Hire the Best Node.js Developers
in Ukraine

Clients rate our Node.js developers
Rating is 4.7 out of 5.
4.7/5
Based on 2,113 client reviews
Bohdan S.

Poltava, Ukraine

$35/hr
5.0
2 jobs

"He took our legacy SaaS codebase from 520K lines down to 80K. 400% speed boost in development velocity, with zero downtime for our 5000+ users.", โ€” Founder of EdTech Platform ๐Ÿ† Senior Full Stack Developer | 6+ years in Next.js, Node.js, React, Laravel and AI SaaS โœ… ABOUT ME 8+ years and 45+ products delivered as a Senior Full Stack Developer specializing in Platform, MVP, AI-Powered and Web Application delivery on Next.js and Node.js. $4.2M+ client impact and $1.1M+ direct revenue as a Senior Full Stack Developer working across React, Next.js and Node.js. 22,000+ active users across Web + Mobile products where React frontend paired with Node.js backend lifted engagement by 18-27%. 12,000+ users across Fintech and Payments platforms where a Senior Full Stack Developer's Next.js ownership cut reconciliation time by 40%. 2,600+ completed orders, 520+ registered customers in an Ecommerce and CRM Platform MVP delivered as a Senior Full Stack Developer on Next.js. 90% faster order processing, 80% lower manager workload through workflow automation and React improvements as a Senior Full Stack Developer on Node.js. 1,800+ catalog items, 4-role access, 2.8x operational capacity in a B2B SaaS Marketplace built as a Senior Full Stack Developer on Next.js and Node.js. 5-8 weeks shorter MVP-to-pilot launch, 35% fewer bugs through codebase stabilization and SaaS productionization work as a Senior Full Stack Developer. $1.1M+ in client revenue as a Senior Full Stack Developer on Next.js and React, 8+ years as a Node.js engineer. 18-27% engagement lift, 30-40% faster cycles, cleaner UX and stronger retention as a Senior Full Stack Developer on React, Next.js and Node.js. As a Senior Full Stack Developer, I treat every build as a long-term SaaS asset, not a one-off delivery. โœ… WHERE I DELIVER As a Senior Full Stack Developer on React - 20+ SaaS systems with UI development, dashboards and responsive builds across SaaS Platform, Booking Platform and Ecommerce SaaS products. As a Senior Full Stack Developer on Next.js - 15+ SaaS launches, 30-40% faster iteration through design-to-code and component work. As a Senior Full Stack Developer on Node.js - 25+ end-to-end SaaS builds with backend APIs, data architecture and secure, scalable systems from early-stage MVP to live SaaS Platform. As a Senior Full Stack Developer across React and mobile app builds - UI polish and mobile improvements boosting conversion by 15-22% on SaaS products. 10+ deployed mobile SaaS apps in the App Store and Google Play as a Senior Full Stack Developer. 12-19% better repeat usage through booking, notifications and payments on SaaS platforms built as a Senior Full Stack Developer. As a Senior Full Stack Developer with Python and Django experience - 12+ backend-heavy SaaS products, 28% lower delivery risk. As a Senior Full Stack Developer - 6-18 month cycles scaling existing SaaS platforms as a long-term partner, holding 99%+ delivery consistency across distributed SaaS teams on React, Next.js and Node.js. โœ… INDUSTRY IMPACT Marketplace, B2B SaaS - 55,000+ active listings, 20%+ better lead quality and a 35% increase in conversion rates as a Senior Full Stack Developer on React and Next.js handling $2.3M+ in monthly SaaS transaction volume. Fintech SaaS, Payment Orchestration, PSP Integrations - 12,000+ transactions processed daily, 500+ merchant accounts onboarded, 25%+ faster settlement and 15% fewer failed payments as a Senior Full Stack Developer maintaining 99.9% SaaS uptime on Node.js. AI-Powered SaaS - 6+ products deployed, custom AI agents, RAG chatbots, OpenAI and Claude API integrations as a Senior Full Stack Developer on React and Node.js, processing 16,000+ daily prompts and cutting query time by 40%. Logistics SaaS, ERP - up to 12 hours saved per order cycle, 30%+ faster reporting and a 40% reduction in data-entry errors across 5+ regional hubs as a Senior Full Stack Developer on Next.js. Fintech SaaS, PropTech SaaS, LegalTech SaaS - 18% better adoption, 40% higher retention over 6 months and structured permissions managing 5,000+ users as a Senior Full Stack Developer on React. โœ… HOW I BUILD 25+ SaaS products as a Senior Full Stack Developer on React: React Native, Next.js, TypeScript, JavaScript, HTML5, CSS3, Tailwind, Responsive Design. 15+ SaaS systems as a Senior Full Stack Developer on Node.js: PostgreSQL, MySQL, MongoDB, Firebase, Stripe, integrations across payment, maps, auth and third-party APIs. 10+ SaaS ecosystems as a Senior Full Stack Developer: WordPress, Shopify, PHP, Flask, Python, Django, MERN stack on Next.js and Node.js. 40+ SaaS products as a Senior Full Stack Developer: Git, software architecture, front-end development with an engineer's mindset applied to every SaaS Platform I ship. Let's turn your idea into a scalable product with your Senior Full Stack Developer.

  • Node.js
  • JavaScript
  • MongoDB
  • Web Application
  • React
  • Next.js
  • TypeScript
  • Full-Stack Development
  • Web Development
  • API Development
  • React Native
  • PostgreSQL
  • SaaS Development
  • Tailwind CSS
  • PHP
  • Supabase
  • Front-End Development
  • CSS
  • HTML
  • API
Mykola P.

Rivne, Ukraine

$30/hr
4.9
103 jobs

๐Ÿš€ ๐€๐ง๐ฒ๐จ๐ง๐ž ๐œ๐š๐ง ๐ ๐ž๐ง๐ž๐ซ๐š๐ญ๐ž ๐€๐ˆ ๐œ๐จ๐๐ž. ๐๐ฎ๐ญ ๐ˆ ๐ฆ๐š๐ค๐ž ๐ข๐ญ ๐ฌ๐ž๐œ๐ฎ๐ซ๐ž, ๐ซ๐ž๐ฅ๐ข๐š๐›๐ฅ๐ž, ๐ฌ๐œ๐š๐ฅ๐š๐›๐ฅ๐ž, ๐š๐ง๐ ๐ฉ๐ซ๐จ๐๐ฎ๐œ๐ญ๐ข๐จ๐ง-๐ซ๐ž๐š๐๐ฒ. ๐Ÿ”ฅ 85+ completed projects (40+ SaaS & MVP platforms) delivered as a Full Stack Developer & React Developer ๐Ÿ’ฐ Startup MVP platforms generated $500K+ revenue in their first 6 months ๐Ÿ‘ฅ SaaS products supporting 10Kโ€“50K active users built by an expert Full Stack Developer ๐Ÿ“ˆ One platform grew from 2K to 7K users through continuous product updates by a Web Developer โšก Backend systems processing 300Kโ€“500K API requests every month ๐Ÿš€ Startup MVPs delivered in 2โ€“4 weeks (complex Startup MVP delivered in just 2 days by a Full Stack Developer) โฑ๏ธ Optimized AI dashboard loading times from 2 minutes down to 3 seconds for 10Kโ€“50K active users ๐ŸŽฌ Video generation architecture supporting a heavy load of several thousand concurrent users ๐Ÿ“Š 5+ years building SaaS platforms & Startup MVPs as a professional Full Stack Developer ๐Ÿ“ฆ 100+ API integrations completed across production systems by a Full Stack Developer โš™๏ธ 20+ backend architectures designed from scratch for Mobile App Developer projects ๐Ÿง  AI integrations across 30+ commercial projects as a React Developer & Full Stack Developer ๐Ÿ’ผ I help founders build SaaS platforms, Startup MVPs, AI applications, Customer Portals, Marketplaces, and scalable Web Applications using React, Next.js, Node.js, Supabase, PostgreSQL, Stripe, Redis, and AI APIs as a Full Stack Developer. ๐Ÿ› ๏ธ As a SaaS Developer, MVP Developer, Full Stack Developer, Software Developer, React Developer, WordPress Developer, Mobile App Developer, and Web Developer, I've delivered 85+ production projects (40+ SaaS & MVP platforms). As a Full Stack Developer, I help startups validate ideas, launch products in 2โ€“4 weeks (complex MVP platforms in 2 days), and scale apps supporting 10Kโ€“50K active users with $500K+ revenue milestones. ๐Ÿš€ Many companies hire me as a SaaS Developer, MVP Developer, Full Stack Developer, Startup Developer, React Developer, WordPress Developer, Mobile App Developer, Web Developer, and AI SaaS Developer. As a Full Stack Developer, I build products designed to scale. Systems I've developed as a Full Stack Developer process 300Kโ€“500K API requests monthly, integrate 100+ APIs, support 10Kโ€“50K active users, and grow years after MVP launch, generating $500K+ revenue. ๐ŸŽฏ Unlike many Software Developers, WordPress Developers, or basic Web Developers, I focus on the entire product lifecycle as a Full Stack Developerโ€”from MVP planning to production infrastructure, subscription systems, customer portals, and SaaS scalability. Whether you need a Full Stack Developer and React Developer for an AI dashboard or a Mobile App Developer for a cross-platform release, I deliver results. ๐Ÿ† Why Founders Hire Me as a SaaS Developer & Full Stack Developer: 5+ years working as a SaaS Developer, MVP Developer, React Developer, WordPress Developer, Mobile App Developer, Web Developer, and Full Stack Developer. As a Full Stack Developer, I delivered 85+ projects, including 40+ SaaS & MVP platforms supporting 10Kโ€“50K active users. Startup MVP delivered in 2โ€“4 weeks (complex MVP platforms in 2 days) by an expert Full Stack Developer. Production-ready products supporting 10Kโ€“50K active users after launch designed by a Full Stack Developer. One Startup MVP built by a Full Stack Developer generated $500K+ revenue during its first 6 months. One SaaS platform grew from 2K to 7K users through feature releases managed by a Full Stack Developer. Backend systems processing 300Kโ€“500K API requests every month created by a Full Stack Developer. 100+ API integrations (Stripe, Supabase, OpenAI, CRMs, payment gateways) completed by a Full Stack Developer. As a Full Stack Developer, I optimized AI dashboard loading times from 2 minutes down to 3 seconds for 10Kโ€“50K users. Built high-load video generation systems supporting several thousand concurrent users as a Full Stack Developer. Redis optimization reducing database load by 70%+ on high-traffic SaaS platforms supporting 10Kโ€“50K active users. React performance optimization improving Lighthouse scores to 90+ and reducing bundle sizes by 40%+ as a dedicated React Developer and Full Stack Developer. Experience building subscription platforms, customer portals, internal business systems, marketplaces, admin dashboards, WordPress Developer setups, Mobile App Developer integrations, and multi-tenant SaaS applications as a Full Stack Developer. Production architecture designed by a Full Stack Developer to support years of growth and generate $500K+ revenue. ๐Ÿ“ˆ ๐Ÿš€ Startup Growth & Production Software with a Full Stack Developer As a SaaS Developer, MVP Developer, React Developer, Web Developer, WordPress Developer, Mobile App Developer, and Full Stack Developer, I help founders launch complex MVPs in 2 days and build scalable software capable of supporting 10Kโ€“50K users and generating $500K+ revenue.

  • Node.js
  • JavaScript
  • Web Application
  • React
  • HTML
  • Angular
  • Python
  • CSS
  • SaaS
  • Git
  • Software Development
  • WordPress
  • MySQL
  • Bootstrap
  • PHP
  • Web Design
  • CSS 3
  • HTML5
  • Vue.js
  • Full-Stack Development
Yuliia U.

Zaporizhzhia, Ukraine

$35/hr
4.7
47 jobs

๐Ÿ‘‹ Hi, I'm Julia - your reliable tech partner โœ… 9+ years in software development โœ… 41+ jobs on UpWork โœ… 155+ web and mobile projects delivered โœ… 20,500+ Upwork hours in React / Next.js / Node.js / React Native โœ… 75% repeat clients - partnerships lasting 6-18+ months โœ… 40+ MVPs released, 5-8 weeks from MVP to pilot launch โœ… 35+ in-house engineers, matching in 24 hours or less โœ… 2-week trial period - you risk nothing โœ… Products we support include platforms with 5M+ daily users My team helps companies hire in-house, CTO-approved engineers who join fast, take ownership, and deliver production-ready software. My goal: save up to 40% of your budget and still get a market-ready, stable, scalable product. Why teams choose us: ๐Ÿ”น In-house, not freelance-marketplace roulette. Every engineer is personally screened and approved by our CTO before joining your project. ๐Ÿ”น Speed without chaos. Engineer matched within 24h, weekly demos, code review and QA on every delivery. ๐Ÿ”น Ownership. Our engineers don't wait for tickets - they flag risks, suggest architecture improvements, and drive the product forward. ๐Ÿ“Œ How we work: Discovery & technical planning โ†’ engineer matching within 24h โ†’ 2-week trial โ†’ weekly demos and reports โ†’ CTO-approved delivery with code review and QA โ†’ long-term support after launch. ๐Ÿš€ React / Next.js / Full Stack We build SaaS platforms, marketplaces, dashboards, admin panels, CRMs, and scalable web apps as react developer, react js developer, nextjs developer, next js developer, web app developer react, full stack developer react node, and full stack developer supabase react. Stack: React, Next.js, Node.js, TypeScript, Supabase, PostgreSQL, Firebase, MongoDB, REST API, GraphQL, Stripe, OAuth, WebSockets, AWS, Vercel, Docker. MVP development, legacy code takeover, architecture modernization, Core Web Vitals, API integrations, payments, auth, subscriptions, user roles, production launch. A strong fit if you need a react developer, frontend developer react, web developer, full stack developer, mern developer, or backend engineer. ๐Ÿ“ฑ React Native / Mobile iOS and Android apps as react native developer, react native developer expo, react native app developer, mobile app developer. React Native, Expo, Firebase, Supabase, Node.js, API-driven architecture. App takeover, maintenance, push notifications, App Store / Google Play releases, payments, backend integrations. Mixed environments: flutter developer, android developer. ๐Ÿค– AI SaaS / AI Development 25+ AI products and features shipped: AI SaaS, AI MVP, AI chatbot development, AI agent development, RAG chatbot, copilots. Stack: OpenAI API, Claude API, LLMs, RAG, prompt engineering, Generative AI, Python, FastAPI, pgvector, web scraping, automation, AI workflow validation. ๐Ÿงฉ Mixed-Stack Support Core focus: React, Next.js, Node.js, React Native, TypeScript, Supabase, AI. We also support wordpress, vue, angular, python developer, scala developer, and other web/mobile technologies. ๐Ÿ† Industries ๐Ÿ“ฆ Logistics - 5+ projects: tracking, shipment dashboards, carrier/shipper workflows, maps ๐Ÿฅ HealthTech - 4+ projects: medical booking, clinic platforms, patient flows ๐Ÿ›’ Marketplaces & E-commerce - 15+ projects: multi-vendor, Stripe, subscriptions, bidding, complex search ๐Ÿ  PropTech - 5+ projects: listings, booking flows, agent dashboards, rental platforms ๐Ÿค– AI Startups - 25+ products: chatbots, agents, copilots, OpenAI / Claude integrations ๐Ÿ’ฐ FinTech - 3+ projects: Stripe Connect, billing, payment flows, invoicing ๐ŸŽฎ Gaming - 5+ projects, incl. 2 major global gaming brands: dashboards, analytics, real-time ๐Ÿ“š EdTech - 5+ projects: student dashboards, progress tracking, content platforms ๐Ÿ“ฃ MarTech - 1 global market-leading project: analytics, segmentation, workflows โšฝ SportsTech - 10+ projects: live data, events, rankings, stats, mobile apps ๐Ÿš€ Building a SaaS, MVP, marketplace, React app, Next.js platform, React Native app, or AI product? Click "Invite" or "Hire" - I'll help you clear the estimate or discovery phase within 24 hours or less.

  • Node.js
  • JavaScript
  • jQuery
  • MongoDB
  • React
  • HTML
  • CSS
  • Bootstrap
  • Front-End Development
  • TypeScript
  • Redux
  • React Native
  • Next.js
  • Web Development
  • Supabase
  • Stripe
  • Full-Stack Development
  • Software Development
  • AI Development
  • Redux Saga
Anton M.

Sofiyivska Borschagivka, Ukraine

$40/hr
5.0
96 jobs

Hi, Iโ€™m a senior full-stack developer and product-minded engineer. I operate as a Full Stack Developer who thinks in terms of business value rather than just tickets. Over the last decade, I've led and coded complex web products for clients across Europe, the US, and the UK. As a Full Stack Developer and Backend Developer, I partner with founders, product owners, and marketing leaders who need a reliable technical partner to build SaaS platforms, CRMs, marketplaces, mobile apps, and high-performance websites. My work covers the full spectrum of Full Stack Developer responsibilities. As a Backend Developer, I architect scalable APIs and database structures using PHP (Laravel), Node.js, and Python. On the frontend, I build with React, Vue, and Angular. This Full Stack Developer versatility extends to React Native for mobile, where I function as a Mobile App Developer, and to custom WordPress solutions, where I serve as a WordPress Developer. Whether it's a Python Full Stack Developer scenario with Django/FastAPI or a .NET Full Stack enterprise environment, I adapt. โš™๏ธ What I Do Best Full Stack Developer ownership from architecture to launch and support. Backend Developer focus on SaaS platforms, booking engines, and internal tools. Full Stack Developer React Node ecosystems: interactive dashboards and complex workflows. WordPress Full Stack builds that are fast, secure, and easy for marketing teams to edit. Mobile App Developer delivery via React Native, fully integrated with custom backends. Senior Fullstack Developer guidance for integrations: CRMs, ERPs, payment gateways, and custom APIs. ๐Ÿš€ Real Project Examples ๐Ÿ“ฆ Self-Storage Ecosystem (EU) As lead Full Stack Developer and Backend Developer, I built a booking tool with ERP and payment automation (Full Stack Developer Laravel stack with Vue). This Full Stack Developer work took online reservations from zero to 170+ monthly and tripled signed contracts. ๐ŸŽ“ EdTech Matching Platform As Senior Fullstack Developer, I delivered three interconnected applications (Laravel/Vue) with a matching engine and accounting integrations. The Full Stack Developer React Node architecture increased sales by 190% year-over-year while keeping operations lean. ๐Ÿพ Social Utility App for Pet Owners Acting as both Mobile App Developer and Backend Developer, I built a React Native app and Laravel backend with maps, social features, and AI helpers. This Full Stack Developer project seamlessly blended native mobile and web. ๐Ÿ“Š SEO Analytics SaaS In a Python Full Stack Developer role, I designed microservices with FastAPI and Node.js for high-load APIs and React frontends. The Full Stack Developer architecture processes thousands of active users reliably. ๐Ÿงน Cleaning Service Group Automation As a WordPress Developer and Full Stack Developer PHP expert, I built a custom CRM/ERP with scheduling and telephony integrations. The Web Developer and Backend Developer work automated coordination across three brands. ๐Ÿ›  Tech I Use Daily Backend: PHP (Laravel, Filament), Node.js, Python Frontend: React, Vue, Nuxt, Alpine.js CMS: Custom WordPress Full Stack themes and plugins Mobile: React Native (I function as a Mobile App Developer) DB: MySQL, PostgreSQL, Redis DevOps: AWS, Docker, CI/CD APIs: Stripe, Mollie, Google API, OpenAI ๐Ÿค How I Work โœ… I own delivery as a Full Stack Developer: architecture, code quality, and deadlines. โœ… I'm transparent about scope and risks as your Backend Developer partner. โœ… I take Full Stake ownership of outcomes, not just outputs. โœ… I can join ongoing projects or build from zero to scale. โœ… I act as a Web Developer and Senior Fullstack Developer who bridges technical execution with business impact. ๐Ÿ’ก Why Clients Choose Me as Their Full Stack Developer Beyond writing clean code, I function as a true Full Stack Developer consultant. I've rescued stalled projects, modernized legacy PHP systems, and transitioned businesses from manual spreadsheets to fully automated WordPress Full Stack portals. As a React Developer at heart, I ensure every interface is intuitive and fast. Whether you need a Mobile App Developer for a companion app or a Backend Developer to untangle complex data flows, I bring Full Stack Developer React Node expertise and a Full Stake mindset to every engagement. My experience across .NET Full Stack environments and as a Python Full Stack Developer ensures I can evaluate the right tool for your specific business challenge, not just the one I know best. I'm comfortable acting as a fractional CTO or a Senior Fullstack Developer embedded with your existing team. As a Full Stack Developer and Backend Developer, I deliver React, Node.js, PHP, Mobile App Developer results, WordPress Developer sites, Python Full Stack Developer APIs, .NET Full Stack insights, and Full Stake commitment. Senior Fullstack Developer ready.

  • Node.js
  • JavaScript
  • Web Application
  • PHP
  • React
  • API
  • Laravel
  • HTML
  • API Integration
  • CSS 3
  • Software Development
  • HTML5
  • Git
  • MySQL
  • Web Design
  • API Development
  • Database Architecture
  • Mobile App Development
  • Bootstrap
  • Django
Mykhailo D.

Lviv, Ukraine

$39/hr
4.9
86 jobs

โญ๏ธFounders come to me after a freelancer disappeared mid-project. I finish what they started, and I don't ghost. ๐Ÿ’ก 130+ production-grade products shipped (SaaS, MVPs, AI systems, marketplaces) ๐Ÿ’ฐ $16.5M+ revenue generated for client products ๐Ÿ‘ฅ 160K+ active users powered by systems I built โšก 1M+ API requests/month at 99.9% uptime ๐Ÿš€ MVP โ†’ production in 2โ€“6 weeks, built to scale from day one ๐Ÿ”ฅ WHAT I DO Building a SaaS, MVP, or AI-powered product? You need a Full Stack Developer who owns React frontend and Node.js backend end-to-end, ships in weeks (not quarters), and writes code your future team won't throw away. That's what I do. Early-stage MVP, productionizing a prototype, scaling a live SaaS platform, or rebuilding a legacy codebase โ€” I've done it on React, Next.js, Node.js, TypeScript, Supabase, PostgreSQL, AWS for over 10+ years. ๐Ÿ”ฅ ROLES I TAKE ON (10+ YEARS EXPERIENCE) โœ” Full Stack Developer / Full Stack Engineer โ€” 40+ end-to-end SaaS platforms (React + Node.js), 10+ years โœ” Frontend Developer / Front-End Developer โ€” 30+ production UI builds, 10+ years โœ” React Developer / React.js / ReactJS Developer โ€” scalable React apps since 2015, 10+ years โœ” Node.js / NodeJS Developer / Backend Developer โ€” 25+ APIs, 1M+ req/month, 10+ years โœ” Vue.js Developer / Nuxt.js Developer โ€” 8+ Vue projects, 8+ years โœ” Next.js Developer / NextJS Developer โ€” 15+ SSR/SSG SaaS platforms, 7+ years โœ” TypeScript Developer / JavaScript Developer โ€” 50+ typed and untyped JS codebases, 10+ years โœ” SaaS Developer / Web App Developer โ€” MVP to scale, 10+ years โœ” Lead Frontend Engineer / Senior Full Stack Engineer โ€” led 18+ projects ๐Ÿ”ฅ INDUSTRIES I SERVE โš–๏ธ LegalTech founders โ€” 6+ Case Management Systems, Document Workflows, Client Portals, Compliance SaaS ๐Ÿฅ Healthcare & MedTech โ€” 8+ Patient Platforms, Telehealth, HIPAA-Compliant data, Clinic Management SaaS ๐Ÿ“ฆ Logistics & supply chain โ€” 5+ Logistics Platforms, real-time tracking (sea/air/truck), Project44, INTTRA, EDI ๐Ÿ›’ Marketplace & e-commerce โ€” 15+ Multi-Vendor Marketplaces, B2B & Two-Sided Marketplace, Stripe, bidding, complex search ๐Ÿค– AI startups โ€” 12+ AI-Powered products: OpenAI / Claude API / LLM, RAG Chatbots, AI Agent Platforms, vector DBs, FastAPI, browser extensions ๐Ÿ“ No-code & enterprise SaaS โ€” 10+ Form Builders, Admin Dashboards, Internal Tools, Microservices, Multi-tenant ๐ŸŒ Media, AdTech & publishing โ€” 6+ Publisher Platforms, CMS, payment gateways, Analytics Dashboards ๐Ÿ  Real estate & PropTech โ€” Property Listings, Bidding & Auction systems, Agent Dashboards ๐Ÿ’ฐ FinTech founders โ€” Stripe Connect, subscription billing, multi-currency, KYC, Fintech MVP ๐Ÿ“š EdTech โ€” course delivery, student dashboards, progress tracking, live sessions ๐Ÿ”ฅ RESULTS I DELIVER โœ” MVP โ†’ production in 2โ€“6 weeks, 35% fewer bugs, 5โ€“8 weeks shorter delivery cycle โœ” Frontend: LCP under 1.5s, Lighthouse 90+, bundle size cut 40%, 18โ€“27% engagement uplift โœ” Backend: 1M+ API requests/month, 99.9% uptime, 40โ€“60% lower latency โœ” Database: 3โ€“5x faster response, 70% less DB load; 90% faster workflows, 65% fewer back-office actions โœ” +30% conversion on React / Next.js apps; 15โ€“22% better marketplace lead quality โœ” 15,000+ shipment operations/month, 2,400+ completed orders, 30,000+ healthcare users โœ” 20+ SaaS MVPs launched, 47% fewer bugs after legacy modernization ๐Ÿ”ฅ HOW I WORK I think like a product engineer, not a code-monkey. Before writing a line, I align on the business outcome โ€” who the user is, what they pay for, where the product needs to be in 6 months. Then I ship in weekly demos and stay available on Slack / Telegram for fast turnaround. Typical cycle: 1๏ธโƒฃ Discovery & scoping (2โ€“3 days) โ€” define MVP boundary 2๏ธโƒฃ Architecture โ€” clean foundations, scalable schema, right stack 3๏ธโƒฃ Weekly sprints with demos โ€” steady progress every week 4๏ธโƒฃ Production launch โ€” CI/CD, monitoring, error tracking 5๏ธโƒฃ Post-launch support โ€” most clients keep me on ๐Ÿ”ฅ TECH STACK Frontend: React.js, ReactJS, React Hooks, Next.js, NextJS, Vue.js, Nuxt.js, TypeScript, Redux, Zustand, Tailwind CSS, shadcn/ui Backend: Node.js, NodeJS, Express.js, NestJS, Python, FastAPI, REST, GraphQL, WebSockets Database: PostgreSQL, Supabase, MongoDB, MySQL, Redis, Prisma Supabase: Auth, Row-Level Security, Edge Functions, Realtime, Storage AWS: Lambda, S3, RDS, EC2, CloudFront, API Gateway, SQS, SNS, Cognito, ECS Other cloud: Firebase, Vercel, Netlify, Cloudflare AI / ML: OpenAI API, Claude API, LangChain, RAG, RAG Chatbot, AI Agent, Computer Vision Payments: Stripe Subscriptions, Stripe Connect, Stripe Checkout, Stripe Billing, PayPal Integrations: Twilio, SendGrid, Resend, Slack API, Telegram Bot API, EDI, Project44 Mobile: React Native, React Native Expo, iOS / Android ๐Ÿš€ Building a SaaS, MVP, marketplace, or AI-powered product? Click "Invite" or "Hire" and send the brief.

  • Node.js
  • JavaScript
  • jQuery
  • MongoDB
  • HTML
  • React
  • CSS
  • HTML5
  • Bootstrap
  • CSS 3
  • Vue.js
  • Nuxt.js
  • Front-End Development
  • Next.js
  • Redux
  • TypeScript
  • React Native
  • React Bootstrap
  • Python
  • Software Development
Eugene T.

Kyiv, Ukraine

$40/hr
5.0
28 jobs

Senior Full-Stack Engineer with 19+ years, 750K+ users, $30M+ processed for 1,800+ organizations ๐Ÿซต ๐—ช๐—›๐—”๐—ง ๐—ฌ๐—ข๐—จ ๐—š๐—˜๐—ง โœ”๏ธ As a full stack developer React Node I ship SaaS platforms used by 750K+ users. โœ”๏ธ As a React developer I build dashboards, analytics, and React frontends serving 130K+ signups, raising activation by 25%. โœ”๏ธ As a front end developer I architect component systems across 1,800+ organizations, lifting engagement 18โ€“27%. ๐Ÿ”ฅ ๐—”๐—–๐—›๐—œ๐—˜๐—ฉ๐—˜๐— ๐—˜๐—ก๐—ง๐—ฆ โœ”๏ธ 19+ years and 100+ projects as a full stack developer React Node across SaaS Platform, MVP, and Event Management delivery. โœ”๏ธ 750K+ users and 1,800+ organizations in production, with 1.5M+ interactions and $30M+ processed as a React developer and front end developer. โœ”๏ธ 130K+ signups delivered as a React developer building auth, dashboards, and payments, raising signup completion by 35%. โœ”๏ธ 10+ years shipping multi-tenant products as a SaaS developer and full stack developer React Node. ๐Ÿšš ๐—ช๐—›๐—˜๐—ฅ๐—˜ ๐—œ ๐——๐—˜๐—Ÿ๐—œ๐—ฉ๐—˜๐—ฅ โœ”๏ธ As a full stack developer React Node I built NFL FLAG Youth Sports, an Event Management Platform serving 750K+ participants with registration, ticketing, scheduling, and analytics, cutting registration time by 45%. โœ”๏ธ As a React developer I built University Athlete Recruitment, a multi-tenant SaaS matching 130K+ athletes with matching algorithms, RBAC, reaching 92% match accuracy. โœ”๏ธ As a front end developer I built SportWrench, an Event Management Platform with scheduling, ticketing, and updates at 100% performance compliance, handling 50K+ concurrent users. โœ”๏ธ As a full stack developer React Node I architect SaaS, Stripe Connect split payments, and real-time analytics, onboarding tenants 60% faster. โœ”๏ธ As a React developer I build trade show software, conference management, and booth booking with Stripe Connect across 1,800+ organizations, processing $30M+. โœ”๏ธ As a React developer I build high-load check-in handling 1,000+ QR badge scans per hour, cutting check-in queues by 70%. โœ”๏ธ As a front end developer I build SSR/SSG frontends in Next.js, improving load speed by 50%. โœ”๏ธ As a front end developer I build engagement tools, lifting member engagement by 40%. โœ”๏ธ As a React developer and MERN stack developer, MERN developer, and full stack MERN engineer, I deliver SaaS development on MERN and MERN stack architecture, shipping MVPs in 4โ€“6 weeks. โœ”๏ธ As a Full-Stack Developer, Full Stack Developer, fullstack developer, fullstack web developer, and Full-stack dev, I deliver Association Management Software (AMS) with member portals, dues management, CE credits, and certification workflows, automating 80% of admin work. โœ”๏ธ As a React web developer, React js developer, full stack React developer, and full stack developer React, I build SSR/SSG platforms, cutting checkout drop-off by 30%. โœ”๏ธ As a front end developer React, front end web developer, Front End Web Developer, Front End Website Developer, front end engineer, and front end designer, I deliver UI development, dashboards, and responsive UI, with 99.9% UI uptime. โœ”๏ธ As a Shopify front end developer, front end developer Next.js, angular front end, front end angular developer, and front end developer vue, I build storefronts, Next.js frontends, and Angular and Vue migrations, improving conversion 15โ€“22%. โœ”๏ธ As a React Native developer, React Native mobile app developer, and mobile app developer, I build React Native mobile apps for booking, notifications, and payments, with 12โ€“19% better repeat usage. โœ”๏ธ As a Python developer and Python full stack developer, I build Django backends and automation across distributed teams, including React developers Ethiopia setups, cutting delivery risk by 28%. โœ”๏ธ As a SaaS developer and web developer, I deliver react developer firebase integrations, Wordpress full stack builds, full stack developer PHP and full stack developer Laravel work, and WordPress developer customizations, with 99%+ delivery consistency. โœ”๏ธ Hired as a Senior Full-Stack Developer, Senior Full Stack Engineer, Senior Full-Stack Software Engineer, Senior React Developer, Senior Backend Engineer, Backend Developer, Integration Engineer, Full-Stack Engineer, Frontend Developer, Front-End Developer, and Front end Developer across 6โ€“18 month engagements. โš’๏ธ ๐—›๐—ข๐—ช ๐—œ ๐—•๐—จ๐—œ๐—Ÿ๐—— โœ”๏ธ Frontend: React, react js, Java React, frontend React, TypeScript, Redux, JavaScript, HTML, HTML5, CSS, CSS3, Bootstrap, React Bootstrap, jQuery, and Responsive Design, with deep front end development and Front-End Development practice. โœ”๏ธ Backend: Node.js, backend nodejs, PHP, Python, SQL, MongoDB, and PostgreSQL, delivered as a Node.js developer and Backend Developer. โœ”๏ธ Frameworks & CMS: Next.js, NestJS, Vue.js, Angular, Laravel, .NET full stack, WordPress, Shopify, and Webflow. โœ”๏ธ Practice: Software Architecture & Design, Software Development, Agile Software Development, Software Design, Software Debugging, Git, Web Design, and Desktop Application work with a UX designer mindset.

  • Node.js
  • JavaScript
  • jQuery
  • HTML
  • PHP
  • React
  • WordPress
  • Bootstrap
  • HTML5
  • CSS
  • CSS 3
  • Web Design
  • Vue.js
  • Angular
  • SQL
  • Python
  • Git
  • Desktop Application
  • Software Design
  • Agile Software Development

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