Pasona N A, Inc. · 16 hours ago
Sr. Software Engineer - AI Function Development
Irvine, CA
Full-time
Hybrid
Mid, Senior Level
$120K/yr - $135K/yr
5+ years expPasona N A, Inc. is seeking a versatile Senior Full-Stack Software Engineer with a strong passion for building AI-first products. This role involves owning the full lifecycle of AI-powered features, blending traditional full-stack engineering with modern AI development to deliver scalable, production-ready solutions.
Human ResourcesSmall and Medium BusinessesStaffing Agency
No H1B
Responsibilities
End-to-End Feature Ownership: Design, develop, and deploy features (including AI-driven functionality), taking ownership across the entire stack—from intuitive front-end interfaces to robust back-end systems
AI-Powered System Architecture: Build and maintain scalable, production-ready architectures that integrate Large Language Models (LLMs) into core product workflows
AI Implementation & Optimization: Implement and refine AI pipelines using modern orchestration tools (e.g., LangChain, Vercel AI SDK) and prompt-engineering techniques to ensure high-quality outputs
Full-Stack Engineering Excellence: Develop high-performance APIs and web services using modern TypeScript-based stacks, ensuring seamless data flow and an excellent user experience
Rapid Prototyping & Iteration: Operate effectively in a fast-paced, ambiguous environment by translating high-level AI concepts into functional, scalable software
Cloud-Native Operations: Deploy, manage, and optimize containerized services to ensure reliability, performance, and scalability of AI-driven applications
Qualification
Required
5–10 years of experience in web, backend, or full-stack development
Proven experience designing, building, and operating production systems
Hands-on experience developing or integrating AI / LLM-based features
Strong ability to learn, adapt, and work with evolving technologies and architectures
Comfortable working in fast-moving, ambiguous product environments
Preferred
Experience with modern TypeScript stacks (React, Node.js, Bun, etc.)
Experience with containerized or cloud-native systems (Docker, Kubernetes, etc.)
Experience with AI development frameworks (Vercel AI SDK, LangChain)
Company
Pasona N A, Inc.
Pasona N A is a staffing and recruiting company that provides temporary staffing and full-time placement services.
201-500 employees
Funding
Current Stage
Growth StageLeadership Team
Kenji Furushiro
President and CEO
Sayaka Doi
VP of Strategic IT Partner
Company data provided by crunchbase