Full Stack Engineer
Posted 30 days ago · 0 applicants
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The role in plain words
This role involves building and maintaining scalable web and mobile applications using React, TypeScript, and Node.js. You will design backend services on AWS, integrate LLM orchestrations, and collaborate with product teams to create polished user interfaces.
- 6+ years of experience building and scaling modern web applications in a Full Stack capacity
- React
- TypeScript
- Node.js
- AWS infrastructure (Serverless, Lambda, ECS, etc.)
- Experience with AI/LLM integrations
- WebSockets
- Customer service platforms
Extracted from the job description · kept up to date automatically
Who this suits
This role suits experienced engineers with over six years of full-stack experience, strong React and Node.js skills, and a startup mindset. It is less ideal for those seeking a highly structured corporate environment or those without cloud infrastructure experience.
Full job description
Original listing · kept for referenceAbout HiO
HiO is an AI Business Partner for small and medium business owners, unifying customer conversations from every platform into a single, intelligent co-worker that proactively surfaces growth opportunities and flags what actually needs the owner’s attention. The market demand for this kind of intelligent automation is explosive, but executing it flawlessly is a deep technical challenge.
We aren't just building a simple LLM wrapper; we are architecting a complex, highly reliable system capable of orchestrating sophisticated agentic workflows at scale. To meet this massive market pull, we’ve raised a $16M seed round from the visionary VCs behind OpenAI and Anthropic, alongside Wix as a strategic investor. We’re a high-talent, fast-moving team building the future of how small businesses thrive, and we’re just getting started.
About the Role
Join HiO as a Senior Full Stack Engineer and help architect our Agentic AI System. You’ll be responsible for building the entire lifecycle of our product—from high-performance Node.js services on AWS to polished, real-time React experiences that make AI feel human.
In this role, you will bridge the gap between complex AI logic and intuitive user interfaces. You’ll have a seat at the table to influence our technical foundation, backend architecture, and product direction as we scale AI-native customer experiences to millions of SMBs.
What you’ll do
• End-to-End Ownership: Build and maintain scalable, performant web and mobile applications using React, TypeScript, and Node.js.
• Architect for Scale: Design and implement robust backend services and APIs on AWS to support real-time, agent-driven features.
• AI Integration: Collaborate with AI engineers to integrate sophisticated LLM orchestrations and live customer interactions into a seamless product experience.
• Foundation Building: Shape the architecture, standards, and CI/CD pipelines of HiO’s full-stack systems.
• Product Craftsmanship: Partner with product and design to craft highly polished, intuitive, and delightful user experiences from the database to the UI.
• Technical Leadership: Champion best practices in system design, performance, security, and code quality.
What we’re looking for
• 6+ years of experience building and scaling modern web applications in a Full Stack capacity.
• Frontend Mastery: Deep expertise in React and TypeScript, with a strong eye for design and UX detail.
• Backend Excellence: Proven experience building production-grade services with Node.js.
• Cloud Native: Strong hands-on experience with AWS infrastructure (Serverless, Lambda, ECS, etc.).
• System Thinker: Experience with real-time, data-intensive interfaces and complex state management.
• Startup Mindset: Comfortable in a fast-paced, product-led environment where you need to move fast without breaking things.
• Bonus: Experience with AI/LLM integrations, WebSockets, or customer service platforms.
Why HiO
• High Impact: Be a foundational member of a core engineering team, playing a pivotal role in redefining how small businesses engage with their customers.
• Cutting-Edge Tech: Build at the forefront of agentic AI, solving first-of-its-kind challenges at the intersection of backend orchestration and human collaboration.
• Growth & Equity: Competitive compensation, meaningful equity, and real career growth in a fast-scaling, VC-backed AI startup.
Questions about this role
- This listing did not state a salary. We only show pay when the employer publishes it.
- 6+ years of experience building and scaling modern web applications in a Full Stack capacity, React, TypeScript, Node.js, AWS infrastructure (Serverless, Lambda, ECS, etc.)