Principal Software Engineer Jobs in Missouri

This role requires the ability to work lawfully in the U.S. without employment-based immigration sponsorship, now or in the future.

• Lead the architectural modernization of enterprise-scale .NET applications into cloud-native, microservices-based platforms.
• Establish technical strategy and engineering standards for cloud adoption, application modernization, and software quality.
• Drive digital transformation initiatives supporting customer service operations, call centers, and enterprise back-office teams.
• Design scalable, secure, highly available distributed systems leveraging AWS, Google Cloud Platform (GCP), and modern cloud services.
• Champion DevSecOps, CI/CD automation, infrastructure as code, and engineering best practices across development teams.
• Guide teams in adopting modern front-end technologies and API-first architectures.
• Lead design reviews, architecture governance, and technical decision-making across multiple product teams.
• Evaluate and implement AI-assisted software development tools to improve engineering productivity and code quality.
• Mentor senior engineers while fostering a culture of technical excellence, innovation, collaboration, and continuous learning.
• Partner with business leaders to align technology investments with strategic organizational objectives.

• Bachelor’s degree or equivalent experience

• 8+ years of software engineering experience
• 4-5 years experience with source control tools such as GitLab or GitHub
• 2-3 years cloud infrastructure management and architecture experience
• 2-3 years experience with Helm and other Kubernetes management tools

• Expert-level proficiency in C#, ASP.NET, .NET Core/.NET 8+, and object-oriented design principles
• Experience building and deploying microservices using containerized architectures
• Experience with Google Cloud Platform services including Cloud Run, GKE, Cloud Functions, Pub/Sub, Cloud SQL, and related services
• Strong experience with Git-based source control platforms including GitHub, GitLab, Azure DevOps Repos, or Bitbucket and CI/CD Pipelines
• Strong front-end development experience using ReactJS, TypeScript, JavaScript (ES6+), HTML5, CSS3, and responsive design frameworks.
• Experience integrating front-end applications with REST APIs and modern authentication mechanisms.
• Knowledge of authentication and authorization technologies including OAuth2, OpenID Connect, SAML, JWT, and Single Sign-On.
• Experience with relational and NoSQL databases including SQL Server, PostgreSQL, MongoDB, or DynamoDB.
• Strong understanding of application performance optimization, observability, logging, monitoring, and resiliency patterns.
• Experience implementing secure software development lifecycle (SSDLC) practices including static code analysis, vulnerability remediation, and secure coding standards.
• Experience using AI-assisted development tools such as Kiro, Claude, GitHub Copilot, Amazon Q Developer, or similar technologies to improve engineering productivity and software quality.
• Ability to make technical decisions and take ownership of software projects
• Adherence to best practices for code development, version control, continuous integration and automation
• Exceptional leadership and mentoring skills with experience influencing engineers across multiple teams.
• Ability to communicate complex technical concepts to both technical and non-technical stakeholders.

• Experience leading enterprise application modernization programs within large, complex organizations.
• Telecommunications, communications, or customer care platform experience.
• Experience supporting high-volume call center applications and workforce management solutions.
• Experience with workflow automation platforms and robotic process automation technologies such as UiPath, Microsoft Power Automate, Automation Anywhere, or similar platforms.
• Experience implementing event streaming solutions using Kafka, RabbitMQ, or cloud-native messaging services.
• Experience implementing observability platforms including Splunk, Datadog, Grafana, Prometheus, OpenTelemetry, or Elastic Stack.
• Cloud certifications such as AWS Certified Solutions Architect, AWS Professional certifications, Google Professional Cloud Architect, or equivalent

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A qualified applicant’s criminal history, if any, will be considered in a manner consistent with applicable laws, including local ordinances.

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