My primary skill is web and desktop automation. Over the last 15 years, I have developed a wide range of applications using Python, PHP, C#, Google Apps Script, different APIs, frameworks, Zapier, Make etc. Most of my work is done using Python but I can work with Perl, C#, PHP, VBA, VB.NET too. Also I have worked a lot with Zapier and some of my workflows / zaps are really complex: including dozens of steps and different APIs / app. I have created several hundreds of web scrapers, spiders and different parsers (CSV, XML, XSLT, JSON, text logs etc). I can work with different database engines (MySQL, Postgres, MS SQL Server etc) and other output formats (CSV, Excel, XML, JSON). Usually my work starts with a simple (and free) demo version which my client can evaluate. My rates are not the cheapest but my code is really good and I'm always prioritize code quality over cost, resulting in robust and maintainable solutions.

Senior Full-Stack Developer • Performance Optimization Expert Java, Kotlin, JavaScript (frontend/backend), C++, Python, PHP, Perl SQL/NoSQL, Web/Desktop apps, Automation, Web Scraping I help companies make their software faster, lighter, and more efficient. 20+ years of hands-on experience in system performance tuning, profiling, solving bottlenecks, and refactoring legacy systems. If your application is slow, unstable, memory-hungry, or needs deep analysis — I can fix it. ⸻ 🧩 My Core Expertise • Performance optimization (Java/JVM, databases, backend services) • Query optimization, memory leak detection, code profiling • Refactoring legacy code, stabilizing old systems • Full-stack development (Java/Kotlin + JS, Python, PHP, Perl, C++) • Web automation & scraping • Systems analysis, debugging, complex issue resolution ⸻ 🚀 What I Deliver • Faster request processing • Reduced memory & CPU usage • Significantly improved database performance • Clean, maintainable, well-structured code ⸻ 🤝 Availability Open to long-term or part-time collaboration (30–40 h/week). Also interested in innovative startups: your idea — my implementation. ⸻ Let’s make your software fast, stable, and scalable!

Expert Software Developer with 30 years of proven experience. Expert on Telephony, Streaming, MVC and Web Services and Alexa Skills. Expert Loan Origination Expert - Encompass, Calyx Point, Avista. Integration of these with other applications. Also team of expert loan processors available. Expert Kronos Consultant on UKG Pro, Pro WFM, WorkForce Dimensions, WorkForce Ready and WorkForce Central. Expert Workday Consultant on Soap, REST, RASS and WQL. SetUp and Configuration of Security Profiles and Implementations. Deep knowledge of UKG Kronos API and Setup and Configuration. More details here - mcl.in/ukg

Senior Software Engineer | AI Integration & LLM Systems | AI Video Pipelines | Full-Stack & Technical Consulting I build things most developers can't — from production AI agents and LLM pipelines to real-time video processing infrastructure, WebRTC systems, and full-stack web applications. With 22+ years of hands-on engineering experience, I operate across the full stack of abstraction: from x86/ARM assembler up to React/Next.js, and everything in between — including the cutting edge of applied AI. Where I add the most value: AI Integration & LLM Systems — My current primary focus, and one of the fastest-growing needs on the market. I design and build practical AI systems that go beyond API wrappers: autonomous code agents, voice recognition pipelines, LLM integrations using LlamaCpp and HuggingFace, Retrieval-Augmented Generation (RAG) architectures, and reinforcement learning feedback loops. If you have an existing product and need AI capabilities embedded into it properly — not bolted on — this is where I thrive. AI-Powered Video Pipelines — A rare combination: deep AI knowledge paired with deep video engineering expertise. I build the infrastructure behind AI video tools — real-time processing, generation pipelines, and streaming architectures using FFmpeg (API and CLI), Media Foundation, and custom SDKs. Whether you're building an AI video editor, a live AI-enhanced stream, or a 250–360° panoramic solution, I can own the full pipeline from capture to output. WebRTC & Real-Time AI — Real-time communication systems enhanced with AI capabilities: live transcription, translation, moderation, and analysis. Proficient in WebRTC end-to-end, with the AI layer built in from the ground up rather than patched in afterward. AI Chatbot & Agent Development — Building production-grade conversational agents and autonomous systems with custom backends, memory, tool use, and real integrations — not no-code wrappers or off-the-shelf demos. Technical Leadership & Team Consulting — Sometimes the most valuable thing a project needs isn't more code — it's the right direction. I help clients assess their engineering teams, audit existing codebases, and evaluate software stacks and architectures before committing to a costly build. Whether you're choosing between competing technology approaches, need an independent expert to validate a technical decision, or require a fractional technical lead — I can step in as a trusted advisor. I also form and coordinate small teams of specialists when a project scope requires it, matching the right engineers to the right problems. Low-Level & Systems Programming — Custom HTTP servers, Nginx modules, WebSocket implementations, eBPF, ICMP and raw IP protocols, OS kernel work, and hardware device drivers. This foundation is what allows me to optimize AI inference performance and video pipelines at a level most engineers simply can't reach. Cross-Platform Native Development — 12 years with OpenGL, plus Metal, Vulkan, and DirectX across macOS, iOS, Windows, and Linux. Experienced with Raspberry Pi and embedded/specialized devices. Web & Full-Stack — 15 years of JavaScript (React, Next.js, TypeScript, Node.js, Three.js, WebGL), 10 years of PHP (Laravel, CakePHP, MySQL), and Python/FastAPI for backend services. Additional languages & tools: C# / MSSQL, Java, Python, Qt/PyQt, Perl — all with 5+ years of production use. I'm equally comfortable building an AI agent from scratch, architecting a real-time video pipeline, advising a CTO on a critical technical decision, or assembling the right team to deliver a complex product. If your project sits at the intersection of AI and real engineering — not just prompting — let's talk.

🌟 Expert-Vetted Talent - Recognized in Upwork's top 1% of Talent ✅ Established Track Record of Hours and Earnings 🚀 Fastest Response Times 💯 100% Job Success Awarded by Clients 🔝 Top Rated Plus by Upwork, Freelancer and Agency 🔎 Searching for New Opportunities and Problems to Solve Hello and welcome, thank you for considering me for your project. My Upwork profile’s stats clearly demonstrate both my expertise and the value I add to every team that brings me on. The thousands of hours clocked on this platform alone speak to my years of experience in Software Development, and the total earnings shows a glimpse of how valuable that time has been for clients. I am available and ready to answer specific questions about your project’s current problem, next opportunity, or my fit for it. Shall we get to work? Send a message or an invite now and I will be right with you. 𝐖𝐡𝐲 𝗖𝗹𝗶𝗲𝗻𝘁’𝘀 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞: 1. 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗮𝗻𝗱 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: Decades of experience bring a deep understanding of various languages, frameworks, platforms and tools, common and uncommon pitfalls, and alternative solutions. 🗯️ “He was very responsive to our messages and explained what was needed in our project clearly. He is definitely an expert in his work.” 2. 𝗘𝗳𝗳𝗲𝗰𝘁𝗶𝘃𝗲 𝗣𝗿𝗼𝗯𝗹𝗲𝗺 𝗦𝗼𝗹𝘃𝗶𝗻𝗴: I have a proven track record and knack for solving complex problems and providing customized solutions for specific business needs and challenges. 💭 “Isaac was able to quickly discern what I needed and delivered…” 3. 𝗦𝘆𝘀𝘁𝗲𝗺 𝗩𝗶𝗲𝘄 𝗮𝗻𝗱 𝗖𝗼𝗺𝗽𝗿𝗲𝗵𝗲𝗻𝘀𝗶𝗼𝗻: Years of experience and diverse projects have helped me accumulate a broad set of skills and tools. I use this experience to the advantage of my client’s projects in not only accomplishing tasks, but in advising and consulting on potential challenges and opportunities. 💬 “LIFE SAVER!!! I have now use(d) Issac for two separate jobs now and will be bringing him on for some regular hours. Hopefully we get some funding and I can do even more with him. GREAT DEVELOPER” 𝐌𝐲 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: Python|Django|PHP | MySQL | Laravel | WordPress | CodeIgniter | ExpressionEngine | CSS | HTML | JavaScript | Express.js | React.js | Bootstrap | PostgreSQL | NoSQL | Linux | Apache | Nginx | API | Git | SVN | Amazon Web Services | AWS EC2 | 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝗜 𝐎𝐟𝐟𝐞𝐫: 𝐅𝐫𝐨𝐧𝐭 𝐚𝐧𝐝 𝐁𝐚𝐜𝐤-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Planning, Design, Documentation, Coding, Testing, Debugging, Deployment, Monitoring, and Maintenance. 𝐒𝐲𝐬𝐭𝐞𝐦 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧: Cloud infrastructure Design, Deployment, Optimization, Maintenance, Scaling, Recovery and Backup, Troubleshooting, and Cost Management. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 Management: Architecting, Optimization, Monitoring, Recovery, Updating, and Merging. 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: Planning, Project Requirements, Task Detailing, Developer Support and Feedback, Problem Resolution, Progress Monitoring, Qualification Testing, and Stakeholder Communication.

As a seasoned freelance programmer with a strong foundation in security and Unix systems, I bring a wealth of expertise to the realm of software development. With a passion for tackling complex challenges, I specialize in full-stack development, reverse engineering, and imparting knowledge through tutoring. Technical Proficiency: - Programming Languages: Proficient in a diverse range of languages including Python, Java, Ruby, Perl, C, JavaScript, and more! - Security Expertise: Extensive experience in identifying and mitigating security vulnerabilities. Adept at conducting penetration testing, threat modeling, and implementing robust security measures. - Unix Mastery: In-depth understanding of Unix-based systems, with a focus on Linux. Capable of optimizing system performance and ensuring the security and stability of Unix environments. Full Stack Development: - Frontend: Skilled in crafting responsive and user-friendly interfaces using HTML, CSS, and JavaScript frameworks such as React and Angular. Backend: Experienced in developing scalable server-side applications with proficiency in Node.js, Django, and Flask. Database Management: Proficient in designing and implementing databases using MySQL, PostgreSQL, and MongoDB. Reverse Engineering: - Binary Analysis: Expertise in reverse engineering and analyzing binaries to uncover vulnerabilities and enhance software security. Tutoring and Mentorship: - Educational Background: Possessing a comprehensive understanding of programming fundamentals, security concepts, and Unix systems, I am adept at conveying complex ideas in an accessible manner. - Mentorship: Committed to fostering the growth of aspiring developers through personalized guidance, code reviews, and hands-on mentorship. Additional Skills: - DevOps: Proficient in implementing CI/CD pipelines, containerization (Docker), and orchestration (Kubernetes) for streamlined development and deployment processes. - Networking: Knowledgeable in networking protocols, firewall configurations, and VPN setups to ensure robust and secure communication. - Cloud technologies: AWS, GCP, and Azure. Professional Approach: - Problem Solver: Known for my analytical mindset and creative problem-solving skills, I thrive in dynamic environments and excel at finding innovative solutions to intricate challenges. - Collaborative Team Player: Effective in cross-functional collaborations, I communicate technical concepts to both technical and non-technical stakeholders, fostering a cohesive and productive working atmosphere. With a commitment to continuous learning and a track record of delivering high-quality solutions, I am well-equipped to contribute to projects requiring a versatile and experienced freelance programmer with a focus on security and Unix environments.

Seasoned technology professional with 20+ years of comprehensive expertise in Linux systems, SQL databases, Perl programming, and data transformation and analysis. Proven ability to write, optimize and troubleshoot complex SQL queries.

- 🛠️ macOS/iOS Development: 10+ apps shipped using Swift/Swift UI/Objective-C - 🤖 VBA Automation: Delivered various macros/automation for clients. - 🚀 Full-Stack Capability: Type Script & Python (Flask/Django) & C++ backend integration Technical Arsenal: 🖥️ macOS/iOS Development - Swift/Swift UI: 10+ years, 10+ apps shipped - Objective-C: Legacy system migration expertise - Core Frameworks: AppKit, Core Data, Combine - macOS Code Signing and Notarization 🤖 Automation Engineering - VBA: 10+ years, enterprise-grade solutions - AppleScript: Seamless macOS integration - Python Automation: Selenium, Pandas integration ⚙️ Backend & Integration - Python: Flask/Django REST APIs - C++: High-performance computing modules - Cloud Integration: AWS S3, iCloud Sync My Commitment to Clients: I don't just write code - I deliver solutions that drive real business results. Whether it's automating tedious workflows or building mission-critical macOS/iOS applications. Let's build something extraordinary together.

$3M+ earned on Upwork. 25+ years, 600+ projects, and platforms serving 20M+ users. We build production-grade SaaS, CRM, ERP, marketplaces, automation & AI systems with PHP, React, Python and modern cloud architecture - built to last, not patched together. Looking for a veteran full-stack web development team to bring your CMS, CRM, ERP, SaaS, marketplace, or data platform to life? We don’t do quick hacks or throwaway code. We build systems that last. Results: - 100+ SaaS and CRM platforms launched from scratch - 300+ automation tools built - 150+ POS, Web-to-Print, and location-aware applications delivered - platforms serving 20M+ users with 99.99% uptime - ERP systems reducing operational overhead by 40%+ - web automation saving 1,000+ hours per month per client We are a senior team of full-stack engineers with 25+ years of hands-on web development experience and 600+ successful projects delivered across 40+ industries. We focus on long-term, production-grade systems where architecture, performance, and business logic truly matter. We operate as web developers, React developers, WordPress developers, mobile app developers, and backend engineers, delivering full-cycle product development using PHP, JavaScript, and Python. Our stack includes Laravel, Symfony, Vue, React, Angular, Node.js, Next.js, TypeScript, jQuery, MySQL, PostgreSQL, Redis, and modern API-first architectures. Whether you need a full-stack developer (PHP, JavaScript, Python), a Python full-stack developer, or a PHP Laravel Angular combination, we cover the entire lifecycle end to end. As front-end full-stack specialists, we build high-performance dashboards, SPAs, PWAs, and data-heavy interfaces using React, Vue, Angular, Next.js, and TypeScript. Our React team focuses on performance, scalability, and UX logic, while our backend engineers design robust systems with REST and GraphQL APIs, multitenant architectures, role-based access control, billing engines, reporting pipelines, and audit trails. We also work as software developers and full-stack AI engineers when projects require machine learning, automation, or advanced data processing. Our Python full-stack teams build data pipelines, AI-assisted workflows, and automation systems that reduce operational overhead and deliver measurable business value. This includes AI-enabled backends, LLM integrations, and ML-driven platforms. As WordPress developers, we build custom plugins, headless CMS architectures, and React or Vue frontends. As mobile app developers, we deliver iOS and Android applications using React Native and native stacks, tightly integrated with scalable backends. As PHP full-stack developers, we handle both greenfield builds and complex legacy modernization. We regularly work as: - full-stack web development teams on SaaS, ERP, CRM, POS, LMS, and Web-to-Print platforms - full-stack squads on marketplaces, fintech, and data platforms - Python full-stack teams on automation and analytics pipelines - PHP Laravel Angular teams on enterprise systems - React and front-end full-stack teams on complex UI platforms - full-stack AI teams on ML-powered products We handle the full spectrum: system architecture, development, DevOps, CI/CD, Docker, AWS, GCP, Apache, Nginx, and long-term maintenance. We design systems that scale in production, survive real-world usage, and support sustainable business growth. Whether you need a web developer to extend your platform, a React developer to rebuild your frontend, a WordPress developer for custom CMS logic, a mobile app developer to complement your product, or a full-stack AI team to connect data, automation, and intelligence, we bring decades of hands-on experience and production-grade delivery.

I'm web scraping expert using Python, Puppeteer & PHP and an experienced SharePoint, ShareGate, Office 365 and Power Platform & Automate developer, with a strong focus on data management. Web scraping skills: * Python using Scrapy / Requests / Selenium * Python with Tkinter for Desktop Application * Python with Django for Web Application * Python with BeautifulSoup / RegEx for data parsing * Python with Pandas for data handling (data manipulation and analysis) * Node.js and Puppeteer for web-automation * PHP for web user interface * Provide solution for handling blocking * Perl using Mechanize / LWP * Java using HtmlUnit / Selenium, PhantomJS * Google Apps Script & Sheet Working Experience in Different Verticals: * E-commerce * Health-care * Real Estate * Jobs sites * Contact Listings * Social Networks * Price Comparison My skills extend to developing cloud-based solutions, automating business processes, and creating custom applications within the Microsoft ecosystem, all while leveraging my expertise in handling data downloads and conversions. SharePoint & Power Platform Skills: • Expertise in the analysis, design, development, and Implementation of enterprise-scale applications. • Developed Web applications using Power Apps (Canvas Apps, Model driven) with a data source of Dataverse, SharePoint, SQL and Excel. • Developed Web application using SharePoint Framework with Modern front-end development technologies like ReactJs, and NodeJs. • Well experienced in Design, customization, Microsoft Dynamics CRM Out of Box Features, and implementation of Microsoft Dynamic CRM. • Well Experienced in creating and deploying the plug-ins using plug-in registration tools (or) developer toolkit. • Experience in ribbon customization Dynamics 36. • Extensively worked on Implementing security roles, with access and privileges levels, with different security models. • Experienced client-side customization using Web API, business rules and Javascript. • Experienced in Creating and configuring workflows like instant, schedule and approval automation processes, Backend Jobs like Export, and PDF generation using power automated action and trigger with Standard and premium connectors. • Collaborated with developers and contributed to improving the performance of the Canvas app by applying best practices like Delegation, Screen Optimization, Components, and network call optimization. • Experienced in Setting up Office Tenants, SharePoint Online. • Experienced in Customizing SharePoint sites in the legacy way and Modern ways like Webpart, JSON formatting and customizing permission * Experienced in deployment and managing the application Looking forward to many great work experiences.