Oleksandr S.

I created a social network for pet lovers, similar to Instagram. Users can register, verify emails, manage profiles, and post pet videos. Features include tagging users, subscribing to updates, viewing feed posts, commenting, and chat messaging with read status, image sharing, and notifications for comments, messages, and followers. I worked as a full stack developer and front end developer on this project. My role involved react front end developer responsibilities and API logic as a python rest api developer. This end-to-end app development involved OpenAI integration for AI chats with psychologists. As a react.js developer and python developer, I used python django to build APIs and django react stack for the platform. I implemented rich UI with react.js, prepared the codebase for next.js features, and explored future angular modules. CMS integration is possible, although the current setup runs without a cms backend.

I built a sport associations platform enabling parent organisations to invite child and grandchild entities. Organisation managers can invite members by email, assign roles, and manage permissions. A smart inheritance system handles access levels across the hierarchy. Institutions can submit structured data through customizable data points—types include checkbox, choice, venue, stakeholder. As a wed developer, I handled this end-to-end as a full stack engineer. I focused on react js frontend development while applying my skills as a python django developer. The project reflects solid react web development techniques and my dual role as a react developer accompanied with django developer duties. I used javascript to craft dynamic UI, built in react, and designed APIs in python and it's framework django. The system is extensible and integrates well with react django stacks. I considered Vue with Nuxt, but React was chosen in result.

I worked on Machine Learning startup MVP as a wed developer, contributing across the app in a full stack role. I implemented a JWT token authentication with OAuth 2 with Google, Facebook, and Zoom providers. Also coded chunked file uploads to AWS S3 and developed scalable APIs using python and django. The stack also included Django REST framework, Celery, PostgreSQL, Docker, and AWS - the standard django developer stack. On the frontend, I took the lead in react web development, building and maintaining the react js frontend with modern UI practices. I used react and javascript to create responsive components and optimize user interactions. My role as the primary react developer also involved API integration and performance tuning. The project architecture followed a react django pattern, giving me full visibility into how both layers interacted. Additionally, I explored vue and nuxt to evaluate future UI possibilities.

I developed a Zoom extension where users mark key video moments and leave quick comments like “analyze better later.” After calls, they can log in, export those video parts, and merge them into one clip—perfect for team presentations. I worked as a front end web developer, managing user flows and also worked as a ui ux designer. My role included react frontend developer responsibilities and full-stack ownership as a full stack react and django backend developer. This was a standard django web development setup with polished UI by a reactjs developer. Components were built using react js and prepared for SSR via nextjs. Deployment used django aws, containerized with django docker. I also created a high-converting landing page to onboard new users.

I worked on an ELM platform for students and tutors to meet each other as a full stack django developer and utilized JavaScript developer skills for a front end. I did a course search / filtering by subject, language, price, and rating using a web developer django-filters library. Tutors were able to create a course description page, enroll and decline student enrollment requests, and track student progress. I coded authentication and authorization, so the serverless platform supported multiple user types, and permissions. Front end part was covered by React JS Development. Course recommendation system was done with a machine learning python algorithm running on FastAPI and connected to the Amazon Neptune database. The client also considered full stack developer Laravel versus full stack Wordpress developer but chose Django after a call with a Wordpress developer, because it is more flexible than Wordpress. I also implemented a mobile version of the app as a react native developer.

Created a portal for governmental medical organizations as a full stack developer. Led a team of three engineers. Designed backend microservices using Django, Flask, PostgreSQL, and SQLAlchemy. Implemented OpenID Connect and ensured secure, scalable APIs as a python developer. Followed best app development practices with GitLab CI, Docker, nginx, and SSL. Contributed as a react.js developer during early UI planning, with services aligned to python django standards. Built responsive UIs as a front end developer. I developed modular components in react.js as a react front end developer. We followed a django react model for clean integration. I made secure endpoints as a python rest api developer. Also explored next.js and angular for scalable UI enhancements.

Created a billing software for telecommunications company. Worked in a team of 11 persons. Created and optimized queries to ElasticSearch, primary data analysis with Kibana. Searched and retrieved data from AWS S3. Wrote and refactored OOP code for all steps of ETL-process. Setup and adjusted virtual environment services with Docker, Vagrant. Worked with threading/multiprocessing issues, improved system scalability.

Worked on projects to develop European internet-shops. The systems processed over 350 orders daily. Created database schema design, developed buy/sell functionality, integrated the system with Facebook API, and performed server configuration. Team size was five people. Tools and technologies included Python, Django, PostgreSQL, Celery, Redis, JavaScript, AJAX, HTML, CSS, Git, Trello, nginx, Gunicorn, and supervisor.