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Senior Back-End Engineer | C, C++, Java, Spring Boot, Python, SQL | AI Hi! I'm Jomar, an experienced software engineer specializing in building AI-powered solutions and high-performance systems. With over 8 of hands-on experience in C, C++, Rust, Java, Python, and SQL, I am passionate about creating efficient, scalable, and intelligent systems that solve complex real-world problems. I thrive on optimization - whether it's making your existing code run faster or designing algorithms that outperform the competition. From data science to machine learning, I use my skills to build end-to-end solutions that integrate seamlessly into your workflow. 🔹 What I Do: - C/C++, Rust Development: I build high-performance, memory-efficient applications that power critical systems. - Java Development: From enterprise solutions to desktop and mobile apps, I craft robust and scalable Java applications. - Python & SQL for Data Engineering: I leverage Python for AI/ML workflows and SQL for efficient data handling, storage, and manipulation. - Machine Learning & AI: I design and implement custom machine learning algorithms, neural networks, and AI systems tailored to your unique needs. - System Optimization: I focus on optimizing code and algorithms to achieve maximum efficiency, reducing latency, and improving system scalability. 🔹 Why Choose Me: - Deep Technical Expertise: I have a multidisciplinary background in software engineering and AI, so I can handle both low-level systems programming and high-level AI-driven applications. - Collaborative & Transparent: I work closely with my clients to ensure project success, providing regular updates, clear communication, and results that meet your business objectives. - Solution-Oriented Mindset: My goal is always to deliver solutions that are practical, scalable, and sustainable - focused on long-term performance and success. Let's work together to transform your ideas into powerful, intelligent systems that drive your business forward. I'm ready to help you achieve your next breakthrough!

👋 Hi! I’m Christian — a Civil Engineer, Structural Designer, Quantity Surveyor, Virtual Assistant, and QA Tester with over 5 years of experience as A Freelancer in Upwork supporting startups, contractors, and businesses with technical, analytical, and operational tasks. My core expertise is in Civil Engineering, where I focus on delivering accurate structural, quantity, and drafting outputs using industry-standard tools and engineering practices. 🧩 Core Civil Engineering Services (Priority) 📊 Quantity Surveying & Cost Estimation Using PlanSwift, I conduct detailed quantity take-offs, material estimation, and cost analysis to support budgeting, bidding, and project planning. 🏗️ Structural Modeling & Analysis Using MIDAS, I perform structural modeling, analysis, and design support for residential and commercial projects, ensuring structural integrity, safety, and compliance with engineering standards. 📐 2D Drafting & CAD Works Using AutoCAD, I create precise architectural and structural drawings, including plans, layouts, sections, and technical details for construction documentation. 🧩 Additional Support Services Virtual Assistance Inbox and calendar management, data entry, transcription, research, scheduling, and reporting. Lead Generation & Outreach Prospecting, CRM management, and cold email outreach using various sales and research tools. Quality Assurance (QA Testing) Manual testing, bug reporting, usability testing, cross-browser/device testing, and documentation. Project Management Support Task coordination, timeline tracking, and workflow management using project management systems like Trello, Asana, ClickUp, Monday-style tools, MS Project, and Primavera. Social Media Support Content scheduling, captions, engagement, and performance tracking across major social platforms. Customer Support Email and chat support with a focus on response quality, accuracy, and professionalism. 🧩 Tools I Work With Civil Engineering Software: MIDAS, AutoCAD, PlanSwift, STAAD, MS Project, Primavera Lead Generation Tools: LinkedIn Sales Navigator, Apollo, Lusha, Hunter-style tools, CRM systems CRM & Project Management: HubSpot, Salesforce, Zoho, Pipedrive, Trello, Asana, ClickUp, Monday-style platforms, Notion QA Tools: Jira, TestRail, Browser-based testing tools, Postman, Zephyr Productivity Tools: Google Workspace, MS Office, Dropbox, Calendly, Grammarly Social Media Tools: Canva, CapCut, Hootsuite, Buffer, Meta Business Suite 📩 Let’s work together to deliver accurate engineering outputs, improve project workflows, and support your business operations efficiently—so you can focus on growth and execution 🚀

🏆 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 increase ROI and ROAS by fixing and optimizing their conversion tracking so ad algorithms can work at their full potential. I specialize in Google Tag Manager and server-side tracking to overcome ad blockers, iOS privacy restrictions, and browser limitations ensuring your data is accurate and reliable. With clean, high-quality tracking in place, I feed the right signals into ad platforms, unlock better optimization, and provide actionable insights through ad managers and Google Analytics to drive smarter decisions and higher conversions.

I’m a self-driven software engineer specializing in data engineering, API integration, and AI-powered automation. I design and build scalable solutions that streamline processes, reduce manual work, and deliver measurable business impact. With experience working across multiple client projects, I apply best practices in software development to create efficient, reliable, and production-ready systems. My core expertise includes: • Data Engineering & Automation (ETL, pipelines, process optimization) • API Integration & System Connectivity • AI Automation & Workflow Optimization • Python Automation • VB.NET and C# Development • Microsoft SQL Server and Oracle PL/SQL • SSRS and Reporting Solutions • Oracle APEX Development • Azure, GitHub, and GitLab • Infrastructure, Servers, and Virtual Machines • IT Systems, Troubleshooting, and Technical Support • Basic Cybersecurity & System Hardening • Hexagon Software Programming and Administration

Melmar here! An up-and-coming star freelancer. I am a Senior Full-Stack & Mobile Engineer with 9+ years of experience building scalable mobile applications, SaaS platforms, and AI-powered products for startups and enterprises. I specialize in developing high-performance mobile apps for iOS and Android using both cross-platform and native technologies, including React Native, SwiftUI, and Kotlin. I also build modern web platforms and scalable backend systems. Over the years, I have delivered 50+ mobile and web applications across industries, including fintech, SaaS, healthcare, real estate, AI products, and social platforms. I can help take your product from idea to production, including architecture, development, deployment, and scaling. What I Can Help You Build • Cross-platform iOS & Android apps (React Native) • Native iOS apps using SwiftUI • Native Android apps using Kotlin • Full-stack SaaS platforms and dashboards • Backend APIs and microservices (Node.js) • AI integrations (computer vision, speech-to-text, automation) • Payment systems and subscriptions (Stripe) • Real-time and scalable cloud-based applications • Startup MVP development and product scaling I focus on building clean, scalable, and maintainable systems that are ready for growth. Whether you're launching a new startup MVP or scaling an existing application, I deliver high-quality solutions with clear communication and reliable timelines. If you need a developer who can build both mobile apps and full-stack platforms, I would be happy to discuss your project. Cheers.