Hire the Best Nest.js Freelancers
in Ukraine

Hey, I'm an experienced 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 with over 6 years of professional experience. Main technologies stack: ✔ Languages: Javascript, Typescript, PHP. ✔ Frontend: React, Redux, Next.js, Remix, Moralis, Web3.js, Ether.js, Styled Components, Material UI, TailwindCSS, HTML, CSS, and its popular preprocessors SASS/LESS. ✔Backend: Node.js, Express.js, Nest.js, GraphQL, ElasticSearch. ✔Blockchain: Solidity, Move (Aptos). ✔Databases: Mongo, Postgres, MySQL, Firebase. ✔Deployment tools: Docker, Docker Compose. ✔Cloud tools: Amazon, Heroku, Vercel, AWS Amplify. ✔CMS: WordPress, Yii2, Laravel, Modx. ✔Version Control: Git, Bitbucket. I have worked on many different projects and have shown myself to be a responsible developer with strong technical skills. 𝐋𝐚𝐭𝐞𝐬𝐭 𝐫𝐞𝐟𝐞𝐫𝐞𝐧𝐜𝐞 𝐨𝐟 𝐦𝐲 𝐰𝐨𝐫𝐤 𝐲𝐨𝐮 𝐜𝐚𝐧 𝐬𝐞𝐞 𝐛𝐞𝐥𝐨𝐰:

💪 5+ years of experience building web services FROM SCRATCH! 🚀 Working with me means SAVING TIME, STRESS, AND MONEY by eliminating the need to search for a second developer. 😉 Your time is valuable to me, so I handle the entire development cycle: ➕ Front-End; ➕ Back-End; ➕ Deployment to the server; ➕ Application support during operation; ➕ Integration of artificial intelligence (AI) solutions, including OpenAI technologies. To get started, I require: ✅ Your desire to bring your ideas to life; ✅ Project specifications (if available); ✅ UI graphic design (Figma, Photoshop, Adobe XD, etc.); ✨ Everything else - I'll take care of it! I'd like to highlight that I've developed numerous projects from scratch, including: ➕ Internal corporate services; ➕ Investor tools; ➕ E-commerce solutions; ➕ Information portals with stunning animations; ➕ AI-powered applications; ➕ And many others. My technology stack: ➕ JavaScript + TypeScript; ➕ ReactJS + NextJS; ➕ NodeJS + NestJS; ➕ OpenAI API integration. 📞 Please reach out to me, and we can discuss your ideas and the best way to implement them.

I am a Node.js developer with over 15 years of Full-Stack development experience. I've built 220+ web projects. I have 10+ years in Node.js development. Besides, I specialize in SaaS, Dashboards, Healthcare, Marketplaces, MarTech, FinTech, Real Estate, mobile apps, and enterprise software. 🏆 112k+ billed Full-Stack Development 💎 $4m+ earned in Full Stack Development 🥇 Senior full stack developer in React.js Node.js AWS Next.js Nest.js JavaScript Developer 📢 Our client, Eventbrite company, boasting $580M in revenue, said about working with us: "𝗧𝗵𝗲 𝗖𝗹𝗼𝗰𝗸𝘄𝗶𝘀𝗲 𝘁𝗲𝗮𝗺 𝘄𝗮𝘀 𝗲𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝘁. 𝗪𝗲 𝗮𝗿𝗲 𝘁𝗵𝗿𝗶𝗹𝗹𝗲𝗱 𝘄𝗶𝘁𝗵 𝘁𝗵𝗲 𝗳𝗶𝗻𝗮𝗹 𝗽𝗿𝗼𝗱𝘂𝗰𝘁". As a skilled Node.js Developer, I’m proficient in AWS, Serverless, and Microservices, leveraging NestJS and ReactJS to craft scalable systems, and I specialize in building reliable solutions as a Node.js Developer using Vue.js Node.js, NestJS, and React.js. With Nest.js, I build strong server-side apps that have a smart structure and fast API routing. As a Node.js developer, I rely on TypeScript and Nest.js’s detailed docs to write code that’s easy to read and maintain. I also plug in extra Nest.js modules to simplify linking up with databases and outside services, making development quicker and more organized. I'm a skilled Node.js backend JavaScript developer with a focus on Node.js, crafting scalable and efficient server-side solutions. I harness MongoDB alongside Node.js to deliver versatile NoSQL database systems and possess deep knowledge of SQL for overseeing relational databases, ensuring data remains consistent and reliable. ➤ 𝗖𝗹𝗼𝗰𝗸𝘄𝗶𝘀𝗲 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗧𝗲𝗮𝗺 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀 💯 100% Top Rated Plus - 🎯 Top 3% of companies 📢 50% of our clients work with us for over 3 years 💎 84% of our clients strongly recommend our Node.js expertise 🥇 Awarded 'Best Upwork Agency in Dnipro' by Upwork 4 years running 🏆 Named 'Top Ukraine Development Company' by Clutch 3 years in a row 📱💻 310+ successfully completed projects over 10 years with a 4.9🏆 3rd-party rating 👉 𝗪𝗵𝘆 𝗬𝗼𝘂 𝗦𝗵𝗼𝘂𝗹𝗱 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲 𝗔𝘀 𝗬𝗼𝘂𝗿 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 ☑️ Latest Technologies: As a Node.js Developer, I harness Node.js, NodeJS, React, Vue.js, MongoDB, and Angular to build modern, scalable web applications. My expertise in NodeJS ensures your business stays competitive. ☑️ End-to-End Product Development: With comprehensive skills in Node.js for back-end and front-end technologies, I deliver fully integrated solutions as a Node.js Developer. Using NodeJS, I ensure cohesive user experiences and robust performance for faster project delivery. ☑️ Expertise Across Multiple Industries: As a Node.js Developer, I’ve completed projects in MarTech, Real Estate, Logistics, Healthcare, Travel and Hospitality, and FinTech using Node.js. My adaptability with NodeJS tailors strategies to your market. 𝗡𝗼𝘁𝗮𝗯𝗹𝗲 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 ✔ Customized AI chatbot SaaS built with Node.js and OpenAI ✔ Multi-tenant fleet management software powered by NodeJS React Developer ✔ Logistic using Node.js ✔ Fintech solutions with a strong UX focus, developed as a Node.js JavaScript Developer 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗗𝗼 𝗙𝗼𝗿 𝗬𝗼𝘂 𝗔𝘀 𝗮 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 ✔ Develop web apps and websites from scratch using Node.js ✔ Handle client-side and server-side development with NodeJS Backend Developer ✔ AI Chatbot Development | AI Chatbot Developer ✔ Design application architecture tailored to your needs using Node.js ✔ Integrate third-party services (payment systems, Google services, social networks) with NodeJS Full Stack Developer ✔ Optimize high-load apps for speed, scalability, reliability, and security as a Node.js Developer ✔ Write comprehensive unit tests with Node.js for optimal user experiences As a passionate full stack developer Node.js Developer, I embrace new challenges and technologies. If your project requires unfamiliar tools, I’ll master them with Node.JS to deliver results. Have an idea needing skilled implementation? 𝗟𝗲𝘁’𝘀 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝗵𝗼𝘄 𝗺𝘆 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗰𝗮𝗻 𝗯𝗿𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝘃𝗶𝘀𝗶𝗼𝗻 𝘁𝗼 𝗹𝗶𝗳𝗲! 👌

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.

🚀 GET YOUR SAAS MVP PROTOTYPE IN 2 DAYS 🚀 I work as a SaaS MVP Developer and technical partner for founders and startups, helping turn ideas into real SaaS products, SaaS platforms, and SaaS MVP applications built with Next.js / Nextjs. As a SaaS Developer and MVP Developer, I specialize in SaaS MVP development using Next.js and AI integrations. My goal is to help startups validate ideas fast, launch their SaaS MVP, and scale a successful SaaS platform without spending months on development. Over the past years I've built 7+ SaaS platforms and 10+ SaaS MVP products, working as a SaaS MVP Developer for startups and founders. Platforms I helped build are used by 400,000+ active users. My experience includes large SaaS platforms with 1,000,000+ content items, ultra-fast Next.js / Nextjs dashboards loading under 1 second ⚡, and high-converting SaaS MVP products that increased conversion rates by 15–28% 📈. I usually work with founders who need a SaaS Developer or SaaS MVP Developer to build a SaaS MVP, launch a Nextjs SaaS platform, or develop scalable SaaS MVP architecture. 🎯 What I specialize in SaaS platform development • SaaS MVP development • Startup MVP development • Next.js / Nextjs SaaS applications • AI integrations in SaaS platforms • Multi-tenant SaaS platform architecture • AI automation for SaaS MVP products • Real-time SaaS platform applications • End-to-end SaaS MVP development 💡 How I help founders Turn an idea into a working SaaS MVP in 2 days 🚀 Build scalable SaaS platform architecture with Next.js Launch AI-powered SaaS MVP products fast as a dedicated SaaS MVP Developer Reduce time to market for SaaS startups with efficient MVP delivery Avoid costly mistakes during SaaS MVP development by working with an experienced SaaS Developer My work as a SaaS MVP Developer and SaaS Developer helped clients save 40+ hours per month, reduce infrastructure costs by $5,000/month 💰, and grow SaaS platform revenue by $390,000 per year. 🛠 My SaaS MVP development process 📞 Product discovery call for your SaaS MVP or SaaS platform 📌 MVP roadmap and SaaS MVP development strategy 🎨 UI/UX design for your Nextjs SaaS platform 💻 Development of your SaaS MVP using Next.js / Nextjs, Node.js, and AI integrations — handled by a dedicated SaaS Developer 🧪 Testing and optimization of your SaaS platform 🚀 Launch and scaling of your SaaS MVP platform 🗣 Client feedback "Daniil builds SaaS platform functionality with incredible logic and user experience." — Vladislav Zaika "Our idea became a full SaaS platform. Daniil keeps improving our SaaS MVP product constantly." — Dmytro Bliznyuk 💻 Tech stack for SaaS MVP and SaaS platform development Next.js, Nextjs, React, TypeScript, Node.js, NestJS, PostgreSQL, Prisma, GraphQL, MongoDB, Redis, Firebase, AWS, Vercel, AI integrations and scalable SaaS platform architecture everything a professional SaaS MVP Developer needs. ✉️ Let's build your SaaS MVP Write "Hi, I have an MVP idea" and I'll show how we can turn it into a working SaaS MVP prototype with Next.js in just a few days 🚀.

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.