With over 10 years of hands-on experience in architecting, automating, and optimizing mission-critical applications in AWS, I help businesses streamline their infrastructure, reduce operational overhead, and launch faster. From startups building their first cloud environment to enterprises modernizing legacy systems—I bring a track record of delivering impactful results. What I bring to your project: • Cloud Infrastructure Design & Automation ☁️ I specialize in Infrastructure as Code (IaC) using AWS CloudFormation and Terraform, enabling repeatable and robust infrastructure. • Serverless & Scalable Backends ⚙️ I’ve architected and launched serverless applications using Lambda, API Gateway, DynamoDB, ECS Fargate, and much more—powering everything from AI tools to mobile games with thousands of daily users. • DevOps & CI/CD Pipelines 🚀 I build fully automated pipelines to accelerate your development lifecycle, reduce errors, and ensure fast, reliable deployments. • Python-Powered Solutions 🐍 From automation scripts to backend services, I leverage Python to drive efficiency and innovation. • Cloud Security & Cost Optimization 🔐💰 I ensure your environments are secure, compliant, and cost-effective. I’m passionate about helping businesses get the most out of the cloud. Whether you’re launching a new product, modernizing infrastructure, or looking to optimize for scale, I’m here to help you succeed.

I design and build scalable, intelligent systems that empower businesses to streamline operations, automate workflows, and innovate faster—leveraging the full power of the Microsoft ecosystem. With deep expertise in .NET C#, Azure, Dynamics 365, and Power Platform, I specialize in building end-to-end solutions that bridge technology with business outcomes. From PowerApps and Power Automate to custom connectors, coded components, and web parts for SharePoint, I create solutions that extend platform capabilities and deliver real results. Beyond my hands-on development skills, I bring strong project leadership and systems thinking to every engagement. I’ve led full project lifecycles, from architecture to deployment and built best practices for sustainable, high-performing development teams. What sets me apart is my ability to translate complex technical requirements into actionable, business-focused solutions. I don’t just build systems, I solve real problems, reduce development time, and enable my clients to move faster with confidence. If you're looking for a developer who understands both the code and the context, let's connect and build something impactful together.

I am an expert software engineer and technical leader, with 20+ years of professional experience across a wide variety of industries, including telecoms, fintech, food and real estate. I work across the stack in several languages. My preferred (expert) stack includes: ✔️Backend (C#, NodeJS) ✔️Web (ReactJS, NextJS, vanilla Javascript) ✔️Mobile (React Native) ✔️Database (SQL Server, PostgreSQL, MongoDB) ✔️Devops & CI/CD (AWS, CircleCI, Terraform) I can work with lean, agile and test-driven approaches, design and architect complex technical systems and have experience leading teams of up to 12 engineers. I am open to: ⦿ Application design and architection ⦿ Software development and coding ⦿ Mentoring and team leadership ⦿ Technical and product strategy ⦿ Technical hiring and interviewing

Experienced full-stack developer with a strong background in building high-performance applications across multiple programming languages and frameworks. With expertise in PHP, Python, Perl, Node.js, Java, C/C++, JavaScript, .NET, and Delphi/Pascal, I specialize in developing scalable web applications, backend services, and desktop solutions. I have a proven track record of delivering secure, efficient, and well-optimized code, whether working on legacy systems, API development, database management, or cloud-based solutions. 🔹 Backend & API Development – RESTful APIs, microservices, server-side scripting 🔹 Full-Stack Web Development – Frontend and backend expertise in multiple languages 🔹 Desktop & Enterprise Applications – C/C++, Delphi/Pascal, .NET solutions 🔹 Performance Optimization & Debugging – Code efficiency, troubleshooting, and bug fixes 🔹 Database Management – MySQL, PostgreSQL, MongoDB, and more Ready to bring my expertise to your project—let’s build something great! 🚀

Do you face challenges or have growth and scale goals in your business that technology could solve? Whether it’s an innovative idea or a need for automation, I’m here to help turn your vision into reality. With over 23 years in the IT field, my goal is to add value to your projects through strategic process improvement and business automation. I specialize in technologies, including Artificial Intelligence (like GPT and Stable Diffusion) and Software Development to provide customized solutions Whether it’s developing a web or mobile app, or integrating APIs and systems for a seamless workflow, I have the expertise to enhance your business operations and free up your time. Let's collaborate to grow your business! My diverse experience spans several industries including construction, financial institutions, education, online sales, HR, SEO/marketing, and government. This varied background enriches my approach, allowing me to bring unique perspectives and solutions to each project. As a full-stack developer, my skills encompass both backend and frontend technologies, ensuring a comprehensive development strategy. I’m excited to connect with you and explore how we can drive success in your business through innovative technology solutions. My core expertise lies in maximizing the potential of the Google Workspace platform. From developing custom software solutions, integrating with external platforms and APIs, and incorporating AI and Generative AI into workflows. Additionally, I will add value creating insightful dashboards and managing administrative tasks to streamline business operations. Since 2009, I have been deeply involved with Google Workspace, starting when it was known as “Google for Work” and evolving alongside it to today’s “Google Workspace”. Over these years, I’ve successfully managed environments exceeding 200 active accounts, demonstrating a strong track record in leveraging Google Workspace for operational excellence. My experience: 💻 CUSTOM SOFTWARE & APP DEVELOPMENT: * For Google Workspace: - Language: Google Apps Scripts, Javascript and Google APIs - For Web & Mobile: + AppSheet + ReactJs (authentication with google Sign-In ), HTML, CSS, MaterialUi + Bootstrap: Webapps + Ionic, Capacitor to create Webapp, Android, IOS + Google Spreadsheets as Data Storage + Google Drive as File / Images / Videos / Document storage + Servers: Firebase, CloudFlare + Automations: + PDF’s forms filled + Extract GPS information from images + Document fill: Docs, Spreadsheets, Slides + WebScraping * In general - For Web & Mobile: + ReactJs, Javascript, HTML, CSS, MaterialUi, JQuery, Bootstrap + Ionic, Capacitor to create Webapp, Android, IOS + Databases: Airtable, MySQL ( SQL, DDL, DML, stored procedures, functions) + Servers/Platforms: Firebase, CloudFlare, Digital Ocean, Siteground + Data Science: Python, R, MongoDB, Google Colab, R Studio, WebScraping + Implementations: * Mifos - Fineract CoreBanking: Front/BackEnd, reports fine tuning, data migration * Stable diffusion server with enabled API: server setup and API * Wordpress sites migration / implementation 🤖 API INTEGRATION & AUTOMATION TOOLS: * Google APIs: - Workspace: Spreadsheets, Docs, Slides, Forms, GMail, Google Chat - General: Apps scripts, Google Ads, Google Search API, Maps, Google Sign In integration (React and JS oAuth), AI - OpenAI: Text generations models as GPT-4, GPT-4-1106-preview, gpt-3.5-turbo-1106 - Anthropic: claude2 - Stable diffusion API (trough Fast API) - Openrouter - Communications: + Twilio: SMS, Calls, SIP server, IVRs, Studio, functions + Crisp Messaging Platform API - Payment / Sales: + GetDPD API and Webhooks + Shippo API - Getting data: + Scrape API & Cheerio + Spotify - Banking / CrediScoring: + Unykoo / Kiban APIs: + Credit Scoring and workflow to choose funds - Integration/Automation tools: + Make.com Platform (Integromat) + Zapier 🔗 Past experiences: * Languages: PHP, Perl, Ajax, Visual Basic, Visual Studio, FoxPro, VBA, MsAccess * Databases: Oracle, Postgresql, MsAccess * Servers/Platforms: Linux, Solaris, BSDs, Apache WebServer, Tomcat * CMS: Joomla (implementation and code editing) * Financial Institutions: - CoreBanking software: Mifos / Fineract - Credit Management System: CrediERP - Credit Bureau Reports * Security - Firewall: checkpoint, iptables - Kaspersky Endpoint Security - Fortinet / Fortiview

I'm a Senior Web Developer with over 10 years of experience building and maintaining web applications using open-source tools — primarily Python/Django on the backend. I thrive in complex, real-world environments, especially those involving legacy systems where others hesitate to dive in. Refactoring and modernizing old codebases is something I genuinely enjoy and excel at. While backend development is my main focus, I’ve also taken on some frontend tasks using Vue.js when the project required it. I contributed to improving frontend unit test coverage and helped streamline data handling through better state management. Lately, I’ve been exploring the world of AI Agents and how they can be integrated into real applications. It’s an exciting new area that I’m actively learning and experimenting with. I'm looking for a challenging Senior Web Developer role where I can apply my deep understanding of backend systems, help untangle legacy code, and grow in areas like AI-driven development.

Welcome to My Profile! I am a Software Developer, Software Architect, DevOps-AWS Engineer, and AI Strategist with 17+ years of experience delivering scalable, high-performance IT solutions across diverse domains using agile and DevOps practices. 🔍 Key Expertise ✅ Third-Party API Integrations – Proven experience integrating complex systems, including Amazon SP-API, for large-scale data operations ✅ AI & Automation – Proficient in integrating ChatGPT (3.5/4), custom NLP pipelines, AI-driven solutions, and automation accelerators like Cursor in My Coding for faster development cycles ✅ Highly Scalable System Architecture – Expertise in fault-tolerant design, high-availability systems, and microservices ✅ DevOps & Cloud Engineering – Strong command over AWS, Kubernetes, Docker, CI/CD pipelines, infrastructure as code, and system monitoring ✅ Data & Analytics – Real-time data streaming, analytics, and visualization using Power BI and other modern BI tools ✅ Business & Technology Strategy – Critical thinking applied to coding, system architecture, and business-focused problem solving 📈 Experience Snapshot 🔹 9+ Years – Full-Stack JavaScript (Node.js, Express.js, React.js, Vue.js) 🔹 6+ Years – DevOps Engineering (AWS, CI/CD, Docker, Kubernetes) 🔹 6+ Years – AWS (EKS, Lambda, S3, RDS, IAM, CloudFormation) 🔹 9+ Years – Java/J2EE (Spring Boot, Hibernate, Struts, REST/SOAP) 🔹 3+ Years – PHP Frameworks (Laravel, CodeIgniter, CakePHP) 🔹 2+ Years – Hybrid Mobile (React Native, Apache Cordova) 🛠 Technical Skills Languages & Frameworks: JavaScript, Node.js, React.js, Vue.js, Java, Spring Boot, PHP, Laravel DevOps & Cloud: AWS (EKS, EC2, Lambda, S3, RDS), Docker, Kubernetes, GitHub Actions, Jenkins Middleware & ORM: Sequelize, TypeORM, Hibernate AI & Automation: ChatGPT (3.5/4), NLP-based tools, Resume Parsing Engines, Cursor-enhanced coding Databases: MySQL, PostgreSQL, MongoDB, Oracle Frontend & UX: HTML5, CSS3, Bootstrap, jQuery, GSAP, Figma, Sketch Project Delivery: Agile-Scrum, Proposal Writing, Execution & Delivery Strategy API & Auth: REST, GraphQL, OAuth, JWT, Webhooks I am proactive, communicative, and outcome-oriented, with a strong focus on business development, strategic architecture, and delivering quality at speed. 📩 Let’s connect and discuss how I can help accelerate your product success with my technical and strategic expertise! Regards, Vijay Rajagopalan

Focused entirely on designing crypto trading algorithms, creating custom trading signal generation models, training, and testing on Nvidia hardware. I was trained classically, writing C and C++ code for Wall Street trading powerhouses like Goldman Sachs and Lehman Brothers. Running on advanced Unix systems, these lightning fast applications pioneered the field of today’s realtime global Fintech. As the Internet spawned open source platforms like Linux, MySQL, NodeJS, and AWS Cloud API’s, my skillset evolved into a full stack portfolio, where I built powerful back-end server software and the front-end web portals to deliver large, complex datasets via intuitive web portals. The maturing of JavaScript as the main language of the web, both on the front and back ends, has validated my decision to adopt NodeJS as my main coding platform in 2011. Today, JavaScript forms the glue of most of my applications, running on Node on the server, and in the browser up front. After moving to the West Coast in 2016, and spending time in Silicon Valley, I ventured away from financial systems to innovative applications like Blockchain Protocol coding and Video Streaming/Ffmpeg. I also coded network traffic optimization software down to the fundamental layers of the TCP/IP stack. All these big data applications naturally led me into the design and coding of custom algorithms. Whether compressing/chunking a video stream to play on a low powered mobile device, parsing network packets for suspicious traffic, or generating large NACHA files, the ability to code an algorithm in plain C can make the difference between a successful production deployment, and non-performant code that never leaves the github repo. From my early career, I have made Database structure the centerpiece of my application design. Again, classical training in Dr. E. F. Codd’s model of Relational Databases has always informed my philosophy of how to structure an application’s data repository. With web-scale data, this field has grown to NoSQL and Graph databases. Now, huge datasets underpin the training of AI/ML models. I have kept my skills updated on these data technologies, and I combine the relevant elements of each to define the most appropriate data repository for my software.

Hey there!👩🏻‍💻 I have an experience with Python over 4 years and it is my ultimate tool for streamlining, optimizing, and improving processes. 🔎 Need to automate a repetitive task? I have expertise in building custom automation and data scraping solutions using Python frameworks like Selenium, BeautifulSoup and Requests. I can whip up a script that'll save you hours. 🔎 Data Extraction: Looking for insights from data? Based on what you're looking for, I'll help you gather the information and create a program in EXE format that'll allow you to manage the scrapper yourself easily! 🔎 Custom Solutions: From small tools to big applications, I'm all about creating solutions that work for you. ✨ Quality Over Quantity: I believe in doing things right. Every project gets my full attention. ✨ Punctuality is Key: Deadlines are important, and I respect them. ✨ Here for You: Got a question? Need some advice? Just want to chat about Python? I'm here for it! Please don't hesitate to contact me with any questions or clarifications. I'm here to help make sure your project is a success!

🏆 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗲𝘅𝗽𝗲𝗿𝘁 with 𝗝𝗮𝘃𝗮, 𝗖#, and 𝗚𝗼 🏆 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 Talent at Upwork 🏆 100% Job Success 🏆 The most adaptable 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 you can find on this platform 🏆 Long-term satisfied clients I’m a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 with over 𝟴 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 building scalable, secure, and reliable software solutions. My expertise lies in 𝗝𝗮𝘃𝗮, 𝗖#, and 𝗚𝗼, and I’m passionate about delivering high-quality systems that solve real-world problems and exceed client expectations. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲: ⭐️𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: I’ve built robust APIs, microservices, and backend systems that are designed for performance and scalability using Java, C#, and Go. ⭐️𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲-𝗚𝗿𝗮𝗱𝗲 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: I’ve worked on complex systems across industries like 𝗵𝗲𝗮𝗹𝘁𝗵𝗰𝗮𝗿𝗲, 𝗲-𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗲, 𝘁𝗼𝗹𝗹𝗶𝗻𝗴 and in small amounts of 𝗳𝗶𝗻𝘁𝗲𝗰𝗵, always focusing on reliability and usability. ⭐️𝗖𝗹𝗼𝘂𝗱 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: I’m skilled at leveraging platforms like AWS, Azure, and Google Cloud to ensure seamless scalability and exceptional performance. ⭐️𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: From relational (SQL) to NoSQL databases, I ensure data is stored securely and efficiently. ⭐️𝗔𝗴𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲𝘀: I follow Agile and DevOps methodologies to deliver results iteratively, keeping clients in the loop every step of the way. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸: ⭐️𝗖𝗹𝗲𝗮𝗿 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: I value open and transparent communication to make sure we’re always aligned with your vision. ⭐️𝗖𝗹𝗲𝗮𝗻, 𝗠𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 𝗖𝗼𝗱𝗲: I write code that’s not just functional but also easy to maintain and scale for the future. ⭐️𝗢𝗻-𝗧𝗶𝗺𝗲 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆: I’m committed to meeting deadlines without compromising quality—your success is my priority. 𝗠𝘆 𝗧𝗼𝗼𝗹𝗸𝗶𝘁: 🚀𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀: Java, C#, Go 🚀𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: Spring Boot, ASP.NET Core, Gin 🚀𝗗𝗲𝘃𝗢𝗽𝘀 𝗧𝗼𝗼𝗹𝘀: Docker, Kubernetes, CI/CD pipelines 🚀𝗖𝗹𝗼𝘂𝗱 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: AWS, Azure, Google Cloud 🚀𝗩𝗲𝗿𝘀𝗶𝗼𝗻 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: Git, GitHub, GitLab 𝗟𝗲𝘁’𝘀 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗲: If you’re looking for someone who’s not just a coder but a person who can bring joy and fun to the game, I’d love to chat. Whether it’s building something new or optimizing your current system, let’s work together to make it happen!