I’m a software developer and Applied Computer Science student with hands-on experience building production-ready backend and full-stack systems. I specialize in scalable APIs, microservices, and clean system architecture, with a strong focus on backend development. Familiar with using Claude code to enhance productivity while maintaining high quality. During my full-stack developer internship, I built and shipped a real-world microservice for a fleet management company, fully integrated into an existing microservice ecosystem. The service handled real-time Profit & Loss calculations across 50+ expense categories, exposing data via GraphQL APIs and communicating internally using gRPC and Protocol Buffers for high performance and reliability. What I can help you with: Backend API development (REST, GraphQL, gRPC) Microservice architecture & system design Backend services with NestJS Database design & optimization (PostgreSQL, SQL) Full-stack features using Angular + RxJS Performance-focused and clean code solutions Git-based workflows and Dockerized services Technical strengths: Backend: NestJS, Node.js, gRPC, GraphQL, REST APIs Frontend: Angular, RxJS, TypeScript Languages: TypeScript, C++, Python, SQL Databases: PostgreSQL (Sequelize ORM, indexing strategies) Tools: Git, Docker, Linux Beyond web development, I have a strong systems and low-level programming background, including: C++ projects with GPU acceleration using OpenCL Embedded systems with Arduino & microcontrollers Real-time control systems and sensor fusion This background helps me write robust, efficient, and well-structured code, not just “code that works”. How I work: Clear communication and realistic timelines Strong attention to detail Clean, maintainable code Focus on long-term scalability, not quick hacks If you’re looking for a developer who understands both high-level architecture and low-level implementation details, I’d be happy to help bring your project to life. Feel free to message me — I’m always open to discussing your idea or reviewing your requirements.

I am a seasoned frontend developer with over 10 years of experience, specializing in React and building efficient, user-friendly web applications. My expertise extends beyond coding; I provide consulting services that optimize project stacks, enhance infrastructure, and bootstrap development environments. I excel at performance audits, testing strategies, and improving developer efficiency. With a strong focus on TypeScript, I tackle complex coding challenges while mentoring junior developers to foster a collaborative work environment. If you need a reliable partner to elevate your web project or require guidance on best practices, let's connect. I am eager to make your vision a reality while ensuring a smooth development process.

I am entrepreneurial, practical, and thrive on intellectual challenges. I maintain composure in stressful situations, enjoy taking on new initiatives, energetically tackle problems, and possess a sense of humor. My perseverance and result-oriented approach drive me to overcome challenges and deliver impactful outcomes. Throughout my studies, I discovered a particular fondness for core subjects related to security, including system-, software-, and internet security. However, my passion leans more towards the art of programming, where I can seamlessly integrate my skills. I am not only dedicated to security but also driven by a desire to create robust and efficient solutions through programming. I am ready to blend my entrepreneurial mindset and practical approach with my programming prowess, seeking intellectual challenges, and continually striving for progress.

Launching a SaaS platform, mobile app, AI product, or website? I help startups, founders, and product teams uncover bugs, usability issues, confusing workflows, and hidden friction before they impact real users. Unlike traditional QA testers who focus only on finding bugs, I combine quality assurance, usability testing, and product thinking to help improve both product quality and user experience. Over the past several years, I have tested SaaS platforms, mobile applications, fintech products, healthcare systems, HR platforms, AI-powered tools, and marketplace solutions. My goal is not simply to report issues. My goal is to help you launch a product that users trust, understand, and enjoy using. ━━━━━━━━━━━━━━ WHAT I CAN HELP WITH ✓ Manual QA Testing • Functional Testing • Regression Testing • Exploratory Testing • End-to-End User Flow Validation • Smoke Testing ✓ Mobile App Testing • iOS Testing • Android Testing • App Store & Play Store User Experience Review • Cross-Device Validation • Responsive Design Testing ✓ Website & SaaS Testing • Account Registration Flows • Checkout & Payment Processes • Dashboard Testing • Admin Panel Validation • Permission & Role Testing ✓ UX & Usability Audits • User Journey Analysis • Friction Point Identification • Navigation Review • Conversion Funnel Review • UI Consistency Validation • Accessibility Feedback ✓ Product Audits • First-Time User Experience Review • Onboarding Evaluation • Feature Discoverability Analysis • Product Improvement Recommendations • Competitor Benchmarking ✓ API Testing • Postman Testing • Endpoint Validation • Response Verification • Error Handling Review ━━━━━━━━━━━━━━ DELIVERABLES Every project can include: • Detailed Bug Reports • Screenshots & Screen Recordings • Reproduction Steps • Expected vs Actual Results • Severity & Priority Classification • UX Improvement Suggestions • Product Recommendations • Final QA Summary Report ━━━━━━━━━━━━━━ TOOLS Postman Jira ClickUp Trello Notion Figma Chrome DevTools Browser Developer Tools ━━━━━━━━━━━━━━ RECENT PROJECT TYPES • SaaS Platforms • AI Applications • Healthcare Systems • HR Platforms • Fintech Products • Vendor Marketplaces • Mobile Applications • Startup MVPs ━━━━━━━━━━━━━━ WHY CLIENTS WORK WITH ME ✓ Detail-Oriented Testing ✓ Clear Communication ✓ Actionable Feedback ✓ Product-Oriented Thinking ✓ Fast Turnaround ✓ Reliable Reporting Based in the Netherlands and available for both one-time audits and ongoing QA support. Let's find the issues before your users do.

Hi, Weclome to visit my profile. I am highly professional blockchain and web developer who has 10+ years of experience with Solid Leadership skills and unrivaled building skills. - Blockchain * NFT Apps on ETH and BSC and Solana using Solidity and Rust, Go * Smart Contract using ERC 20, ERC 721, ERC 1155 * DeFi , DApp, CEX/DEX - Web * React, Vue, Angular, Node, Redux * Django, Ruby on Rails, .NET

More than five years of experience in Web Development. Strong knowledge of .NET platform with an in depth knowledge of OOP and design patterns. In addition to a proven practical experience in front-end development powered by passion towards open-source and Javascript development worlds. And accomplished MCSD Web Applications certification. With a BS degree in Computer Programming, I have a full understanding of the full life cycle of a software development project. My work history has provided me with much of practical skills primarily in software engineering. I started my career as a junior .Net developer and step by step I enlarged my knowledge of .NET platform to be able to accomplished MCSD Web Applications certification. Following that, I started working with Microsoft latest technologies including MVC, Web API and EF. Along side .Net, I do have the passion towards open-source and Javascript development worlds starting with frameworks like AngularJS passing by front-end tools like gulpJS and webpack till diving into NodeJS and ROR. Beside my technical experience, I contribute to the community through Stackoverflow and github as well as, had the chance during my last working years to learn and practice leadership concepts, the importance of core values, continuous self-improvement techniques. I was exposed to the communication with our USA based clients. I was responsible for the development of a Strategic Management system with exposed me to general management concepts including objectives and goals, projects execution and tracking, measurements and analysis. Have one Golden-Rule when developing "First do it, then do it right, then do it better." Specialties: .Net, Javascript, HTML5, Software Development & Analysis and Database Systems

As a Digital Marketing and UX Designer, I help businesses grow through UX research and user-driven marketing insights. I am passionate about understanding customer behavior and markets and specialize in creating research-backed decisions that optimize user experiences. My experience enables me to deliver customized solutions aligning with business objectives and user expectations. What I Offer: UX Research & Competitor Analysis 🔍 I uncover key insights that inform product development and user-centered designs, from user interviews to usability tests, creating better user experiences. Digital Product Audits & Design 🌐 From full websites to a single page, my background in UX/UI and web design allows me to audit digital products for optimization, efficient, and friendlier experiences. I execute low-fidelity and high-fidelity wireframes, and prototyping using Figma. SEO Audit & Research 🚀 I execute SEO Audit and Research to help optimize digital products and overall positioning in search engines. Synthetized Reporting with Storytelling 📊 I transform research findings into clear, actionable reports that guide strategic decisions. Using visual aids and a consistent storyline, I ensure the insights are easy to digest and apply.

Full-stack JavaScript and Solidity developer with 8+ years of experience in developing responsible and highly scalable web applications. Wesley is adept at understanding the requirements of clients and delivering projects accordingly. He uses latest technologies and modern design patterns to deliver high quality products.

✅ 100% Job Success | 💎 1,000+ Hours on Upwork | 🚀 MVP in Weeks, Not Months Ex-CTO | AI × Next.js / React / Node.js Architect | 19+ Years Shipping at Scale I build production-ready, AI-powered web applications that scale to millions and convert like crazy using Next.js 14 (App Router), React 18 + TypeScript, Node.js microservices, and the latest LLMs (OpenAI, Anthropic Claude, Gemini, Llama 3, Mistral). As former CTO I’ve led teams that delivered real-time lead-generation engines, intelligent marketing platforms, and AI-enhanced SaaS products for Toyota, Unilever, Amazon, Procter & Gamble, The North Face, American Express, and WWF, collectively generating over $1 billion in revenue for clients. What I deliver today (end-to-end, pixel-perfect, 95–100 Lighthouse): - Next.js 14+ apps with Server Components, Server Actions, ISR/SSR, and edge deployment (Vercel + AWS) - AI features: RAG pipelines, agentic workflows, LLM-powered chat/assistants, smart scoring engines, voice agents (ElevenLabs), document intelligence - React + TypeScript frontends with tRPC, React Query, Zod, and Tailwind CSS - Scalable Node.js backends (NestJS/Fastify), PostgreSQL/Prisma, Redis, WebSockets, GraphQL, Docker + Kubernetes-ready - Full lifecycle: architecture → UX wireframes → secure code → CI/CD → monitoring & A/B testing Recent wins for clients: - Real-time lead distribution dashboard handling 50K+ events/day with AI scoring - Next.js + Claude-powered dynamic landing-page CMS (40%+ conversion lift) - Legacy PHP → modern Next.js/React migration (load time 6s → <1s) - AI agent that qualifies & routes leads automatically (saved clients $400K+/yr) Available immediately for: - React / Next.js greenfield projects - LLM integrations into existing React/Node apps - Performance & architecture audits / rescue missions - Fractional CTO + hands-on development Daily stack: Next.js 14 • React 18 • TypeScript • Node.js • OpenAI • Anthropic • Gemini • Llama • ElevenLabs • tRPC • Prisma • PostgreSQL • Redis • Tailwind • Vercel • Docker • AWS Ready to turn your idea into an AI-first, revenue-generating product fast. Message me and let’s ship something exceptional.

Hello! I'm Daphne, a language lover with a strong eye (and ear!) for detail. I specialise in solo transcription and language-related projects — I don’t take on assignments that require a partner. Over the past half year, I’ve worked on transcription projects and discovered how much I enjoy turning audio into clean, accurate text. With a background in administration and software development, I bring structure, precision, and tech-savviness to every task. I’m fluent in Dutch and English, have a good understanding of German, and some knowledge of French and Spanish. While I also have experience in graphic and web design, I’m currently focused on transcription and language-related work. Reliable, fast-learning, and committed to high-quality results — that’s what you can expect when working with me. Let’s connect — I’d love to support your project!