Experienced and passionate CTO, VP of Engineering, tech lead, and serial entrepreneur. Fractional CTO/Tech lead that supports you, your project, and your company in every timezone. Get help with architecture, development, team management, DevOps, building decentralized load-balanced infrastructure, and everything in between. 👌 Expertise in: - Team building and training - Software development methodologies - Financial services, transaction processing, card issuance and management - Banking APIs, payment services integrations, SEPA, IBAN - Disaster recovery - General consulting on Open Source, Web Apps, Servers, backend, micro-services, horizontal scaling, high-load, DevOps, OpSec - Planning architectures for future websites/apps/servers aligned with business goals 📈 Achievements: - Scaled software development company from 30 to 200 developers ensuring all teams can work in parallel with TOP performance (2024-2025) - NeoBank: Built team, guidelines, compliant infrastructure, and launched modern banking application from 0 to issuing cards to users within 9 months; Went through Visa and MasterCard accelerators (2022-2024) - IT Consulting services: Built efficient team that follows strict security and best practices guidelines (since 2016) - Deep-tech SaaS: Built team and service with globally distributed CDN (HL, HA) (since 2015) - Government services app: Managed team, built guidelines and compliant software for the GovTech that used by 1m+ daily users (2013) - Live-streaming service: Built team, infrastructure, and video service (VoD & RTMP) used by 2 millions simultaneous users (2012) 👷‍♂️ DevOps: - Horizontally scaled and distributed infrastructures - Co-located bare-metal servers, Web-servers, Could - High-load, high-availability, and cross-border infrastructure - Databases & Linux web servers clusters, shards (horizontal and vertical scaling) - Custom automated deployments & backups - Consultancy about protection against DDoS, hacks, and other attacks 👨‍🏫 Mentorship (for individuals and companies): - Education - Project/Team mentorship - Pair-programming - Code-review - Guidelines and best-practices application - Project planning - Architecture planning 🎙 Speaker: - Meteor Impact 2025 - Meteor Impact 2020 - DeveloperWeek 2019 🤝 Social & Open Source: - GitHub: @veliovgroup - GitHub: @dr-dimitru - NPM: @dr.dimitru - Atmosphere/Packosphere: @ostrio - StackOverflow: @dr-dimitru - Twitter: @smart_egg

Need someone to take technical ownership of your product, not just complete development tickets? I work with founders and product teams as a Fractional CTO, Technical Lead, and Software Architect, helping them assess existing systems, resolve technical risks, and lead the next stage of product development. I can help with: • Technical audits of codebases, architecture, and infrastructure • Taking over existing products and development workflows • Architecture and modernization roadmaps • Production stability, performance, and scalability • Code reviews and deployment process improvements • Technical planning and development team leadership • Hands-on development with Node.js, React, MongoDB, and MeteorJS My background combines technical leadership with hands-on experience building and maintaining production platforms. I focus on identifying what needs to be fixed now, what can wait, and how to move forward without unnecessary rebuilding. If you need a senior technical partner to evaluate your current product, create a clear action plan, and lead implementation, let’s discuss your situation.

Struggling to build a scalable web app that doesn’t break under real users? I help startups and businesses build fast, secure, and production-ready MEAN/MERN applications using React, Node.js, and MongoDB so you can focus on growth, not bugs. ✅ What you get: Clean, scalable full-stack architecture Fast and responsive React frontends Secure and optimized Node.js APIs Reliable MongoDB database design 💼 Proven Results: Built a change management system used by enterprise teams Developed backend systems handling complex survey workflows Delivered multiple 5⭐ projects with 100% client satisfaction ⚙️ My Process: Understand your business goal Design a scalable architecture Develop with clean, maintainable code Test + optimize performance Deploy & support 🎯 Whether you need: Full web app development Backend APIs Bug fixing or scaling existing apps I’m here to help. 👉 Send me a message and let’s discuss your project.

🏆 𝟏𝟓 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 || 🥇 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝑵𝒆𝒆𝒅 𝒂 𝒔𝒆𝒏𝒊𝒐𝒓 𝒆𝒏𝒈𝒊𝒏𝒆𝒆𝒓 𝒕𝒐 𝒃𝒖𝒊𝒍𝒅 𝒐𝒓 𝒔𝒄𝒂𝒍𝒆 𝒚𝒐𝒖𝒓 𝒘𝒆𝒃 𝒐𝒓 𝒎𝒐𝒃𝒊𝒍𝒆 𝒂𝒑𝒑? I help startups and businesses turn ideas into scalable, production-ready SaaS products. With 15 years of experience, $300K+ earned on Upwork, 8,960+ hours delivered, and a 100% Job Success score, I've shipped high-quality solutions for startups and growing companies worldwide. I work across health tech and ad tech. I built React Native features for Yas.life, a health-tech app live on the App Store and Google Play, and I'm currently the lead engineer at AppIQ (ad tech), where I own the architecture of a data-driven platform that optimizes marketing funnels with ML-powered A/B testing, built on a Cloudflare edge stack and custom data pipelines. What I can help you with: ✔ Full-stack SaaS development (React, Next.js, Node.js, NestJS, TypeScript, PayloadCMS, Meteor) ✔ Mobile apps (React Native, Flutter) with native iOS/Android builds and store releases ✔ Cloudflare architecture (Workers, Queues, KV, R2) and scalable data pipelines ✔ AI-enabled features and AI-first development (Claude, OpenAI, Gemini; I build with Claude Code and Cursor) ✔ API development and third-party integrations ✔ Scaling, refactoring, and hardening existing applications Proven experience: • Built and scaled multiple SaaS platforms, from MVP to production • Sole technical decision-maker and lead engineer at an ad-tech startup • Long-term collaborations, consistent 5-star feedback, and repeat clients Tech stack: React, Next.js, React Native, Node.js, NestJS, TypeScript, GraphQL PostgreSQL, MongoDB, ClickHouse, Cloudflare (Workers/Queues/R2/KV), AWS, Firebase, Docker Flutter, PayloadCMS, Meteor, Tailwind, Redux, Jest / Vitest / Playwright How I work: I focus on clear communication, clean architecture, and reliable, maintainable code, with tests and CI as defaults. Whether you're starting from scratch or improving an existing system, I build for long-term success. I use AI seriously in my workflow while reading and standing behind every line that ships. 𝑳𝒆𝒕’𝒔 𝒅𝒊𝒔𝒄𝒖𝒔𝒔 𝒚𝒐𝒖𝒓 𝒑𝒓𝒐𝒋𝒆𝒄𝒕. 𝑰 𝒂𝒎 𝒂𝒗𝒂𝒊𝒍𝒂𝒃𝒍𝒆 𝒂𝒏𝒅 𝒓𝒆𝒂𝒅𝒚 𝒕𝒐 𝒉𝒆𝒍𝒑.

Why Work with Me? With over 113 successfully delivered projects, 7,100+ hours logged, and $200,000+ earnings, I bring deep technical mastery and a client-first mindset. My mission: deliver stellar outcomes and earn back the Top Rated Plus badge. Core Strengths Full-Stack Expertise: Node.js, Laravel, React, Vue, Angular, RESTful APIs. DevOps & Backend Scalability: AWS, Docker, CI/CD (GitHub Actions), NGINX, PM2. Database Proficiency: MySQL, MongoDB, schema optimization, high-performance tuning. Best Practices: Test-driven development, maintainable code, automated deployments. Proven Track Record 5.0-rated projects in AWS, CloudCompute, full-stack redesigns, DoS defense, and MySQL upgrades. Consistently praised for reliability, technical acumen, and responsiveness. How I Work Proactive Planning: Clear deliverables, timeline alignment, thoughtful execution. Reliable Communication: Weekly or real-time updates, transparent collaboration, aligned with EST/New York time. Quality Delivery: Clean, future-proof code and a problem-solving mindset focused on your success. Let’s Build Your Next Success Story I’m selectively accepting new clients to give full attention and deliver exactly what you need—whether launching your first Upwork project or optimizing an existing system. I’m committed to earning your 5-star review. Next Step? Send me a quick message or calendar link to jump on a free call. Let’s align on goals, share ideas, and get your project off to a stellar start.

Hi there! I'm an independent freelance developer with over 7 years of experience building high-quality web applications. I specialize in crafting robust, scalable, and maintainable solutions that meet real-world business needs. Clean code, thoughtful architecture, and long-term maintainability are my priorities in every project. I’m currently open to long-term collaboration opportunities where I can bring value as a dedicated, full-stack developer. 👨🏻‍💻 My Skill Set 🔧 Backend Development Languages & Frameworks: Node.js (Express, NestJS, MeteorJS), Python (Django, Flask, FastAPI), PHP (Laravel), Golang (Gin, Fiber, Echo) Databases: MongoDB, MySQL, PostgreSQL APIs: REST, GraphQL DevOps & Cloud: AWS, Ansible, Terraform, Bash scripting 🎨 Frontend Development Frameworks: React (Redux, Redux Saga, Redux Thunk, Zustand, ImmerJS, Redux Persist, Provider), Next.js, Gatsby.js, Vue.js UI & Styling: HTML5, CSS3 (Sass, Less, SCSS), TailwindCSS, Bootstrap, Material-UI Languages: JavaScript, jQuery Others: GraphQL 🛍️ eCommerce & CMS Shopify WordPress Magento (v1 & v2) Let’s build something great together. I’m passionate about working on meaningful products and establishing long-term partnerships.

I’m a Senior Full Stack Developer with 18+ years of experience building scalable, reliable, and production-ready web applications. My core expertise includes Python, Node.js, React.js, Vue.js, Next.js, AWS, DevOps, and AI integrations, with strong experience in REST APIs, system design, databases, third-party integrations, MCP (Model Context Protocol), and cloud deployment. What I can help you with: * Python / Node.js backend development * React.js / Vue.js / Next.js frontend development * REST API development and third-party API integration * MCP (Model Context Protocol) integrations and AI-related development * TypingMind customization and integrations * MongoDB, MySQL, and PostgreSQL * AWS, Docker, Jenkins, Git, and CI/CD * System architecture and database design * Background jobs, scheduled tasks, and data processing * Payment gateway and WhatsApp API integration * Existing application maintenance, debugging, and performance optimization * Code review and technical guidance I have worked on projects across FinTech, e-commerce, gaming, education, digital platforms, and real-time data applications, and have experience working directly with international clients. I believe in clear communication, clean code, practical solutions, and delivering what the client actually needs. I can take ownership of a project from requirement analysis and system design through development, testing, deployment, and ongoing support. If you have an existing application that needs improvement, a new project that needs to be built, or a technical problem that needs solving, I’d be happy to discuss it with you.

My background is M.S. in electronic and IT. I've managed several startups and worked in numerous fields such as: military, aeronautics, Saas, software and mobile development, computer graphics, digital cinema, 3D content, video animation, computer security, computer forensics, managed service provider, lean startup... I'm fluent in English and French native speaker, but any projects allow me to enhance my knowledge. I've delivered web and mobile apps based on MeteorJS framework, VulcanJS/GraphQL, react and react-native UI (including inApp purchase). I've had many radio shows, advertising and voice-over in French. I pass the HSK2 Chinese exam and still studying Chinese because I have a personal interest in martial arts such as tai ji chuan/qi gong. I can be very reactive as I manage my time and deliver quickly if it is required. But as a careful craftsman, the more time you give, the better the result should be. For translation, I don't want to correct "google translated" work, just give me the original text in plain English.

At Apiko, we’ve been building digital products for over 10 years and delivered 60+ projects. What we’ve learned is simple: success comes from creating products people actually use and love. We never deliver something that doesn’t bring real value. We start with a proper discovery stage to understand your goals, challenges, and vision. This ensures your product is ready before we write a single line of code. To help even more, we offer free add-ons like workshops with our Business Analyst, concept design previews, and app review audits. Using technologies like React, React Native, Node.js, and GraphQL, we offer: • Software development from idea to maintenance • Dedicated engineering teams • MVP development • UX/UI design • Quality assurance and testing We also provide advanced AI solutions, including GPT and chatbot development. And once your product is live, we don’t just disappear—we stick around with maintenance and support to keep it growing and performing at its best.

I help startups, founders, and growing businesses turn AI ideas into production-ready products, intelligent agents, and automated business systems—shipping in weeks instead of months. As a Full Stack Lead & AI Solutions Architect with 7+ years of experience, I specialize in building AI-native applications, multi-agent systems, workflow automations, and scalable SaaS platforms that deliver measurable business outcomes. Whether you're launching an AI startup, automating operations, building an AI copilot, or creating internal business tools, I can take your idea from concept to production. 🔹 WHAT I BUILD → AI Agents & Agentic Systems Custom AI agents powered by OpenAI, Claude, Gemini, LangGraph, CrewAI, MCP, RAG pipelines, vector databases, and enterprise knowledge systems. → AI Automation & Business Operations End-to-end automations using n8n, Make, Zapier, APIs, webhooks, and custom integrations that eliminate repetitive work and streamline operations. → AI-Powered SaaS Platforms Multi-tenant SaaS applications with AI copilots, conversational interfaces, document processing, knowledge retrieval, and intelligent workflows. → Internal Tools & AI Operations Platforms Custom dashboards, CRM systems, lead management platforms, AI-powered back-office tools, and operational automation systems. → Full-Stack Product Development Modern web and mobile applications built with React, Next.js, Node.js, NestJS, TypeScript, PostgreSQL, Supabase, and cloud infrastructure. 🔹 AI EXPERTISE ✔ AI Agents & Multi-Agent Systems ✔ RAG (Retrieval-Augmented Generation) ✔ MCP (Model Context Protocol) ✔ AI Workflow Automation ✔ Conversational AI ✔ AI Copilots ✔ Knowledge Base Systems ✔ Vector Databases ✔ Document Intelligence ✔ Voice AI & AI Assistants ✔ LLM Integrations (OpenAI, Claude, Gemini) ✔ Prompt Engineering & AI Orchestration 🔹 RECENT PROJECTS → AI Customer Support Platform with automated ticket handling and knowledge retrieval → AI Lead Qualification System that automates prospect research, enrichment, and CRM updates → Multi-Agent Business Operations Platform coordinating workflows across multiple departments → AI-Powered Content & Social Media Automation System generating, reviewing, and publishing content autonomously → SaaS Products integrating AI copilots, chat interfaces, document analysis, and workflow automation 🔹 TECHNOLOGY STACK AI & Agents: OpenAI, Claude, Gemini, LangGraph, CrewAI, MCP, LangChain, Vector Databases, RAG, AI Orchestration Automation: n8n, Make, Zapier, APIs, Webhooks, CRM Integrations, Business Process Automation Frontend: React, Next.js, TypeScript, TailwindCSS Backend: Node.js, NestJS, Express, GraphQL, REST APIs Cloud & Data: AWS, Azure, Supabase, PostgreSQL, MongoDB, Firebase, ElasticSearch 🔹 WHY CLIENTS WORK WITH ME → Strong Engineering Foundation — Not just prompts and no-code tools. Production-grade architecture and scalable systems. → AI-First Thinking — I design products around AI capabilities rather than simply adding AI features. → Rapid Delivery — Move from idea to working product quickly using AI-augmented development workflows. → Business-Focused Execution — Every solution is designed to reduce costs, increase efficiency, or unlock new revenue opportunities. → End-to-End Ownership — Product strategy, architecture, development, deployment, and ongoing optimization. If you're looking for someone who can architect, build, and launch AI-powered products, autonomous workflows, intelligent agents, or scalable SaaS platforms, let's connect. I can help you validate ideas, build MVPs, automate operations, and create AI solutions that deliver real business value.