Oleh S.

I am a highly motivated and enthusiastic Backend Developer with 8 years of experience building web applications using Python and related technologies. I am well prepared to work with Machine Learning (ML) and Artificial Intelligence (AI), so now looking for an opportunity to apply my knowledge to deliver exciting new projects in this area! I'm passionate about programming and have consistently delivered high-quality, scalable, and robust solutions that meet my client's needs. I have experience working in international markets. One of my strengths is the ability to create the final product while working in an international team united by a common goal. TECH STACK ✅ PROGRAMMING LANGUAGES: Python, Javascript ✅ FRAMEWORKS/LIBRARIES: Django, Flask, FastAPI, Aiohttp ✅ DATABASES: MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch ✅ AI/ML STACK: Streamlit, Gradio, Python notebooks, LlamaIndex, Langgraph, Langchain, RAG, Embeddings, LLM, FineTuning, NPL, vector database, graph database, Knowledge Graph, OpenAI, Gemini, Groq (LLama2, LLama3, Gemma, LLava, etc), Ollama ✅ OTHER: Celery, AWS, Digital Ocean, Sockets PORTFOLIO ✅ Onboard charging system. I discussed the requirements with the client, developed several modules, and tested the codebase. ✅ Web application with an emulator of charging stations and central. I designed models for databases, created endpoints, and implemented OCPP 1.6 functionalities. ✅ Development of an app for tracking races and for racing statistics. I developed API service using the Django REST framework, designed database models, covered code with unit tests, integrated with the Stripe payment system, and mentored junior developers on best practices and programming techniques. ✅ Car auction platform which allows users to buy cars. I performed code review and code refactoring, created internal tools for parsing data, covered code with unit tests, and implemented new features ✅ CRM system for casino based on popular casino engine. In this project, I developed a serverless API service using AWS Lambda, AWS API gateway, and serverless framework for Node.js, delivered code review and code refactoring, and designed models using serverless CMS Webiny and GraphQL. ✅ Development of an app for tracking students and study unit (Universities, Colleges, schools) processes. I worked on a team to develop a web-based application using Python and Django, participated in code reviews, bug fixing, and testing activities, and assisted in the application deployment on the production server. ✅ A system for boat or yacht reservations. I developed and maintained a Python-based application, designed database models, integrated with the Stripe payment system, implemented sockets chat using Django channels, and developed and maintained the front-end part using jQuery, HTML5, and CSS3. LANGUAGES I SPEAK Ukrainian is my native language. Besides, I have strong English skills. Most of my previous customers were English-speaking, so I am comfortable communicating in English. MY TEAM I am at ease as an individual contributor, but being a team player works best for me. So I joined Extrawest — an Upwork Top Rated Agency specializing in FinTech and Banking, Gambling and Betting, Food Ordering and Delivery, Logistics and Fleet Management, Medical Insurance and Healthcare, and special software for Electric Vehicles Charging Station networks since 2006. Having most of our resources based in Europe, we’ve been working with customers from over 20 countries (the US, Canada, Australia, most of the EU, South Africa, Singapore, Japan). Hence, it won’t be a problem for us to adjust to your timezone and working schedule. INVITE ME FOR AN INTERVIEW If you feel I’m a good fit for your project, let's discuss how I can help streamline your business’s growth! 🟩 🟩 🟩 🟩 My Agency Skills: Front-End (Frontend) Development, Back-End (Backend) Development, Full-Stack (Fullstack) Development, Mobile Development, Artificial Intelligence (AI), Machine Learning (ML), EV Charging, eMobility, OCPI, OCPP, Automotive, Logistics, Delivery, Food Ordering, FinTech, Healthcare, Insurance, Betting, Gambling, Flutter, Dart, JavaScript (JS), TypeScript (TS), Angular, Vue.js (VueJS, Vue), React.js (ReactJS, React), Node.js (NodeJS, Node), Java, Spring, SpringBoot, Hibernate, Python, Django, Scrapy, Quality Assurance (QA), Manual Testing, Automated Testing, UI/UX Design, Figma, Adobe Creative Cloud, DevOps, MySQL, PostgreSQL, MongoDB, Firebase, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Project Management (PM).