
Senior Software Engineer β Harness Team
Posted 6 days ago

Posted 6 days ago
This is a fully remote position, open to applicants in Bulgaria.
β’ Design, plan, and evaluate pipelines utilizing various models for planning, execution, and assessment.
β’ Oversee agent memory and context, ensuring state persistence across sessions, context compaction, and tool-call offloading.
β’ Manage the harness interface, which encompasses TUI, MCP integrations, and telemetry.
β’ Collaborate directly with users and team members to identify, comprehend, and resolve challenges.
β’ Take full ownership of features from start to finish: design, implementation, testing, and deployment.
β’ Work closely with product and engineering teams on intricate issues.
β’ Strong preference for production experience with Go or TypeScript; candidates lacking either should exhibit robust systems programming skills in a similar language.
β’ Proficient in debugging, optimization, and performance enhancement, including query profiling, index design, and database performance tuning beyond ORM usage.
β’ Practical experience with AWS, GCP, or Azure and Kubernetes is highly advantageous.
β’ Familiarity with observability tools such as Prometheus, Grafana, and OpenTelemetry.
β’ Background in CI/CD and DevOps methodologies.
β’ Adaptable, proactive, and comfortable navigating ambiguity.
β’ Strong verbal and written English communication skills.
β’ Proven ability to drive a complex project from inception to completion.
β’ Experience with harnesses and developing AI workflows is a significant advantage.
β’ May require a background check at the final phase of the hiring process.
β’ Must not need visa sponsorship or a work permit from Cast AI.
β’ Equity options.
β’ Flexible, remote-first global work environment.
β’ 10% of work hours allocated for personal projects or self-improvement.
β’ Learning budget for both professional and personal development, including attendance at international conferences and courses.
β’ Annual hackathon.
β’ Team-building budget and company events.
β’ Equipment budget.
β’ Additional days off.
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