Hire the Best Transaction Processing Specialists
in Ukraine

I am a senior EMV L3 certification and payment integration consultant with 10+ years of hands-on experience in POS, SoftPOS and ATM solutions. I have delivered 50+ successful Visa, Mastercard MTIP, JCB, Amex and UnionPay certifications for POS/ATM vendors, acquiring banks and processors across Europe, the Middle East and Asia. My core expertise includes: • EMV Level 3 certification (Retail & Cash) • POS, SoftPOS (CPoC / MPoC) and ATM integrations • ISO8583 transaction flows and payment debugging • Processor-side integrations (Tieto, CompassPlus, Way4, SmartVista, UPC, MADA and D8-based processors) • UL / FIME certification labs and scheme simulators I regularly work with product and engineering teams at the stages where certification, scheme compliance or complex payment issues need to be resolved efficiently. Available for contract, consulting or full-time engagements. Remote.

Hello! I'm attentive to details and I'm good at working with data and all kinds of documents. I like to work with Quickbooks Online (Bank transactions, Invoices, Accounts Payable, Accounts Receivable, Reconciling accounts), Excel and Google sheets (data consolidation, manipulation, re-organization, filtering, sorting, validation, and cleanup, import, conversion, functions, formulas, charts, flow charts, tables, pivot table, pivot charts, etc.) I have 5+ years of experience part-time working as a Quickbooks Online Bookkeeping Assistant and a Virtual assistant at Upwork, 5+ years of experience full-time working as an accountant (complete cycle of bookkeeping and tax accounting for Ukrainian companies), and 10+ years of experience full-time working as a foreign trade activity specialist in purchasing and logistics departments. (My job involved: • Internet research and verification of information about suppliers • preparing statistical reports, data analysis, maintaining databases • conducting business correspondence with foreign suppliers • organizing business trips and appointments • collaboration with transport and logistics companies, • tracing of international transportation of imported goods, • preparing documents for customs clearance of goods, • calculating of payments • control of mutual settlements) Don't hesitate to contact me!

Andrian Burii Senior specialist of treasury operations Experienced, responsible and highly motivated employee with a solid background of banking operations functions. Interested in working as writer and translator.

I’m Pavlo Pohuliailo, Founder of Deveteria (AI Development Team) - raised $100k in the financial year 2025-2026) Over the last few years, I’ve led 20+ AI solutions from idea to enterprise-grade production. With a team of 50+ experienced AI Engineers, AI Agent Developers, AI Researchers, IOS Mobile developers (Flutter, React Native), Frontend developers, Backend developers, Product Manager, DevOps, MLOPS, and many more. ✅ We are a fit if: Your company has a minimum of 5+ people already executing. You are the direct decision maker or can approve technical direction. Your project budget is at least $5,000 USD+ for the first phase. You aim for at least $10,000+ measurable efficiency or operational savings within 90 days from AI deployment. You are ready to begin within the next 2 weeks. ❌ We are not a fit if: Pricing is the primary factor above outcome, speed, and quality. You expect provable meaningful results inside 14 days or less. Your business falls under gambling, adult, or similar restricted categories. You are not collaborative or not open to strategic guidance. ⚡ Real Results ✅ TOINGG – Handles 10,000+ AI calls/min with 99.9% uptime ✅ AI Outreach Engine – Converted 200 cold messages → 8 booked meetings ✅ Trusted globally – by startups, agencies & enterprises across the US, UK, UAE, Australia and many more.. 🧩 Our Expertise 🔊 AI Voice & Communication - AI calling agents (TOINGG – our own product) - Voice interviewers & virtual receptionists - WhatsApp + Voice chatbot integrations - Sentiment-aware, memory-powered bots 🧠 Autonomous AI Agents - Multi-agent systems for recruiting, trading & operations - GDPR & EEOC-compliant recruiter AI - RAG pipelines + LLM-based decision logic - Hybrid human + AI workflows 🛍️ eCommerce & Retail AI - Shopify-integrated voice bots - Dynamic product recommendation systems - AI-powered sales & support automation 📊 AI Analytics & Insights - Personalized recommendation engines - AI-driven dashboards & business forecasting - Automated reporting with natural-language summaries 💼 Custom AI Use-Cases - Legal AI (Spanish law databases – RAG-based) - AI content & script generators for marketing - Healthcare marketplaces with smart matching 💡 How We Help 🔨 End-to-End Product Development - From idea → MVP → scale 👥 Team Augmentation - Add our vetted AI engineers or full dev pod to your team ⚙️ Optimize or Scale Existing Systems - We take over, refactor, and scale existing products seamlessly 🤝 Why Teams Work With Us ✅ Proven AI & Product Experience – not just prototypes, we ship in production ✅ Startup-Minded Speed – we build like cofounders, not contractors ✅ Enterprise-Grade Quality – security, compliance, uptime built-in ✅ Transparent Estimates – no surprises, every milestone defined ✅ Expert-Led Team – 32 vetted AI engineers & product specialists 💬 Let’s Talk We usually respond within minutes. Whether you’re building a new AI product or scaling an existing one — let’s make it production-ready. 📩 Message me today and let’s bring your AI vision to life.

✅ 50+ SaaS projects successfully completed, 14+ MVP done 2️⃣8️⃣ of them in the payments and fintech space - including PSP platforms, payment orchestration systems, hosted fields & checkout flows, and trading platforms for fintech clients. Hands-on integration experience with Stripe, Apple Pay, iDEAL, PayPal and other major payment gateways. 🏆 TOP RATED PLUS | In Top 3 Laravel Developer | Payment Systems Expert | AI-Powered SaaS Specialist | PHP Laravel Developer 💠 7+ Years Experience | Senior Architect specializing in scalable backend architecture and high-load PHP Laravel Developer ecosystems 💠 AI Strategist | Building AI-powered and AI-assisted workflows, integrating AI solutions for custom SaaS products and No-Code/Low-Code integrations 💠 Rapid MVP Delivery | From concept to production-ready launch in 4-6 weeks as a Full Stack Laravel Vue specialist 💠 Proven Track Record | 100% Job Success with 5-star feedback from enterprise and startup clients in the USA, Europe, and the UAE Hello to my future clients and collaborators! I'm Mike - a Senior Full Stack Laravel Vue Developer and Laravel Developer. As a Laravel consultant and Laravel expert specializing in AI-powered SaaS and Fintech, I build modern web applications combining powerful Laravel backend with clean Vue.js and React interfaces built with HTML5, CSS3, and Bootstrap. I also work with WordPress for content-driven platforms and Ruby on Rails for rapid application development. MY DEVELOPMENT JOURNEY Early in my career, I focused on mastering PHP, clean architecture, security and performance, and the Laravel ecosystem, including WordPress and Ruby on Rails projects. Today, as a PHP Laravel Developer, I lead complex projects using Laravel full stack, Vue, React, and Node-based APIs, delivering scalable and secure applications supporting real business growth. Whether it's a SaaS platform, admin panel, WordPress site, or integrating APIs-driven product, I work as a Laravel Developer who understands both business logic and technical scalability. All code is versioned with Git. WHAT I HELP WITH: 1️⃣. Laravel & Full Stack Web Development I'm a Full Stack Laravel Vue developer who builds everything from Laravel codebase to modern JavaScript interfaces, including WordPress themes and Ruby on Rails applications. As a PHP Laravel Developer and Laravel backend specialist, I specialize in: — Advanced Laravel development with Livewire, Filament, and Symfony — Frontend with Vue.js, React, Alpine.js, Tailwind CSS, Bootstrap, and CSS3 — WordPress custom themes, plugins, and CMS solutions — Ruby on Rails rapid application development — Clean architecture, security and performance-focused PHP — MySQL, PostgreSQL, MariaDB integration — Scalable backend architecture for long-term growth 2️⃣. RESTful & GraphQL API Development As a Laravel Developer and Laravel expert, I build robust backend API systems: — RESTful & GraphQL APIs with Laravel — Backend API and third-party services integrations for modern web applications — WebSockets for real-time Laravel platforms — Stripe integration, Firebase, Google Drive, integrating AI solutions via OpenAI API 3️⃣. SaaS Architecture As a Full Stack Laravel Vue developer, I design scalable and secure applications that scale: — Existing Laravel codebase modernization and extension — Multi-tenant architecture and multi-tenant SaaS dashboards — WordPress multisite and Ruby on Rails SaaS solutions — API-first architecture for React, Vue, and Node frontends 4️⃣. Performance & Code Quality As a Senior PHP Laravel Developer, I focus on: — Optimizing code for performance in Laravel and Ruby on Rails — MySQL and PostgreSQL database tuning — Frontend speed for React and Vue — WordPress performance optimization — Clean architecture, security and performance 5️⃣. Admin Panels & Back-Office Systems As a Laravel Developer, I build modern admin panels that help teams run operations smoothly with dashboards built with HTML5, CSS3, Bootstrap, and jQuery. I also deliver WordPress admin customizations and Ruby on Rails back-office solutions. I can help with: — Filament/Livewire admin panels with role-based access — Custom workflows, approvals, audit logs — PDF reports, analytics views, and operational dashboards 6️⃣. E-commerce, Payments & Subscription Systems If your business relies on payment gateway, subscription product, or checkout flows, I deliver as a Full Stack Laravel Vue expert who understands the full product lifecycle, including WordPress WooCommerce and Ruby on Rails e-commerce solutions: — Stripe integration, subscriptions, invoices, and webhooks in PHP Laravel Developer stack — Customer portals and secure checkout with HTML5 and CSS3 — Integrating APIs-first payment systems compatible with React and Vue Full Stack Specialist in Fintech, Payments, API Integration, Stripe, Payment integration, Payment Gateway, Wallets, API development, Checkout, Saas Fintech, Financial Services, Fintech Platform and Fintech SaaS MVP

I help founders, CTOs, and engineering teams design software that survives growth. For more than 25 years I've been building complex software systems—from embedded hardware and low-level programming to large-scale distributed platforms serving thousands of devices and processing financial transactions. My role is rarely "just writing code." I help companies make the architectural decisions that determine whether a product scales, remains maintainable, and avoids expensive technical debt. Selected Experience ✔ Designed and architected distributed infrastructure managing thousands of geographically distributed IoT devices under continuous production load. ✔ Reduced blockchain operating costs by approximately 90% by redesigning TRON energy management and transaction strategy, resulting in six-figure annual savings. ✔ Built secure financial infrastructure for cryptocurrency payment processing, wallet management, accounting, and settlement systems. ✔ Designed custom cryptographic protection that prevented a significant financial loss where conventional security mechanisms proved insufficient. ✔ Led architecture decisions across projects involving fintech, crypto infrastructure, payment systems, high-load backend services, and hardware integration. Areas of Expertise Software Architecture • Distributed Systems • Microservices Architecture • Domain-Driven Design (DDD) • Event-Driven Architecture • High-Load Backend Systems • Scalability & Performance Engineering • Architecture Reviews • Technical Due Diligence • Legacy Modernization AI & Intelligent Systems • AI Platform Architecture • LLM Integration • OpenAI / Claude / Gemini APIs • AI Agent Workflows • MCP Integrations • RAG Architecture • Workflow Automation FinTech & Crypto • Payment Platforms • Stripe & Custom Payment Gateways • Blockchain Integration (TRON, Bitcoin, USDT) • Wallet Infrastructure • Double-Entry Accounting • Financial Transaction Processing Infrastructure • Node.js / TypeScript • NestJS • PostgreSQL • Redis • RabbitMQ • Docker • Linux • IoT Platforms • Cisco & MikroTik Networking • Asterisk VoIP How I Work I usually join projects when: • a startup needs a solid architecture before scaling; • an existing platform is becoming difficult to maintain; • performance problems appear under production load; • technical debt is slowing product development; • founders need an experienced architect rather than another developer. Whether the engagement lasts a few hours for an architecture review or several months as a technical lead, my objective is always the same: Build systems that continue to work when your business grows.