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.

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.

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!

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.

I'm a Java/Spring Boot backend developer with 6 years of experience across CRM, loyalty, and B2B enterprise platforms — the kind of engineer companies bring in when they need someone who can own a backend end-to-end, not just close tickets. ▪️Performance & scale: On a CRM platform for a solar-installation company, I rebuilt the MongoDB query and indexing strategy and cut execution times by 10x or more across reporting, analytics, and core workflows. ▪️Integrations & automation: I've implemented OAuth2 single sign-on so partner dashboards open with one click from inside a CRM, synced schedules via the Google Calendar API, and set up Apache Kafka producers/consumers to move CRM events into async workflows. I've also built a scheduled pipeline that pulls, deduplicates, and standardizes data from a public research API, with no manual cleanup required. ▪️Ownership & delivery: I led an AI-powered CRM analytics feature from concept to production, including the GitHub Actions CI/CD pipeline that deploys it — end to end, without handing off to another specialist. ▪️Legacy & modernization: I'm comfortable in codebases I didn't write. I converted an aging JSP-based Java server into a proper JSON REST API for mobile compatibility. ▪️I spent 19 months adding features to an inherited application (Sweet Home 3D) without breaking what already worked. ▪️I also built resilient HTTP clients in Node.js (proxy rotation, rate limiting, retry logic) when a project calls for it. ✅ Skill: Backend: Java (8/11/17/21), Spring Boot, Spring Data JPA, Spring Security, Hibernate, Apache Kafka Principles: OOP, SOLID, TDD, GOF Design Patterns; Frontend: CSS/HTML, JavaScript/TypeScript; Databases: SQL (PostgreSQL, MySQL), MongoDB; APIs: REST, JSON/XML, Swagger/OpenAPI; Testing: JUnit, Mockito, TestContainers; DevOps: Docker, Maven, Git, GitHub Actions; Top Rated on Upwork, $10K+ earned across 23 contracts and 619 hours, tagged "Clear Communicator" by 4 separate clients. Please tell me what you're building or what's broken, and I'll tell you honestly what it'll take to fix or ship it.

✅ If your project needs scaling and previous developers let you down, I know how that feels because I've rebuilt what they left behind more times than I can count. Message me today and get a free audit of 5 critical points :) 🏆 TOP RATED Developer | 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 💠 50+ SaaS projects delivered, 28 in fintech and payments 💠 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. $10M+ in monthly transaction volume secured as a Senior Full Stack Laravel Developer and PHP Laravel Developer specializing in Fintech, Payments and iGaming platforms built on Laravel and Vue.js. $2,500+ saved per engagement and 25% fewer development hours as a Full Stack PHP Developer and Senior PHP Developer who cut a merchant portal API build from 232 to 176 hours through AI-accelerated delivery. 532,000 to 80,000 lines of code, 5,000+ active users on an EdTech platform rebuilt over 3+ years by a Laravel Developer, with AI-powered lesson summaries and real-time conversational practice. 50,000+ transactions processed daily through a payout microservice built by a Laravel Developer for a Netherlands-based payments company. 28% faster onboarding, dual-sided CRM, real-time matching and billing delivered as a Full Stack Laravel Developer on a staffing/recruitment ERP platform, with a companion Mobile App Developer build for Android users. 52% lower manual reporting workload achieved as a Website Design specialist building a client portal and reporting dashboards for a marketing/SEO agency. 70% faster integration cycles through a unified AI adapter architecture designed by a Laravel Full Stack Developer on an AI-powered video content platform. As a Laravel Developers' collaborator, I treat every Laravel build as a long-term business asset, not a one-off delivery. ✅ WHERE I DELIVER As a PHP Laravel Developer on Laravel Vue.js - 15+ SaaS and marketplace systems with clean architecture, secure APIs and responsive interfaces across Fintech, EdTech and real estate platforms. As a Full Stack Laravel Developer on Livewire and Filament - 10+ admin panels and back-office systems with role-based access and audit logging. As a Full Stack PHP Developer on Stripe and Stripe Connect - subscriptions, invoices and webhook-driven systems processing thousands of transactions daily. As a React Node specialist integrating AI services - OpenAI API, custom AI agents and content-generation pipelines built into production Laravel platforms. As a WordPress Developer and a Ruby on Rails pro - additional delivery paths for content-driven sites and rapid prototyping projects. As a Python Full Stack Developer, plus Android and Mobile App Developer with Flutter Laravel - cross-platform apps built on a Laravel Vue backend. ✅ INDUSTRY IMPACT Fintech, Payments, PSP Integrations - 50,000+ daily transactions and payout automation delivered as a Full Stack Laravel Developer maintaining reliable reconciliation. EdTech, AI-Powered E-Learning - 5,000+ users on a platform rebuilt from the ground up, with AI Zoom summaries and spoken-English models integrated by a Laravel Developer. Real Estate Marketplaces - Laravel, Laravel Vue and Stripe Connect powering a two-sided marketplace with secure checkout and payment splitting. Staffing and Recruitment ERP/CRMs - dispatch, billing and shift verification modules cutting onboarding time by 28% as a Full Stack Developer React. Marketing/SEO Agency Portals - client-facing dashboards cutting manual reporting work by over half as a Senior PHP Developer. AI-Powered Content Platforms - video generation engines, AI content assistants and adapter architectures cutting new AI-provider integration time by 70% as a Full Stack Laravel Developer. ✅ HOW I BUILD 15+ SaaS products as a Laravel Developer: PHP Laravel, Laravel Livewire, Filament, Symfony, Laravel Vue.js, Alpine.js, Tailwind CSS, Bootstrap. 10+ payment and integration systems as a Full Stack PHP Developer: Stripe, Stripe Connect, REST and GraphQL APIs, WebSockets, PHP MySQL, PostgreSQL, MariaDB. 8+ AI builds as a PHP Laravel Developer: OpenAI, custom AI adapters and automated content pipelines. 12+ admin and back-office systems as a Laravel Full Stack Developer: role-based access, audit trails, PDF reporting and analytics.