We're looking for a Backend Engineer to own core services and APIs end to end. You'll design, build, and run the systems that power social feeds, paper trading, live trading, and copy trading — from WebSockets and HTTP APIs to Kafka pipelines and Redis/Valkey caches. This is a hands-on role: you'll write production code, review PRs, debug incidents, and shape how we build for the long term.

Key responsibilities

Design, implement, and maintain backend APIs and background workers

Own services across social, paper trading, live trading, and copy trading

Write and review PostgreSQL queries — performance and correctness matter

Produce and consume Kafka events with solid retries and idempotency

Keep paper, live, and copy trading cleanly separated: balances, P&L;, and trader payouts

Build paper trading: simulated positions on live prices, including SL/TP and liquidation

Integrate live trading with a non-custodial perp DEX — immutable trade records (no edits, no deletes)

Review pull requests, debug production issues, and ship changes that are protected at scale

Partner with mobile and product engineers on clear, stable API contracts

About you





4+ years building backend services in production

Strong TypeScript/Node.js

Deep SQL and PostgreSQL — comfortable owning schema and query performance

Event-driven systems in anger (Kafka or similar)

HTTP API design and operation you'd be happy to put your name on

Ownership mindset: debugging, deployments, on-call — you don't disappear after merge

Ability to extend existing code without inventing a parallel pattern every time

About us

We're a US-based fintech startup — five years in, profitable, and entering a major Series A with institutional investors. Our product is social investing: traders build portfolios, share ideas, and earn when others follow their performance. We're top-three globally in our category, with a strong focus on crypto today and room to grow. The team is fully remote, spread across the US and Australia, with competitive cash compensation and meaningful stock options. You'll work with people who care about shipping reliable systems, not slide decks.

📌 Senior Backend Engineer (Sydney)
🏢 Elnakeeb
📍 Sydney