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Flexible Principal Java Software Engineer Jobs in St Louis, MO

Geodatait

Senior Software Engineer

Saint Louis, MO · On-site

$100 - $130/hr

  • Medical

  • Life

  • Retirement

  • PTO

... include Java, Web services, Database, and micro-service development software, engineering ... Flexible work environment A team mentality - work with friendly, like-minded professionals Work ...

MasterCard

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

All About You Solid understanding of Java, J2EE, Spring, Spring Boot, Kafka, RESTful Web Services ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

Mastercard, Inc.

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

All About You • Solid understanding of Java, J2EE, Spring, Spring Boot, Kafka, RESTful Web ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Build and own Java services and APIs that deliver AI-powered features, ensuring performance ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

We are looking for a Senior AI Java Engineer (Hands-on IC) to deliver AI-driven capabilities across ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

Mastercard, Inc.

Senior Software Engineer- RPPS Platform

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The position requires strong expertise in Java, Spring Boot, API development, and modern front-end ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

MasterCard

Senior Software Engineer- RPPS Platform

O Fallon, MO · Remote

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The position requires strong expertise in Java, Spring Boot, API development, and modern front-end ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Proven experience with backend development with JAVA required Familiarity with Spring Boot ... flexible spending account and health savings account; paid leaves (including 16 weeks of new parent ...

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Showing results 41-60

All JobsPrincipal Java Software Engineer JobsFlexible Principal Java Software Engineer JobsFlexible Principal Java Software Engineer Jobs in St. Louis, MO

Flexible Principal Java Software Engineer information

See St Louis, MO salary details

$80.7K

$145.5K

$195.9K

How much do flexible principal java software engineer jobs pay per year?

As of Aug 19, 2026, the average yearly pay for flexible principal java software engineer in St. Louis, MO is $145,523.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,900.00 and $160,400.00 per year, depending on experience, location, and employer.

What is a flexible principal Java software engineer?

A Flexible Principal Java Software Engineer is a highly experienced software engineer specializing in Java programming who also demonstrates adaptability in working across various projects, teams, and technologies. 'Principal' denotes a leadership role, often involving technical guidance, architecture decisions, and mentoring other engineers. The 'flexible' aspect means this professional can adjust to changing requirements, work environments, or technical stacks as needed. They are typically responsible for designing robust solutions, overseeing complex projects, and ensuring high-quality software delivery.

What are the key skills and qualifications needed to thrive as a flexible principal Java software engineer?

To thrive as a Flexible Principal Java Software Engineer, you need deep expertise in Java development, system architecture, and design patterns, typically supported by a computer science degree and extensive experience. Familiarity with frameworks like Spring, cloud platforms (AWS, Azure), CI/CD tools, and relevant certifications (like Oracle Certified Professional) are commonly required. Strong leadership, problem-solving, and communication skills help drive complex projects and mentor teams effectively. These skills ensure the delivery of robust, scalable solutions and foster technical excellence within the organization.

How does a flexible principal Java software engineer typically collaborate with cross-functional teams, and what impact does this have on project outcomes?

As a Flexible Principal Java Software Engineer, you will frequently collaborate with cross-functional teams, including product managers, UX designers, QA engineers, and DevOps specialists. This collaboration ensures that technical decisions align with business goals and user needs, leading to more robust and scalable solutions. You'll often facilitate technical discussions, mentor junior developers, and help bridge communication gaps between technical and non-technical stakeholders. Effective collaboration not only improves project outcomes but also fosters a culture of continuous learning and innovation within the team.

What is the difference between Flexible Principal Java Software Engineer vs Principal Java Software Engineer?

AspectFlexible Principal Java Software EngineerPrincipal Java Software Engineer
Required CredentialsBachelor's or Master's in Computer Science, Java certifications often preferredBachelor's or Master's in Computer Science, Java certifications often preferred
Work EnvironmentFlexible, often remote or hybrid, project-basedTypically on-site or hybrid, leadership-focused
Employer & Industry UsageTech companies, startups, consulting firmsLarge enterprises, tech firms, financial institutions
Common Search & ComparisonYesYes

The main difference is that the Flexible Principal Java Software Engineer often works in more adaptable, remote environments and may handle diverse projects, while the Principal Java Software Engineer typically holds a more traditional, leadership-focused role within larger organizations. Both roles require strong Java expertise and similar credentials, but their work settings and responsibilities can differ.

What cities near St. Louis, MO are hiring for Flexible Principal Java Software Engineer jobs?

Cities near St. Louis, MO with the most Flexible Principal Java Software Engineer job openings:

Flexible Principal Java Software Engineer jobs near you

Software Engineer - Intermediate

Equifax, Inc.

Saint Louis, MO • On-site

Full-time

Medical, Retirement, PTO

Re-posted 5 days ago

Equifax rating

7.8

Company rating: 7.8 out of 10

Based on 27 frontline employees who took The Breakroom Quiz

Job description

Equifax is where you can power your possible. If you want to achieve your true potential, chart new paths, develop new skills, collaborate with bright minds, and make a meaningful impact, we want to hear from you.
Equifax is seeking creative, high-energy, and driven software engineers with hands-on development skills to work on a variety of meaningful projects. Our software engineering positions provide you the opportunity to join a team of talented engineers working with leading-edge technology. You are ideal for this position if you are a forward-thinking, AI-augmented, and enthusiastic software engineer who is passionate about leveraging modern tools to accelerate delivery and solve complex problems.
To adhere to our corporate location policies, this resource will be required to be local to the surrounding St.Louis, MO . You are required to adhere to our Return To Office (RTO) / weekly onsite requirements (Tuesday, Wednesday, and Thursday).
This position does not offer immigration sponsorship (current or future) including F-1 STEM OPT extension support.
What you will do
  • Perform general application development activities, including unit testing, code deployment to development environment, and technical documentation. Leverage AI-assisted coding tools (e.g., GitHub Copilot) to optimize development velocity and code quality.
  • Participates in estimation process, use case specifications, reviews of test plans and test cases, requirements, and project planning. Diagnose and resolve performance issues.
  • Documents code/processes so that any other developer is able to dive in with minimal effort.
  • Develop, and operate high-scale applications from the backend to UI layer, focusing on operational excellence, security, and scalability.
  • Apply modern software development practices (serverless computing, microservices architecture, CI/CD, infrastructure-as-code, etc.). Work across teams to integrate our systems with existing internal systems, Data Fabric, CSA Toolset.
  • Actively explore and advocate for the integration of generative AI and automation tools into the team's daily workflows to eliminate repetitive tasks.
  • Participate in technology roadmap and architecture discussions to turn business requirements and vision into reality. Participate in a tight-knit engineering team employing agile software development practices.
  • Triage product or system issues and debug/track/resolve by analyzing the sources of issues and the impact on network, or service operations and quality.
  • Able to write, debug, and troubleshoot code in mainstream open-source technologies. Lead effort for Sprint deliverables, and solve problems with medium complexity.

What experience you need
  • Bachelor's degree or equivalent experience.
  • 2+ years experience working with software design and Java, Python, and Javascript programming languages.
  • Experience integrating AI development accelerators/LLM tools into your daily coding, debugging, and testing workflows.
  • 2+ years experience with software build management tools like Maven or Gradle.
  • 2+ years experience with HTML, CSS, and frontend/web development.
  • 2+ years experience with software testing, performance, and quality engineering techniques and strategies.
  • 2+ years experience with Cloud technology: GCP, AWS, or Azure

What could set you apart
  • AI-Augmented Developer: Proven track record of using generative AI tools to safely accelerate code generation, automate documentation, and optimize legacy refactoring while maintaining strict data security and code integrity guidelines.
  • Quality-First Engineer: Owns product outcomes end-to-end; expert at measuring and upholding high-quality standards across QA, UAT, and PROD using automated QE tools and JUnit.
  • Java Specialist: Advanced development in Java 17, SpringBoot, and Microservices/SOA, managing source control via Git/GitHub and builds through Maven/Gradle.
  • Independent Agile Practitioner: Self-directed contributor experienced in navigating priority shifts with minimal supervision within CI/CD (Jenkins) and Atlassian ecosystems.
  • Cloud & Innovation Forward: Cloud-ready professional (GCP/AWS/Azure Certification preferred) with a passion for staying ahead of emerging tech trends and modernizing software delivery models.

#LI-Hybrid
#LI-ES1
We offer comprehensive compensation and healthcare packages, 401k matching, paid time off, and organizational growth potential through our online learning platform with guided career tracks.
Are you ready to power your possible? Apply today, and get started on a path toward an exciting new career at Equifax, where you can make a difference!
Primary Location:
USA-St. Louis-Lackland
Function:
Function - Tech Dev and Client Services
Schedule:
Full time

What Equifax employees say

Pay

Benefits

Hours and flexibility

Workplace

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About Equifax

Sourced by ZipRecruiter

As a global data, analytics, and technology company, we play an essential role in the economy by helping companies in diverse industries such as automotive, communications, utilities, financial services, fintech, healthcare, insurance, mortgage, professional services, retail, e-commerce, and government agencies, make critical decisions with greater confidence.

Industry

It services

Company size

10,000+ Employees

Headquarters location

Atlanta, GA, US

Year founded

1899

Social media

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