Senior Software Engineer, CAST AI
Runtime Sensor
€9,000 per month
More information about location
Kubernetes automation platform
Open for applications
Kubernetes automation platform
201-500 employees
Open for applications
€9,000 per month
More information about location
201-500 employees
Company mission
To pioneer a brighter future of cloud computing.
Role
Who you are
- You have to be physically in any of the European countries GMT 0 to GMT +3
- Strong software engineering skills
- Strong experience with Linux Containers
- Experience with distributed systems
- CI and git knowledge
- Strong analytical, problem-solving, and troubleshooting skills
- Strong verbal and written communication skills
- Ability to work independently or with a group
- A “yes we can” attitude
What the job involves
- The goal of the Runtime Security Team is to develop part of a Kubernetes Security Posture Management (KSPM) product that acts as a last line of defense for our customers, detecting any malicious activity going on in our customers' Kubernetes clusters, notifying the customer, and also blocking this activity
- While most other parts of the Cast AI KSPM product look for potential threats based on current configuration, runtime security analyzes what is actually happening in the cluster to surface malicious activity
- The Runtime Security Team is responsible for their part of the product end-to-end, including developing an agent that audits Kubernetes workloads using eBPF on the Linux kernel layer, designing and implementing new detections for malicious activity, collecting and processing vast amounts of data from the customers clusters to enable these detections, and surfacing the most valuable insights from all of this collected data
- We’re looking for a *Senior Software Engineer* to help build the runtime component behind our Kubernetes Security product
- You’ll work deep in the guts of Linux, tracing live application execution using eBPF, and turning low-level signals into high-impact insights and threat detections by building a high-scale backend in Go that runs on Kubernetes and ingests millions of events collected from this tracing
- In this role, you will own the full pipeline: from the eBPF-based agent that monitors runtime behavior, to the backend systems that process and aggregate data at scale, to the detection logic that flags malicious activity
- The team is solving tough problems: figuring out how to reliably trace key aspects of application behavior through the Linux kernel in ways that are hard to evade, processing massive event volumes on the order of millions of events per second, without missing anything (a missed event could mean a missed detection), and carefully balancing what’s done in the agent vs the backend to optimize performance, cost, detection accuracy and flexibility
- As a Senior Software Engineer, you will work in a highly skilled team and collaborate throughout the full development lifecycle
- Participate in creating ideas for the product, gathering requirements, and solving customer needs
- Design and architect software, leveraging your experience to ensure scalability, maintainability and performance
- Write clean, maintainable and documented code using best practices and coding standards
- Ensure software reliability through test coverage and local testing
- Respond to incidents to resolve customer issues or service disruptions
- Here are some of the tools we use daily:
- Go is our main language
- EBPF for tracing workload execution
- ClickHouse and PostgreSQL for persistence
- GCP Pub/Sub for messaging
- GRPC for internal communication
- REST for public APIs
- Kubernetes, which our product is evolving around
- AWS, GCP, and Azure cloud providers, which are currently supported in our platform
- We use GitLab CI with ArgoCD as our GitOps CD engine
- Prometheus, Grafana, Loki, and Tempo for observability
- Not every candidate knows every tool - our stack evolves, and we care more about your ability to learn
Application process
- We usually respond within a day
Our take
Managing cloud deployments effectively to control costs has become a priority for organizations of all sizes. CAST AI drives cloud optimization and cost reduction by using AI and machine learning to analyze a company’s cloud environment to identify the resources required for maximum performance.
CAST AI’s platform supports all three major cloud service providers; Microsoft Azure, Google Cloud, and Amazon Web Services. When cloud providers have unused machines they are typically discounted by 60-70%, however, if AWS (for example) needs that machine back, they give little warning before reclaiming it. CAST AI is able to automatically detect this, and immediately replace it, meaning companies using its platform will never experience an outage of discounted machines.
As more enterprises embrace cloud technologies, CAST AI is a strong choice of provider as it provides customers with a unified, automated platform, making Infrastructure as a Service (IaaS) more efficient and budget-friendly. The company has seen considerable investment that will be spent on attracting new customers, as well as helping to expand the CAST AI range of products.
Steph
Company Specialist at Welcome to the Jungle
Insights
51% employee growth in 12 months
Company
Funding (last 2 of 5 rounds)
Apr 2025
$108m
SERIES C
Nov 2023
$35m
SERIES B
Total funding: $180.7m
Company HQ
Downtown Miami, Miami, FL
Leadership
Yuri Frayman
(Co-Founder & CEO)Co-founder & former CEO of ZENEDGE, Frayman Group, Viewdle, and LegalKEY Technologies. Founder & former Executive Chairman of CUJO AI. Current Director of Blumarine Group, and is a Board Member/Advisor at Koop Technologies, Secerus, and Perthera AI.
Leon Kuperman
(Co-Founder & CTO)Co-founder & former CTO of ZENEDGE, Co-founder of HostenPCI, and Founder & previous CTO of Truition. Previous CTO & Technology Advisor at CUJO AI, Vice President of Security Products OCI at Oracle, and was the President & CTO of Bidz.com. Current Board Member for OXYGEN.
Laurent Gil
(Co-Founder & President)Co-founder & former CPO of ZENEDGE. Previous CEO of Viewdle, CFO of WiPlug, and Director of IdeaCapital. Worked as a Group Architect at Oracle, and was an Advisor for both We Heart It and Cel-Fi.
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