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Software Engineering Jobs in Washington, MO (NOW HIRING)

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

Mastercard software engineering teams leverage Agile development principles, advanced development and design practices, and an obsession over security, reliability, and performance to deliver ...

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

Mastercard software engineering teams leverage Agile development principles, advanced development and design practices, and an obsession over security, reliability, and performance to deliver ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

For engineering applicants, Send offers the opportunity to build and operate a large-scale, real ... You will combine strong software engineering expertise with operational excellence practices to ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Strong hands-on experience in software engineering, including development and quality engineering Proven experience working with: Testing across platforms: Linux and web applications Automation ...

Principal Software Engineer

Chesterfield, MO · On-site

$133K - $179K/yr

Qualifications * 7+ years of professional software engineering experience with .NET (or Java ecosystem) and modern JavaScript frameworks (React, Angular, etc.). * Strong background in Ecommerce ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

For engineering applicants, Send offers the opportunity to build and operate a large-scale, real ... You will combine strong software engineering expertise with operational excellence practices to ...

This role requires deep technical expertise, end-to-end ownership, and the ability to lead complex engineering initiatives. Role Software Design & Architecture Lead end-to-end software design and ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Strong hands-on experience in software engineering, including development and quality engineering Proven experience working with: Testing across platforms: Linux and web applications Automation ...

This role requires deep technical expertise, end-to-end ownership, and the ability to lead complex engineering initiatives. Role Software Design & Architecture • Lead end-to-end software design and ...

Senior Software Engineer - Java

O Fallon, MO · Hybrid

$116K - $153K/yr

The successful candidate will partner closely with Product, Engineering, Risk, Architecture, and ... Apply strong software engineering practices, including object-oriented design, design patterns ...

New

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... Software Engineering & Development • Design, build, test, deploy, and maintain software components, automation frameworks, and validation tools • Apply strong knowledge of data structures ...

What You Will Do Software Architecture & Engineering Leadership - Lead software design and architecture decisions across multiple teams and platforms. - Define engineering standards for software ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... Software Engineering & Development • Design, build, test, deploy, and maintain software components, automation frameworks, and validation tools • Apply strong knowledge of data structures ...

Role: Design, develop, and maintain high-quality, scalable C/C++ software that meets Mastercard's engineering and security standards. Deliver user stories within Agile sprint timelines while ...

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

Role: • Design, develop, and maintain high-quality, scalable C/C++ software that meets Mastercard's engineering and security standards. • Deliver user stories within Agile sprint timelines while ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

This role blends Software Engineering (deterministic systems and reliable services) with AI Engineering (model lifecycle, monitoring, and continuous improvement of probabilistic systems). Role ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Design, develop, test, deploy, and maintain software applications while applying software engineering best practices, secure coding standards, and effective use of data structures Perform system ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Job Overview: Responsible for the analysis, design ... engineering best practices, secure coding standards, and effective use of data structures • ...

Showing results 41-60

Software Engineering information

See Washington, MO salary details

$56.2K

$130.5K

$181.7K

How much do software engineering jobs pay per year?

As of Sep 3, 2026, the average yearly pay for software engineering in Washington, MO is $130,462.00, according to ZipRecruiter salary data. Most workers in this role earn between $106,100.00 and $153,000.00 per year, depending on experience, location, and employer.

What is software engineering?

Software engineering is the discipline of designing, developing, testing, and maintaining software applications and systems. It involves applying engineering principles and systematic methods to ensure software is reliable, efficient, and meets user requirements. Software engineers work with programming languages, frameworks, and tools to solve problems and build solutions for various industries. The field encompasses many specializations, including front-end development, back-end development, DevOps, and more.

What are the key skills and qualifications needed to thrive as a software engineer, and why are they important?

To thrive as a Software Engineer, you need strong programming skills in languages such as Python, Java, or C++, along with a solid understanding of computer science fundamentals and a relevant degree. Familiarity with development tools like Git, cloud platforms, version control systems, and knowledge of software development methodologies are typically required. Problem-solving abilities, effective communication, and teamwork are valuable soft skills that help engineers collaborate and deliver high-quality solutions. These skills and qualities are essential to create efficient, maintainable software and to adapt to rapidly evolving technologies and project requirements.

What are some common challenges software engineers face when working on large-scale projects, and how can they be addressed?

Software engineers working on large-scale projects often encounter challenges such as managing codebase complexity, coordinating with distributed teams, and ensuring consistent coding standards. To address these issues, teams typically implement version control systems, conduct regular code reviews, and use agile methodologies to break tasks into manageable sprints. Effective communication tools and clear documentation also play a crucial role in keeping everyone aligned and minimizing misunderstandings.

What is the difference between Software Engineering vs Software Development?

AspectSoftware EngineeringSoftware Development
CredentialsBachelor's in Computer Science or related, certifications like CSWA or AWSBachelor's in Computer Science or related, coding bootcamps
Work EnvironmentDesigning, planning, and managing software projectsWriting, testing, and debugging code
Industry UsageUsed across tech, finance, healthcare, and more for complex systemsCommon in startups, small teams, and for app development

Software engineering involves designing and managing software projects, focusing on architecture and lifecycle. Software development primarily centers on coding and building applications. While both roles require similar educational backgrounds, software engineers often handle broader project planning, whereas developers focus on coding tasks.

Is software engineering a well paying job?

Software engineering is generally a well-paying profession, with median salaries often higher than many other fields, especially for those with experience, specialized skills, or certifications. Salaries can vary based on location, industry, and level of expertise, but it is considered a lucrative career choice overall.

What jobs can a software engineer do?

A software engineer can work in roles such as application developer, systems engineer, web developer, mobile app developer, or software architect. They often design, develop, test, and maintain software solutions using programming languages like Java, Python, or C++, and may work in various industries including technology, finance, healthcare, and gaming.

What work will a software engineer do?

A software engineer designs, develops, tests, and maintains software applications and systems. They write code using programming languages, collaborate with teams to solve technical problems, and often use tools like version control systems and development environments. Their work may also involve debugging, documentation, and ensuring software meets quality standards.

What cities near Washington, MO are hiring for Software Engineering jobs?

Cities near Washington, MO with the most Software Engineering job openings:

Infographic showing various Software Engineering job openings in Washington, MO as of August 2026, with employment types broken down into 84% Full Time, 13% Part Time, and 3% Contract. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $130,462 per year, or $62.7 per hour.

Software Engineer II

MasterCard

O Fallon, MO • On-site

$91K - $124K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 13 days ago


Job description

Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 IIOverview:
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 individual strengths, views and experiences drives a global and collaborative culture of inclusion and sense of belonging.
Mastercard software engineering teams leverage Agile development principles, advanced development and design practices, and an obsession over security, reliability, and performance to deliver solutions that delight our customers. We're looking for talented software development engineers to develop advanced technologies and applications that are revolutionizing payments.
Are you passionate about software engineering?
Do you enjoy seeing the impact your code has on a wide range of customers?
Do you want to work for a company that offers above-and-beyond benefits, including paid parental leave, flexible work hours, gift matching, and volunteer incentives while encouraging your professional learning and development?
Do you thrive in an environment where you are continuously learning and growing your skills and career?
Do you want to join a company that offers a competitive benefits and rewards program that attracts, develops, and retains talented employees around the world?
Do you want to join an inclusive culture where employees, in all their diversity, feel valued, respected, and empowered to bring their authentic selves to work? Learn more in Mastercard's Corporate Sustainability Report.
The Bill Pay suite of applications supports an electronic payment network that enables consumer bill payments for approximately 95 percent of electronic bill payment industry service providers in the U.S. region. Our new product, Bill Pay Exchange, will improve the consumer bill payment experience through simplified bill linking, additional payment options, and biller suggestions.
Role
Serve as a hands-on developer who writes high-quality, secure, modular, functional, and testable code to support the Bill Pay Program.
Contribute to all phases of the software development lifecycle, including design, development, documentation, testing, deployment support, and ongoing maintenance.
Participate in software design and architecture discussions, contributing to scalable, reliable, and performant solutions.
Develop and maintain unit, functional, and integration tests to validate software components and improve overall quality.
Support performance engineering efforts by helping analyze, tune, and optimize applications for reliability, efficiency, and scalability.
Participate in code reviews to help ensure code quality, maintainability, security, and adherence to engineering standards.
Take ownership of the team's software, including maintenance characteristics, runtime properties, dependencies, hardware, operating system, build, and operational readiness.
Troubleshoot, diagnose, and resolve technical issues across development, testing, and production-like environments.
Communicate, collaborate, and work effectively in a global, cross-functional environment.
About You
Degree in Computer Science or a related field, or equivalent practical experience.
Strong foundation in algorithms, data structures, and core computer science concepts.
Strong technical experience with Java, Java/J2EE, Linux, Oracle, and SQL programming.
Strong knowledge of Java, Spring Boot, Spring Batch, Hibernate, and REST API services.
Strong knowledge of Linux and shell scripting.
Experience with secure coding practices and building reliable, maintainable software.
Experience contributing to software design, code reviews, testing, troubleshooting, and operational support.
Strong analytical and problem-solving skills, with the ability to diagnose and resolve technical issues systematically.
Ability to manage multiple priorities and meet deadlines in a fast-paced environment.
Experience working in an Agile environment.
Strong written and verbal English communication skills.
Experience with EXTJS for UI development is a plus.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.

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