Mid-Senior Harness Engineer, Python, TypeScript
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Job Description
AI engineer building core infrastructure for an AI coworking platform integrated with business tools. Collaborating with founders to optimize and ship integrations and runtime systems.
Responsibilities:
- Build Agent Runtime Systems; Develop and improve agent runtimes
- Design tool orchestration frameworks
- Build memory and context management systems
- Implement verification loops and agent self-checking mechanisms
- Improve reliability and execution accuracy
- Ship Integrations; Build integrations with business platforms and APIs
- Implement OAuth, webhooks, schema mapping, and data synchronization
- Create reliable workflows that operate on real customer data
- Support integrations across platforms such as: Salesforce, HubSpot, Stripe, Shopify, QuickBooks, Notion, Microsoft Teams, Slack
- Manage containerized workloads
- Improve scalability and system reliability
- Optimize infrastructure performance and operational costs
- Support high-volume production workloads
- Ship user-facing features directly into production
- Work across backend, frontend, integrations, and deployment systems
- Collaborate directly with founders and product stakeholders
- Own technical surfaces end-to-end
Requirements:
- Experience building or significantly modifying AI agents
- Strong Python development skills
- Strong TypeScript development skills
- Experience with agent architectures and orchestration systems
- Experience shipping production software rapidly
- Strong systems thinking and architectural decision-making abilities
- Experience working with APIs, integrations, and distributed systems
- Strong understanding of AI-assisted development workflows
Benefits:
- Competitive compensation package
- Meaningful early-stage equity
- Direct collaboration with founders
- High ownership and autonomy
- Opportunity to build core AI technology used by real customers
- Fast product feedback cycles
- Remote-first work environment within Poland
- Exposure to cutting-edge AI systems and infrastructure
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