Full Stack Software Developer Contract Jobs in Missouri

Position Summary...What you'll do...Role summary:
We are hiring a Senior Software Engineer to help evolve our enterprise SSO platform within IAM. You will build secure, scalable authentication services leveraging modern federation standards and contribute to AI-enabled adaptive authentication capabilities that enhance risk-based access control. This role combines deep engineering expertise with identity domain knowledge to deliver intelligent, resilient authentication systems at global scale.
About the team:
The Information Security team ensures associates can securely access Walmart systems at global scale. Within this organization, the Identity and Access Management (IAM) team builds and operates authentication, authorization, and federation platforms that power secure access across enterprise and customer-facing applications.
The SSO Engineering team develops scalable identity services that provide seamless and secure authentication experiences across web, mobile, APIs, workforce, and partner ecosystems. We focus on modern authentication standards, Zero Trust principles, and intelligent risk- based access controls.
We are looking for a Senior Software Engineer with strong backend engineering expertise and hands-on experience in authentication and identity systems.
What you'll do:

• Design, develop, and maintain scalable SSO services supporting enterprise
• Implement authentication and authorization solutions using OAuth, OIDC, and SAML
• Build secure RESTful APIs and backend services using Java, Go, or Python, and integrate with frontend systems using modern frameworks.
• Develop and enhance core authentication capabilities
• Implement phishing resistant MFA, adaptive authentication, and risk-based access controls.
• Contribute to passwordless initiatives such as FIDO2/Passkeys
• Work with cloud-native platforms (Azure/GCP) using Docker and Kubernetes.
• Enhance observability, monitoring, and reliability identity services.
• Contribute to automation and AI-enabled authentication capabilities,
• Automated remediation workflows
• Collaborate with security, platform, and application teams to integrate SSO across services.
• Participate in design reviews, code reviews, and operational incident response.

What you'll bring:

• Extensive experience in software development life cycle and secure coding practices.
• Proficiency in Python programming and automation to enhance security processes.
• Strong knowledge of cloud security principles and application security frameworks.
• Expertise in identity and access management, including authentication protocols.
• Ability to design scalable, secure solutions aligned with organizational objectives.
• Familiarity with version control software to manage codebase effectively.
• Demonstrated capability to integrate security considerations throughout software development phases.

At Walmart, we offer competitive pay as well as performance-based bonus awards and other great benefits for a happier mind, body, and wallet. Health benefits include medical, vision and dental coverage. Financial benefits include 401(k), stock purchase and company-paid life insurance. Paid time off benefits include PTO (including sick leave), parental leave, family care leave, bereavement, jury duty, and voting. Other benefits include short-term and long-term disability, company discounts, Military Leave Pay, adoption and surrogacy expense reimbursement, and more. You will also receive PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes. The amount you receive depends on your job classification and length of employment. It will meet or exceed the requirements of paid sick leave laws, where applicable. For information about PTO, see https://one.walmart.com/notices. Live Better U is a Walmart-paid education benefit program for full-time and part-time associates in Walmart and Sam's Club facilities. Programs range from high school completion to bachelor's degrees, including English Language Learning and short-form certificates. Tuition, books, and fees are completely paid for by Walmart.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to a specific plan or program terms.
For information about benefits and eligibility, see One.Walmart.
The annual salary range for this position is $90,000.00 - $180,000.00 Additional compensation includes annual or quarterly performance bonuses. Additional compensation for certain positions may also include :
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Minimum Qualifications...

Outlined below are the required minimum qualifications for this position. If none are listed, there are no minimum qualifications.

Bachelor’s degree in Computer Science, Information Technology, or related field and 5 years' experience in information technology within the past
10 years OR 7 years' experience in information technology or related field within the past 10 years.Preferred Qualifications...

Outlined below are the optional preferred qualifications for this position. If none are listed, there are no preferred qualifications.

Certified Intrusion analyst (GCIAs), GIAC Certified Enterprise Defender (GCED), Certified Geographic Information Systems Professional (GISP), GIAC Certified Incident Handler (GCIH), Certified Information Systems Security Professional (CISSP), Certified Information Systems Auditor (CISA), GIAC Security Essentials Certification (GSEC), and/or Security+ certification, Leading Technical Team, Mainframe Technology, Professional certification in information technology relevant to the job under consideration (for example, Java, C/C++, mainframe technologies, SAP, Microsoft .Net, business intelligence tools, SQL technology), Programming language or languages (for example, Java, C/C++, .NET, Rexx, Cobol, Powershell), SAP, SQL technology, Version control software (for example, Subversion, Git, Librarian), We value candidates with a background in creating inclusive digital experiences, demonstrating knowledge in implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards, assistive technologies, and integrating digital accessibility seamlessly. The ideal candidate would have knowledge of accessibility best practices and join us as we continue to create accessible products and services following Walmart’s accessibility standards and guidelines for supporting an inclusive culture.Primary Location...805 Se Moberly Ln., Bentonville, AR 72712, United States of AmericaWalmart and its subsidiaries are committed to maintaining a drug-free workplace and has a no tolerance policy regarding the use of illegal drugs and alcohol on the job. This policy applies to all employees and aims to create a safe and productive work environment.