Platform

Backend Developer Intern

Work on the Sylica API gateway, routing, billing, and observability in TypeScript on Node and Cloudflare.

Location: Remote (US) · New Mexico HQ optional
Time: 10–20 hrs / week, flexible with school
Compensation: Competitive intern stipend; school credit if applicable

You will help ship the core multi-provider LLM gateway: OpenAI-compatible APIs, org-scoped keys, credit metering, and streaming reliability. The stack is a modern monorepo (TypeScript, Turbo, Hono, Drizzle, Vitest) with a bias toward small, testable code paths and production-grade error handling.

What you will do

Implement and refine gateway routes, middleware, and provider adapters behind clear interfaces.
Improve observability: structured logging, request tracing hooks, and safe metrics that help on-call without leaking customer data.
Participate in code review; write and maintain tests (unit + focused integration) for critical paths.
Debug production-adjacent issues: malformed requests, retry semantics, and edge cases in streaming/SSE clients.

What we look for

Solid programming fundamentals (data structures, async I/O) and eagerness to read unfamiliar code carefully.
Some experience with TypeScript or JavaScript and HTTP APIs (REST, fetch, or similar).
Familiarity with git and GitHub; comfortable working in a terminal and reading stack traces.
Enrolled in or recently completed a CS, CE, or related program (or strong self-taught portfolio).

Nice to have

Prior exposure to PostgreSQL, Redis, or message queues.
Interest in LLMs and OpenAPI/OpenAI client compatibility.
Experience with Cloudflare Workers, Docker, or CI (GitHub Actions).

How we work

You will work directly with the platform team in a high-trust, low-ego environment. We default to short PRs, written context in tickets, and async-friendly communication. We care about correctness, security, and developer experience in equal measure.

Apply

No cover letter required as a separate file—use the long text field below. We read every application from real humans; expect a week or so during busy school months.