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My name is Ivan and I'm an experienced and versatile software developer with a heavy tech stack and expertise in various areas. My approach is most fitted for definition - “get the best and cheapest solution”. I develop applications using microservices architecture that allows me to create efficient and scalable solutions. My projects include highly loaded applications requiring complex computations, as well as creating APIs for web and mobile clients. I also deploy, at its best, applications in the cloud, such as GCP or AWS. My favorite part of the development process is the automation and facilitation of development processes. Skills: 📃 Programming languages: Python, PHP, JavaScript, Typescript, C++ 📃 Libraries and frameworks: Django, aiohttp, Symfony, ApiPlaform, Postgraphile, Vue3, Qt 📃 Databases: PostgreSQL (+PostGIS), MySQL/MariaDB, Redis 📃 API: Stripe, PayPal, Twilio, Au10tix 📃 Cloud: Google Cloud Platform, AWS, Digital Ocean 📃 Virtualization and automation: Kubernetes, Docker (+Nvidia/CUDA), Gitlab CI/CD, AWS CloudFormation 📃 Controllers: ESP8266, STM32F4, Arduino

After years of work in product and outsourcing companies, I'm excited to bring my expertise to the Upwork community. If you are looking for a Senior Android/iOS Developer I am happy to help. I'm no stranger to complicated problems and happy to help you resolve them. It's not only about writing some code. My goal is also to offer expertise, suggest improvements and execute tasks as efficiently as possible. If you are just getting started on your road to becoming the next Google, I would be glad to assist you in achieving your goals. Let's discuss it!

💡 Smart software. Real results. Hi, I’m Ruslan, a senior tech consultant, system architect, and founder of JUSPIT — a software agency that helps businesses automate, scale, and grow through smart tech. 🔧 What I do best: • Build custom SaaS platforms from zero to production • Automate business processes, CRM & ERP systems (1C, Bitrix24, Insales, etc.) • Set up DevOps pipelines, Docker, CI/CD, and cloud infrastructure • Integrate APIs, Telegram bots, and analytics dashboards 💼 My background: • 10+ years in full-cycle product delivery — from MVPs to enterprise tools • Helped 20+ businesses in retail, logistics, and finance save 100+ hours/month via automation • Experience with teams across 🇺🇸 US, 🇪🇺 EU, 🇺🇦 Ukraine, 🇰🇿 Kazakhstan ⚙️ Tech stack: Languages: Python, JavaScript (Node.js, Vue, React) Infrastructure: Docker, Nginx, Supabase, Postgres, Redis DevOps tools: GitLab CI/CD, n8n, Kong, Cloudflare Integrations: 1C, Bitrix24, CRM, marketplaces (Ozon, Avito, etc.) 💬 Let’s discuss how I can help you automate your workflow or build a scalable system that saves time and boosts ROI.

I help companies replace repetitive communication with intelligent AI Voice & Chat Agents that work 24/7, sound human, and integrate deeply with CRMs, PBX systems, and business workflows. I’m an AI Voice & Automation Engineer with 9+ years of experience building scalable, production-grade systems – from AI receptionists and outbound callers to multi-agent orchestration platforms for sales, healthcare, real estate, and operations-heavy businesses. My focus is not “bots for the sake of bots”, but agentic systems that qualify leads, confirm data, schedule appointments, and move KPIs. 🧠 What I Build ✔ AI Inbound Voice Agents Handle calls, collect structured data, qualify leads, confirm details, and book meetings via PBX, Kamailio, Asterisk, FreeSWITCH, LiveKit, Twilio, Telnyx. ✔ Outbound AI Voice Agents Automated follow-ups, lead reactivation, reminders, promotions, and confirmations with real conversational logic. ✔ AI Receptionists (Clinics, Hotels, Services) 24/7 booking, reminders, FAQs, and CRM sync using STT → TTS, SMS, and calendar integrations. ✔ AI Recruiter & Screening Agents Voice-based candidate screening with multi-layer logic, scoring, and CRM synchronization. ✔ Real Estate & Property Voice Assistants Answer property questions, book showings, confirm via SMS/email, and sync with CRMs and calendars. ✔ AI Chatbots & Call Assistants Context-aware conversational bots connected via n8n, Make, Zapier, APIs, and databases. ✔ Custom AI Voice Logic & Agentic Systems Built with Vapi, RetellAI, ElevenLabs, Ultravox, Claude, GPT, memory, state management, and fallback logic. 🔐 Data Security & Compliance Security is built-in, not added later. For healthcare and sensitive industries, I implement: HIPAA-aligned architectures Encryption at rest & in transit Access control & audit logging Secure API & CRM integrations ⚙️ How It Works ✔ Discovery & Demo – Real use cases, not theory ✔ Conversation & Logic Design – Goals, tone, flows, edge cases ✔ Development & Integration – Voice, CRM, PBX, automations ✔ Testing & Optimization – Based on real calls & metrics 🚀 Recent Systems Delivered Dental AI Receptionist – 100% inbound call automation + SMS reminders Recruitment AI Caller – 10+ qualification layers with CRM sync Hotel Voice Concierge – Check-in, tipping, room service automation Restaurant AI Assistant – Reservations, menu Q&A, POS sync ✅ Why Clients Choose Me ✔ KPI-driven development (conversion, speed, call quality) ✔ End-to-end ownership – from logic to production deployment ✔ Human-grade voice experience with memory & context ✔ Deep VoIP, PBX, and CRM expertise (not just “prompt engineering”) ✔ Clean, scalable, maintainable systems 🧩 Technology Stack & Keywords (SEO-Optimized) AI Voice Agent Development, AI Voice Architect, Voice Agent, AI Voice Receptionist, AI Voice Chatbot Developer, AI Call Assistant PBX / VoIP / Telephony: Kamailio, Asterisk, FreeSWITCH, LiveKit, Twilio, Telnyx, SIP, PBX AI & LLMs: Claude, GPT, OpenAI API, LangChain, Whisper, STT, TTS, ElevenLabs, RetellAI, Vapi, Ultravox Automation & Orchestration: n8n, Make.com, Zapier, Workflow Automation, Workflow Orchestration CRMs & Business Tools: HubSpot CRM, Zoho CRM, Pipedrive, GoHighLevel, Airtable, Salesforce Backend & Infra: Python, Node.js, FastAPI, REST API, Docker, Cloud Deployment (AWS, Azure, GCP) 📅 Let’s Talk If you want to: ✔ Eliminate missed calls ✔ Automate lead qualification & scheduling ✔ Deploy AI Voice Agents that actually convert Let’s connect. I offer a free 30-minute strategy session to design the right AI Voice solution for your business.

👋 Hi, I’m Oleksii - a Twilio expert with over 7 years of hands-on experience building scalable, real-time communication systems using the full Twilio stack: 📞 Programmable Voice / SMS, 🧠 TaskRouter & Flex, 🎛️ Studio, Functions, Conversations, Sync, Webhooks and more. I’ve successfully completed 120+ Twilio projects on Upwork, including: • Eliminating latency issues in phone calls 🔧 • Creating SMS marketing automation pipelines 📲 • Developing full-scale Flex dashboards with custom workflows 🧩 Clients describe me as: “Very skilled, excellent communicator, smart guy and a pleasure to deal with.” “Oleksii was very helpful and available :) We no longer have problems with latency during our phone calls.” 🛠 Whether you need help with: • Twilio Studio call flows • Complex webhook-based automation • TwiML, IVR, call forwarding setups • Integrating Twilio with CRMs or internal systems • Building voice/SMS logic in Node.js, Laravel, or Firebase environments …I’ve got you covered. Let’s bring your Twilio-powered solution to life 🚀 Feel free to invite me to your job or message me with questions.

Web Developer, PHP, JS, Erlang, Postgresql, Linux, Voip, Windows, Server Administratio, Network administration , Freeswitch, Asterisk, SIP, Postgres, Database.