Exempt —St. Louis, MO
- $40,000 - $50,000 a year
- Full-time
- Management
- Mid-level
- Master's degree
- Free parking
- Paid holidays
3h
Supervisor Trainee Internship Fall 2026
Enterprise Mobility —St. Louis, MO
- $17.25 an hour
- Temporary
- 18 years or older
- Customer service
- US work authorization
- Paid training

More jobs to discover

Find similar jobs that you might be interested in.

Software Engineer II
Mastercard —O'Fallon, MO
Contribute to the design, development, testing, and implementation of software solutions under guidance from senior engineers.
$92,000 - $147,000 a year
Business Rule Author - Software Engineer II
Mastercard —O'Fallon, MO
Have current experience in delivering technical solutions and capabilities to meet business and product strategies, including a focused relationship with…
$92,000 - $147,000 a year
5d

Show more similar jobs

Explore jobs in cities nearby

Check out jobs in cities near your current location, Columbus

Social Media Intern
Mid-Ohio Food Collective —Grove City, OH
A Strategic Creator: You're currently studying Marketing, Communications, PR, or a related field and understand how to build a brand voice.
From $17.50 an hour
Quick Apply
Reverse Engineer/Vulnerability Research Co-op (Spring 2027)
Battelle —Columbus, OH
Current enrollment in an Associate, Bachelor, or Master degree program in Computer Science, Computer Engineering, or any other related field of study.
$19.61 - $39.62 an hour
11d

Show more jobs in cities nearby

I want to receive the latest job alert for spring interns in o'fallon, mo

By signing in to your account, you agree to SimplyHired's Terms of Service and consent to our Cookie and Privacy Policy.

Explore jobs in more locations

spring interns jobs near o'fallon, mo

Software Engineer ||

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

Secure web application development
Software engineering
Test Automation Development (Quality assurance practices)
Confidential information handling
Computer Science
JUnit
Software Engineering
Engineering development testing
RESTful API
Data structures
Mid-level
JavaScript frameworks
Analysis skills
Bachelor's degree
Algorithm design
JPA
Software documentation
Vulnerability management
Developing and maintaining backend systems
Agile software development
Application Maintenance
Front-end component implementation
Back-end integration
Application support
Bachelor's degree in software engineering
Bachelor's degree in computer science
Communication skills
Design (software development lifecycle)
Spring Framework
Mockito

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 ||

Overview

At Mastercard, our industry expertise is enhanced by our commitment to being a force for good in the world and to doing well by doing good. Mastercard relies on our global workforce to help us achieve our goal of building a sustainable, inclusive global economy. The Mastercard Way encourages us, connects us with the behaviors that represent the essence of not only what we do but who we are as an organization. Cultivating an environment for all employees that respects their strengths, views, and experiences drives a global and collaborative culture of inclusion and a sense of belonging.

About the Role

At Mastercard Corporate Solutions, we empower businesses to succeed through innovative, trusted payment solutions that deliver a seamless, digital-first experience around the world. We’re building a global business-to-business (B2B) technology platform to help businesses of all sizes streamline how they manage payments when buying or selling products and services.

The Mastercard Corporate Solutions team is looking for a Software Engineer II to drive our customer experience strategy forward by consistently innovating and problem-solving. The ideal candidate is passionate about the customer experience journey, highly motivated, intellectually curious, and analytical.

Mastercard software engineering teams leverage Agile development principles, advanced development and design practices, and bring an obsession with security, reliability, and performance to deliver solutions that delight our customers. We are looking for talented software engineers to develop advanced technologies and applications that are revolutionizing payments.

Role

A hands-on full stack engineer that can code and build high quality secure front end and REST API/backend that is modular, functional, and testable.
Contribute to all parts of the software’s development including design, development, test, deployment, support, documentation, configuration
Participate in all the scrum ceremonies using Agile methodology.
Have strong ownership of your team’s software and are deep in the maintenance characteristics, runtime properties, dependencies, and build.
Communicate, collaborate, and work effectively in a team environment.

All About You

Strong foundation in algorithms, data structures, and core computer science concepts.
Evidence of working with object-oriented development and design patterns.
Full stack developer with ability to write secure code in backend & frontend programming languages (Java, JavaScript, Angular, SQL) and familiar with secure coding standards

and vulnerability management

Good knowledge of Spring, Spring Data JPA, REST and other frameworks.
Understands and builds test code at unit level, service level, and integration level to ensure code and functional coverage (e.g. JUnit, Mockito, Jasmine etc)
Strong written and verbal communication skills.
Strong analytical and excellent problem-solving skills
Self Starter, Proactive and Passionate about continuous improvement and delivering results
Thrives in an environment that is fast-paced and customer-oriented
Working knowledge of an Agile environment.
Bachelor’s degree in computer science, Software Engineering, or a related field preferred

(This role operates in a hybrid capacity to come onsite 3x week in our O'Fallon location)

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.

Pay Ranges

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

Apply Now

Refine Your Search

spring interns jobs in o'fallon, mo

Software Engineer ||

Software Engineer II

Police Intern

Senior Software Engineer

Winter/Spring 2027 Consulting Services Intern - Information Technology Risk Services (ITRS)

Winter/Spring 2027 Consulting Services Intern - Risk Services

Police Intern

Winter/Spring 2027 Entrepreneurial Services Group Intern

Senior Software Engineer– RPPS Platform

Lead Site Reliability Engineer

Lead Software Engineer

Manager, Software Engineering

Senior Software Engineer - Java Full Stack Engineer

Coordinator of Student Engagement & Campus Traditions

Supervisor Trainee Internship Fall 2026

More jobs to discover

Explore jobs in cities nearby

I want to receive the latest job alert for spring interns in o'fallon, mo

Related Searches

Explore jobs in more locations

Job Seeker Tools

Employer Tools

Browse

Stay Connected