About the Company:

Cast AI is an automation platform for cloud-native and AI infrastructure at scale. We embed autonomous decision-making into Kubernetes and cloud environments to continuously optimize performance, reliability, and efficiency. Having achieved unicorn status in January 2026 with a valuation exceeding $1 billion, over 2,100 companies rely on Cast AI, including Akamai, BMW, Cisco, FICO, HuggingFace, NielsenIQ, Swisscom, and TGS. We have operations across 34 countries spanning Europe, North America, Latin America, and APAC. Our headquarters is in Miami with a global, distributed team.

Salary Range:

€6,500 – €9,000 gross monthly (based on experience level)

Job Type:

Remote

Employment Type:

Full-time

Job Description:

Senior Software Engineer – Karpenter. Integrate Karpenter with the Cast AI platform and enhance the open-source Kubernetes autoscaler with enterprise capabilities.

Responsibilities:

• Design, build, and operate backend services and Kubernetes operators in Go
• Manage clusters alongside Karpenter
• Participate in architecture and design decisions
• Contribute to high-volume data-plane services using gRPC/REST protocols
• Develop asynchronous workflows
• Shape public and internal APIs, prioritizing simplicity and developer experience
• Participate in design reviews, code reviews, and on-call rotations
• Conduct occasional customer deep-dive sessions

Position Requirements:

Must have:

• Strong software engineering background with distributed systems and backend development experience
• Go language proficiency (or willingness to transition to Go)
• Advanced debugging, optimization, and performance-tuning capabilities
• Deep cloud platform knowledge: hands-on experience with AWS, GCP, or Microsoft Azure
• Kubernetes expertise for containerization and orchestration
• CI/CD and DevOps practices experience
• Fluent English (verbal and written)
• Independent and collaborative work capability
• Startup mindset: adaptable, proactive, and comfortable with ambiguity

Nice to have:

• Contributions to the Kubernetes or cloud-native open-source ecosystem
• Prior Karpenter experience

Working Conditions:

• Remote-first (Bulgaria, Greece, Lithuania, Poland, Romania)
• Fast-paced workflow: features typically completed in 1-4 weeks
• Global collaboration with cloud infrastructure experts

Benefits:

• Equity options
• 10% time allocation for personal projects and professional development
• Professional development learning budget (includes conference access)
• Extra days off for work-life balance
• Equipment budget for necessary tools
• Annual company hackathon
• Team-building budget and company events