Senior Backend Engineer | Production Systems Handling Billions Of Dollars

Codi; Melbourne; Hybrid; AUD 160,000 - 200,000; Full time

Job summary

Codi in Melbourne is seeking a Senior/Staff Backend Engineer to own high-throughput back-end systems on a real-time platform. You’ll work in a hybrid, Melbourne-based setup with potential leadership across technical domains.

The role focuses on Node/NestJS, TypeScript, PostgreSQL, and cloud-enabled microservices. You’ll drive performance, mentor engineers, and shape system architecture for scale.

Qualifications

• Senior or Staff level TS/Node.js backend engineer with real-time systems experience.
• Strong focus on scalable microservices and event-driven architectures.
• Production PostgreSQL experience and performance tuning.

Responsibilities

• Build and own back-end microservices in Node/NestJS handling thousands of concurrent users.
• Lead performance optimisation on critical transaction paths and real-time data flows.
• Design for scale: distributed systems, event-driven architecture, high availability.
• Own a technical domain end to end, including quality and architecture decisions.
• Mentor junior and mid-level engineers and set the standard for back-end engineering practice.

Skills

TypeScript

Node.js

NestJS

PostgreSQL

AWS

CI/CD

Tools

PostgreSQL

AWS

CI/CD

Job description

Senior / Staff Backend Engineer

Melbourne (hybrid) · Senior to Staff · Full-time

A profitable, fast-growing iGaming startup processing over $2bn in transactions a month. They're looking for a Senior or Staff TypeScript engineer to own back-end systems on a real-time, high-throughput platform. High-stakes, performance production code where your decisions matter from day one.

The team is small, the bar is high. If you've been the person who actually understands the system under load, this is a next step.

What you'll do

• Build and own back-end microservices in Node/NestJS handling thousands of concurrent users
• Lead performance optimisation on critical transaction paths and real-time data flows
• Design for scale: distributed systems, event-driven architecture, high availability
• Own a technical domain end to end, including quality and architecture decisions
• Mentor junior and mid-level engineers and set the standard for back-end engineering practice

About you

• Senior or Staff-level TypeScript/Node.js engineer with a strong back-end focus
• Experience with high-transaction, real-time systems: fintech, gaming, trading, or similar
• Deep understanding of scalable architectures, microservices, and event-driven systems
• Production PostgreSQL experience: schema design, query optimisation, performance at scaleComfortable owning hard problems without a playbook - you set direction, not follow it

Nice to have

• Full-stack exposure (React/TypeScript front end)
• Security principles for financial or sensitive data handling
• iGaming, betting, or crypto/Web3 experience

Stack

TypeScript, Node.js, NestJS, PostgreSQL, AWS, CI/CD. React on the front end.

Comp

AUD $160k-$200k base + bonus for Senior; higher for Staff/Principal. Negotiable on experience.

Details

Melbourne-based. Hybrid, mix of in-office and remote. Australian working rights required.