Oleksandr P.

I specialize in complex integrations and custom solutions: fintech (Plaid, Payliance, Stripe, DocuSign, ACH and debit card processing), AI agents and LLM platforms (LangChain, LangGraph, Azure OpenAI), call center systems (Twilio Flex, Twilio Studio), and real-time interactive web applications.

List of my skills:
Backend: PHP (Laravel, Laravel Nova, CodeIgniter, Zend), Node js (Express, NestJS, Strapi)
Frontend: JavaScript, TypeScript, Vue 2 and 3 (Pinia, Vue Flow, Chart js), Nuxt, React, WebSockets
Databases: MySQL, MongoDB, Redis, Elasticsearch
Cloud and DevOps: AWS, DigitalOcean, Nginx, Docker, Cloudflare, CI and CD (GitHub, GitLab)
AI and Automation: LangChain, LangGraph, Azure OpenAI, OpenAI, Neuron AI, Vercel AI SDK, LLM Integration, n8n
Workflows and Realtime: Temporal, Laravel Horizon, Reverb, Echo, Socket IO
Browser Automation: Playwright (Chromium)
Communications: Twilio, Twilio Flex, Twilio Studio, SendGrid
Fintech and Payments: Plaid, Payliance, Stripe, PayPal, DocuSign
Ecommerce: Shopify, Aimeos
Testing: PHPUnit, Cypress, Jest, Vitest

If you are interested in long-term cooperation, have interesting projects, or just want to get answers to your questions, don't hesitate to contact me.