Principal Software Engineer-SRE

Our world is transforming, and PTC is leading the way. Our software brings the physical and digital worlds together, enabling companies to improve operations, create better products, and empower people in all aspects of their business.

Our people make all the difference in our success. Today, we are a global team of nearly 7,000 and our main objective is to create opportunities for our team members to explore, learn, and grow — all while seeing their ideas come to life and celebrating the differences that make us who we are and the work we do possible.

Onshape's Site Reliability Engineering team is looking for a Principal Software Engineer to play a critical role in ensuring the long‑term reliability, scalability, and operational excellence of our platform.

As a Principal Software Engineer, you will operate with a high degree of autonomy and influence. You will lead complex, cross‑organization reliability initiatives, shape reliability strategy, and serve as a technical authority and trusted advisor across engineering.

Your work will directly shape the experience of our customers by ensuring the platform is fast, resilient, and dependable. As a Principal Software Engineer, you will help protect customer trust by driving reliability across the entire system lifecycle.

This role is ideal for engineers who enjoy solving ambiguous, high‑impact problems at scale, influencing system design across teams, and raising the reliability bar for an entire organization.

• Lead design, implementation, and evolution of reliability, availability, and resiliency strategies for large‑scale distributed systems written primarily in Java
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• Apply deep experience operating complex, distributed systems to guide architectural decisions, reliability strategies, and long‑term system evolution.

• Identify systemic risks in application architecture, data flows, and infrastructure, and drive architectural improvements that measurably improve availability, performance, and scalability.

• Set and evolve reliability standards, best practices, and operational principles across R&D.

• Lead efforts to prevent, detect, and mitigate incidents through technical improvements and operational maturity.

• Serve as a senior coordination point during major incidents, helping manage response and guide long‑term remediation.

• Champion blameless post‑incident reviews and ensure learnings translate into durable system improvements.

• Apply advanced software engineering practices to eliminate manual work, reduce operational load, and improve system observability.

• Design and build internal platforms, automation, and tooling that support Java based services and their operational needs.

• Partner deeply with product engineers, architects, and engineering leadership to ensure reliability and operability are first‑class concerns in system design.

• Review and influence designs for complex systems involving technologies such as data stores, messaging systems, and coordination services.

• Serve as a technical mentor and coach for SREs and other engineers, raising overall engineering and operational maturity.

• Contribute to longer‑term reliability and infrastructure strategy aligned with business growth.

• Stay current with industry trends in SRE, distributed systems, and the Java ecosystem, turning insights into practical improvements.

• Help define what “great reliability” looks like for the organization and how we measure it.

• US Citizenship or Permanent Residents only due to ITAR requirements.

• Ability to work east coast (EST) hours and be available for on‑call rotation once every 10 weeks.

• 10+ years of experience in software engineering, site reliability engineering, or systems engineering roles.

• Extremely strong proficiency with the Java programming language and its ecosystem, including building, debugging, and operating production Java services.

• Deep experience operating complex, distributed systems in production environments.

• Strong software engineering…