Go Backend Engineer - API Platform & Gateway

Openkrill; United States; Hybrid; USD 149,000 - 190,000; Full time

Benefits offered by this job

Inclusive Team

Growth Opportunities

Innovative Culture

Hybrid & Remote Work

Competitive Compensation

Job summary

Horizon3 is a remote cybersecurity company delivering NodeZero platform capabilities. We build the internal API layer and gateway that power customer interfaces, focusing on reliability, observability, and scalable service mesh across environments.

The API Platform team ships with a P5 tech lead and P4 senior engineer, drives API consolidation, versioning, rate limiting, and observability, reporting to the API Platform Engineering Manager.

Qualifications

• 2+ years of professional software engineering experience building production backend services.
• Proficiency in Go or strong motivation to ramp quickly — Go is the primary language on this team.
• Solid understanding of REST API design principles and HTTP semantics; experience with gRPC is a plus.
• Ability to reason about service reliability: latency, error rates, retry behavior, and circuit breaking.

Responsibilities

• Implement and maintain API endpoints, middleware, and platform services in Go
• Build and evolve the API gateway layer — routing, authentication, rate limiting, and request/response shaping
• Write and maintain API contracts (OpenAPI/gRPC definitions) and communicate breaking changes to internal consumers
• Contribute to service reliability: monitoring, alerting, SLA tracking, and incident response for platform APIs
• Write clear, reviewable code with tests that cover both the happy path and failure modes
• Collaborate with Data Ingestion, Integrations Platform, and Client Platform teams who consume the APIs you build

Job description

Horizon3 is a remote cybersecurity company delivering NodeZero platform capabilities. We build the internal API layer and gateway that power customer interfaces, focusing on reliability, observability, and scalable service mesh across environments.

The API Platform team ships with a P5 tech lead and P4 senior engineer, drives API consolidation, versioning, rate limiting, and observability, reporting to the API Platform Engineering Manager.