Backend Developer

Humello; Sydney; On-site; AUD 70,000 - 100,000; Full time

Job summary

Humello, a Sydney-based AI HR technology company, is hiring two Graduate Backend Developers to design, build and maintain backend services powering our product. You’ll work across APIs, databases, authentication, cloud infrastructure and data pipelines, with hands-on experience far beyond what a typical graduate program offers.

You’ll collaborate with a small, fast-moving team and directly with the founder and tech lead, gaining real production coding exposure from day one.

Qualifications

• Completed bachelor’s degree in CS/Software Engineering or related field.
• 0–2 years of professional experience.
• At least one completed internship in software/tech.
• Solid SQL skills and understanding of relational DB design.
• Strong problem-solving and attention to detail.
• Ownership mindset; test your work and don’t push and hope.
• Clear communicator who can explain technical work to engineers and non-technical people.
• Experience with NestJS, Node.js and TypeScript.
• Full working rights in Australia.

Responsibilities

• Build and maintain backend services and REST APIs using NestJS, Node.js and TypeScript.
• Design PostgreSQL database schemas and write efficient SQL queries using Sequelize ORM.
• Implement authentication and authorization (JWT) and follow API security best practices.
• Build and maintain integrations with client HRIS platforms, including API mapping, ETL processes and data synchronisation.
• Contribute to a microservices architecture and help make system design decisions.
• Write Python scripts to import, transform and validate client data.
• Containerise services with Docker and deploy to AWS through CI/CD pipelines.
• Identify and fix performance issues across APIs and databases.
• Use Git and GitHub for version control, pull requests and code reviews.
• Write clear technical documentation for the team.

Skills

SQL proficiency

NestJS

Node.js

TypeScript

Problem solving

Clear communication

Ownership

Relational DB design

Education

Bachelors in CS

Tools

Sequelize ORM

PostgreSQL

Docker

AWS

Git

Job description

We're hiring two Graduate Backend Developers to help design, build and maintain the backend services that power our AI product. You'll work across APIs, databases, authentication, cloud infrastructure and data pipelines, writing production code from day one. As part of a small, early-stage team, you'll work directly with our founder and tech lead and get hands‑on experience far beyond what a typical graduate program offers.

Key responsibilities

• Build and maintain backend services and REST APIs using NestJS, Node.js and TypeScript
• Design PostgreSQL database schemas and write efficient SQL queries, using Sequelize ORM
• Implement authentication and authorisation (including JWT) and follow API security best practices
• Build and maintain integrations with client HRIS platforms, including API mapping, ETL processes and data synchronisation
• Contribute to a microservices architecture and help make system design decisions
• Write Python scripts to import, transform and validate client data
• Containerise services with Docker and deploy to AWS through CI/CD pipelines
• Identify and fix performance issues across APIs and databases
• Use Git and GitHub for version control, pull requests and code reviews
• Write clear technical documentation for the team

About you

• Completed bachelor's degree in Computer Science, Software Engineering (Honours), Information Technology, Computer or Software Engineering, Science (Computer Science major), Advanced Computing / Computing or related field
• 0 to 2 years' professional experience
• At least one completed internship in a software engineering or technology role
• Solid SQL skills and an understanding of relational database design
• Strong problem‑solving skills and attention to detail
• A strong sense of ownership. You test your work and don't "push and hope"
• Clear communicator who can explain technical work to both engineers and non‑technical people
• Experience with, or strong exposure to, NestJS, Node.js and TypeScript
• Full working rights in Australia (Australian citizen, permanent resident, or a visa with unrestricted work rights)

About us

Humello is a Sydney‑based AI HR technology company helping organisations make better decisions about jobs, levelling and pay. We're a small, fast‑moving team building a product that clients rely on, and we're looking for graduate engineers to help us build it.