Hire the Best PhoneGap Developers

👋 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.

I develop high-performance hybrid mobile applications that deliver reliable results in real-world environments, including Firebase integrations, push notifications, custom native plugins, and complex SDK integrations. With 14+ years of experience and over 200 successfully delivered projects, I specialize in building, optimizing, and maintaining Android and iOS applications using Ionic, Cordova, Capacitor, Vue.js, and React Native. I help businesses launch scalable, cost-effective mobile solutions and solve critical issues that other developers struggle to fix. My expertise includes app stabilization, performance optimization, native SDK integration, App Store compliance, and troubleshooting complex mobile application challenges. ### What I Can Do for You ✔ Develop cross-platform mobile applications (Android & iOS) from scratch ✔ Convert existing websites or web applications into mobile apps ✔ Develop custom Cordova and Capacitor plugins ✔ Integrate native iOS and Android SDKs into Ionic applications ✔ Diagnose and resolve crashes, bugs, and performance bottlenecks ✔ Upgrade legacy applications (Cordova → Capacitor migration) ✔ Integrate APIs, Firebase services, and third-party platforms ✔ Resolve App Store and Google Play review and deployment issues ✔ Optimize application speed, stability, and user experience ### Technical Expertise • Ionic Framework (Angular & Vue) • Apache Cordova & Capacitor • Vue.js & React Native • JavaScript, TypeScript, HTML5, CSS3 • Native Android (Java/Kotlin) • Native iOS (Swift/Objective-C) • Firebase (Authentication, Firestore, Analytics, Push Notifications) • REST APIs & Third-Party Integrations • WebView Optimization & Plugin Debugging ### Specialized SDK & Plugin Development • Custom Cordova Plugin Development • Custom Capacitor Plugin Development • Native SDK Bridging for Ionic Applications • Microblink BlinkID Integration • Passport, Driver's License & ID Card Scanning • Selfie Verification & Face Matching • OCR & Document Data Extraction • Barcode & QR Code Scanning • Camera & Media Processing Integrations • Biometric Authentication • Payment Gateway SDK Integrations • Push Notification SDK Integrations One of my key specialties is developing custom native plugins for Ionic, Cordova, and Capacitor applications. I have successfully built and integrated complex SDKs, including Microblink BlinkID, enabling passport scanning, driver's license scanning, ID card recognition, selfie matching, and OCR-based data extraction on both Android and iOS. When a required SDK does not have an existing plugin, I can build the complete native bridge and integration from scratch. ### Why Clients Work With Me • Strong expertise in solving complex mobile application issues • Advanced debugging skills across native and hybrid environments • Extensive experience with plugin development and SDK integrations • Clear communication and reliable delivery • Proven track record with production-grade and long-term projects If your application is experiencing crashes, performance issues, SDK integration challenges, App Store rejections, or deployment problems, I can quickly identify the root cause and implement a reliable solution. From concept → development → deployment → scaling, I manage the complete mobile application lifecycle. Available to start immediately.

I help businesses build, optimize, and manage enterprise-grade contact center solutions using RingCentral and NICE CXone. With 8,000+ hours worked and $100K+ earned on Upwork, I specialize in designing reliable IVR systems, intelligent call flows, routing logic, and customer support automation for both small businesses and large enterprises. What I Can Help You With: ✔ RingCentral UCaaS & CCaaS setup and administration ✔ NICE CXone / InContact development and support ✔ IVR and call flow design ✔ Studio scripting and automation ✔ Omnichannel customer support solutions ✔ API integrations and workflow automation ✔ Technical troubleshooting and platform support ✔ Contact center optimization and reporting ✔ Post-implementation support, maintenance, and system optimization Why Clients Work With Me: ✔ Certified and experienced contact center engineer ✔ Strong communication and project ownership ✔ Fast problem-solving and reliable delivery ✔ Able to manage projects from planning to deployment ✔ Ongoing support available after implementation I focus on building scalable, user-friendly customer experience solutions that improve efficiency and customer satisfaction. Let’s discuss how I can help your business.

I build mobile apps, SaaS platforms, and games that are fast, scalable, and easy to maintain — not quick fixes that break down later. I work with startups, founders, and agencies who need a reliable technical partner to turn an idea into a working product, redesign an existing app, or fix issues in a live application. WHAT I BUILD: ✔ Mobile Apps (iOS & Android) — Flutter, React Native, Ionic/Cordova ✔ Web Apps & SaaS Platforms — React, Next.js, Angular ✔ Games — Unity 3D, Phaser ✔ E-commerce & WordPress websites ✔ API Integrations & Automation ✔ UI/UX Design (Figma to production) ✔ Admin Panels & Custom Dashboards RECENT WORK: - Cross-platform Flutter apps for startups - SaaS platforms from MVP to full launch - E-commerce websites with custom checkout flows - Unity mobile games (2D/3D) - UI/UX redesigns that improved retention - API integrations connecting third-party services WHY WORK WITH ME: Most developers write code. I build products — with attention to performance, scalability, and long-term maintainability, so you're not back here in 6 months fixing what someone else broke. Available for new builds, redesigns, MVPs, and long-term support. Let's talk about your project — send a message and I'll review your requirements and share how I'd approach it. .

As an AWS Advanced Tier Partner and Claude Partner, we help startups and enterprises design, build, deploy, and scale reliable AI solutions. ✅ AWS Advanced Tier Partner ✅ Claude Partner ✅ Enterprise AI Specialists ✅ Production-Ready AI Solutions ✅ Secure & Scalable Architecture ✅ Strong AI + Cloud Engineering Team ---------------------------------- Common Use Cases ---------------------------------- Automating legacy business workflows using GenAI and AI Agents Designing and building custom MCP (Model Context Protocol) servers Connecting legacy databases to MCP servers Building custom MCP tools for enterprise applications Connecting CRMs, ERPs, APIs, and internal systems to AI Developing AI agents that can read, reason, and take actions Building multi-agent systems for complex business workflows Creating enterprise AI copilots for employees Building customer support AI assistants Developing Retrieval-Augmented Generation (RAG) applications Integrating AI with existing SaaS products Automating document processing, extraction, and classification Building AI-powered search across enterprise knowledge Creating voice AI agents and AI calling systems Modernizing enterprise applications with Amazon Bedrock, Claude, and OpenAI Building secure AI APIs and backend services Deploying scalable AI solutions on AWS ------------------------- Expertise ------------------------- AI Workflow Automation Automating legacy workflows using GenAI AI-powered business process automation Intelligent workflow orchestration Human-in-the-loop AI systems Agentic AI Production-ready AI Agents Multi-Agent Architectures AI Copilots Autonomous task execution Tool-using AI Agents Planning and reasoning workflows MCP (Model Context Protocol) Designing and building MCP Servers Building custom MCP Tools Connecting legacy databases to MCP Connecting CRMs, ERPs, APIs, and enterprise systems through MCP Secure enterprise MCP deployments Enterprise AI Integration Internal AI assistants Customer support AI Enterprise knowledge assistants AI integrated into existing applications RAG (Retrieval-Augmented Generation) Document Intelligence Intelligent Document Processing Contract extraction Invoice processing Medical document analysis Legal document processing PDF understanding Document classification and indexing Reliable AI Engineering AI Evaluation frameworks Prompt Engineering AI Guardrails AI Testing Reliable AI system design Continuous AI improvement AI Observability AI tracing Agent monitoring Workflow debugging Performance monitoring Production observability Cost optimization Production Deployment Amazon Bedrock implementations Claude integration OpenAI integration AWS deployment Scalable cloud architecture Production AI infrastructure Technologies Model Context Protocol (MCP) Claude Amazon Bedrock OpenAI Gemini LangGraph LangChain LangSmith CrewAI Python FastAPI Node.js AWS Lambda ECS EKS Docker Kubernetes Terraform Pinecone PostgreSQL MongoDB Redis n8n Whether you need to automate legacy workflows, build MCP servers, design Agentic AI systems, integrate AI into enterprise software, or deploy production-grade AI on AWS, we can help turn your AI vision into a reliable, scalable solution. Let's build AI that doesn't just answer questions—it gets work done.

Computer professional with more than 9 years of experience in modern approaches for web, mobile and infrastructure development. Core skills: ✔ JavaScript(ES5, ES6, ES7), TypeScript, Angular(2-11), Ionic, NextJS ✔ Twilio SIP Trunking and Media Integration ✔ VAPI and ElevenLabs Voice Agents integration with Live Telephony Calls ✔ AWS SQS, SNS, EC2, Rabbit MQ, Web Sockets, Stripe, sFox, Algolia, PayCaddy ✔ MongoDB, PostreSQL ✔ Node.js, ExpressJS, NestJS ✔ ICE Servers, Media Servers ✔ WebRTC