Cast AI
Senior Software Engineer – Karpenter
Cast AI
€78k - €108k
Europe (Remote)
GoLang
Kubernetes

Senior Software Engineer – Karpenter

Overview

Cast AI is the leading Application Performance Automation (APA) platform, enabling customers to cut cloud costs, improve performance, and boost productivity – automatically.

Job Description

The Karpenter team powers the integration between Karpenter and Cast AI, bringing enterprise capabilities to the most popular open source Kubernetes autoscaler. We enhance Karpenter with advanced features that improve application reliability and performance while optimizing costs.

Responsibilities

  • - Design, build, and operate backend services and Kubernetes operators in Go that manage clusters together with Karpenter.
  • - Participate in architecture and design decisions.
  • - Contribute to high‑volume data‑plane services (gRPC/REST) and asynchronous workflows.
  • - Shape public and internal APIs with an eye for simplicity and developer experience.
  • - Participate in design reviews, code reviews, on‑call rotations, and occasional customer deep‑dives.

Required Skills

  • - Strong software engineering skills with experience in distributed systems and backend development (ideally GoLang, but not a hard requirement as long as you’re willing to transition to it)
  • - Strong debugging, optimization, and performance-tuning skills
  • - Deep understanding of cloud platforms: hands-on experience with cloud platforms like AWS, Google Cloud Platform (GCP), Microsoft Azure, and tools such as Kubernetes for containerization and orchestration
  • - CI/CD and DevOps practices experience
  • - Strong English skills, both verbal and written
  • - Ability to work independently and collaboratively within a team
  • - Startup mindset: adaptable, proactive, and comfortable with ambiguity
  • - A proactive, problem-solving mindset with a “yes we can” attitude.

Benefits

  • - Competitive salary (€6,500 – €9,000 gross, depending on the level of experience)
  • - Enjoy a flexible, remote-first global environment.
  • - Collaborate with a global team of cloud experts and innovators, passionate about pushing the boundaries of Kubernetes technology.
  • - Equity options.
  • - Get quick feedback with a fast-paced workflow. Most feature projects are completed in 1 to 4 weeks.
  • - Spend 10% of your work time on personal projects or self-improvement.
  • - Learning budget for professional and personal development – including access to international conferences and courses that elevate your skills.
  • - Annual hackathon to spark new ideas and strengthen team bonds.
  • - Team-building budget and company events to connect with your colleagues.
  • - Equipment budget to ensure you have everything you need.
  • - Extra days off to help maintain a healthy work-life balance.

About the company

Cast AI is an autonomous Kubernetes platform that helps teams cut cloud costs, improve performance, and eliminate operational overhead by running Kubernetes on autopilot. Using intelligent agents that continuously optimize workloads, resource allocation, and scaling in real time, CAST AI automatically reduces waste, prevents downtime, and maximizes cluster efficiency—without manual tuning or tradeoffs between cost and reliability. Trusted by teams worldwide, CAST AI frees DevOps engineers from day-to-day infrastructure management so they can focus on shipping faster while spending less on cloud.


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