Job Url: https://www.linkedin.com/jobs/view/4367342861/?eBP=BUDGET_EXHAUSTED_JOB&trk=flagship3_search_srp_jobs&refId=fBfy7D2FMkBln3fHDMJgMg%3D%3D&trackingId=C%2BeQZuHt6kCJ1ue5RtSNyw%3D%3D Job Description: Full Stack Engineer United States · 2 hours ago · 79 applicants Promoted by hirer · No response insights available yet Remote Full-time Easy Apply Save Use AI to assess how you fit Get AI-powered advice on this job and more exclusive features with Premium. Try Premium for PKR0 Show match details Tailor my resume Help me stand out People you can reach out to Meet the hiring team Jonathan Haberkorn • 3rd Partner @ Intrizen | 2025 Inc. 5000 Honoree | SAP Partner | Human-Centered Systems | AI for People | Aviator Job poster Message About the job Company Description Intrizen, a recognized leader in digital transformation, specializing in HR and IT systems powered by workflow automation and AI for People. Named to the 2025 Inc. 5000 list of America’s Fastest-Growing Private Companies, Intrizen serves prominent clients such as American Airlines, Grainger, and Lowe's. The company is dedicated to helping organizations reimagine collaboration between people and technology. With headquarters in Naples, Florida, Intrizen has achieved high rankings in both national and regional growth recognition. Visit intrizen.com to learn more about our services and case studies. Position Summary We are seeking a Senior Full-Stack Developer who will own the entire software development lifecycle (SDLC) for one or more products. This role will also serve as the Product Manager for those platforms. This role blends hands-on engineering with product ownership—defining requirements, shaping user experience, prioritizing roadmaps, and delivering production-ready SaaS systems. The ideal candidate is both a strong engineer and a pragmatic product thinker who can translate business needs into scalable technical solutions. Key Responsibilities Act as the Full Stack Developer + Product Manager, including: Own the full SDLC from ideation and requirements definition through development, testing, deployment, and iteration Translating business goals into technical requirements Defining MVP scope, feature prioritization, and product roadmaps Collaborating with stakeholders to refine user workflows and UX Design, build, and maintain production-grade SaaS platforms across multiple products Develop modern front-end applications modern web languages React, TypeScript, and TailwindCSS to name a few. Build and scale backend services and APIs using Python (FastAPI) and/or Node.js (Express) Architect and maintain core SaaS capabilities: Multi-tenant architecture and RBAC Authentication and authorization Subscription management, usage tracking, and billing Environment separation (dev/stage/prod) Feature flags and modular services Participate in architectural decision-making and set early engineering best practices Troubleshoot production issues and continuously improve system reliability and performance Design and manage scalable data models using PostgreSQL, with supporting technologies such as Redis, queues, and background workers Contribute to analytics dashboards, reporting layers, and operational insights Implement CI/CD pipelines and deploy services to AWS or GCP Ensure secure-by-design development aligned with SOC 2 and ISO 27001 standards Integrate Enterpise Software + AI technologies, including: All major LLM providers (OpenAI, Anthropic, Grok, and others) Voice AI and speech technologies (STT/TTS, real-time voice pipelines) Prompt orchestration, routing, latency optimization, and cost controls HubSpot CRM Enterprise HR platforms (SAP SuccessFactors, Workday) Other third-party business systems and APIs Required Qualifications 5–7+ years of full-stack development experience Proven experience owning features or products end-to-end Strong proficiency with React + TypeScript Backend experience with FastAPI (Python) and/or Node.js (Express) Strong understanding of PostgreSQL and relational data modeling Experience with asynchronous systems (Redis, background jobs, queues) Hands-on experience integrating third-party APIs and enterprise systems Experience working with AI/LLM platforms and voice technologies Strong experience implementing Stripe subscriptions and usage-based billing Ability to balance product tradeoffs, timelines, and technical quality Strong system design, debugging, and decision-making skills Excellent written and verbal communication skills Preferred Qualifications Experience acting as a product owner or technical product manager Experience with voice AI or real-time communication systems Experience integrating enterprise HR platforms (SAP SuccessFactors, Workday, Oracle, ADP) Familiarity with AI orchestration patterns (agents, tool use, evals, guardrails) Experience with Docker, GitHub Actions, and cloud-native infrastructure Experience working in compliance-aware environments (SOC 2, ISO 27001) Core Tech Stack Frontend React TypeScript TailwindCSS Vite / Next.js Modern component-based UI architecture Responsive & accessible design Backend Python FastAPI Node.js Express.js REST APIs Webhooks Background workers & job queues Databases & Data PostgreSQL SQL Redis Data modeling & migrations Multi-tenant schemas AI & Automation OpenAI (GPT-4, GPT-4o, etc.) Anthropic (Claude) Grok Large Language Models (LLMs) Prompt engineering & orchestration Tool calling & agent workflows Voice AI (STT / TTS pipelines) Real-time AI systems Latency & cost optimization Voice & Real-Time Systems Twilio (Voice & Messaging) WebRTC Speech-to-Text (STT) Text-to-Speech (TTS) Streaming audio pipelines SaaS Platform Architecture Multi-tenant SaaS architecture Authentication & Authorization (RBAC) Subscription lifecycle management Usage-based billing & metering Stripe subscriptions & payments Feature flags Environment separation (dev / staging / prod) Integrations & Enterprise Systems HubSpot CRM SAP SuccessFactors Workday Enterprise HRIS integrations Third-party REST APIs OAuth 2.0 / API keys Cloud & DevOps AWS or Google Cloud Platform (GCP) Docker GitHub Actions CI/CD pipelines Infrastructure-as-code concepts Monitoring & logging Security & Compliance SOC 2 ISO 27001 Secure data handling Secrets management Audit logging Product & SDLC Full SDLC ownership Technical product management Requirements definition & prioritization MVP scoping Agile / Scrum Jira / Linear / GitHub Projects