Senior Software Engineer, Harness Team
New
C
CAST AIAI infrastructure
Location: Bulgaria; Croatia; Estonia; Greece; Hungary; Latvia; Lithuania; Poland; Romania; Slovakia; Slovenia; UkraineFull-TimeSenior
Salary€6,500 - €9,000 gross, depending on the level of experience
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Job Details
- Languages
- Strong English skills, both verbal and written.
- Required Skills
- AWSGCPKubernetesTypeScriptAzureGoGrafanaPrometheus
Requirements
- Have production experience with Go or TypeScript, or demonstrate strong systems programming skills in a comparable language.
- Bring strong debugging, optimization, and performance-tuning skills.
- Have experience with query profiling, index design, and database performance tuning beyond ORM usage.
- Have hands-on experience with AWS, GCP, or Azure and Kubernetes; these are strong pluses.
- Have experience with observability tooling such as Prometheus, Grafana, or OpenTelemetry, and with CI/CD and DevOps practices.
- Be adaptable, proactive, and comfortable with ambiguity.
- Have personally driven a complex project end-to-end.
- Have strong verbal and written English skills.
- Experience with harnesses and creating AI workflows is a strong plus.
Responsibilities
- Architect planner, executor, and 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 the TUI, MCP integrations, and telemetry.
- Work directly with users, including colleagues, to identify, understand, and fix pain points.
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