> Markdown version of [/jobs/ext/4600477-principal-software-engineer](https://www.wearedevelopers.com/jobs/ext/4600477-principal-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer - **Company:** Cigna - **Location:** Paterson, NJ, United States - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** Application Performance Management, Continuous Integration, Software Debugging, RabbitMQ, Ruby on Rails, Kotlin, Low Latency - **Published:** November 6, 2026 - **Apply:** https://www.juju.com/job/28_25303_c8a01b41981856de498f9e9fbe090b61 ## About the Role * Written communication clear enough to survive a forwarded email chain * 9+ years building trust the slow, unglamorous way * The grit to debug at 4pm on a Friday without complaint * Ability to learn new technology systems quickly and apply them effectively * 8 years that taught you which corners can be cut * A Cigna mindset: scrappy today, scalable tomorrow * A Paterson network, or the hustle to build one from scratch ## Description * Optimize application performance, latency, and resource utilization at scale * Maintain and improve CI/CD infrastructure across NJ engineering teams * Mentor the principal cohort through their first real Ruby on Rails on-call at Cigna * Enhance test automation frameworks to increase release confidence * Carry features from whiteboard sketch to Paterson, NJ production without dropping the baton * Read the RabbitMQ stack traces others skim past, and trace bugs to their root * Translate fuzzy product wishes from Cigna stakeholders into shippable Kotlin services