Full Stack Software Engineer - Agentic AI

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.

About the Role: 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.

What you will do:

- Design, develop, integrate and deploy various AI technologies within NinjaTech’s Agentic AI product.
- Report to the VP of Engineering and collaborate daily with the Chief Science and Technology Officer, Founder/CEO and team.
- 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: comfortable working across frontend, backend, and infra. 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. Ownership mentality. Strong problem-solving skills and ability to work in a team. Bachelor's degree in Computer Science or relevant field preferred.

Nice to Have: Startup experience. End-to-end projects. Experience with TypeScript, WebSockets, CI/CD pipelines, or service-oriented architectures. Interest in AI/ML and how large language models work.

Benefits: Annual Health insurance subsidy. Superannuation. Paid Time Off (Vacation, Sick & Holidays).

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