Senior Frontend Engineer

Title: Senior Frontend Engineer Location: Bulgaria; European Union; Hungary; Lithuania; Poland; Romania

Why Cast AI?

Cast AI is an automation platform that operates cloud-native and AI infrastructure at scale. By embedding autonomous decision-making directly into Kubernetes and cloud environments, Cast AI continuously optimizes performance, reliability, and efficiency in production.

The old way doesn't work. As Kubernetes and AI environments grow, manual decisions don’t. Cast AI replaces tickets, alerts, and manual tuning with continuous automation that adapts infrastructure as conditions change. Efficiency and cost savings follow naturally from that automation.

Over 2,100 companies already rely on Cast AI, including Akamai, BMW, Cisco, FICO, HuggingFace, NielsenIQ, Swisscom, and TGS.

Global team, diverse perspectives
We're headquartered in Miami, but our impact is international. We take a global and intentional approach to diversity. Today, Cast AI operates across 34 countries spanning Europe, North America, Latin America, and APAC, bringing a wide range of perspectives into how we build and lead.

Unicorn momentum
In January 2026, we achieved unicorn status with a strategic investment from Pacific Alliance Ventures, the corporate venture arm of Shinsegae Group (a $50+ billion Korean conglomerate). Our valuation now exceeds $1 billion, and we're just getting started.

Join us as we build the future of autonomous infrastructure.

About the role

At Cast AI, we work in a flat structure that encourages open communication and collaboration across all levels. Given our cross-team structure, you will be working with top-tier professionals and have the opportunity to shape different parts of our product.

We are looking for a person with common sense, learning agility, and personal drive who would be willing to expand their knowledge beyond frontend development and would be happy to become a full-stack engineer over time.

Requirements:

• Proficiency with AI-assisted engineering, know latest best practices and tools
• Experience with any JavaScript framework such as React, Angular, or Vue
• At least 5 years of production-grade application experience
• Strong understanding of front-end development and eagerness to transition to a full-stack role
• Proficiency in TypeScript and familiarity with a design system

Here are some of the tools we use daily:

• **Kimchi** (our in-house build harness), **Claude Code**
• **React.js** is our go-to library for developing interfaces
• **TypeScript** ensures that the application is type-safe
• **Material UI** and **Shadcn/ui**, to ensure visual consistency
• We use **Figma, Lovable, Claude Design** as our main tools for creating designs
• Our product revolves around **Kubernetes**
• Our platform currently supports **AWS**, **GCP**, and **Azure** as cloud providers
• We use **REST** for public APIs
• Our continuous deployment is powered by **GitLab CI** with **ArgoCD**, embracing GitOps practices
• For observability and application stability tracking, we rely on **Sentry** and **Grafana**.

Responsibilities:

• Manage a fast-growing codebase, ensuring it's flexible, testable, and performant
• Collaborate closely with the design, engineering, product, and sales teams to bring designs to life
• Contribute to the design process and actively participate in developing and maintaining our design system
• Provide and seek feedback from fellow engineers and cross-functional team members to foster continuous improvement.

What’s in it for you?

• 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.

Hiring process

• Screening call with Recruiter
• Hiring Manager interview
• Technical interview
• Live coding
• Culture Check interview with an executive

*As part of our standard hiring process, we would like to inform you that a background check may be conducted at the final stage of recruitment through our third-party provider, Checkr.
*Please note that Cast AI does not provide any form of visa sponsorship/work permit.