# Platform Engineer, APIs & Observability

**Company:** [StackAI](https://hotfix.jobs/companies/stackai)
**Location:** San Francisco, CA, New York, NY
**Role:** Backend Engineering
**Salary:** $171k – $190k/yr
**Experience:** 4+ years
**Skills:** Python, FastAPI, TypeScript, Node.js, REST APIs, openapi, OpenTelemetry, distributed tracing, ClickHouse, druid
**Posted:** 2026-06-19

> Platform Engineer owning StackAI's public APIs, SDKs, observability, tracing, analytics, and audit logging for AI agent workflows. Requires 4+ years building production backend services and APIs, with strong Python/FastAPI and observability experience.

## Job Description

## Responsibilities
- Help build the public API as a product. Design, version, and evolve the API and SDKs that StackAI customers build on, and keep the developer experience first-class.
- Set our API standards. Help define the conventions, versioning and deprecation policy, and review bar that keep every API across the platform consistent and predictable.
- Make agent runs observable. Build tracing and instrumentation that let anyone follow a single agent run end to end, across its models, tools, and sub-agents.
- Turn usage into analytics customers act on. Build the reporting that shows customers how their agents perform, what they cost, and where to improve.
- Own the audit trail. Build the audit logging and team-scoped views enterprises rely on.

## Requirements
- 4+ years building backend services and public APIs in production.
- Strong API craft: RESTful design, SDK ergonomics, and rate limiting.
- Experience defining API standards and governance: versioning, deprecation, and consistency across services.
- Fluency with observability and analytics: distributed tracing, metrics, and turning raw signals into data products people rely on.
- Strong in Python and modern backend frameworks (FastAPI or similar), comfortable across TypeScript/Node.js on the product surfaces.

## Nice-to-Haves
- OpenTelemetry or distributed tracing at scale.
- Analytics datastores (ClickHouse, Druid, or similar).
- Designing developer-facing SDKs used by external customers.
- AI or LLM platform experience: token and cost accounting, agent-run tracing.
- Startup or growth-stage experience.

## Similar roles

- [Software Engineer - Compiler](https://hotfix.jobs/jobs/166b9a9f-21ca-4e73-aa9b-58d710d90607) - Sigma - San Francisco, CA - $170k – $235k/yr
- [Backend Software Engineer](https://hotfix.jobs/jobs/af64e54c-a92b-40ec-8544-49275153e820) - Seeq - Remote - $170k – $205k/yr
- [Back End Engineer (All Levels)](https://hotfix.jobs/jobs/d6a9f5e6-e85d-4d23-848f-76497d519ad4) - Bilt Rewards - New York, NY - $170k – $300k/yr
- [Backend Engineer - Card Transaction Processing](https://hotfix.jobs/jobs/48ce888c-8113-4891-ba5a-f1ae1a4eca8a) - Ether.Fi - New York, NY - $170k – $200k/yr
- [Backend Software Engineer](https://hotfix.jobs/jobs/be4c8589-4bbc-4ca1-8b76-7e5be5c16877) - Tennr - New York, NY - $170k – $190k/yr

**Apply:** https://hotfix.jobs/jobs/330f53b7-64b6-4fd5-8049-a46a7229cc17
**Canonical:** https://hotfix.jobs/jobs/330f53b7-64b6-4fd5-8049-a46a7229cc17