Explore 3 senior java developer jobs from 2 hiring companies in Bourbon, MO, US. Filter by remote, salary, experience, and company, then open any listing to apply.

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Senior Java Developer Jobs

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Software Developer III - Distributed Engineering Workstation (Power Flow Software) 

Software Developer

Full-time exempt role seeking an experienced full-stack developer for the DEW product; 8+ years in software development; power systems/energy domain familiarity; proficient in C++, C#, Java; distributed systems; GIS/SQL.

Where Human Connection Fuels Possibility ​At Maritz, decades of innovation and perseverance have built more than just a strong reputation — they’ve shaped a culture where human connection and collaboration are at the heart of everything we do. ​Joining Maritz means becoming part of a workplace grounded in a critical truth; people and their potential is our greatest resource. ​Maritz helps companies achieve their business goals by inspiring people to perform their best. We design experiences, incentives, and recognition programs that spark action and deliver measurable impact.​And we’ve brought this human-first design inward – intentionally building teams that care for each other and collaborate powerfully. In our most recent employee survey, nearly 90% of respondents said that their managers care about their concerns and 82% said they feel genuinely appreciated. We know that when employees feel seen, supported, and celebrated for who they are, they thrive and so does our business. ​That’s why we’ve created a flexible, environment that empowers you to do your best work without sacrificing what matters most to you. In fact, in that same survey, nearly 90% of respondents said they have the flexibility they need to balance work and personal life and nearly 80% said Maritz does a great job prioritizing employee well being.​We have a passion for excellence and genuine care for the people making it possible.We’re looking for a collaborative and solutions-oriented Software Engineer to support the design, development, and enhancement of business applications. This role blends hands-on development with client interaction, problem-solving, and mentorship, making it ideal for someone who enjoys both technical execution and strategic contribution.What You’ll Be Doing<ul><li>Develop, enhance, and maintain software applications using established development methodologies</li><li>Collaborate closely with client teams to deliver solutions aligned with business needs and processes</li><li>Participate in client meetings, gather feedback, and ensure deliverables meet expectations</li><li>Contribute to the design, development, and implementation of business applications and technical solutions</li><li>Lead or support development efforts on projects of varying size and complexity</li><li>Facilitate problem-solving sessions with internal teams, clients, and stakeholders to drive improvements and innovation</li><li>Serve as a subject matter expert for key technologies and products, providing insights and recommendations</li><li>Respond to client inquiries and present complex system concepts in a clear, concise manner</li><li>Research emerging technologies and industry trends to identify opportunities for innovation and process improvement</li><li>Mentor and support less experienced developers, helping to build team capability and technical skill sets</li><li>Partner with IT leadership to support budgeting efforts and identify cost-effective solutions</li></ul>What You’ll Bring<ul><li>Bachelor’s degree in Computer Science or equivalent practical experience</li><li>8&#43; years of experience in software engineering, application development, or technical architecture</li><li>Strong proficiency in Java, JEE, Spring, JavaScript, Node.js, and TypeScript</li><li>Experience building scalable applications using design patterns, concurrency, and caching strategies</li><li>Solid experience developing RESTful APIs and working with SQL based databases</li><li>Recent hands-on experience building single-page applications (SPAs) using modern frameworks such as Angular, React, or Vue.js</li><li>Experience writing and maintaining unit tests across front-end and service layers (e.g., JUnit, Mockito, Jasmine, Karma)</li><li>Familiarity with containerization technologies such as Docker</li><li>Strong understanding of web technologies including HTML, CSS, DOM, XML, and JSON</li><li>Experience working with build and CI/CD tools such as Maven, Gradle, Jenkins, Gulp, or Grunt</li><li>Ability to design and document technical solutions, including building reusable frameworks, utilities, or reference implementations</li><li>Knowledge of secure coding practices and experience with authentication/authorization protocols (e.g., OAuth, SSO, MFA, LDAP, IAM, TLS)</li><li>Experience working in Agile environments (Scrum, Kanban) and using tools such as Jira, Confluence, Rally, or simila</li></ul>Nice to Have<ul><li> Exposure to cloud platforms, preferably AWS (EC2, S3, Lambda, RDS, SQS, etc.)</li></ul>Things You Should Know<ul><li>This team primarily operates in a remote environment, with occasional in-office presence as needed.</li></ul>DISCLAIMER: This job description is designed to indicate the general nature and level of work performed by associates within this classification. It is not designed to confirm or be interpreted as a comprehensive summary of all duties, responsibilities and qualifications required of associates assigned to this job.Maritz offers a comprehensive benefits package for full-time employees including medical, dental, vision, life insurance, disability, paid parental leave, 401k, tuition reimbursement, paid time off, year end holiday closure, and more!View all details at: <a target="_blank" href="http://www.MaritzBenefits.com">www.MaritzBenefits.com</a>   Maritz will only employ applicants who have authorization to work permanently in the U.S. This is not a position for which sponsorship will be provided. Those who need sponsorship for work authorization now or in the future are not eligible for hire. No calls or agencies please.Maritz is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to sex, race, color, religion, national origin, age, marital status, political affiliation, sexual orientation, gender identity, genetic information, disability or protected veteran status. We are committed to providing a workplace free of any discrimination or harassment.If you have a disability and are having difficulty accessing or using this website to apply for a position, you can request help by calling 1-636-827-0380 or by sending an email to <a target="_blank" href="mailto:recruitment&#64;maritz.com">recruitment&#64;maritz.com</a>.

Software Engineer

8+ years in software engineering; strong Java/JEE/Spring/JavaScript/Node.js/TypeScript; REST APIs; SPA frameworks; SQL databases; CI/CD; Agile.

Our PurposeMastercard powers economies and empowers people in 200&#43; 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<h3></h3>Lead Software Engineer - QE<h3></h3>Overview: 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. Team Overview: Decision Management Program (DMP) is a sophisticated, industry-leading intelligence with a range of capabilities that structure and apply complex business logic across the payment journey and beyond to inform and accelerate decisions at scale at Mastercard. The Authorization Decisioning product within DMP combines DMP's powerful capabilities with access to all authorization messages available within Mastercard. With access to the full extent of transactions as they happen, Authorization Decisioning can extract intelligence, add intelligence, and make decisions, all customizable to market-facing products. With the ability to bi-directionally consume and apply intelligence, Authorization Decisioning can transform insights into immediate operational action. The DMP team is looking for someone to join the Authorization Decisioning product as Quality Engineering Lead for driving the adoption of Quality Engineering services—including code quality, test automation, performance engineering, environment automation, development collaboration, and continuous integration across multiple agile feature teams . You will collaborate closely with Quality Engineers, Developers, Operations, DevOps, Product Management, and Program Management to define scope, influence best practices, and deliver high‑impact services that enable flawless customer experiences. Role: Lead quality engineering strategy, automation, and exploratory testing across web, mobile, and API platforms. Drive adoption of QE, performance engineering, CI/CD, and environment automation practices. Implement BDD/TDD, ensure strong code quality, and achieve high automation and code coverage. Provide technical oversight on test automation, code reviews, quality metrics, and engineering best practices. Partner with engineering, DevOps, operations, and product teams to define test strategy and automation scope. Understand end-to-end customer flows and ensure quality across the entire value chain. Oversee integration of test automation with Jenkins/Bamboo, Sonar, and other quality tools. Guide teams on performance testing using JMeter/LoadRunner and support continuous delivery pipelines. Mentor and develop Quality Engineers in a fast-paced, high‑performance culture. Develops and executes performance testing strategies, automation, and best practices to ensure end‑to‑end application reliability and efficiency. Provide production support and when needed reproduce issues across multiple applications and collaborate in driving their resolution. Collaborate with cross‑functional teams to ensure high-quality, customer‑focused delivery. All About You: 12-14 years’ experience in software test automation and quality engineering. Strong Java coding skills; hands-on with Spring, JUnit, Rest Assured, Appium. Expertise with Cucumber/JBehave, REST/SOAP API testing, CI/CD pipelines. Experience with quality tools (Sonar, Clover), security tools (Checkmarx, Fortify), and performance tools (JMeter, LoadRunner). Knowledge of payments domain, design patterns, and ISO message protocols preferred. Familiarity with cloud, Infrastructure‑as‑Code (Chef/Puppet), and device cloud testing platforms. Familiarity with lifecycle tools such as JIRA, Rally, Rational Team Concert. Strong communication skills, including presenting to technology and business leaders. Proven ability to lead teams and drive engineering excellence. Demonstrated success in large-scale automation and testing initiatives. Strong communication, influencing, and mentoring skills.<h3></h3>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.<h3></h3>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:<ul><li>Abide by Mastercard’s security policies and practices;</li><li>Ensure the confidentiality and integrity of the information being accessed;</li><li>Report any suspected information security violation or breach, and</li><li>Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.</li></ul><h3></h3>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 RangesO'Fallon, Missouri: $140,000 - $231,000 USD<h3></h3><h3></h3><h3></h3><h3></h3>

Lead Software Engineer - QE

12-14 years in software test automation and quality engineering; strong Java with Spring/JUnit; REST/SOAP API testing; CI/CD; experience with QE tools and performance testing.

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Senior Java Developer Jobs in Bourbon, MO, US

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