Afolayan E.

Full-Stack & Backend Developer | Python, React, AI & VoIP

I build production-ready web applications, scalable backend systems, AI-powered workflows, and reliable VoIP solutions. My work covers the full development lifecycle, from understanding business requirements and designing the architecture to building the frontend and backend, integrating APIs, testing critical workflows, and deploying the application to production. I specialize in Python, FastAPI, Flask, Django, React, Next.js, TypeScript, Node.js, REST APIs, SQL and NoSQL databases, cloud deployment, AI integrations, and VoIP systems. What I Can Help You Build Full-Stack Web Applications and SaaS Platforms: I develop secure, responsive web applications using React, Next.js, TypeScript, Python, FastAPI, Flask, PostgreSQL, MySQL, MongoDB, Redis, and Tailwind CSS. This includes: • User authentication and role-based permissions • Admin dashboards and internal business tools • Subscription and credit-based SaaS platforms • Payment and webhook integrations • Customer portals and reporting dashboards • Workflow automation and scheduled background jobs • Responsive frontend interfaces Python Backend Development and API Integration: I design clean, maintainable backend services and REST APIs for web applications, mobile clients, AI features, and third-party systems. My backend work includes: • FastAPI and Flask development • Asynchronous and background task processing • REST API design and external API integration • PostgreSQL, MySQL, MongoDB, and Redis • Authentication, authorization, and secure sessions • Webhooks, caching, task queues, and automation • Error handling, monitoring, and performance optimization AI, LLM, and Automation Development: I build AI-powered applications that go beyond simple API calls. I design multi-stage workflows for content processing, structured generation, document creation, image generation, background automation, and AI agent functionality. My experience includes: • OpenAI and other LLM integrations • Prompt design and structured outputs • AI agents and automated workflows • Web scraping and content-processing pipelines • Asynchronous AI task execution • Image-generation integrations • PDF and report generation • Rate-limit handling, retries, caching, and fallback logic VoIP, SIP, WebRTC, and PBX Systems: I also work with browser-based and server-based telephony systems using SIP, WebRTC, Asterisk, FreePBX, FusionPBX, 3CX, and Twilio. I can assist with: • FreePBX and Asterisk installation and configuration • SIP trunks, extensions, dial patterns, and outbound routes • Browser softphones and WebRTC calling • SIP registration and reconnect troubleshooting • Inbound and outbound call routing • INVITE, CANCEL, BYE, and REGISTER flow debugging • Audio, ringback, ringtone, and media-stream issues • Power dialers and contact-centre workflows • Production code reviews and architectural audits Selected Project Experience AI Newsletter SaaS Platform — Lead Full-Stack Developer: I architected and developed a production SaaS platform using Next.js, React, TypeScript, FastAPI, Python, MongoDB, Redis, Stripe, AWS S3, Vercel, and Render. The platform included authentication, Google OAuth, secure admin access, credit-based billing, Stripe webhooks, AI content generation, web scraping, image generation, background processing, PDF generation, scheduled automation, audit logs, system-health monitoring, and admin dashboards. SIP.js and FusionPBX Dialer Assessments: I completed two paid technical assessments of a React, TypeScript, SIP.js, WebRTC, and FusionPBX browser dialer. The work involved source-code review, architectural analysis, and PostHog telemetry analysis covering SIP registration, transport recovery, power-dialer execution, session cleanup, media playback, call-state coordination, and failure recovery. Internal Management and Customer Dashboard Platform: I developed the frontend and backend of an internal business-management system using React, Tailwind CSS, Python Flask, and MySQL. The platform covered customer management, products, inventory, production workflows, campaigns, reporting, authentication, APIs, data validation, audit logging, and customer dashboards. Microsoft Research Python Study: I participated in a structured Microsoft Research software-development study using Python and Visual Studio Code in a Microsoft cloud environment, completing all eight assigned coding tickets. How I Work: I begin by understanding your existing system, business workflow, technical constraints, and desired outcome. I then review the architecture, identify risks, recommend a practical approach, build in clear phases, test critical workflows, configure deployment, and provide documentation for maintenance and handover. Need a full-stack application, Python backend, AI workflow, API integration, or VoIP system that must work reliably in production? Send me an invitation with your requirements, current stack, and the problems you need solved.