Top 89 Java developer Jobs in O'fallon, Mo

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
9d
Software Developer II - Meter Data Management Software (Full Stack, Databricks)
National Information Solutions Cooperative (NISC) —Lake Saint Louis, MO
- Hybrid work
- Computer science
- Computer Science
- 5 years
- Health savings account
- Paid holidays
12d
DevOps Engineer
Absolute Business Solutions Corp —St. Louis, MO
- $180,000 - $225,000 a year
- 8 hour shift
- Hybrid work
- Computer science
- Mid-level
- Military encouraged
- Paid time off
- 401(k) matching
Sr. Programmer Analyst
Sovereign Technologies —St. Louis, MO
- Computer Science
- 5 years
- Bachelor of Science
Lead Software Engineer
Delan Associates, Inc —O'Fallon, MO
- Contract
- Hybrid work
- Computer Science
- Bachelor of Science
- Java
Quick Apply
Mobile Application Developer
Bridgesoft —Pacific, MO
- Computer science
- Computer Science
- Software troubleshooting
Lead Software Development Engineer
Mastercard —O'Fallon, MO
- $140,000 - $231,000 a year
- Online Application
- System design
- Mentoring
- Senior level
- Paid jury duty
- Health savings account
Senior Embedded Software Engineer
Leonardo DRS —Bridgeton, MO
- $93,121 - $125,713 a year
- Full-time
- Hybrid work
- Computer Science
- 5 years
- Office
- Paid parental leave
- Health savings account
Senior Software Engineer
TaxPlanIQ —United States
- $100,000 - $140,000 a year
- Email
- Remote
- Background check
- System design
- Java
- Health insurance
- Dental insurance
Quick Apply
Staff Software Engineer - Full Stack
Ark PES —United States
- $150,000 - $205,000 a year
- Full-time
- Remote
- 7 years
- Computer Science
- Research
- Paid holidays
- Health insurance
Quick Apply
Principal Software Engineer - Full Stack
Ark PES —United States
- $130,000 - $180,000 a year
- Full-time
- Remote
- Computer Science
- Research
- Java
- Health insurance
- Dental insurance
Quick Apply

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Software Developer II - Meter Data Management Software (Full Stack, Databricks)
National Information Solutions Cooperative (NISC) —Lake Saint Louis, MO
Participate in architectural and technical design discussions and contribute to technical direction. Design, develop, test, and maintain full‑stack applications…
12d

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Software Engineer - AI Trainer
DataAnnotation —Ohio
Flexible schedule: choose which projects you take on and when you work, on your own computer, from the comfort of your own home.
$50 - $100 an hour
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Java Developer - Direct Hire - Dublin, OH - Hybrid (local candidates only) - W2 only
Stafford Technology —Dublin, OH
Strong in algorithms, data structures, and system design. Collaborate with cross-functional teams and mentor developers. Experience with Angular, RxJS, NgRx.
$80,000 - $100,000 a year
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3d

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java developer jobs near o'fallon, mo

Senior Software Engineer

Mastercard -
O'Fallon, MO

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Job Details

Full-time
$115,000 - $184,000 a year
9 days ago

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

Spring Boot
Kubernetes
System performance optimization
System design
Scalable systems
Development environments
System design for system development
Cloud development
Scalability
Integration testing
Distributed computing
Multithreading
PL/SQL
Design (software development lifecycle)
Shell Scripting
Providing code feedback
Production troubleshooting

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

Senior Software Engineer

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 Fraud Products team develops fraud prevention and identity verification solutions on Mastercard's Decision Management Platform. Our high-performance Java platform processes billions of transactions each month, delivering the scale, speed, and reliability that power Mastercard's global payments network.

Role

Design, develop, and support scalable, high-performance applications.
Build secure, reliable, and maintainable solutions for complex business challenges.
Participate in Agile development, design reviews, code reviews, and security reviews.
Troubleshoot production issues and optimize applications for performance and reliability.
Drive engineering best practices, automation, and continuous improvement.
Collaborate with global teams to deliver software at scale.

All About You

Strong experience with Java/J2EE, Spring Boot, and distributed systems.
Experience building and supporting high-performance, highly available applications.
Strong understanding of software design, architecture, data structures, secure coding, and testing practices.
Experience troubleshooting production issues and improving system performance, scalability, and reliability.
Experience with code reviews, operational excellence, and production support.
Hands-on experience with Kubernetes, Cloud Foundry, Linux, Shell Scripting, Oracle/PLSQL, and SQL.
Experience working in Agile development environments.
Bachelor's degree in Computer Science or related field, or equivalent experience.

Required Technical Skills

Core Java (including multithreading)
Java/J2EE
Spring Framework / Spring Boot
Distributed Systems & Distributed Computing at Scale
Kubernetes, Cloud Foundry
Linux & Shell Scripting
Oracle, PL/SQL, Advanced SQL
Software Design & Architecture
Secure Coding Practices
Unit, Functional & Integration Testing
Performance Engineering
Code Reviews & Troubleshooting
IntelliJ or JBoss Developer Studio

Desirable Skills

Experience with distributed computing platforms and in-memory data grid technologies at scale, such as:

GemFire
Apache Spark
Distributed Redis
Hazelcast
GridGain / Apache Ignite

MQ/JMS messaging technologies
Solaris/UNIX or Red Hat Linux
Experience integrating vendor and open-source solutions into enterprise platforms

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: $115,000 - $184,000 USD

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Refine Your Search

java developer jobs in o'fallon, mo

Senior Software Engineer

Software Developer II - Meter Data Management Software (Full Stack, Databricks)

DevOps Engineer

Sr. Programmer Analyst

Lead Software Engineer

Mobile Application Developer

Lead Software Development Engineer

Senior Embedded Software Engineer

Senior Software Engineer

Staff Software Engineer - Full Stack

Principal Software Engineer - Full Stack

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