Oleksandr S.

More than development of YOUR product. You get a meaningful consultation and implementation plan from solution architect with business intelligence. Just send a direct message, no strings attached. 70+ products launched and still generating revenue for their owners today. $400M+ in transactions processed across platforms we built. 100,000+ tickets sold on a ticketing product shipped from zero. 20+ countries reached by an EdTech app delivered end-to-end. I'm not listing what's possible — I'm listing what's already running in production. I run a team of 45+ engineers, designers, and product specialists spread across the EU and Israel, building digital products for startups and growing businesses. Our core focus is fintech: payment platforms, trading and exchange solutions, and secure financial tools - scalable and reliable delivery and support. We cover the full cycle, from product design and UX UI to full stack development, so you work with one team from the first wireframe to a live release. Whether you need a web app, a cross-platform mobile app development, or a SaaS platform built from scratch, we take care of architecture, development, testing, and ongoing support. We work closely with founders, communicate openly, and focus on shipping reliable products that are ready to grow with your business. I'm a full stack developer and software architect based in Israel, and the CEO of a 45+ engineer development agency. When you work with me, you get a senior technical partner who understands the code and the product — and a full team behind delivery when scope requires it. 🔹 Full Stack & SaaS Development Scalable multi-tenant architectures, B2B dashboards, internal tools, and AI-integrated SaaS. We've built white-label platforms processing six-figure transaction volumes, marketing analytics systems pulling from Google, Bing, and Facebook Ads APIs into unified dashboards, and internal CRMs built on microservices and ClickHouse. Core stack: React, Next.js, Vue.js, TypeScript, JavaScript, Python, Node.js, Laravel — full stack web developer depth from database schema to UI. 🔹 Fintech & Banking This is where I'm different from most full stack developers on this platform. We've built card issuing systems, treasury management platforms with multi-signature approval workflows, AML/KYC pipelines, cross-border payment systems with multi-currency accounts, and crypto-to-fiat conversion flows. Live integrations: BlackRock, DocuSign, Salesforce, Rail API, Kraken, SEPA Instant. Production experience, not theoretical — as a full stack developer AI-focused fintech builds also power fraud detection and automated compliance reporting. 🔹 Mobile App Development Native iOS (Swift) and Android (Kotlin) for security-critical applications. React Native for cross-platform. My mobile portfolio includes a hardware-encrypted messenger with a built-in crypto wallet, a DeFi app with decentralized exchange functionality, and a React Native aviation booking system integrated with Salesforce — real-world apps built for real stakes, not UI demos. 🔹 Web3 & Blockchain EVM smart contract UIs supporting no-code multi-chain contract execution, DeFi protocols, hardware-encrypted crypto wallets, seed-to-sale blockchain tracking for regulated goods, and tokenization platforms. 🔹 AI Integration LLM integrations, OpenAI API, RAG pipelines, multi-agent workflow automation, AI-powered analytics, and ClickHouse data infrastructure. As an AI developer I build machine learning and LLM features as a functional product layer — fraud detection, adaptive workflows, automated reporting — not a feature checkbox bolted onto an existing product. When you hire me as your full stack developer, you're not getting a solo freelancer bottleneck. You're getting a senior technical lead with backend, frontend, mobile, and DevOps teams — all behind one point of contact, one contract. Whether you need a full stack web developer for your SaaS platform, a python full stack developer for a data-heavy backend, or a mobile app developer for iOS and Android — one team covers it end-to-end. Tech: Python · Django · FastAPI · React · Next.js · Vue.js · TypeScript · JavaScript · Node.js · Swift · Kotlin · React Native · Flutter · PostgreSQL · MySQL · Redis · ClickHouse · AWS · GCP · Docker · Kubernetes · Solidity · Web3.js Send me a direct message to get a free 30-minute session to map your architecture, align on tech stack, or define your MVP roadmap before development begins.