Most businesses today are stuck in the same situation: no consistent flow of clients, money is spent without clear results, you constantly have to train and push team members, and in the end, everything depends on you. I'm honestly tired of seeing this. Because I've been there too. I'm an entrepreneur. And after 10+ years in business development, one thing is clear: there are no universal solutions. Every business is different. And if a team doesn't go deep into your niche, your clients, your market - it won't work. That's why I built my own approach. I brought together strong specialists who don't just "do tasks" but actually understand the core and goals. We go into your business, build the system around it, and take the headache off you, so you don't have to explain everything, find people, and control every step.
I HELP WEB2 (FINANCE, SAAS) AND WEB3 COMPANIES
Raise money. Build products. Launch correctly. Scale.
With a real team and real accountability.
You don't get a freelancer.
You get a delivery unit with responsibility for results from real experts with 5+ years in their niche.
✦ WHAT YOU GET
[ Business development & investment attraction ]
Business model, positioning, pitch deck, business plan, financial model, tokenomics.
→ Result: investors understand you and are ready to talk.
[ Marketing, sales funnels & growth ]
B2B / B2C / B2B2C strategy, funnels, content, social, referral systems.
→ Result: users, leads, and revenue — not just activity.
[ Product ownership & turnkey execution ]
Product vision, roadmap, specs, execution by internal team (dev, design, AI, Web3).
→ Result: your product gets built and launched without chaos.
[ Web3 & technical delivery ]
Smart contracts, tokenomics, market-making logic, audit prep.
→ Result: your Web3 product survives after launch.
[ AI optimisation & automation ]
Claude, GPT, MCP servers, APIs, no-code agents.
→ Result: faster execution, lower costs.
What clients achieve with me:
- $10.5M+ raised through clear investor positioning and pitch decks
- $500K+ qualified investor leads generated for Web3 projects
- ROI up to +700% on selected growth and product cases
- 90%+ client conversion rate
- +30% product satisfaction after fixing product logic, UX, and funnels
- 1500 qualified leads in 3 months for B2B
Are you in the process of creating something really cool and impactful?
I help Web2 (finance, SaaS) and Web3 companies raise money, build products, launch correctly, and scale – with a real team and real accountability.
✦ HOW WE WORK
→ One specific area (product development, business development, marketing, Automation)
→ Full turnkey: from brand to launch to investment
→ Project-based or advisory
→ I also take over broken projects: when the previous team didn't deliver
Are you building something cool and impactful?
Message me. Tell me where you're stuck.
I'll be straight with you about whether and how we can fix it.
No pitch. No templates. Just a real conversation.
Copywriting
Article
Business Presentation
Investment Research
Business
Market Analysis
Real Estate
Pitch Deck
Startup Pitchbook
Business Plan Writing
Writing
Blockchain, NFT & Cryptocurrency
Finance
SEO Writing
WordPress
Mykhailo K.
Lviv, Ukraine
$30/hr
5.0
13 jobs
I help SaaS startups, founders, and agencies build fast, scalable Webflow websites from Figma designs — with clean CMS structure, responsive layouts, SEO-ready pages, and conversion-focused design.
My 5+ years of experience combining development and UI/UX thinking will help you get the best website ever!
𝗜 𝗦𝗣𝗘𝗖𝗜𝗔𝗟𝗜𝗭𝗘 𝗜𝗡:
✅ Figma to Webflow development
✅ Webflow CMS websites
✅ Landing pages for SaaS, startups, and service businesses
✅ Webflow redesigns and website migrations
✅ UX/UI improvements & conversion optimization
✅ Website performance & SEO optimization
✅ Responsive Webflow development
✅ Webflow animations and interactions
✅ On-page SEO, performance optimization, and launch support
My focus is not just making websites look good. I build Webflow websites that are easy to manage, fast to load, simple to scale, and structured to turn visitors into leads or customers.
💎 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 𝗠𝗘:
— 200+ websites delivered across SaaS, startups, and growing brands
— 5+ years of experience in web design, UX, and development
— Clean Webflow builds — not messy templates
— Strong communication and fast turnaround
— Experience working with clients across the US, UK, and EU
💡 𝗠𝗬 𝗣𝗥𝗢𝗖𝗘𝗦𝗦
1️⃣ Understand your goals, audience, and offer
2️⃣ Review or create the page structure in Figma
3️⃣ Build a clean, responsive Webflow website
4️⃣ Set up CMS, forms, SEO basics, and integrations
5️⃣ Test, optimize, and launch
📈 𝗥𝗘𝗦𝗨𝗟𝗧𝗦 𝗙𝗥𝗢𝗠 𝗠𝗬 𝗪𝗢𝗥𝗞:
— Increased sign-ups and conversions after redesigns
— Faster websites with better user engagement
— Cleaner structure → easier scaling and content management
𝗘𝘃𝗲𝗿𝘆 𝘀𝘁𝗲𝗽 𝗶𝘀 𝗳𝗼𝗰𝘂𝘀𝗲𝗱 𝗼𝗻 𝗿𝗲𝗮𝗹 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗿𝗲𝘀𝘂𝗹𝘁𝘀 — 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝘃𝗶𝘀𝘂𝗮𝗹𝘀.
🚀 𝗟𝗘𝗧’𝗦 𝗕𝗨𝗜𝗟𝗗 𝗔 𝗪𝗘𝗕𝗦𝗜𝗧𝗘 𝗧𝗛𝗔𝗧 𝗪𝗢𝗥𝗞𝗦
📩 Message me to discuss your project
📚 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 & 𝗞𝗘𝗬𝗪𝗢𝗥𝗗𝗦
Webflow Developer, Webflow Expert, Webflow Designer, Webflow Development, Webflow Website, Custom Webflow Website, Figma to Webflow, Webflow CMS, Webflow CMS Development, Webflow CMS Architecture, Webflow Landing Page, Webflow Redesign, Webflow Migration, Webflow Maintenance, Webflow Support, Webflow Bug Fixes, Webflow Animation, Webflow Interactions, Webflow Ecommerce, Responsive Webflow Design, Mobile-First Webflow, Webflow SEO, Webflow On-Page SEO, Webflow Performance Optimization, Webflow Page Speed, Webflow Core Web Vitals, Webflow Custom Code, JavaScript for Webflow, HTML, CSS, Webflow Integrations, Webflow Forms, Webflow API Integration, Webflow CRM Integration, Webflow Zapier Integration, Webflow HubSpot Integration, Webflow CMS Collections, Webflow Dynamic Pages, Webflow Blog, Webflow Membership, Webflow Localization, Webflow Accessibility, Webflow QA Testing, Webflow Website Optimization, Webflow Conversion Optimization, Webflow SaaS Website, Webflow Startup Website, Webflow Agency Website, Webflow Corporate Website, Webflow Portfolio Website
Webflow
Web Development
Web Design
Figma
Website
Landing Page
CSS
HTML
JavaScript
UX & UI
CSS 3
HTML5
WordPress
PHP
No-Code Development
React
Adobe Photoshop
CMS Development
Adobe XD
Graphic Design
Vladyslav K.
Dnipro, Ukraine
$45/hr
5.0
38 jobs
Is your blockchain product ready for real users, or is it a prototype that breaks under live transactions? Most Web3 projects fail at the boundaries between smart contracts, wallets, trading operations, and backend systems.
🏆 20+ years architecting production systems at principal engineer level
📊 $200K+ earned on Upwork across 32 architecture projects
🎯 100% Job Success Score, Top Rated Plus on Upwork
⚡ 11 years architecting Fintech / Trading / Accounting solutions
⚡ 8 years architecting blockchain products across Bitcoin, EVM, Solana ecosystems
💼 CEO at Osambit, a 20-person engineering team
✅ Enterprise Blockchain Architect certified, former Sr Principal Engineer at Nordstrom
⭐⭐⭐⭐⭐ "We've had the opportunity to collaborate with the Osambit team, and it's been a great experience. They're highly professional, responsive, and truly understand the final goal. Their technical expertise and ability to deliver on time have been key to the success." (Alwyn V., IXO World)
As a Blockchain Architect with 20+ years of production engineering experience and two years focused on Web3, I design blockchain and fintech products that operate reliably beyond a demo. I work across Solana and EVM networks—including Ethereum, Polygon, Base, BSC, and Arbitrum—as well as enterprise platforms such as Hyperledger Fabric and Besu. My work connects secure smart-contract, wallet, payment, and remittance flows with the backend systems, operational controls, and user experiences a real product needs. Every engagement starts with architecture: chain selection, custody and transaction boundaries, compliance-aware workflows, failure modes, scalability, and security. That architecture-first approach helps blockchain and neobanking products withstand live usage, not just testnet scenarios.
🔶 Centralized exchange: architecture for trading operations, wallet flows, and reliable backend integration
🔶 Custodial wallets: secure custody, transaction handling, and multi-wallet platform architecture
🔶 Trading automation system: real-time blockchain-integrated trading workflows with operational safeguards
🔶 Liquidity automation system: DeFi and liquidity-management automation across Solana and EVM ecosystems
🔶 Fintech, neobanking & remittance apps: payment, account, wallet, and cross-border transfer architecture
🔶 Bitcoin mining facility control panel: operational dashboard and control-system architecture for mining infrastructure
🔶 Blockchain-integrated game: NFT features, token and wallet integrations, and production-ready game backend design
🔶 Enterprise blockchain solutions: permissioned-network architecture and public-chain integrations using Hyperledger Fabric or Besu
🔶 Nordstrom (Sr Principal Engineer, 5 years): architected 9+ enterprise systems | led 10 offshore engineering teams | supply chain, payment, logistics domains
WHAT I DO
✅ Blockchain Architecture: chain selection, system design, security boundaries, and production rollout planning
✅ Solana Development: Rust programs, SPL standards, RPC integrations, and high-throughput DeFi systems
✅ EVM & Smart Contracts: Solidity development and integrations for Ethereum, Polygon, Base, BSC, and Arbitrum
✅ Wallet & Custody Systems: custodial wallet architecture, secure transaction handling, and multi-wallet integrations
✅ Fintech, Neobanking & Remittance: payment flows, account and wallet systems, cross-border transfers, and operational controls
✅ DeFi, Trading & Liquidity Automation: trading workflows, liquidity systems, DEX integrations, and operational controls
✅ NFT & Tokenized Products: NFT minting, metadata, marketplace and royalty logic, and blockchain-integrated game features
✅ Enterprise Blockchain: Hyperledger Fabric and Besu solutions, permissioned-network architecture, and API or oracle integrations
✅ Full-Stack Web3 Platforms: React interfaces, Node.js or Python backends, web3 integrations, and real-time transaction services
✅ Production Infrastructure: AWS, Docker, Kubernetes, CI/CD, observability, automated testing, and scalable data systems
WHO I WORK WITH
🎯 B2B and B2C companies building blockchain products, fintech and neobanking apps, exchanges, wallets, DeFi platforms, or games
🎯 Founders and CTOs who need Web3, payment, or remittance systems running in production with real users and real assets
🎯 Teams with multi-week engagements (4+ weeks minimum), not 5-minute tasks
🎯 Companies that understand blockchain architecture is a system design and security problem, not just a smart-contract problem
🎯 Clients who value senior engineering judgment over the cheapest hourly rate
MY PROCESS
1️⃣ Architecture Review: 24-hour turnaround on an initial system map, risk review, and scope estimate for your blockchain or fintech product. Close collaboration with business and deep domain immersion.
2️⃣ Design: chain selection, smart-contract, wallet, payment, and remittance boundaries, backend integration, and security plan
3️⃣ Build: production blockchain or fintech
Cryptocurrency
Blockchain
Ethereum
Bitcoin
Blockchain Architecture
Smart Contract
Blockchain Development
Web Development
JavaScript
Python
Node.js
API
React
Blockchain, NFT & Cryptocurrency
Tokenomics
Amazon Web Services
Solana
Decentralized Exchange
PHP
Trading Automation
Oleg K.
Kyiv, Ukraine
$125/hr
4.9
76 jobs
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.
Software Architecture & Design
Cloud Architecture
Network Design
NestJS
API Development
Node.js
React
API
TypeScript
JavaScript
Web Development
NodeJS Framework
Artem H.
Kamyanske, Ukraine
$4/hr
5.0
2 jobs
Profile Summary
Motivated freelancer with strong interest in international remote work. Skilled in communication,
crypto trading, and AI-assisted content creation. Fast learner, ready to adapt to new tools and
deliver results on time. Looking to build a successful freelancing career on Upwork and contribute to
global projects.
FreeBASIC
Dimitriy G.
Ivano-Frankivsk, Ukraine
$30/hr
5.0
36 jobs
When you hire me, you’re working with a Senior full stack developer who delivers production-ready full stack applications built with React, Next.js, and Node.js.
My clients consistently receive SEO-optimized, scalable, and maintainable full stack web applications, including:
- SaaS platforms built with React, Next.js, and Node.js
- User dashboards and admin panels using React developer best practices
- Custom CRM and CMS platforms with backend Node.js
- E-commerce marketplaces powered by React Node architecture
- AI agents and AI modules integrated into MERN stack systems
- 3D configurators using React, Three.js, and React Node
- High-impact animated marketing websites built with React NextJS
- Web3 applications with React, Node.js, and blockchain integration
Every project is engineered as a full stack development solution, frontend React, backend Node.js, and scalable database architecture.
👨💻 ABOUT ME — SENIOR FULL STACK MERN DEVELOPER
I’m a Senior Full Stack Developer with 7+ years of professional experience specializing in the MERN Stack, React, Next.js, Node.js, and modern backend systems.
As a MERN stack developer, I build architecturally complex, server-side rendered full stack web applications that prioritize speed, SEO, scalability, and clean UI/UX.
My daily work revolves around:
- React development for dynamic, interactive interfaces
- React NextJS and Next.js for SEO-driven frontend performance
- Backend Node.js APIs for scalable application logic
- End-to-end full stack development using the MERN stack
I don’t just code, I deeply understand business goals, user experience, and long-term scalability. As a React developer and Node.js backend engineer, I translate ideas into reliable full stack web solutions.
✅ WHY CLIENTS TRUST ME AS THEIR MERN STACK DEVELOPER
- ✅ 7+ years of full stack development experience
- ✅ 50+ complex MERN stack projects delivered from scratch
- ✅ Strong background in React, Next.js, and Node.js
- ✅ Master’s Degree in Computer Science
- ✅ A long-term full stack partner, not a one-off freelancer
As a React developer, I care deeply about UI/UX.
As a Node.js developer, I build secure, scalable backends.
As a MERN stack developer, I connect everything into one seamless system.
🚀 WORKING WITH ME, YOU WILL
1. Eliminate technical stress with a reliable full stack developer
2. Get clear, transparent communication throughout your React Node project
3. Receive accurate estimates and zero surprise costs
4. Enjoy on-time delivery across full stack web development
5. Benefit from lightning-fast load times using React NextJS
6. Use proven MERN stack strategies trusted by top SaaS founders
Your product will be built using React, Node.js, and modern full stack development standards — not shortcuts.
🛠️ TECHNICAL EXPERTISE (REACT • NODE • MERN • FULL STACK)
I specialize in Full Stack NextJS and backend NodeJS development with a strong focus on performance, scalability, and UI/UX.
Frontend (React Developer Focus):
- React developer workflows
- UI/UX React interfaces
- Next.js
- Full Stack NextJS
- React TypeScript
- Tailwind CSS, ShadCN, Radix, GSAP
- React Native
Backend (Node.js & MERN Stack):
- Backend NodeJS
- React Node architecture
- Express.js, Nest.js
- MongoDB, PostgreSQL
- Next.js Supabase
- Prisma ORM, Drizzle ORM
- WebSockets, APIs, authentication
Advanced MERN Stack:
- MERN stack development
- Mern stack developer workflows
- React Node integrations
- AI modules (OpenAI, ClaudeAI)
- Headless CMS systems
- Three.js, React Three Fiber
Every solution I build is a full stack web application powered by React, Node.js, and the MERN stack.
💬 LET’S CONNECT
If you’re looking for a Senior MERN stack developer, React developer, or full stack developer who truly understands React Node architecture and backend NodeJS, I’m ready to help.
Send a message with your idea or challenge, I’ll respond quickly with a clear technical plan and roadmap.
📞 Available for calls to discuss your full stack development, React NextJS, or Node.js backend needs.
React
Node.js
JavaScript
TypeScript
MongoDB
Python
HTML
CSS
PHP
React Native
Tailwind CSS
Vue.js
Web Design
Redux
Laravel
WordPress
Bootstrap
MySQL
Software Development
HTML5
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