API Platform Engineer, Context & Knowledge Graph

Joinhorizon; Mountain View (CA); Hybrid; USD 210,000 - 260,000; Full time

Benefits offered by this job

Home office stipend

Education stipend

Wellness stipend

Healthy lunches provided

Job summary

Glean is seeking a Software Engineer, APIs & Context Platform, to shape the horizontal AI platform powering how employees use AI at work. You will own REST API standards, design new endpoints, and build the API gateway layer, while collaborating across backend services, SDKs, and developer docs.

This role emphasizes developer experience and scalable API surfaces in a fast-moving startup environment. Based in Mountain View, this hybrid role requires 4 days in the office.

Qualifications

• BA/BS in computer science or related field, or equivalent practical experience.
• 5+ years of industry software engineering experience, with public APIs or developer platforms in production.
• Deep fluency in REST API design principles: versioning, backward compatibility, pagination, error semantics, hypermedia, and OpenAPI/JSON Schema.

Responsibilities

• Own and evolve Glean’s REST API standards: versioning strategy, backward-compatibility guarantees, deprecation policy, and OpenAPI tooling.
• Design and ship new API endpoints exposing platform primitives (search, knowledge graph, chat, agent) as stable developer surfaces.
• Build the API gateway layer: routing, authentication (OAuth2, API keys, OIDC), rate limiting, quota management, per-tenant usage metering.
• Define reusable platform primitives on top of horizontal layers (connectors, security/governance, memory, model orchestration) for internal and external use.
• Work across backend services, developer tools, SDKs, and documentation in a fast-growing startup.
• Design, build, and evolve SDKs and client libraries for integration with Glean and agent frameworks.
• Instrument API usage to surface adoption metrics, error patterns, and latency SLOs.
• Champion the external developer perspective and feed feedback into the roadmap.

Skills

REST API design

OpenAPI/JSON Schema

Golang

API development

Team collaboration

Education

Bachelor's degree in Computer Science

Job description

Glean is seeking a Software Engineer, APIs & Context Platform, to shape the horizontal AI platform powering how employees use AI at work. You will own REST API standards, design new endpoints, and build the API gateway layer, while collaborating across backend services, SDKs, and developer docs.

This role emphasizes developer experience and scalable API surfaces in a fast-moving startup environment. Based in Mountain View, this hybrid role requires 4 days in the office.