Senior Software Engineer – Platform Engineering

Cast AI

. Design, build, and operate CI/CD pipelines used by every engineering team .

Posted 11/4/2026full-timeRemote • BulgariaSenior💰 €6,500 - €9,000 per monthWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and operating CI/CD pipelines, observability tooling, and cloud infrastructure, with strong software engineering fundamentals and proficiency in Go or comparable systems programming languages. Capable of driving complex projects end-to-end while maintaining adaptability and strong debugging skills.

Highest-signal resume keywords

CI/CD Pipeline DevelopmentGo Programming LanguageKubernetes ManagementTerraform Infrastructure as CodeObservability Tooling

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software Engineering FundamentalsSystems ProgrammingDebugging SkillsPerformance TuningGitOps Systems

Soft Skills

AdaptabilityProactivityStrong English Communication

Tools & Technologies

GitLab CIArgo CDKargoHelmVictoriaMetricsGrafanaLokiTempoAWSGCP

Industry Keywords

Cloud InfrastructureContainer OrchestrationInfrastructure Friction EliminationLocal Development Environment ToolingOn-Call Rotation

Tech Stack

Tools & technologies

AWSAzureCloudGoogle Cloud PlatformGrafanaKubernetesTerraformGo

About the role

Key responsibilities & impact

Design, build, and operate CI/CD pipelines used by every engineering team
Build and maintain observability and monitoring tooling for production debugging
Build local development environment tooling that reproduces production-like conditions on engineers’ laptops
Identify and eliminate infrastructure friction for engineering teams at its root
Debug complex issues spanning CI/CD, observability tooling, Kubernetes, and cloud infrastructure
Contribute to the platform roadmap and backlog
Participate in the hiring process, including technical interviews and live coding

Requirements

What you’ll need

Strong software engineering fundamentals, including clean abstractions, maintainable code, and justified architecture choices
Production experience with Go strongly preferred; candidates without Go should demonstrate strong systems programming skills in a comparable language
Platform engineering experience building and operating CI/CD and GitOps systems, infrastructure as code, container orchestration, observability and monitoring tooling, and cloud platforms
Experience with GitLab CI, Argo CD, Kargo, Terraform, Kubernetes, Helm, VictoriaMetrics, Grafana, Loki, Tempo, AWS, GCP, or Azure
Experience with AI coding agents and agentic development workflows
Personally driven a complex project end-to-end
Strong debugging, optimization, and performance-tuning skills
Strong English skills, verbal and written
Adaptable, proactive, and comfortable with ambiguity
Participate in on-call rotation for teams that require it
Nice to have: Kubernetes operators, Helm chart authoring, admission webhooks
Nice to have: Internal developer platform design, golden paths, self-service tooling, service catalogs
Nice to have: Local development environment tooling such as devcontainers, Tilt, or Skaffold
Nice to have: Kubernetes or cloud-native OSS contributions
Must reside in Bulgaria, Croatia, Estonia, Greece, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia, Slovenia, or Ukraine
No visa sponsorship or work permit provided

Benefits

Comp & perks

Separate compensation for on-call participation (passive coverage and active interventions)
Flexible, remote-first global environment
Equity options
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
Company-covered travel costs for Vilnius onboarding