Senior Software Engineer – Harness Team

🔥 14 minutes ago

🇧🇬 Bulgaria – Remote

💵 €6.5k - €9k / month

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 0%

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Cast AI

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2019

☁️ SaaS

🤖 Artificial Intelligence

🤝 B2B

SaaS • Artificial Intelligence • B2B

Cast AI is a SaaS platform that automates Kubernetes application performance, infrastructure, and cost optimization for cloud-native teams. It connects to EKS/AKS/GKE and on-prem clusters with no code changes, uses predictive models and runtime signals to rightsize pods, scale nodes, optimize GPUs and Spot instances, and run approved self-healing runbooks to maintain reliability and reduce cloud spend. Cast AI targets platform, SRE, and FinOps teams and supports AI/LLM workloads, GPU optimization, and real-time workload placement and cost intelligence.

📋 Description

• Architect planner/executor/evaluator pipelines using different models for planning, execution, and evaluation • Manage agent memory and context, including state persistence across sessions, context compaction, and tool-call offloading • Own the harness surface, including TUI, MCP integrations, and telemetry • Work directly with users and colleagues to identify, understand, and fix pain points • Own features end-to-end: design, implementation, testing, and production rollout • Collaborate directly with product and engineering teams on complex problems

🎯 Requirements

• Production experience with Go or TypeScript is strongly preferred; candidates without either should demonstrate strong systems programming skills in a comparable language • Strong debugging, optimization, and performance-tuning skills, including query profiling, index design, and database performance tuning beyond ORM usage • Hands-on experience with AWS, GCP, or Azure and Kubernetes is a strong plus • Experience with observability tooling such as Prometheus, Grafana, and OpenTelemetry • Experience with CI/CD and DevOps practices • Adaptable, proactive, and comfortable with ambiguity • Strong English skills, verbal and written • Personally driven a complex project end-to-end • Experience working with harnesses and creating AI workflows is a strong plus • May undergo a background check at the final stage of recruitment • Must not require visa sponsorship or a work permit from Cast AI

🏖️ Benefits

• Equity options • Flexible, remote-first global environment • 10% of work time for personal projects or self-improvement • Learning budget for professional and personal development, including international conferences and courses • Annual hackathon • Team-building budget and company events • Equipment budget • Extra days off

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