Explore 4 java backend developer jobs from 1 hiring companies in Sullivan, MO, US. Filter by remote, salary, experience, and company, then open any listing to apply.

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Java Backend Developer Jobs

Mastercard

Onsite

Hybrid

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>Senior Software Engineer<h3></h3>Who is Mastercard? We work 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. We cultivate a culture of inclusion for all employees that respects their individual strengths, views, and experiences. We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation, and delivers better business results. About the Role The ABU team enables issuers and acquirers to securely communicate account changes for credential-on-file and recurring payments to merchants—increasing approval rates for card-not-present transactions, improving customer satisfaction, and reducing customer service demand. We’re continuously making our services faster, more reliable, and scalable to meet emerging on-soil regulations and rising global demand. Our vision: Consumers never have to think about where their payment credentials are stored. Our value proposition: Reduce preventable declines and ensure a seamless cardholder experience when credential-on-file data changes. We are modernizing the ABU platform and seeking strong, innovative Software Engineers with experience in domain-driven design. We're looking for individuals who can bring fresh perspectives, enjoy solving complex problems, and thrive in a dynamic, team-oriented environment. If you're passionate about building great software and ready to grow your career, we’d love to hear from you. Role As a Senior Software engineer, you will be responsible for development, deployment support, owning the delivery of user stories, mentoring junior team members, and performing code reviews. This is a vital role responsible for planning, developing, and coordinating all activities related to design, development, and implementation. We are seeking a highly motivated, detail-oriented, and proactive engineer who has the ability to operate under pressure in an independent, autonomous environment. Hands-on developer who can design, develop, test, implement, and maintain software applications that align with Mastercard engineering standards and best practices. Develop backend services in Java, leveraging frameworks like Spring and GRPC for high-performance applications. Manage individual project priorities, deadlines, and deliverables. Actively participate in agile ceremonies including daily scrum, story pointing, story elaboration, and retrospectives. Ensure adherence to established quality control practices and software development processes. Collaborate across teams with exceptional peers who are passionate about what they do. All About You Solid technical foundation with a degree in Computer Science or related field, preferred. Strong hands-on experience in backend development with applicable JAVA technologies (Core JAVA, Spring Integration, Spring Boot, REST/SOAP web services). Experience in technical design activities to ensure alignment with Non-Functional Requirements, Solution Architecture and System Functional Design specifications. Ability to understand user stories and requirements, contribute to proposed solution designs, and translate these into coded features or solutions that are simple, functional, scalable, and maintainable. Proficiency with advanced object-oriented programming. Experience and understanding of messaging solutions, such as Apache Kafka. Proven experience working with Oracle/SQL Databases Knowledge of cloud native development such as Pivotal Cloud Foundry (PCF), AWS, etc. Strong knowledge of automated build, deployment and continuous integration systems. Experience with CI/CD tools like Jenkins, Bitbucket, Artifactory, Atlassian suite, etc., Passion for solving varied and complex real-world problems. Strong communication skills (verbal and written), strong relationships, collaborative skills, and organizational skills. Proven abilities to work and communicate cross-functionally with key stakeholders, such as Technical Leads, Solution Architects, Product Managers, Release Managers and Application Services and Testing Teams as applicable to ensure quality delivery.<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: $115,000 - $184,000 USD<h3></h3><h3></h3><h3></h3><h3></h3>

Senior Software Engineer

Develop backend services in Java (Spring, Spring Boot, REST/SOAP); agile delivery, code reviews, mentoring, and collaboration.

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>Principal Software Engineer<h3></h3>Overview We are a St louis based development team building high value, cloud native applications. We are looking for brilliant and passionate software engineers to join our team. In this role you will play a leading role in building out a world class engineering team and design and implement world class innovative, high volume web applications. 	 Role 	• Design, code, document and test components / subsystems to a world class standard in an agile way 	• Be solution oriented – find and implement the ‘best fit’ solution to address the requirements on time 	• Work independently with teamwork spirit 	• Drive technology innovation within Commercial and across the company 	• Lead architectural design of various initiatives 	• Ensure adherence to established software development process 	• Share knowledge of various technologies to other team members 	• Mentor junior developers to technical leads. About You: 	• Do you love to code? 	• Do you have a passion for product design and technology innovation and have a high energy, can-do attitude and strong sense of ownership /desire to succeed? 	• Are you a talented software developer with a passion for delivering high quality, high performing and highly extensible software? 	• Do you have a strong background in developing and delivering high volume web services? Multiple examples of solutions deployed where you were a key architect and coder. 	• Current background in modern Architecture is a must. Background in Dev/Ops a distinct advantage. 	• Background in automation a distinct advantage. 	• You strive to create highly intuitive and responsive products. • You are comfortable with security concerns, authentication, authorization, and fixing vulnerabilities. Key Technology Areas: 	• Backend (Java/2JEE, Spring Boot, Python, API design, microservice architecture) 	• Frontend (CSS, HTML5, JavaScript, AngularJS) 	• Mobile (iOS, Android) 	• Database (Postgres, Oracle, MySQL, MongoDB)<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: $170,000 - $281,000 USD<h3></h3><h3></h3><h3></h3><h3></h3>

Principal Software Engineer

Strong backend and frontend development experience; proficient in Java, Python, Spring Boot, API design, and microservices; experience with cloud-native web applications; leadership and mentoring skills.

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>Software Engineer ||<h3></h3>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 &amp; 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)<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: $92,000 - $147,000 USD<h3></h3><h3></h3><h3></h3><h3></h3>

Software Engineer ||

Software Engineer

Hands-on full‑stack engineer; backend and frontend with Java, JavaScript, Angular, SQL; REST; Spring; secure coding and testing; Agile team contributor. Bachelor’s preferred.

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>Senior Software Engineer<h3></h3>Who is Mastercard? We work 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. We cultivate a culture of inclusion for all employees that respect their individual strengths, views, and experiences. We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation, and delivers better business results. About the Team Commercial &amp; New Payment Flows (CNPF) is Mastercard’s global organization dedicated to modernizing commercial payments and enabling businesses of all sizes to move money smarter, faster, and more securely. Commercial Platform Engineering (CPE) serves as the engineering backbone of CNPF, delivering the shared platform capabilities that power all Commercial products and experiences. CPE focuses on platform modernization, operational excellence, cross‑program delivery, as well as driving quality, performance, resiliency, and scalability. Within CPE, our team operates as a specialized engineering group responsible for foundational services used across Commercial programs. We are a lean, high‑impact engineering team that designs, builds, and maintains core shared services that other product teams rely on every day. Our work underpins critical capabilities across the organization, ensuring reliability and seamless integration. Role As a Senior Software engineer, you will be responsible for development, deployment support, owning the delivery of user stories, mentoring junior team members, and performing code reviews. This is a vital role responsible for planning, developing, and coordinating all activities related to design, development, and implementation. We are seeking a highly motivated, detail-oriented, and proactive engineer who has the ability to operate under pressure in an independent, autonomous environment. • Design, develop, test, implement, and maintain software applications that align with Mastercard engineering standards and best practices. • Deliver secure, reliable, and scalable software solutions within defined timelines and budgets. • Research and evaluate alternative technical approaches to meet current and future business needs. • Conduct feasibility studies, system flowcharting, and logic design to support solution development. • Collaborate with team members and stakeholders to meet project goals, identify issues early, and recommend practical solutions. All About You • Bachelor's degree in information systems, Information Technology, Computer Science or Engineering is preferred. • Strong hands-on experience in backend development with applicable JAVA technologies (Core JAVA, Spring Integration, Spring Boot, Hibernate, REST/SOAP web services). • Proven experience working with Oracle/SQL Databases. • Experience and understanding of messaging solutions, such as Apache Kafka, Axon, etc., • Strong knowledge of automated build, deployment and continuous integration systems. • Experience with CI/CD tools like Jenkins, Bitbucket, Artifactory, Atlassian suite, etc., • Strong communication skills (verbal and written), strong relationships, collaborative skills, and organizational skills. • Proven abilities to work and communicate cross-functionally with key stakeholders, such as Technical Leads, Solution Architects, Product Managers, Release Managers and Application Services and Testing Teams as applicable to ensure quality delivery. • Experience in Test-Driven Development (TDD) and Behavior-Driven Development (BDD). • Experience in solution design for simplicity, scalability and future agility. • Experience in technical design activities to ensure alignment with Non-Functional Requirements, Solution Architecture and System Functional Design specifications. • Experience with all aspects of Scrum Agile for software development activities (e.g. daily standup, backlog grooming, sprint planning). • Ability to understand user stories and requirements, contribute to proposed solution designs, and translate these into coded features or solutions that are simple, functional, scalable, and maintainable. • Experience working in the Financial Services Sector is preferred.<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: $115,000 - $184,000 USD<h3></h3><h3></h3><h3></h3><h3></h3>

Backend software engineer with Java, Spring, Hibernate, Oracle/SQL, Kafka; CI/CD; Agile; financial services experience preferred.

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