In-Demand Backend developer Jobs in Fairfield, Nsw

Full Stack Software Engineer - Agentic AI
NinjaTech AI —Sydney NSW
- $160,000 - $190,000 a year
- Full-time
- Computer Science
- AWS
- Bachelor's degree
- Health insurance
- Annual leave
DotNet Fullstack Developer
Tata Consultancy Services —Sydney NSW
- Azure
- Computer Science
- DevOps
Engineering Manager - Full Stack (React, Next.js, Node,)
Commonwealth Bank —Sydney NSW
- Full-time
- Azure
- AWS
- APIs
6d
Senior Software Engineer (.NET)
Corto Pty Ltd —Sydney NSW
- Full-time
- Hybrid work
- SQL
- AWS
- APIs
- Gym membership
Quick Apply
AI Backend Developer, Binance Square (Java, Golang, Python)
Binance —Sydney NSW
- Full-time
- Remote
- Azure
- Computer Science
- Engineering
Quick Apply
Staff Software Engineer . NET, Full Stack
Commonwealth Bank —Sydney NSW
- Full-time
- AWS
- APIs
- AI
AI-native software developer
Law of the Jungle —Sydney NSW
- Full-time
- Remote
- Master's degree
- AWS
- POS
- Work from home
Quick Apply
Senior Developer - Java / AWS / Microservices
Showtime Consulting —Sydney NSW
- Full-time
- AWS
- Analysis skills
- APIs
Quick Apply
6d
Backend Developers
Pyramid Global Technologies —Sydney NSW
- Management
- Engineering
- APIs
Full-Stack Engineer - Front-End Focused
The Argyle Network —Sydney NSW
- $140,000 a year
- Full-time
- AWS
- Communication skills
Java Platform Performance Engineer (Performance Optimization) Fully Remote
Binance —Sydney NSW
- Full-time
- Remote
- AI
Quick Apply
Staff Software Engineer, Engine & Tools - Unpublished R&D Product
Riot Games —Sydney NSW
- Full-time
- Computer science
- Computer Science
- Bachelor's degree
- Health insurance
- Annual leave
Quick Apply
Senior Engineer - Full Stack (React/.Net) - AI Workflows
Reapit ANZ —Sydney NSW
- Contract
- Azure
- DevOps
- Master's degree
Quick Apply
Quality Engineer
LEAP Legal Software —Sydney NSW
- Full-time
- Hybrid work
- SQL
- AWS
- AI
- Gym membership
- Free food
Quick Apply
Backend Developer
Pyramid Global Technologies —Sydney NSW
- APIs
Lead Software Developer
SITA Switzerland Sarl —North Sydney NSW
- Full-time
- Oracle
- Management
- Computer Science
- Work from home
- Employee assistance program
Senior Software Engineer
Propeller —Sydney NSW
- Hybrid work
- Parental leave
Quick Apply
Mobile Architecture
BMP Technologies —Sydney NSW
- $100,000.00 - $120,000.84 a year
- Full-time
- Azure
- APIs
- Agile
Quick Apply
12d
Quality Engineer
Corto Pty Ltd —Sydney NSW
- Hybrid work
- AWS
- APIs
- AI
- Gym membership
Quick Apply
4d
Senior Backend Engineer - Java - Product Platform
Canva —Sydney NSW
- Full-time
- Hybrid work
- AWS
- University
- APIs
- Parental leave
Quick Apply

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backend developer jobs near fairfield, nsw

Full Stack Software Engineer - Agentic AI

NinjaTech AI
Sydney NSW

Apply Now

Job Details

Full-time
$160,000 - $190,000 a year

Benefits

Stock options
Health insurance
Annual leave

Qualifications

CI/CD
Computer Science
AWS
Bachelor's degree
PostgreSQL
Software development
APIs
DynamoDB
AI

Full Job Description

Join NinjaTech AI as a Software Development Engineer: you will learn and use the latest tech to innovate, build and scale long-running AI agents, intelligent Apps and automations (B2B and B2C), powered by SuperNinja - our advanced agentic AI platform with full OS capabilities.

About the Company:

NinjaTech AI is a generative AI startup with headquarters in Silicon Valley and a subsidiary in Sydney. NinjaTech AI is backed by Alexa Fund and Samsung Ventures and we are on track to raise Series A funding in 2026.

You will contribute to building an agentic AI platform featuring autonomous long-running AI agents, each on dedicated computers with browser, code editor, terminal, and tool integrations. Our AI Agents handle tasks like browsing, coding, workflow automation, data analysis, reporting, building AI-native apps, competitive intelligence, and content production.

About the Role:

The Software Engineer is a full-time position, based at our Sydney office (5 days on-site; fantastic office space, free daily meals). Our team works in a fast-paced and collaborative environment. We get a lot done when we ideate together and iterate quickly.

The Software Engineer will design, develop, integrate and deploy various AI technologies within NinjaTech’s Agentic AI product. You will report to the VP of Engineering (ex-AWS, onsite in Sydney) and will collaborate daily with the Chief Science and Technology Officer/Co-founder (ex-AWS, Sydney) and Founder/CEO (ex-Google, HQ), as well as our strong team of Software Engineers and Applied Scientists, PM, UX, and QA.

What you will do:

As a key member of our engineering team, the Software Developer will be responsible for translating our vision and customer needs into functional and appealing interactive applications, ensuring a great user experience.

Build features (end-to-end) for our web app (super.myninja.ai)
Bring expertise in performance and optimization to improve our applications for smooth and fast user experience.
Develop and maintain documentation for the platform, including API documentation.
Write clean, efficient, and well-documented code in React, Next.js, Python and ensure code quality through automated testing and continuous integration and deployment.
Participate in code reviews and provide constructive feedback to other members of the team.
Troubleshoot and debug issues that arise in the platform, and implement solutions to prevent recurrence.
Collaborate with product management to define and prioritize product requirements, ensuring technical feasibility and alignment with company goals and user requests.
Leverage RESTful APIs and web sockets for fast communication with our backend systems.
Unit-test code for robustness, including edge cases, usability, and general reliability.
Continuously discover, evaluate, and implement new technologies to maximize development efficiency.

Required Experience:

1+ year(s) of experience in software development, with a focus on building scalable and reliable web applications.
Generalist mindset: you're comfortable working across frontend, backend, and infra. You see every layer as an exciting opportunity to make an impact.
Professional experience in at least one of: Python, React, Node.js, or Next.js and curiosity to learn the rest
Familiarity with cloud platforms (AWS strongly preferred) and databases (Supabase, PostgreSQL, DynamoDB, Firebase, etc.)
Systematic thinker: you design before you code and you care about how things are built, not just that they work
Ownership mentality: you take problems from start to finish without needing to be told what's next
Strong problem-solving skills and ability to work in a team environment.
Bachelor's degree in Computer Science or relevant field preferred.

Nice to Have:

Startup experience: you've shipped in fast-moving, ambiguous environments
End-to-end projects you've built yourself (side projects, open source, hackathons)
Experience with TypeScript, WebSockets, CI/CD pipelines, or service-oriented architectures
Interest in AI/ML and how large language models work

Benefits:

NinjaTech AI offers excellent benefits:

Annual Health insurance subsidy
Superannuation
Paid Time Off (Vacation, Sick & Holidays)
Paid meals and snacks
Stock Option Plan

Compensation Range: A$160K - A$190K

Apply Now

Refine Your Search

backend developer jobs in fairfield, nsw

Full Stack Software Engineer - Agentic AI

DotNet Fullstack Developer

Engineering Manager - Full Stack (React, Next.js, Node,)

Senior Software Engineer (.NET)

AI Backend Developer, Binance Square (Java, Golang, Python)

Staff Software Engineer . NET, Full Stack

AI-native software developer

Senior Developer - Java / AWS / Microservices

Backend Developers

Full-Stack Engineer - Front-End Focused

Java Platform Performance Engineer (Performance Optimization) Fully Remote

Staff Software Engineer, Engine & Tools - Unpublished R&D Product

Senior Engineer - Full Stack (React/.Net) - AI Workflows

Quality Engineer

Backend Developer

Lead Software Developer

Senior Software Engineer

Mobile Architecture

Quality Engineer

Senior Backend Engineer - Java - Product Platform

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