I specialize in desktop, embedded, web, and mobile software development, with a strong focus on Qt C++ systems, cross-platform applications, and hardware integration such as RFID, sensors, and custom devices. With 25+ years of experience, I deliver end-to-end software solutions across desktop, embedded, web, mobile, backend, and integration layers. I usually work on complete systems where reliability, maintainability, and long-term ownership are important. Core Expertise • Desktop Applications: Qt C++ / QML on Windows, Linux, macOS • Embedded & Hardware Integration: RFID, sensors, custom devices • Web Development: ASP.NET Core, APIs, databases, admin dashboards, backend systems • Mobile Development: Android/iOS apps, cross-platform mobile integrations • Backend & Integrations: REST APIs, databases, TCP/IP, third-party services • Cross-Platform Systems: Windows, Linux, Android, iOS • Project Ownership: Architecture, implementation, testing, deployment, delivery Technologies & Tools • Qt C++, Qt QML, PyQt • C++, C#, Python, ASP.NET Core, WPF, WCF • Web APIs, backend systems, admin panels, database-driven applications • Socket programming, TCP/IP, multithreading, Windows services • Windows API / SDK, MFC, COM, ActiveX • Databases: MySQL, MS SQL, MariaDB, SQLite, ODBC • Embedded: Atmel Studio, Microchip Studio Strengths • Building reliable, maintainable, long-lived systems • Strong desktop, embedded, web, and mobile system integration experience • Strong analytical and problem-solving skills • Clear communication and independent execution • Full ownership from architecture to final delivery Selected Projects • RFID-based document management system • Billing and invoicing platform • Fleet tracking and management system • Automotive spectrum analyzer system • POS and pharmacy management systems • Hospital and healthcare management systems • Hotel booking and resource management system • Automotive climate control software • Embedded alarm systems • Automated greenhouse ventilation and irrigation system • Web-based business management platforms • Mobile apps connected to backend systems and hardware devices

If you need a custom app built from scratch — or you’re stuck with a half-finished codebase from a previous developer — I can help you move it forward without unnecessary rewrites. I’m Adrian, founder of Peer Concept, a small software development team. Clients work directly with me, and I bring in my team when the project needs extra frontend, backend, DevOps, QA, or UI/UX capacity. Most of our work comes from two situations: - founders building a product from zero - teams stuck with an unfinished or messy app that needs to move forward What we build and fix: - custom web applications using React, Next.js, Angular, Node.js, Django, FastAPI, and .NET - mobile apps with React Native - REST APIs and third-party integrations: payments, CRMs, internal tools, external platforms - AI features using OpenAI, Claude, LLM APIs, automation workflows, and custom AI tools - existing app takeovers — we read the code, understand the system, and continue development - end-to-end delivery: scope → build → deploy → maintain Relevant examples: - AuctionForecast — took over a data-heavy wine auction platform after multiple developers and continued development without a rewrite - Firefly — built an AI compliance monitoring system that analyzes customer communications and risk signals - DrForms — developed an AI medical documentation app that turns doctor-patient audio into structured reports - MyKidsTales — built an AI storytelling platform with personalized story generation - Blue Mountain Loans — built a consumer lending platform with application, e-signature, direct deposit, payment-processing, and risk-scoring API integrations Recent client feedback: “Adrian did a great job on our loan platform. We had multiple API integrations and a complex flow, and he handled everything smoothly.” We don’t take every project. But when we do, we focus on clear communication, stable delivery, and shipping working software. Send me a short description of what you’re building or trying to fix, and I’ll tell you within 24 hours if we’re a good fit.

Hello and thank you for visiting my profile! I'm a Full-Stack Software Engineer with a degree in Software Engineering and several years of production experience. What sets me apart is my AI-powered development workflow — I can build websites and applications in virtually any technology or framework, faster and at higher quality than ever before. My core specialization is .NET backends paired with modern, responsive frontends — React, Angular, Blazor, and Vue.js — but I'm not limited to any single stack. Whatever your project needs, I can deliver it. —————————————————— Frontend: React · Angular · Blazor · Vue.js · TypeScript · MVC · HTML · CSS Backend: .NET · C# · REST API Database: SQL · PostgreSQL · MongoDB · Azure Cosmos DB · Entity Framework Cloud & Integrations: Twilio · SendGrid · Stripe DevOps: GitLab · GitHub · Azure DevOps —————————————————— Whether you need a complex enterprise application, a sleek customer-facing product, or something in between — let's work together!

✌🤖 𝗟𝝾𝝾𝗸𝗶𝗻𝗴 𝗳𝝾𝗿 𝗮 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝝖𝝞/𝗪𝗲𝗯 𝝾𝗿 𝗠𝝾𝗯𝗶𝗹𝗲 𝗱𝗲𝘃𝗲𝗹𝝾𝗽𝗲𝗿? 15+ years in Software Engineering | 4+ years in AI/ML & Computer Vision. I build scalable, production-grade SaaS platforms driven by modern AI. From complex Computer Vision pipelines to custom LLM agents - I deliver secure architecture and clean code, not just scripts. 💡 I can help you with: • Generative AI & LLM Agents: Custom Chatbots, Copilots, and automation tools (OpenAI, Claude, Llama). • Computer Vision (CV): Object Detection (YOLO), OCR, Face Recognition, and Video Analytics. • RAG Systems: "Chat with your data" setups (PDFs, SQL, Notion) using Vector DBs (Pinecone, Weaviate). • SaaS & Web Platforms: Scalable Python/Node.js backends, React frontends, and secure REST/GraphQL APIs. • Rapid MVPs (Low-Code): Validating ideas fast using Bubble, FlutterFlow, or WeWeb. • Business Automation: Complex workflows connecting apps via n8n, Make, or Zapier. • AI Architecture Strategy: Consulting on model selection, infrastructure cost and scalability. 🔑 Why work with me ✅ Expertise - 15 years, 190+ successful projects ✅ Fair Pricing - Clear, per-sprint pricing. No ballooning budgets. ✅ Cost Effective - I’m new on Upwork, ready to work cheaper for reviews and your feedback ✅ Own everything - Code in your repos, full control, zero lock-in. ✅ No bugs, no drama - Built-in QA process = happy users ✅ Security - Secure apps, following compliance ✅ Change-ready - New idea mid-sprint? No sweat. We adjust without a mess. ✅ Crystal-clear comms - One point of contact. Straight talk. Fast replies. 🔄 How I work 1. Initial analysis - Understand your goals, blockers and success metrics. 2. Discovery - Map out the scope, pick the right tech, create a development roadmap 3. Build phase - Rapid, structured development in clear iterations/sprints with feedback sessions and regular reporting. Extensive testing. 4. Delivery - Sharing Code, documentation and final deployment 5. Support - Ongoing improvements and post-launch care if needed 🧰 Tools we use Whatever suits your product best, not just trendy stacks. • Frontend: React.js, Next.js (SSR), TypeScript, Tailwind CSS • Backend: Python (FastAPI, Django), Node.js, GraphQL, REST APIs, gRPC • AI/ML: OpenAI (GPT-4), Anthropic (Claude), LangChain, LlamaIndex, YOLOv8 (CV), PyTorch • Mobile & Web: React Native (CLI/Expo), Flutter, iOS & Android Native Modules, PWAs • Infra: AWS, GCP, Azure, Serverless, Kubernetes, Fargate • Databases: PostgreSQL, MongoDB, Redis, Vector DBs (Pinecone, Weaviate) for RAG • No-code/Low-code: Bubble, Xano, WeWeb, FlutterFlow, n8n, Zapier, Make → Especially powerful in early-stage MVPs and rapid PoCs. 📩 Not sure where to start? Let`s hop on a first call and create your 𝗗𝗲𝘃𝗲𝗹𝝾𝗽𝗺𝗲𝗻𝘁 𝗥𝝾𝗮𝗱𝗺𝗮𝗽 for 𝗙𝗥𝗘𝗘. P.S. I have a friendly team of 20+ developers, so if you need a bigger team, faster delivery or just want to get a partner ready for both MVPs and scale, I`ll be the perfect choice.

Hey, let's build something fantastic! 🎉 If you're looking for the best of the best on Upwork – you've found him: showcasing the highest badges available (Top Rated Plus 🏅 and Expert-Vetted 🌟), I provide reliable communication, obsession with detail, and insane problem-solving skills! With extensive experience in full stack software engineering, software architecture, and infrastructure, along with a strong background in UI/UX design, I offer a complete end-to-end solution, ensuring your projects not only function flawlessly but also look and feel exceptional. 👉 AI & Machine Learning: 🞄 Model Development and Training 🞄 Fine-tuning Pre-trained Models 🞄 Structured and Stable Output Generation 🞄 Cost Optimization for AI Solutions 🞄 Prompt Engineering and Fine-tuning for NLP Tasks 👉 Data Science & Analytics: 🞄 Data Cleaning, Processing, and ETL Pipelines 🞄 Statistical Analysis and Hypothesis Testing 🞄 Predictive Modeling and Forecasting 🞄 Exploratory Data Analysis (EDA) and Visualization 🞄 A/B Testing and Experimental Design 🞄 Business Intelligence Tools (Tableau, Power BI) 🞄 Data-Driven Decision Making 👉 CRM/ERP/Database-Driven Solutions: 🞄 SQL, MongoDB, Firebase DB, PostgreSQL, MySQL, Redis 👉 Web Applications (FE): 🞄 JavaScript/TypeScript 🞄 Vanilla JS, ES6/ES2015, Angular 2+, React, Vue.js, Nuxt.js, jQuery 🞄 HTML/CSS, Bootstrap, Angular Material, Tailwind CSS 👉 Web Applications (BE): 🞄 Node.js, NestJS, Sails.js 🞄 PHP, Laravel 👉 Mobile Applications: 🞄 Ionic, React Native, Flutter 🞄 End-to-end from wireframing/prototyping to UI/UX to implementing to publishing to app stores 👉 Websites & CMS: 🞄 WordPress 🞄 Custom Themes and Plugins 🞄 E-commerce (WooCommerce, Shopify) 👉 UI/UX Design: 🞄 Figma 🞄 User Research, Wireframing, Prototyping 🞄 Responsive and Adaptive Design, Accessibility Standards (WCAG) 🞄 A/B Testing 👉 Serverless & Microservices: 🞄 AWS (Lambda, EC2, S3, DynamoDB, Route 53) 🞄 Firebase Functions 👉 Cloud Infrastructure: 🞄 AWS, Google Cloud Platform 👉 Data Visualizations: 🞄 Highcharts, Chart.js, D3.js, AmCharts 🞄 Charts, Maps, Tables, Knowledge Graphs 🞄 Leaflet.js, Mapbox, Google Maps 👉 Automation/Human Emulation: 🞄 Puppeteer, PhantomJS, Selenium 👉 Much more: 🞄 Chrome extensions 🞄 PDF Processing and Generation 🞄 API Integrations & Payment Gateways 🞄 Data Extraction and Mining 🞄 Marketing and Tracking Solutions 🞄 Anything else I only submit proposals to projects that I find exciting and match my expertise perfectly, so if I applied to work on yours you can bet you'll absolutely love the results. 💯

🏆 Scalable Systems • Full-Stack Platforms • Mobile Applications I specialize in the development of scalable and production-ready platforms for the web, mobile, and backend domains. I help startups and companies implement ideas and solutions that are robust and perform well. I have more than 10 years of experience and specialize in the development of scalable and production-ready platforms for the web, mobile, and backend domains. I use Python, .NET, and other modern frontend and mobile development technologies. I help companies implement ideas and solutions that are robust and perform well. I have a robust systems background and understand the importance of developing an application that does not just perform well but also scales well. I do not build individual features; I build scalable products. 🚀 What I Specialize In ✅ Full-Stack Web Development (Frontend + Backend + APIs) ✅ Cross-Platform Mobile Apps (Flutter & Native iOS/Android) ✅ Scalable Backend Systems (Python, .NET Core & .NET Framework) ✅ SaaS Platforms & Product Development ✅ Real-Time & Data-Driven Applications ✅ Microservices & Distributed Architectures 🧠 Technical Expertise ⚡ Backend & Systems - Python (FastAPI, async systems, data pipelines) - C# / ASP.NET Core / .NET Framework (Web API, MVC, legacy modernization) - REST APIs, gRPC, WebSockets - Microservices, event-driven architecture - Redis, caching, distributed coordination 🌐 Full Stack Development - React, Angular, Vue, Next.js - Redux, Redux-toolkit, Zustand, Tanstack - Tailwind CSS, BootStrap, SCSS - Node.js / TypeScript - Responsive UI, dashboards, real-time interfaces 📱 Mobile Development - Flutter (Dart) - iOS & Android - Native Android (Java/Kotlin), iOS (Swift) - Firebase, push notifications, real-time sync - Stripe, Google Maps, Twilio integrations 📊 Databases - PostgreSQL, MSSQL, MongoDB, MySQL, Neo4j - Data modeling, performance optimization ⚙️ DevOps & Infrastructure - AWS, Docker, Kubernetes - CI/CD (GitHub Actions, Bitbucket Pipelines) - Cloud-ready architecture & deployments 💡 Where I Add the Most Value ✔ Building scalable applications from scratch (MVP - production) ✔ Improving systems with performance or scaling issues ✔ Developing full ecosystems (backend + frontend + mobile) ✔ Designing clean, maintainable architectures ✔ Acting as a technical partner for long-term projects 🏗️ Selected Experience ✅ Built full-stack SaaS platforms with integrated mobile apps ✅ Designed scalable backend systems handling high-volume data ✅ Developed real-time applications using WebSockets and event-driven patterns ✅ Delivered cross-platform mobile apps with seamless backend integration ✅ Optimized systems for performance, reliability, and maintainability ⚙️ How I Work - Architecture-first approach for long-term scalability - Clear milestones with consistent progress updates - Focus on production-ready, maintainable code - Fast communication and transparent collaboration 🎯 What You Can Expect ⭐ Clean, scalable, production-ready systems ⭐ Strong focus on performance & reliability ⭐ Fast understanding of project requirements ⭐ Honest technical guidance and clear communication ⭐ Long-term support and partnership mindset 🔑 Philosophy ⭐️ Great software isn't just built to work - it's built to scale, adapt, and last.

Give me something to build, and I'll build it in weeks so it works 24/7. That's my promise: from idea to a real product 5K MRR with SaaS 20 hours/week cut using internal tool I help startups and businesses build scalable SaaS platforms, internal tools, and automation systems that streamline operations, reduce manual work, and support long-term growth. As a Full Stack Developer, I help startups and businesses build scalable web applications using Next.js, React, Supabase, Node.js, PostgreSQL, AI integrations, and modern full-stack architectures. I build production-ready platforms including: • Internal business systems • Dashboards & admin portals • SaaS applications • Workflow automation platforms • Client portals • Marketplace platforms • Multi-role web applications • Analytics & reporting systems • AI-powered applications • Custom operational software Lovable.dev As a Full Stack Developer, I handle projects end-to-end — from frontend development and backend architecture to database design, API integrations, authentication systems, deployment, and scaling. I work as a Full Stack Developer across both frontend and backend development, building scalable applications designed for real-world business operations and production environments. My stack as a Full Stack Developer includes: • Next.js • React • Node.js *Lovable.dev • TypeScript • Supabase • PostgreSQL • OpenAI APIs • Stripe • n8n • Vercel I’ve worked as a Full Stack Developer on platforms across multiple industries including analytics, operations, education, marketplaces, automation, AI systems, and internal business management tools. Clients usually hire me as a Full Stack Developer when they need: • A Full Stack Developer who can build complete platforms end-to-end • A scalable web application built properly from the beginning • A modern dashboard or internal business system • A Full Stack Developer who understands workflows, operations, and business logic • A system that replaces spreadsheets and manual processes • A clean and scalable architecture ready for production As a Full Stack Developer, I focus on: • scalable architecture • clean UI/UX • fast execution • strong communication *Lovable.dev • production-ready systems My expertise as a Full Stack Developer includes: • SaaS platforms • Internal tools • Business platforms • Dashboard systems • Workflow automation * Lovable.dev • AI-powered web applications • Client portals • API integrations • Multi-role applications • Custom business software If you’re looking for a Full Stack Developer to build a scalable SaaS platform, internal tool, dashboard, or custom web application, feel free to message me. Full Stack Developer | Full-stack developer | Full stack | Developer | Web developer | web applications | MVP Developer | SaaS Developer | Full Developer | Full-stack-developer | Supabase | Nextjs | Node js | Resend | Tailwind CSS | AI integrations | Full Stack web developer | Full Stack MVP Develop | Full Stack SaaS Developer

I am a senior programmer with an impressive 13-year track record in commercial development, specializing .NET technologies and others. My unwavering commitment has always been to deliver excellence, consistently focusing on delivering high-quality products that exceed customer expectations. Over the course of my extensive career, I have continually refined my skills and expertise to provide innovative solutions that not only meet but also consistently surpass the evolving demands of today's software landscape. Skills overview: ► Programming languages: C#, Action Script 3, Python, C++. ► User Interface: WPF, WinForms. ► IoC: UnityContainer, StructureMap. ► Unit testing frameworks C#: NUnit, Moq. ► Database: SQL, SQLite. ► ORM: Entity Framework, SQLite.Net-PCL. ► Third party WPF libraries: DevExpress, SyncFusion, MaterialDesign. ► Game engines: Unreal Engine 4, Flare3D. ► Continues integration and PM SW: Bitbucket, Jenkins, TeamCity, Azure DevOps, Jira, Trello. ► Versioning: Git, SVN. ► Design patterns: Factory, Decorator, Strategy, Observer ... ► Architectural patterns: MVC, MVVM. ► Frameworks: Prism, Caliburn, MVVM Light. ► Design software: Photoshop. ► Texturing software: Substance Painter. ► 3D Modeling software: Blender. ► ASP.NET Core API. ► ASP.NET Core Web App.

I am a full-stack C# developer that offers customized RPA/ETL and other back-end related solutions and services. Client satisfaction is my main priority and will always do my best to ensure they are happy with the end results. C#, Python Web Scraping & Web Automation Browser Automation - Selenium/Playwright Chrome Extensions Data Extraction & Data Processing MS Office Automation Bots (Telegram, Slack, Discord) Api Implementation

I help founders and businesses turn ideas into working software. My focus is building maintainable web applications, SaaS products, internal tools, dashboards, and business platforms from concept through deployment. I work across both frontend and backend, with a strong emphasis on architecture, clarity, and long-term maintainability. Typical projects include: • SaaS MVPs and startup products • CRM and business management systems • Dashboards and administration portals • AI-assisted applications and workflows • API integrations and automation systems • Custom internal business tools My primary stack includes Vue.js, Node.js, Express, PostgreSQL, and modern web technologies, but I choose tools based on project requirements rather than preference alone. What clients usually value most is my ability to think beyond implementation details. I don’t just build screens: I help structure systems, clarify requirements, identify risks early, and make practical technical decisions that support future growth. Whether you need a complete MVP, a new feature, backend architecture, or help stabilizing an existing product, I aim to deliver software that remains understandable, maintainable, and useful long after the initial launch. If you have an idea you’re trying to turn into a real product, feel free to reach out.