Senior Fullstack Developer (AI Chatbot / RAG Systems)

At Robots & Pencils, we build meaningful, scalable software experiences that help innovative organizations move faster and smarter. We are seeking a Senior Fullstack Developer to support the rapid development of an AI-powered chatbot platform leveraging Retrieval-Augmented Generation (RAG). This role is ideal for an experienced engineer who thrives in fast-paced environments, enjoys building across the stack, and is excited to work at the intersection of modern web development and AI systems. 

In this role, you will work as part of a strategic, embedded delivery team focused on prototyping and production readiness for AI-driven solutions. You will collaborate closely with UX designers, AI engineers, and client stakeholders to iterate on user interfaces, build supporting backend systems, and help de-risk the solution as it evolves toward production. Your work will be highly visible and critical in shaping both the technical foundation and user experience of an emerging AI product. 

 

Key Responsibilities 

Fullstack Engineering & Application Development 

• Design, build, and iterate on frontend applications using React 

• Develop backend services and APIs using C# / .NET to support AI-driven workflows 

• Rapidly prototype and refine features to validate requirements and technical feasibility 

• Contribute to scalable, maintainable codebases aligned with engineering best practices 

• Support deployment readiness, including performance considerations and system stability 

AI-Augmented Development 

• Treat AI-assisted development (e.g., Claude Code, Kiro, Cursor, GitHub Copilot) as a baseline capability, integrating these tools seamlessly into your daily workflow to improve speed and efficiency 

• Apply thoughtful prompt engineering and structured interaction patterns to produce reliable, maintainable code 

• Go beyond basic AI assistance by leveraging more advanced techniques (e.g., spec-driven development, test-driven prompting, and iterative refinement workflows) to improve code quality, consistency, and alignment with requirements 

• Use AI tools to support the full development lifecycle, including design exploration, implementation, testing, and documentation 

• Stay current with the rapidly evolving AI tooling landscape, critically evaluating and adopting new tools or practices that meaningfully improve developer productivity and outcomes 

 

AI System Integration & Prototyping 

• Collaborate with AI Engineers to integrate chatbot functionality powered by RAG architectures 

• Build supporting services and interfaces that enable seamless interaction with AI models 

• Help de-risk AI solutions by validating technical assumptions and identifying potential gaps 

• Contribute to shaping system architecture for future production-scale implementation 

Client-Facing Development & Collaboration 

• Work directly with client stakeholders to understand requirements and translate them into technical solutions 

• Collaborate with UX designers to iterate on UI/UX and deliver intuitive user experiences 

• Participate in regular client discussions, demos, and feedback sessions 

• Communicate technical decisions clearly to both technical and non-technical audiences 

API Development & Platform Integration 

• Develop and maintain APIs that connect frontend applications with backend and AI services 

• Integrate with external systems and data sources as needed for chatbot functionality 

• Contribute to architectural decisions ensuring scalability, reliability, and flexibility 

Quality, Testing & Engineering Excellence 

• Write clean, testable, and maintainable code 

• Participate in code reviews and contribute to continuous improvement of engineering standards 

• Collaborate with team members to troubleshoot and resolve issues efficiently 

Collaboration, Communication & Mentorship 

• Work closely within a cross-functional team including designers, engineers, and AI specialists 

• Provide technical guidance and share knowledge within the team 

• Communicate progress, risks, and solutions effectively across stakeholders 

Innovation & Continuous Improvement 

• Stay current with evolving AI technologies and frontend/backend best practices 

• Explore new tools and approaches to improve speed, quality, and system design 

• Contribute to the advancement of AI-driven product development within the organization 

 

Required Skills & Experience 

• B.S. in Computer Science, Computer Engineering, or equivalent experience 

• 5+ years of professional software development experience delivering production applications 

• Strong experience with: 

• React (frontend development) 

• C# / .NET (backend development) 

• Experience building and integrating APIs 

• Strong understanding of modern application architecture and development best practices 

• Demonstrated experience using AI coding tools (e.g., GitHub Copilot, Cursor, Claude) as part of daily development workflow 

• Experience working in fast-paced, iterative development environments 

• Comfortable working in client-facing roles 

 

Tech Stack You Will Work With 

• Frontend: React, JavaScript / TypeScript 

• Backend: C#, .NET 

• AI / Systems: RAG-based architectures, AI integrations 

• AI Dev Tooling: Claude Code, Kiro, Cursor, GitHub Copilot, or equivalent AI-assisted development tools 

• Cloud & DevOps: AWS or Azure (environment-dependent), CI/CD pipelines 

• Tooling: Git, modern IDEs, testing frameworks 

 

Personal Attributes 

• Fast-Moving Builder: Thrives in rapid prototyping and iterative development environments 

• Collaborative: Works effectively across design, AI, and engineering teams 

• Client-Centered: Comfortable engaging directly with stakeholders and adapting to feedback 

• Curious & Adaptable: Excited by emerging AI technologies and evolving requirements 

• Solution-Oriented: Focuses on delivering practical, scalable outcomes 

 

Why Join Robots & Pencils? 

At Robots & Pencils, you’ll join a global team of engineers, designers, and strategists who care deeply about craftsmanship and innovation. You’ll work on cutting-edge AI initiatives, helping shape next-generation products that blend intelligent systems with thoughtful user experience. If you enjoy working at the forefront of AI, collaborating with talented teams, and building impactful solutions from prototype to production, we’d love to meet you.