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I'm an innovative Computer Engineer with skills in Computer, Embedded, and Electronic Design. Experienced in developing IOT systems, and programming them. Let's make your ideas come to reality. Services Offered: - Embedded Hardware (Arduino, AVR, ESP32, CH32, STM32, Nordic) - Schematic Design / Modification / Review - BOM/Component Selection - PCB Design / Modification (KiCAD, EasyEDA) - Embedded Firmware (Arduino, PlatformIO, ESP-IDF, STM32) I also offer these services: - Web App Development (Node.JS, REST, Firebase) - 3D Parametric Enclosure/Part Modeling and Design (FreeCAD, Autodesk Fusion)

🏆 𝗨𝗣𝗪𝗢𝗥𝗞 𝗘𝗫𝗣𝗘𝗥𝗧 𝗩𝗘𝗧𝗧𝗘𝗗 💪 Top 1% of performers | 15,000+ hours 🎖️ Top Rated Plus | 100% Job Success ✔︎ 20+ years experience in Embedded Systems, IoT & Full Stack Development I design and develop production-grade embedded and IoT systems, from firmware and hardware integration to cloud-connected platforms. Specialized in STM32, Nordic nRF52/nRF53/nRF91, ESP32, RTOS (FreeRTOS/Zephyr), and secure C/C++ firmware development. I help companies turn hardware concepts into reliable, scalable, real-world products. 🚀 𝗔𝗕𝗢𝗨𝗧 𝗠𝗘 I am a Senior Embedded Systems and IoT Engineer with over 20 years of experience delivering production-ready systems across embedded firmware, hardware design, cloud infrastructure, and full stack applications. I specialize in end-to-end system development — from low-level firmware and PCB collaboration to cloud integration and application layers — ensuring robust and scalable real-world deployments. I work with startups and engineering teams to transform complex ideas into reliable production systems. 🔧 𝗘𝗠𝗕𝗘𝗗𝗗𝗘𝗗 𝗦𝗬𝗦𝗧𝗘𝗠𝗦 & 𝗙𝗜𝗥𝗠𝗪𝗔𝗥𝗘 Extensive experience in production-grade embedded firmware development. ▸ 𝗠𝗜𝗖𝗥𝗢𝗖𝗢𝗡𝗧𝗥𝗢𝗟𝗟𝗘𝗥𝗦 & 𝗣𝗟𝗔𝗧𝗙𝗢𝗥𝗠𝗦 ▪ ARM Cortex-M ▪ STM32 ▪ Nordic nRF52 / nRF53 / nRF91 ▪ ESP32 / ESP8266 ▪ Raspberry Pi ▪ Arduino ▪ Microchip PIC ▪ Silicon Labs BGM220 ▸ 𝗥𝗧𝗢𝗦 & 𝗘𝗠𝗕𝗘𝗗𝗗𝗘𝗗 𝗔𝗥𝗖𝗛𝗜𝗧𝗘𝗖𝗧𝗨𝗥𝗘𝗦 ▪ FreeRTOS ▪ Zephyr RTOS ▪ Bare-metal firmware ▪ Multi-threaded systems ▪ Event-driven architectures ▪ OTA firmware updates ▪ Secure boot & encrypted firmware ▸ 𝗖𝗢𝗠𝗠𝗨𝗡𝗜𝗖𝗔𝗧𝗜𝗢𝗡 & 𝗪𝗜𝗥𝗘𝗟𝗘𝗦𝗦 ▪ UART, SPI, I2C, USB ▪ BLE, Bluetooth Classic ▪ LoRa / LoRaWAN ▪ Wi-Fi, LTE, NB-IoT ▪ RS232 / RS485 ▸ 𝗦𝗘𝗖𝗨𝗥𝗜𝗧𝗬 & 𝗡𝗘𝗧𝗪𝗢𝗥𝗞𝗜𝗡𝗚 ▪ TCP/IP, MQTT, HTTP/HTTPS ▪ TLS / mbedTLS ▪ ARM TrustZone ▪ Secure elements (Optiga, ST-SAFE) ▪ PKI systems ▪ JSON, XML, Protobuf ☁️ 𝗜𝗢𝗧 & 𝗖𝗟𝗢𝗨𝗗 𝗦𝗬𝗦𝗧𝗘𝗠𝗦 ▪ AWS IoT, EC2, S3, RDS ▪ MQTT-based architectures ▪ Industrial IoT platforms ▪ Telemetry & remote monitoring ▪ Cellular / NB-IoT / LTE devices ▪ Robotics & automation systems 💻 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 ▸ 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 ▪ Java (J2SE/J2EE), Spring ▪ JSF, JSP, Servlets ▪ Hibernate, JPA ▪ Node.js ▪ PHP / CakePHP ▪ REST APIs ▸ 𝗙𝗥𝗢𝗡𝗧𝗘𝗡𝗗 ▪ ReactJS ▪ JavaScript, HTML5, CSS3, Bootstrap ▸ 𝗗𝗔𝗧𝗔𝗕𝗔𝗦𝗘𝗦 ▪ MySQL ▪ Apache Derby ▪ Database design & optimization 🛠 𝗛𝗔𝗥𝗗𝗪𝗔𝗥𝗘 & 𝗣𝗖𝗕 𝗗𝗘𝗦𝗜𝗚𝗡 ▪ PCB design (Altium Designer / KiCad) ▪ Analog & digital circuit design ▪ Hardware bring-up & debugging ▪ Sensor integration ▪ Power systems ▪ Motor control (PWM, stepper, servo, robotics) 🧠 𝗜𝗠𝗔𝗚𝗘 𝗣𝗥𝗢𝗖𝗘𝗦𝗦𝗜𝗡𝗚 & 𝗔𝗜 ▪ OCR systems ▪ Signal processing & filtering ▪ Embedded AI / ML integration ▪ Sensor data conditioning ▪ Computer vision pipelines 🧪 𝗤𝗨𝗔𝗟𝗜𝗧𝗬 & 𝗦𝗘𝗖𝗨𝗥𝗜𝗧𝗬 ▪ Secure firmware architecture ▪ Veracode static/dynamic analysis ▪ System debugging & reliability engineering ▪ Performance optimization ▪ Production-grade system hardening 🧾 𝗣𝗥𝗢𝗚𝗥𝗔𝗠𝗠𝗜𝗡𝗚 𝗟𝗔𝗡𝗚𝗨𝗔𝗚𝗘𝗦 ▪ C / C++ ▪ Embedded C ▪ Java ▪ Python ▪ JavaScript ▪ PHP ▪ MATLAB 🎯 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 𝗣𝗛𝗜𝗟𝗢𝗦𝗢𝗣𝗛𝗬 I focus on building reliable, maintainable, and production-ready systems by combining strong engineering fundamentals with real-world product experience across hardware, firmware, cloud, and software layers. If you need embedded firmware, IoT systems, cloud integration, or full stack development, I can help bring your product from concept to production.

I help businesses grow organic visibility across Google, Bing, AI Overviews, ChatGPT, Gemini, Claude, Perplexity, Bing Copilot, and answer engines. If your site is not ranking, earning traffic, generating leads, or being cited by AI tools, I can help. My work combines SEO, AEO, GEO, technical SEO, on-page SEO, content strategy, entity optimization, structured data, local SEO, and AI search optimization. The goal: make your website easier for search engines, LLMs, and buyers to find, understand, trust, and choose. What I can help with: ✅ SEO audits, AEO audits, GEO audits, and organic growth roadmaps ✅ Technical SEO for crawlability, indexing, redirects, canonicals, sitemaps, robots.txt, site architecture, duplicate content, broken links, and internal linking ✅ On-page SEO for title tags, meta descriptions, H1/H2 structure, service pages, location pages, category pages, product pages, blog posts, and landing pages ✅ AI search optimization for ChatGPT, Gemini, Claude, Perplexity, Bing Copilot, Google AI Overviews, LLM citations, answer visibility, and entity recognition ✅ Schema markup and structured data for Organization, LocalBusiness, Service, Product, Article, FAQ, HowTo, Review, Breadcrumb, and rich-result opportunities ✅ Keyword research, search intent mapping, topic clusters, content briefs, topical authority planning, semantic SEO, and entity-based content strategy ✅ WordPress SEO, Shopify SEO, WooCommerce SEO, Elementor SEO, Divi SEO, Yoast SEO, Rank Math, AIOSEO, and CMS optimization ✅ Google Search Console, GA4, Google Tag Manager, Looker Studio, Screaming Frog, Ahrefs, Semrush, SE Ranking, PageSpeed Insights, Core Web Vitals, and analytics reporting ✅ Local SEO, Google Business Profile optimization, Maps visibility, NAP consistency, citations, service-area pages, review strategy, and local landing pages ✅ Content refreshes, SEO content guidance, blog optimization, internal link plans, competitor gap analysis, ethical backlink strategy, and digital PR ideas Who this is for: I work best with clients who want more than generic SEO tasks: B2B SaaS, healthcare clinics, professional services, ecommerce stores, Shopify brands, WordPress sites, real estate businesses, hospitality and travel platforms, local service businesses, agencies, consultants, manufacturers, cybersecurity companies, compliance brands, art galleries, psychologists, therapists, and growing companies that need organic visibility to become a reliable source of leads. Common problems I solve: ✅ Google is not sending enough qualified traffic ✅ Pages rank for the wrong keywords or do not match buyer intent ✅ Technical SEO issues hurt crawling, indexing, speed, Core Web Vitals, or UX ✅ Content is thin, outdated, duplicated, scattered, or missing topical authority ✅ Service pages, location pages, product pages, or blog posts need stronger search intent alignment ✅ Competitors appear in Google, Maps, AI Overviews, ChatGPT, Gemini, Claude, or Perplexity while your brand is hard to find ✅ Your site needs schema, entity optimization, internal linking, and clearer answer-ready content ✅ You need an SEO roadmap that tells your team what to fix, build, optimize, and measure How I approach SEO, AEO, and GEO: First, I review site structure, indexation, crawlability, Core Web Vitals, content quality, keyword intent, internal links, schema, authority signals, analytics, competitors, and conversion paths. Then I turn findings into a prioritized action plan. You will not get vague advice like “write more blogs” or “improve SEO.” You will get specific recommendations tied to impact: which pages to optimize, which keywords and entities to target, which technical issues to fix, which schema to add, which content gaps to close, and how to track progress. For AI search, I make your brand and content easier for large language models and answer engines to understand and cite: clear entities, answer-ready content, topical coverage, structured data, source signals, authoritative pages, comparison content, FAQ sections, service explanations, and trust-building content that answers buyer questions. Deliverables can include: ✅ SEO / AEO / GEO audit ✅ Technical SEO fix list ✅ Keyword research and search intent map ✅ Entity map and topical authority plan ✅ Content strategy and optimized content briefs ✅ On-page optimization recommendations ✅ Schema markup recommendations ✅ Internal linking plan ✅ Local SEO and Google Business Profile recommendations ✅ AI visibility and LLM citation improvement plan ✅ Competitor analysis and content gap research ✅ Monthly reporting on rankings, organic traffic, leads, conversions, and AI answer visibility Why clients hire me: I think like a growth strategist, not just an SEO checklist operator. Rankings matter, but the real goal is qualified traffic, leads, sales, authority, and long-term visibility. I connect technical fixes, content improvements, analytics, conversion paths, and AI search readiness into one practical system.

I help merchants and teams launch high-converting Shopify stores, migrate legacy platforms to Shopify, and build custom Shopify apps and headless storefronts using TypeScript and React. I focus on measurable outcomes: faster page speed, smoother checkout flows, and maintainable production code. 17+ years • 50+ projects • 8000+ work hours on Upwork Services I provide: ✔ Shopify theme development & customization (Liquid, OS 2/3, responsive design) ✔ Shopify app development & integrations (Node.js, GraphQL/REST, webhooks, payments) ✔ Magento / WooCommerce → Shopify migrations (data, redirects, SEO) ✔ Headless storefronts & PWAs (React, Next.js, Hydrogen, TypeScript) ✔ Performance optimization & CRO (Lighthouse, Core Web Vitals) ✔ Dashboards & data visualizations for commerce analytics (Plotly, Chart.js) ✔ Ongoing maintenance, testing, and developer handoffs with documentation Tech highlights: TypeScript, React 18, Next.js, Vite, TailwindCSS, Shadow Elements, CDN/UI, Radix, Node.js, Express, GraphQL, Shopify Liquid & APIs, Laravel / Magento 2, Supabase, Stripe, PayPal Why hire me: ✔ Deliver production-ready stores and apps with clear milestones and tests ✔ Deep eCommerce domain knowledge: checkout, subscriptions, and payments ✔ Fast communication, documented handoffs, and reliable maintenance How I work: 1) Share your store URL or project brief. 2) I’ll send a short audit and scoped estimate (free quick audit on small fixes). 3) I deliver in milestones with clear QA and rollback plans but very much open also to hourly retainer jobs

I am a top rated freelancer and have been making games since 2010, mostly with C++, Game Maker, and Unity. Since 2013 I've worked for various clients here on Upwork (was called oDesk back then). The work I did for some of my clients involved having to learn new programming languages, these feature my flexibility. I recently made around 50 HTML5 games for an online school based in Australia - you can try eight of those for free I am particularly good at making rough game concepts into fully playable games, and can do that very quickly if the clients allows me to use Game Maker:Studio 1 or 2 for the job. I can also make small coding projects in programming languages I've never even used before if given enough time. I also do robotics and general automation with Arduino and C++ in my spare time. Even more recently I've started taking AI training data annotation and quality control tasks for both image generators and large language models - in particular code review for LLM training. I've also started teaching Game Maker:Studio lessons. These are the products that I have developed for my clients: *Android - games, other apps *HTML5 - games, other apps *iOS - games *Windows - games, tools, scientific simulations *Game Maker Studio 1 & 2 extensions (C++, javascript) *Apps and games in programming languages that I haven't learned prior to taking on their respective jobs *Autohotkey scripts for remapping keys and general automation *Python image processing tasks

About Me Hi, I’m Alex Lim, a multidisciplinary Python and Django engineer with more than 20 years of experience designing and building intelligent, automated, and full-stack systems for clients in telecom, AI, and enterprise software. My work blends engineering precision with creativity and problem-solving. I’ve developed platforms that automate workflows, manage complex data, and connect web, mobile, and IoT systems in ways that make operations faster and simpler. I started in electronics and communications engineering, moved into full-stack development, and later led research and development teams focused on innovation and AI-driven automation. I love building systems that connect ideas, people, and technology. What I Do I build reliable, scalable, and smart systems using: Backend development: Python, Django, Flask, FastAPI, GraphQL Frontend and mobile: Flutter, React, Vue, Bootstrap, Tailwind AI and automation: OpenAI API, LangChain, LocalAI, n8n, MCP Orchestration Data and integration: PostgreSQL, MySQL, MongoDB, Redis, Google Sheets, REST APIs Cloud and DevOps: AWS, Docker, Nginx, GitLab/Github CI/CD IoT and embedded systems: Arduino, Raspberry Pi, MQTT, robotics interfacing Each solution I create focuses on performance, maintainability, and long-term value. Highlighted Projects PAIR (Personal AI Remote): A cross-platform AI system that connects devices and users for seamless collaboration. NexPortal: A Django-based enterprise platform that automates telecom billing and uses AI for PDF invoice recognition. Catch-a-Gig: A job marketplace platform with credential uploads, matching algorithms, and ad dashboards. TeleBots: Telegram automation bots for provisioning, management, and telecom operations. NexSports and Traffic AI: Real-time analytics systems using Python, OpenCV, and TensorFlow for motion detection and streaming. SmartHome App: A Flutter IoT app that automates lighting and appliances with MQTT. Auto-Trader: A reinforcement learning trading bot using Python and scikit-learn. Pole Site Surveyor: A mobile and web app for geotagged telecom pole mapping and reporting. Each project was designed for reliability, documentation, and scalability. Skills and Technologies Languages: Python, Dart, JavaScript, C/C++, PHP Frameworks: Django, Flutter, Flask, FastAPI, Laravel, Node.js, React, Vue Databases: PostgreSQL, MySQL, SQLite, MongoDB, Firebase AI Tools: OpenAI API, Pandas, NumPy, SciPy, Roboflow, OCR, OpenCV Automation Tools: n8n, Zapier, Google Apps Script, ClickUp API Version Control: Git, GitLab, Bitbucket, GitHub Cloud and Containers: AWS, Docker, Nginx, VirtualBox Creative Tools: Figma, Photoshop, Illustrator, Premiere, OBS, Unreal Engine I work comfortably across the entire development stack, from backend logic to automation and design. Work Philosophy I believe great systems are built with structure, collaboration, and purpose. My workflow includes: Open and consistent communication Clean, maintainable, and well-documented code Focus on scalability, testing, and reliability Respect for deadlines and deliverables I care deeply about creating results that last and make a measurable difference. Professional Background Head of Innovations, Research, and Development at NexLogic Telecommunications Network Inc., leading AI, automation, and IoT solutions. Founder of Protodev Information Technology Solutions, developing production-ready apps and automation systems. IEEE Awardee and National Physics Olympics Champion, recognized for innovation in electronics and robotics. Guest speaker at Mapúa Institute of Technology, San Beda College Alabang, and UP Los Baños, teaching and inspiring students in software, AI, and microcontroller projects. Experienced mentor, educator, and team leader with a passion for innovation and creativity. Let’s Work Together I’m based in the Philippines and open to remote or hybrid collaboration. I bring hands-on technical experience, strong documentation habits, and a commitment to building systems that run smoothly and scale easily. If you’re looking for someone who can design, build, and manage complex systems end to end while ensuring real-world reliability and innovation, let’s connect and discuss how I can help bring your project to life.