# Full Stack Software Engineer - Agentic AI - Company: [Ninjatech Ai]() - Location: Sydney, NSW, Australia - Team: Engineering - Employment type: Full Time - Posted: May 13, 2026 ## 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](https://www.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](https://www.ninjatech.ai/about), 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)](https://super.myninja.ai/dashboard) * 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 ## Apply [Apply on Ninjatech Ai]() Canonical job page: