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Dear Sir or Madam, My name is Oleksandr Prognimak. I have been working as a software developer for 33 years. I have extensive and longstanding experience in the following programming languages, frameworks, libraries, and technologies. Currently, my main focus is on the following IT areas: Java, JEE, Spring, Spring Boot, Angular, HTML5, JavaScript, TypeScript, CSS, SQL, PL/SQL, Docker, JUnit, Mockito, WireMock, Pact io, Maven, Oracle, PostgreSQL, and Azure Cloud. Here is the complete list of my skills: Skills, consulting, and development as a freelancer in the following areas: - Java: JDK 1.1 - 21, JSE, Swing, AWT - JEE: J2EE, JEE5,6,7,8,10 (Servlet, CDI, EJB, JPA, JMX, JMS, JSF) - Spring/Spring Boot: Spring Core, Spring Boot, Spring Test, Spring Data, Spring Integration, Spring Batch, Microservices - Cloud: Azure, AWS - Web Development/UI: Angular 4,7,10,16; Vue.js 2,3; TypeScript, GWT, Vaadin, JSP, JSF (RichFaces, PrimeFaces), HTML4, HTML5, JavaScript, JQuery, AJAX, Struts, Spring MVC - Web Services: SOAP, SOA, RESTful, Rest-API, OpenAPI, Swagger, RestEasy, Jersey, JSE HttpClient - ORM: Hibernate, EclipseLink, Apache OpenJPA - RDBMS/SQL: Oracle, Postgres, MySQL, MS-SQL, SQL, PL/SQL, MS Access, Teradata, H2 - App. Server/Servlet Container: Apache HTTP, Apache Tomcat, JBoss, Wildfly, Websphere, OC4J - XML Processing: AXIS-2, XPath, XSLT, XML Schemas, JAXP, JAXB - Build Tools: ANT, Maven, Gradle, Mojo - Source Code Management: GIT, GitLab, GitHub, Bitbucket, SVN, CVS - Case Tools/UML: Magic Draw, Software Architect, Together, ERWin, RationalRose - Report Tools: Jasper Report, BIRT Reports, Oracle Forms and Reports, Eclipse BI-Reports - Security: Java Security, JSSE, PKI, Websecurity, X509 - Test Tools/Testing: JUnit, TestNG, Cucumber, JBehave, Mockito, WireMock, EasyMock, Spring Test, Pact io, LoadTest, IntegrationTest, CI - MS-Office: VB, VBA, Excel-VBA, Access-VBA - Container Virtualization: Docker, Docker-Compose, Swarm, Kubernetes (K8) - Big Data: Apache Kafka, Zookeeper - Very Old Skills: C, C++, Basic, Pascal I am available immediately. Best regards, Oleksandr Prognimak

⚡️ Do you have a new product to build, and are you looking for an expert backend developer you can trust to design and build the server side of your product? Look no further! I have more than 10 years of experience in web development with various programming languages (mostly PHP and Golang) in very different companies (from big tech to small non-profit projects). Now I specialize in building startups: ✅ I design, implement and deploy features as fast as possible ✅ I always add valuable metrics ✅ I write clean code that can easily grow and evolve for your product's needs. ✅ I can suggest existing services, open-source tools/libraries, or no-code/low-code solutions reducing development. I'm a full-time Upwork freelancer, and this is not just a side hustle for me. I can offer you a professional project delivery with high-quality code and clean architecture. I will take the time to understand your needs and ensure that the product works according to your vision. ⏩ If you're looking for a professional and experienced backend developer who will deliver the results you want, contact me right now to make progress together!

▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ █ FULLSTACK DEVELOPER █ █ 3+ YEARS EXPERIENCE █ ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ I am a versatile freelancer with three years of experience spanning the digital landscape from web development to AI integration. My portfolio includes collaborations with global enterprises like Walmart and Mondelez, as well as innovative startups like Nagel und Kopf, serving clients across Switzerland, Germany, the United Kingdom, and Silicon Valley. ░░░░░░░░░░░░░░░░░░░░░ ▌▌▌▌▌ CORE SERVICES ▌▌▌▌▌ ░░░░░░░░░░░░░░░░░░░░░ ►►►► AI & MACHINE LEARNING ◄◄◄◄ def ai_capabilities(): return { "machine_learning": ["autoencoders", "LLM_fine_tuning", "computer_vision"], "advanced_ai": ["RAG_implementation", "neural_networks"], "frameworks": ["TensorFlow", "PyTorch", "Hugging_Face"] } • Proficient in machine learning techniques, including autoencoders, LLM fine-tuning, and computer vision • Experience implementing Retrieval Augmented Generation (RAG) for advanced AI applications ►►►► AUTOMATION & INTEGRATION ◄◄◄◄ const automation = { apis: ["Python", "REST", "GraphQL"], platforms: ["Zapier", "Make.com", "N8N"], deployment: ["Docker", "AWS", "Serverless"] }; • Development of custom API integrations using Python • Automation solutions through platforms such as Zapier, Make.com, and N8N ►►►► FULLSTACK DEVELOPMENT ◄◄◄◄ ▓▓▓ FRONTEND ▓▓▓ ◄═► ▓▓▓ BACKEND ▓▓▓ ◄═► ▓▓▓ DATABASE ▓▓▓ React • Next.js • Vue.js • TypeScript ═► Node.js • Python • APIs • Hooks ═► PostgreSQL • MongoDB • Supabase • Firebase Expertise in modern front-end frameworks and libraries including React, Next.js, Vue.js, TypeScript, and JavaScript Database management and integration using PostgreSQL and SQL-based systems (Supabase, Firebase, or MongoDB) Creation of custom APIs, hooks, and complete CMS or CDN solutions ►►►► WEB DEVELOPMENT ◄◄◄◄ ╔═CMS═SOLUTIONS═══════════════╗ ║ ✓ Webflow + Next.js Integration ░░░░░░░░║ ║ ✓ Framer + React/Vue.js ░░░░░░░░░░░░ ║ ║ ✓ Custom CDN Creation & Deployment ░░░ ║ ║ ✓ Animation: Lottie Files + After FX ░░░░░░║ ║ ✓ Multilingual: Weglot│Hardcode│i18n░░░░║ ║ ✓ Auth: Memberstack│Supabase Magic ░░░║ ╚════════════════════════════╝ Development using CMS systems such as Webflow or Framer, with seamless integration of frameworks like Next.js, React, Vue.js, and Node.js Clean, standards-based HTML, CSS, and JavaScript development for robust web solutions Custom CDN creation and deployment Animation expertise using Lottie files or Adobe After Effects Multilingual website creation through methods including Weglot, hardcoding, React libraries, or native CMS locale functions Dashboard design and implementation of secure authentication systems ►►►► DESIGN & BRAND IDENTITY ◄◄◄◄ UX Research ═► Wireframing ═► Prototyping ═► Development ░░░░║ ░░░░░░░░░║░░░░░░░░║░░░░░░░░░║ ░░░░▼░░░░░░░░░▼░░░░░░░░▼░░░░░░░░░▼ User Testing Lo-Fi Design Hi-Fi Design Implementation Strategic design solutions that ensure visual consistency and a strong brand identity Extensive experience in UI/UX design, responsive design, prototyping, and high-fidelity wireframing ►►►► DATA SCRAPING & ANALYSIS ◄◄◄◄ class DataPipeline: def init(self): self.tools = ["Python", "Beautiful_Soup", "Scrapy"] self.output = ["Market_Research", "Competitor_Analysis"] def extract_transform_load(self, raw_data): return self.transform_to_insights(raw_data) Skilled in web scraping, data extraction, and cleansing using tools such as Python, Beautiful Soup, and Scrapy Ability to transform raw data into actionable insights for market research, competitor analysis, and trend tracking ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ █▌▐█ ABOUT THE DEVELOPER █▌▐█ ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ ▲ Age: 24 years old ▲ Education: Bachelor's in International Information Systems ▲ University: Applied Sciences Augsburg ▲ Specialization: Software Development • Engineering • Project Management On a personal note, I am 24 years old and will soon complete my Bachelor's degree in International Information Systems at the University of Applied Sciences Augsburg. My academic background in software development, engineering, and project management reinforces my commitment to delivering innovative, reliable solutions tailored to your business needs. ♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦ █ READY TO COLLABORATE? █ ♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦♦ Let's collaborate to develop digital solutions that drive your business forward.

I'm a goal oriented physicist with 15+ years experience in project work including: Physics calculations from elementary mechanics to non-commutative quantum field theories Physics and detector simulations, using in particular Monte Carlo methods programmed in C++ Quantitative analysis (also outside of physics) using the python pandas data analysis library, advanced statistical methods - general regressions and error analysis with C++ libraries or R. Data and theory visualization is one of my principal concerns as it helps very much in understanding the relationships. Experience in Optimization - linear programing, integer programming, constraint programming Programming skills in the languages fortran, C, C++, java, javascript, matlab, python, R, prolog and others. Extensive symbolic calculations with the python based system SymPy, or using faster specialized systems programmed from scratch. Pure mathematics - calculus, geometry, discrete mathematics, combinatorics, mathematical logic, graph theory Numerical calculations using fortran, C or python Good communication skills in English, French and German I'm aiming at a responsible use of science.

REMOTE WORK ONLY! I have more than 25 years of experience in Software Engineering in several Industries, mainly in Europe (Germany) I had made Design, Develop, Testing, Agile Project Coordination and DevOps for several platforms: .- Windows .- Linux (Desktop & Embedded) .- QNX .- Android Deep Knowledge and experience with several Programming Languages: .- C and Embedded C .- C++ .- C# .- Java .- Shell scripting .- Python I have very good communication Skills, I can also do training and Technical Presentations. I had worked in Multidisiplinary and Multicultural environments.

🌟 𝗘𝗫𝗣𝗘𝗥𝗧 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 & 𝗔𝗜 𝗘𝗡𝗚𝗜𝗡𝗘𝗘𝗥 🌟 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 | 𝗔𝗜 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 | 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 | 𝗪𝗲𝗯 & 𝗔𝗣𝗜 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 I am a Full Stack and AI Engineer with 12+ years of experience. 18,800+ delivered hours 69+ completed projects 5.0 star client record 100% Job Success Score. I have delivered $670K+ in full stack projects covering SaaS platforms, ecommerce systems, automation workflows, AI products, admin dashboards, APIs, CRM systems, and production web applications. My core expertise spans AI Agent Development, AI App Development, and end-to-end AI Development combined with Full Stack Development, Full Stack Development, and scalable Backend Development. I build real-world Artificial Intelligence systems including AI bot, AI Chatbot, and Chatbot Development solutions using Machine Learning, Deep Learning, and Natural Language Processing. My work focuses on AI Integration, API Integration, and business-ready automation that drives Lead Generation and Sales. For MVPs and SaaS builds, I aim to ship usable production ready versions in days and weeks, not months. With the right scope, I can help ship a working SaaS V1 in 14 days instead of a long 6 week cycle. 🧠 𝗔𝗜 𝗔𝗚𝗘𝗡𝗧𝗦, 𝗔𝗜 𝗖𝗛𝗔𝗧𝗕𝗢𝗧𝗦 & 𝗔𝗜 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 AI Agent Development is a major pillar of my work. I design autonomous AI Agent Development systems, AI bot workflows, and AI Chatbot platforms powered by Artificial Intelligence, Machine Learning, Deep Learning, and Natural Language Processing. My AI Development stack heavily uses LangChain, OpenAI API, and advanced LLM Prompt Engineering to deliver reliable AI Chatbot and Chatbot Development systems. These AI App Development solutions support Lead Generation, Sales automation, and Marketing Automation. 🔗 𝗔𝗜 𝗜𝗡𝗧𝗘𝗚𝗥𝗔𝗧𝗜𝗢𝗡, 𝗔𝗣𝗜 & 𝗔𝗨𝗧𝗢𝗠𝗔𝗧𝗜𝗢𝗡 I specialize in AI Integration and API Integration across modern platforms. I design secure API, API Development, and API Integration layers that connect AI systems to real business workflows. I build automation using n8n, Zapier, and Scripting & Automation to orchestrate AI Agent Development, AI Chatbot flows, Marketing Automation, Lead Generation, and Sales pipelines. API and API Integration are core to every system I deliver. 💻 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞, 𝗙𝗥𝗢𝗡𝗧𝗘𝗡𝗗 & 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 I deliver Full Stack Development and Full Stack Development using Python, JavaScript, TypeScript, Node.js, React, Next.js, FastAPI, and HTML5. My Backend Development and Backend Development work focuses on scalability, performance. On the FRONTEND and Frontend Development side, I work with Vue.js, Angular, React, Next.js, Nuxt.js, JavaScript, TypeScript, HTML, HTML5, CSS, Bootstrap, jQuery, and Tailwind to deliver modern Web Design and responsive Web Application experiences. ⚙️ 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 𝗙𝗥𝗔𝗠𝗘𝗪𝗢𝗥𝗞𝗦 & 𝗗𝗔𝗧𝗔𝗕𝗔𝗦𝗘𝗦 My backend expertise includes Laravel, Symfony, CodeIgniter, Ruby on Rails, Nest.js, Express.js, PHP, Ruby, Node.js, and FastAPI for Web Development and Mobile App Development. I design data-driven systems using MySQL, MySQL Programming, PostgreSQL, and MongoDB, ensuring reliability for Web Application, Ecommerce Website Development, and AI App Development platforms. 📱 𝗪𝗘𝗕, 𝗠𝗢𝗕𝗜𝗟𝗘 & 𝗘𝗖𝗢𝗠𝗠𝗘𝗥𝗖𝗘 I build scalable Web Development and Web Application solutions, backend-driven Mobile App Development systems, and high-performance Ecommerce Website Development platforms with secure API Integration. 🚀 𝗗𝗘𝗩𝗢𝗣𝗦 & 𝗗𝗘𝗣𝗟𝗢𝗬𝗠𝗘𝗡𝗧 I apply DevOps and DevOps Engineering best practices using Git, Docker, Heroku, and Amazon Web Services to ensure reliable CI/CD, scalable infrastructure, and production stability. I also deliver WordPress solutions, including custom development, API Integration, and headless Web Development architectures. 🌟 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘 I have following skills: ✅ Proven expertise in AI Agent Development, AI App Development, and AI Development ✅ Strong background in Artificial Intelligence, Machine Learning, Deep Learning, and NLP ✅ End-to-end Full Stack Development and Full Stack Development ownership ✅ Advanced API Development, API Integration, and automation ✅ Reliable DevOps Engineering and cloud deployments ✅ Business-focused systems for Lead Generation, Sales, and Marketing Automation 𝗚𝘂𝗶𝗱𝗮𝗻𝗰𝗲 𝗜 𝗽𝗿𝗼𝘃𝗶𝗱𝗲: Whether you are planning a new Web Application, exploring AI Integration, or need advice on Full Stack Development strategy, I help you make the right technology decisions with confidence. WHAT CLIENTS SAY ⭐ "Excellent support and knowledge to achieve all the work." ⭐ "Quality and service is top level. 👌 He by far exceeded my expectations. I would only want him for my next project." ⭐ "It was an excellent experience working with Mohsin. Highly knowledgeable in OCR and preprocessing."