Principal Software Engineer, Platform Engineering

Role Overview

Join Moderna as a Principal Software Engineer, Platform Engineering, where you will define, build, and evolve reusable platform capabilities that enable application teams to develop, deploy, and operate software safely and effectively. This senior individual‑contributor role blends deep technical execution with cross‑functional leadership across developers, cybersecurity, architecture, AI platform, and other teams to create scalable, secure, and user‑focused tools and standards.

• Design and build secure platform capabilities using Python, Type Script, Git Hub Actions, Pulumi, Docker, AWS, and relevant internal or vendor APIs.
• Lead the design and evolution of AI runtime safety and AI gateway patterns, including policy enforcement, access controls, telemetry, auditability, and operational controls.
• Build and guide implementation of governed AI‑assisted development workflows by packaging approved tools, creating reusable integration patterns, improving developer experience, and embedding security and compliance expectations into paved‑road delivery workflows.
• Partner with cybersecurity, architecture, AI platform teams, and engineering leaders to align on platform standards, adoption strategy, risk posture, and implementation tradeoffs.
• Create and drive adoption of templates, reference implementations, documentation, examples, and paved‑road patterns that help application teams adopt secure development and AI‑assisted workflows.
• Improve developer experience by identifying systemic friction, reducing setup time, eliminating manual toil, standardizing common workflows, and making secure patterns easy to adopt.
• Establish and mature operational practices for owned capabilities, including monitoring, alerting, dashboards, runbooks, support models, service ownership, and lifecycle management.
• Identify recurring developer pain points and influence the roadmap by proposing improvements to shared frameworks, templates, platform tooling, and paved paths.
• Lead integration of secure software delivery controls into development workflows, including CI/CD guardrails, policy checks, artifact controls, and developer remediation patterns.
• Contribute hands‑on across Builder Tools & Platforms priorities as team needs evolve, including developer tooling, platform automation, secure delivery patterns, internal frameworks, and operational support.
• Mentor and coach engineers, raise engineering standards, review designs and implementations, and help teams make durable technical decisions across platform and application boundaries.

• Ten or more years of experience in software engineering, platform engineering, Dev Ops, infrastructure automation, secure software delivery, or a related role.
• Deep experience designing, implementing, and operating developer platforms, internal tools, infrastructure automation, CI/CD systems, or secure software delivery platforms.
• Very strong programming skills in Python or Type Script/JavaScript.
• Significant experience with Git Hub, Git Hub Actions, CI/CD workflows, and modern software delivery practices.
• Significant experience with AWS or another cloud provider for deploying and managing applications or platform services.
• Experience with Docker and containerized applications.
• Strong understanding of secure software development practices, software supply chain, dependency management, vulnerability scanning, artifact management, secrets handling, identity, authorization, and policy enforcement.
• Proven ability to set technical direction and design systems that balance security, standardization, usability, reliability, and developer productivity.
• Proven experience leading technical initiatives with cross‑functional stakeholders.
• Demonstrated ability to mentor engineers, raise technical standards, and guide teams through architecture, design, implementation, and operational tradeoffs.
• Expert troubleshooting skills across application code, build pipelines, cloud infrastructure, networking, identity, developer tooling, and third‑party platforms.
• Demonstrated ability to adapt to changing team priorities, operate effectively in ambiguous problem spaces, and contribute…