US Navy Veteran with a passion for information systems, software development, and game design. Professional C# developer for over 10 years. Whether you're trying to maintain old code, design new systems, or just need a second set of eyes or hands, I'm here to help solve your problems.

I am a System's Engineer living in Argentina and I have been working as a Senior Software Engineer for the past 9+ years. These are some projects I have worked on: jBilling: Canadian company that has a Complex Billing System ideally for Telco companies or any company that sell services based on subscriptions. Stack: Java J2EE, Grails, Hibernate, Spring, Hbase, Hadoop, ActiveMQ, RabbitMQ, Apache Velocity, Jasper Report, jQuery, HTML, CSS and PostgreSQL Taaxii: Argentinean Company that has a solution for Travel Logistics for Company Employees. Stack: Java J2EE, Hibernate, GWT, Ibatis, Android, iOS, MySQL, AWS EC2, AWS S3, AWS RDS and Other AWS Services. Evolticom: Sweedish Company that had a CRM Web Solution. Stack: Grails, Bootstrap and PostgreSQL. DXC: Former HPE area where I worked with them to implement jBilling for the City of Dubai. FusionSleep: US Company that had a solution to control Truck drivers sleep behaviors. Stack: Grails, HTML, CSS and PostgreSQL. Autoentrada: Argentinean Company with a web solution for selling theater tickets online. Stack: Java J2EE, Struts, Ibatis, Jasper Report, HTML, CSS, PostgreSQL. Workia: Argentienan Company specialized in Human Resources Management. Stack: Java J2EE, Spring Boot, Angular JS, Microservices, HTML, CSS. SouthWest Airlines: Main US Low Cost Airline Company. I was involved in migrating existing applications to Java Web based solutions. Stack: Java J2EE, Spring, Spring MVC, Hibernate, HTML, CSS, Grails. Main roles and responsabilities I was involved in these projects: Analysis, Technical Design, Development, Testing, Team Leader, Technical Leader, DevOps.

🚀 With 12+ years of experience, I’ve helped businesses save up to 30% in development costs while delivering high-performance web and mobile apps. Let’s build solutions that not only meet your needs but also drive your bottom line! I specialize in designing, developing, and scaling custom SaaS platforms, AI-driven applications, and enterprise-level mobile and web solutions. Whether you're launching a startup or optimizing an existing product, I bring technical excellence and a business-driven approach to every project. || Core Expertise & Services 🔹 Full-Stack Web Development Scalable web apps with React.js, Next.js, TypeScript, and Node.js High-performance backend architecture using Express.js, Laravel, Python, and GraphQL Database design & optimization (MongoDB, PostgreSQL, MySQL) 🔹 Mobile App Development Cross-platform mobile apps with React Native & Flutter Native iOS & Android development using Swift & Kotlin Seamless UI/UX with optimized performance 🔹 AI & SaaS Development AI-powered automation & chatbot development OpenAI, LangChain, and predictive analytics integrations Scalable SaaS solutions with secure API architecture 🔹 API Development & Third-Party Integrations REST, GraphQL & WebSocket API development Secure payment gateway integrations (Stripe, PayPal, Braintree) Cloud & DevOps solutions using AWS, Google Cloud, and Azure 💼 Imagine cutting your project timeline by 40%! With my expertise in full-stack development and AI, I create scalable applications that deliver real results. Partner with me and watch your ideas come to life while saving you time and money! || Recent Projects & Case Studies ✅ AI-Powered Resume Builder – SaaS platform with OpenAI-powered content automation ✅ Live Video Streaming App – WebRTC-based real-time video broadcasting ✅ Enterprise Workflow Automation – Streamlined business operations via API integrations ✅ E-Commerce Marketplace – Scalable, multi-vendor platform handling thousands of transactions ✅ Fintech & Healthcare Solutions – Secure apps with regulatory compliance 📈 Clients have seen revenue growth up to 50% through my tailored SaaS and mobile solutions. With 12+ years in the industry, I focus on creating cost-effective, high-quality applications that generate value. Ready to take your project further? || Tech Stack & Tools 🔹 Frontend: React.js, Next.js, Vue.js, TypeScript 🔹 Backend: Node.js, Express.js, Laravel, Python 🔹 Mobile: React Native, Flutter, Swift, Kotlin 🔹 Databases: MongoDB, PostgreSQL, MySQL, Firebase 🔹 Cloud & DevOps: AWS, Google Cloud, Azure, Docker, Kubernetes 🔹 AI & Web3: OpenAI API, LangChain, Solidity, Web3.js || Why Work With Me? ✔️ 12+ Years of Experience in end-to-end product development ✔️ Scalable, performance-driven applications built for growth ✔️ AI & automation expertise for modern business needs ✔️ Transparent communication and a problem-solving approach ✔️ Long-term collaboration & post-launch support 📩 Let’s Discuss Your Project I’m available for new projects and long-term collaborations. Contact me today to explore how we can build something exceptional together!

I am a skilled Data Engineer having with expertise in building scalable data solutions and optimizing processes on Azure and AWS cloud platform. With a strong background in both healthcare, retail and CPG data processing and analytics, I have successfully developed ETL jobs, implemented data validation frameworks, and collaborated with cross-functional teams to deliver impactful data-driven insights. My commitment to continuous improvement and leveraging cutting-edge technologies enable me to exceed client expectations

I'm a results-driven Software Engineer with over 12 years of experience in full-stack development, system architecture, and API optimization. I have a proven track record in enhancing system performance, leading high-scale projects, and effectively bridging the gap between business needs and technical solutions. My expertise spans cloud computing, mobile development, DevOps, and database optimization, ensuring seamless deployment and system reliability. I'm recognized for mentoring teams, optimizing processes, and delivering cost-efficient solutions across various industries. I'm passionate about creating scalable, efficient solutions that solve real-world problems and enhance user experiences. My approach combines technical excellence with business acumen to deliver results that exceed expectations.

I’m a seasoned Java/Python Technical Lead with 10+ years of experience building high-performance, scalable, and secure software solutions for financial services, OTT security, and e-commerce businesses. Whether you need a robust backend system, microservices architecture, cloud-native platform, or performance optimisation, I can help. - Experienced in Java, Spring Boot, Python, FastAPI, Pydantic, microservices, REST APIs, Redis, Hazelcast, Kafka, RabbitMQ, PostgreSQL, MySQL, AWS services, Docker, and Kubernetes. - Strong background in leading complex project deliveries for companies such as Morgan Stanley, Irdeto, Tekion, and more, with a focus on resilient architecture, clean code, and meeting demanding SLAs. - Full project ownership from architecture and development to deployment, optimisation, and team guidance. - Clear and regular communication is important to me, so let’s stay aligned throughout the project.

I'm a Software and DevOps engineer with over 20 years experience. I'm great with people and love to help fill your technical needs. I've worked professionally as Software Developer and Engineering Leader for companies like Anaconda, Starbucks, and Avvo. - I'm an expert in Ruby, Python, Javascript/TypeScript and Rust - I love working with non-technical people - I am a big fan of direct and clear communication, so I'll make sure we talk regularly and keep you up to date.

I am Shubhadeep Roychowdhury from India, a seasoned professional with over 19 years of extensive experience in various critical and time-sensitive projects. My expertise spans across multiple domains including Big Data analysis, web development, and advanced machine learning. Currently, I lead the Data Science division at Spottedzebra, where I manage and develop cutting-edge NLP models and LLM-based applications. My prior roles include Senior Data Scientist at Kpler SAS, Senior Software Engineer at Robocorp Inc., and CTO at CodistAI, where I have consistently delivered impactful and scalable solutions. My technical skills encompass a wide range of technologies and languages including Python, Go, C, C++, JavaScript, PHP, and Rust. I have a deep understanding of cloud platforms (AWS, GCP), containerization (Docker, Kubernetes), and version control systems (Git). Additionally, I am proficient in various machine learning frameworks (TensorFlow, PyTorch, Keras), data engineering tools (Apache Beam, Kafka, Redis), and database systems (MySQL, PostgreSQL, MongoDB, DynamoDB). I am an avid technologist and a quick learner, always eager to explore new horizons and listen to innovative ideas. Client communication and successful, timely project delivery are my core strengths. Throughout my career, I have architected and implemented numerous high-value projects, both in my professional roles and as a top-rated freelancer on platforms like Upwork. If you are looking for a world-class professional to bring your project from concept to execution, please review my skill set and reach out. Till date I have worked on 30+ projects in Upwork and earned more than $60k with raving reviews from my clients. I had taken a break and now I am back to Upwork with even better skills and more experience under my belt. I am confident that my experience and expertise will exceed your expectations.

🥇𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐀𝐈 𝐚𝐧𝐝 𝐌𝐋 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 🏆 𝟓+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐰𝐨𝐫𝐤 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐰𝐢𝐭𝐡 𝐢𝐧𝐭𝐞𝐫𝐧𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 ⭐ 𝟏𝟎𝟎% 𝐜𝐥𝐢𝐞𝐧𝐭 𝐬𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 🌟 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 𝐨𝐟 𝐪𝐮𝐚𝐥𝐢𝐭𝐲 𝐰𝐨𝐫𝐤 𝐞𝐱𝐜𝐞𝐞𝐝𝐢𝐧𝐠 𝐞𝐱𝐩𝐞𝐜𝐭𝐚𝐭𝐢𝐨𝐧𝐬 As an AI/ML Engineer skilled in Python, Deep Learning, LLMs, RAG, and chatbots like Claude, I build smart solutions to solve complex problems efficiently. ----------------------------------------------------------------------------------------------------------------- I use 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈, 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠, 𝐍𝐚𝐭𝐮𝐫𝐚𝐥 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞 𝐏𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠, 𝐃𝐞𝐞𝐩 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠, 𝐚𝐧𝐝 𝐯𝐚𝐫𝐢𝐨𝐮𝐬 𝐚𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐥𝐢𝐤𝐞 𝐂𝐡𝐚𝐭𝐆𝐏𝐓, 𝐎𝐩𝐞𝐧𝐀𝐈, 𝐋𝐚𝐫𝐠𝐞 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞 𝐌𝐨𝐝𝐞𝐥𝐬, 𝐋𝐋𝐚𝐌𝐀, 𝐚𝐧𝐝 𝐋𝐋𝐚𝐌𝐀𝟑 to transform operational processes, optimize task automation, and improve customer engagement. 𝐓𝐨𝐨𝐥𝐬 𝐚𝐧𝐝 𝐟𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬 🔷Machine Learning ➤Churn prediction and A/B testing ➤Regression analysis including Linear, Logistic, etc. ➤Classification Algorithms including SVM, KNN, etc. ➤Clustering like K-Means, and Hierarchical Clustering ➤NLP and CNN ➤Hyperparameter Tuning ➤Model Deployment and Data Preprocessing ➤Data Augmentation and Data Acquisition ➤Time Series Forecasting 🔷 Programming Languages and Libraries ➤Python, SQL, Numpy, Pandas, Scikit-learn, TensorFlow, Keras, OpenCV. Data Visualization: Matplotlib, Seaborn, Plotly, Tableau, Power BI. 🔷Big Data and Databases: ➤SQL query optimization, MySQL, PostgreSQL, MongoDB. 🔷AI & Deep Learning: ➤AI solutions, neural networks, RNN, LSTM, autoencoders, transfer learning, image processing, object detection. 🔷Model Evaluation and Metrics: ➤Accuracy, precision, recall, F1-score, ROC curves, cross-validation, confusion matrix. My expertise includes: =========================================== ➤AI/ML Model Development ➤Chatbot Development ➤LLM Integration ➤RAG Systems ➤NLP Solutions ➤Deep Learning Models ➤AI Automation ➤Data Analytics 𝐌𝐲 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐬𝐤𝐢𝐥𝐥𝐬 𝐜𝐨𝐦𝐩𝐫𝐢𝐬𝐞: ☛Skilled in developing supervised and unsupervised models ☛Experienced in computer vision and NLP architectures ☛Proficient with TensorFlow, PyTorch, and scikit-learn ☛Skilled in building bots with Rasa and Dialogflow ☛Experienced with Claude ☛Committed to staying updated on AI/ML trends ☛Efficient in writing maintainable code ☛Proficient in CNNs, RNNs, and transformers 𝐀𝐬 𝐚𝐧 𝐀𝐈 𝐚𝐧𝐝 𝐌𝐋 𝐞𝐱𝐩𝐞𝐫𝐭 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐃𝐞𝐞𝐩 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠, 𝐋𝐋𝐌𝐬, 𝐑𝐀𝐆, 𝐚𝐧𝐝 𝐜𝐡𝐚𝐭𝐛𝐨𝐭𝐬, 𝐈 𝐝𝐞𝐯𝐞𝐥𝐨𝐩 𝐚 𝐯𝐚𝐫𝐢𝐞𝐭𝐲 𝐨𝐟 𝐢𝐧-𝐝𝐞𝐦𝐚𝐧𝐝 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬, 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠: ➡Chatbots and Virtual Assistants ➡Customer support bots for businesses ➡Predictive Analytics Tools ➡Financial forecasting applications ➡Recommendation Systems ➡Product recommendations for e-commerce ➡Analysis tools for social media monitoring ➡Text summarization for news articles or reports ➡Automated Document Processing ➡Image Recognition Systems ➡Applications in healthcare ➡Object detection systems for retail or security ➡RAG Systems ➡AI-Powered Workflow Automation 𝐓𝐡𝐞 𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐈 𝐨𝐟𝐟𝐞𝐫 𝐮𝐬𝐢𝐧𝐠 𝐦𝐲 𝐬𝐤𝐢𝐥𝐥𝐬 𝐢𝐧 𝐀𝐈/𝐌𝐋, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐃𝐞𝐞𝐩 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠, 𝐋𝐋𝐌𝐬, 𝐑𝐀𝐆, 𝐚𝐧𝐝 𝐜𝐡𝐚𝐭𝐛𝐨𝐭𝐬 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ↳AI/ML Model Development: Custom machine learning models for predictions or automation. ↳Chatbot Creation: Intelligent bots for customer support and automation using LLMs like GPT or Claude. ↳LLM Integration: Fine-tune and implement large language models for various tasks. ↳RAG Systems: Combine LLMs with external data for more accurate results. ↳NLP Solutions: Text analysis, summarization, and sentiment analysis. ↳Deep Learning Models: Neural networks for image recognition, classification, or forecasting. ↳AI Automation: Automate business workflows using Python-based AI tools. ↳Data Analytics: Insights and predictions from complex datasets. ----------------------------------------------------------------------------------------------------------------- Python | SQL, JavaScript | AI/ML Model Development | Supervised and Unsupervised Learning | Deep Learning | CNNs | RNNs | LSTMs | Open CV | TensorFlow | PyTorch | Keras | Large Language Models (LLMs) | GPT | Claude | Retrieval-Augmented Generation (RAG) | Chatbot Development | Rasa | Dialogflow | Natural Language Processing (NLP) | Data Analytics | Pandas | NumPy| Matplotlib | Model Optimization | Fine-tuning | Bash/Shell scripting | Seaborn | Tableau | Power BI | Hadoop |Spark ----------------------------------------------------------------------------------------------------------------- 📞Do you have an idea about innovative AI product and do not know how to convert it into design? Feel free to contact me anytime to help grow your business.

Hello! I am Duncan, a full-stack JavaScript and Go software engineer with seven years of experience My top skills are JavaScript (NodeJS, TypeScript, and VueJS), Go, AWS, GCP, and Serverless architectures with GCP and AWS. I have a Bachelor's degree in Computer Science from the University of Nairobi and graduated with First Class Honors. I design, develop and deploy web applications as both a front-end a back-end engineer. I am a highly reliable freelancer, with client satisfaction being my driving goal