10 days ago
San Jose, CA, USASenior
Base Salary
$170k - $400k/yr
Responsibilities
- Design and build the integration layer connecting Hark’s agent to third-party services.
- Own authentication flows, API clients, schema normalization, action execution, error handling, and the full integration lifecycle.
- Define tool and action protocols that support safe, consistent, and extensible agent interactions.
- Integrate connectors into the agent runtime with fast, observable, and appropriately sandboxed execution.
- Collaborate with model researchers on tool schemas and action semantics for reliable model behavior.
- Instrument integrations, track failures, identify regressions, and improve reliability and correctness.
- Prioritize high-leverage integrations and drive the roadmap for expanding Hark’s capabilities.
Requirements
- Strong backend engineering fundamentals, including API design, OAuth flows, webhooks, rate limits, and reliable systems design.
- Experience building and shipping integrations with real external services at scale.
- Ability to design maintainable integration frameworks serving dozens of services.
- Understanding of tool use in LLM systems and how action schemas affect model behavior.
- Ability to work through ambiguity, iterate quickly, and learn from production systems.
- Strong communication and cross-functional collaboration skills.
- At least 5 years of relevant software engineering experience.
- Bonus experience with OAuth flows, webhook infrastructure, API gateway layers, REST, GraphQL, gRPC, MCP, LLM tool-use schemas, developer platforms, integration marketplaces, iPaaS systems, execution sandboxing, or permission-scoped action frameworks.
Benefits
- Full-time position.
Tech Stack
GraphQLgRPC
Categories
