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Senior Full Stack Engineer (Python, React, AWS) - Agentic AI StartupJoin to apply for the Senior Full Stack Engineer (Python, React, AWS) - Agentic AI Startup role at NinjaTech AIContinue with Google Continue with GoogleSenior Full Stack Engineer (Python, React, AWS) - Agentic AI Startup3 days ago Be among the first 25 applicantsJoin to apply for the Senior Full Stack Engineer (Python, React, AWS) - Agentic AI Startup role at NinjaTech AIGet AI-powered advice on this job and more exclusive features.Continue with Google Continue with GoogleContinue with Google Continue with GoogleContinue with Google Continue with GoogleContinue with Google Continue with GoogleContinue with Google Continue with GoogleContinue with Google Continue with GoogleWe invite you to join NinjaTech AI as a Senior Full Stack Engineer as we innovate together to build autonomous AI agents. For this role we will prioritize candidates who are leaning Frontend development (in React). This is an onsite position designed to build web applications and agentic AI systems with our strong ex-AWS founding engineering team.About the Company:NinjaTech AI is a generative AI startup (B2C and B2B) with headquarters in Silicon Valley and offices in Sydney and Vancouver. Our all-in-one AI assistant, Ninja, combines the best AI models and custom AI agents to empower our customers to quickly complete tasks across research, writing, coding, image generation, and more (think of an AI agent placing orders online, making reservations or building websites for you by accessing your phone apps or installing software on your computer when needed to complete a task - thats coming soon!).NinjaTech AI is backed by Alexa Fund and Samsung Ventures and we are on track to raise Series A funding in 2025.About the Role:The Senior Full Stack Engineer is a full-time position, based at our Sydney office (5 days on-site; great 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. Our velocity, scientific rigor and engineering excellence are exceptional.The Senior Full Stack Engineer will design, develop, integrate and deploy various AI technologies within NinjaTechs 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 (also ex-AWS and onsite in Sydney) as well as our a remarkable team of Software Developers and Applied Scientists, UX, QA and product managers.What you will do:As a key member of our engineering team, the Senior Full Stack Developer will be responsible for translating our vision and customer needs into functional and appealing interactive applications, ensuring a great user experience.Build features for our web app (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 Python and React, 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:5+ years of experience in software development, with a focus on building scalable and reliable web applications.Expert-level experience in Python and React.Experience with AWS Cloud.Strong expertise in various API protocols, including RESTful API and WebSockets.Familiarity with database technologies such as Firebase, Supabase, DynamoDB, NoSQL, PostgreSQL, or MySQL.Hands-on experience in building microservices for service-oriented architecture (SoA) on top of AWS services, leveraging various components (e.g., SQS, Lambda, SNS, ECS, etc.).Firm grasp of Javascript and Typescript and its nuances.In-depth understanding of the entire web development process (design, development and deployment).Familiarity with RESTful APIs and integration of backend services.Knowledge of version control systems (e.g., Git) and experience working with collaborative development tools.Ability to perform well in a fast-paced environment where deadlines are tight and priorities can change rapidly.Strong problem-solving skills and ability to work in a team environment.Experience working in an Agile development environment.Bachelor''s or Master''s degree in Computer Science or relevant field preferred.Benefits:NinjaTech AI offers excellent benefits:Annual Health insurance subsidySuperannuationPaid Time Off (Vacation, Sick & Holidays)Paid meals and snacksStock Option PlanSeniority levelSeniority levelMid-Senior levelEmployment typeEmployment typeFull-timeJob functionJob functionEngineering and Information TechnologyIndustriesTechnology, Information and InternetReferrals increase your chances of interviewing at NinjaTech AI by 2xSign in to set job alerts for Full Stack Engineer roles.Continue with Google Continue with GoogleContinue with Google Continue with GoogleSoftware Engineer, Early Career, NetSoftSydney, New South Wales, Australia 6 days ago2025 Software Development Graduate (AWS, Auckland,NZ), (0-2 Years, Entry-Level)Sydney, New South Wales, Australia 1 day agoSydney, New South Wales, Australia 2 weeks agoSydney, New South Wales, Australia 1 day agoSydney, New South Wales, Australia 3 days agoEveleigh, New South Wales, Australia 2 weeks agoSoftware Engineer, Engineering Productivity, Android, Early CareerSydney, New South Wales, Australia 2 days agoSoftware Engineer, Early Career, iOS, PhotosSydney, New South Wales, Australia 6 days agoSydney, New South Wales, Australia 6 days agoSydney, New South Wales, Australia 2 weeks agoSydney, New South Wales, Australia 4 days agoSydney, New South Wales, Australia 3 weeks agoSoftware Engineer (Expression of Interest)Sydney, New South Wales, Australia 3 weeks agoSydney, New South Wales, Australia 4 months agoSydney, New South Wales, Australia 6 days agoSydney, New South Wales, Australia 4 days agoSydney, New South Wales, Australia 4 days agoSydney, New South Wales, AustraliaA$150,000.00-A$175,000.001 month agoSoftware Development Graduate (2025, AWS)Sydney, New South Wales, Australia 5 days agoSydney, New South Wales, Australia 4 months agoSydney, New South Wales, Australia 1 month agoSydney, New South Wales, Australia 1 month agoSydney, New South Wales, Australia 3 weeks agoSydney, New South Wales, Australia 5 months agoSydney, New South Wales, Australia 2 months agoSydney, New South Wales, Australia A$100,000 - 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