Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (Algorithmic Trading Systems and Trading Algorithms)
Duration: 2003 – Present
Summary: Design and development of algorithmic trading systems and trading algorithms to automate financial trading processes and improve trading efficiency.
Responsibilities:
- Design and develop algorithmic trading systems and trading algorithms.
- Analyze business requirements and design technical solutions.
- Integrate financial APIs and third-party services.
- Optimize system performance and scalability.
- Communicate with clients and stakeholders to deliver tailored solutions.
Technologies: PHP, Python, Golang, Node.js, financial APIs, PostgreSQL, MySQL, MongoDB, Redis, Docker, Docker Compose, CI/CD
Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (E-commerce Websites, Online Auctions, and Custom CMS Solutions)
Duration: 2003 – Present
Summary: Development of e-commerce websites, online auction platforms, and custom content management systems to support online business operations and sales.
Responsibilities:
- Develop e-commerce websites and online auction platforms using PHP and custom CMS solutions.
- Integrate REST APIs and third-party services for payment gateways and other functionalities.
- Design and implement backend and frontend components.
- Ensure responsive and adaptive layouts for web applications.
Technologies: PHP, WordPress, custom CMS, JavaScript, Vue.js, Nuxt.js, React, Next.js, HTML5, CSS3, PostgreSQL, MySQL, Docker
Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (Telegram Bots Development)
Duration: 2003 – Present
Summary: Development of Telegram bots for automation, communication, and integration with various services to enhance business processes.
Responsibilities:
- Develop Telegram bots using Python and PHP.
- Integrate bots with social media APIs such as Instagram, Facebook, YouTube, and LinkedIn.
- Automate business processes and data collection.
Technologies: Python, PHP, Telegram Bot API, Instagram API, Facebook API, YouTube API, LinkedIn API
Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (AI and Automation Integration into Web Applications and Business Processes)
Duration: 2003 – Present
Summary: Integration of AI and automation technologies into web platforms and business workflows to enhance efficiency and provide intelligent solutions.
Responsibilities:
- Integrate AI-powered systems and automation tools into existing web applications.
- Develop AI-powered financial portals and AI operating systems.
- Design and develop microservices and backend services supporting AI functionalities.
Technologies: Python, Node.js, Golang, AI integrations, microservices, REST APIs, Docker, PostgreSQL, MongoDB
Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (Front-End Applications Development)
Duration: 2003 – Present
Summary: Development of front-end applications using modern JavaScript frameworks to create responsive and user-friendly web interfaces.
Responsibilities:
- Develop front-end applications using Vue.js, Nuxt.js, React, and Next.js.
- Implement responsive and adaptive layouts using HTML5 and CSS3.
- Apply basic UI/UX design principles using Figma and Photoshop.
Technologies: Vue.js, Nuxt.js, React, Next.js, JavaScript, TypeScript, HTML5, CSS3, Figma, Photoshop
Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (Backend Services Development)
Duration: 2003 – Present
Summary: Development of backend services and APIs to support web platforms, microservices, and high-performance applications.
Responsibilities:
- Develop backend services using PHP, Node.js, Python, and Golang.
- Design and implement REST APIs and WebSocket-based systems.
- Integrate payment gateways and third-party services.
- Optimize database schemas and queries.
Technologies: PHP, Node.js, Python, Golang, Express.js, NestJS, REST APIs, WebSocket, PostgreSQL, MySQL, MongoDB, Redis
Solution Developer / Full-Stack Engineer - Freelance / Self-Employed (DevOps and Infrastructure Management)
Duration: 2003 – Present
Summary: Management of deployment, containerization, and server administration to ensure reliable and efficient operation of web applications.
Responsibilities:
- Configure and manage Docker and Docker Compose environments.
- Set up CI/CD pipelines using GitHub Actions and GitLab CI.
- Automate deployment to VPS environments.
- Administer Linux servers and configure web servers such as Nginx and Apache.
- Monitor system performance and error tracking using Grafana and Sentry.
Technologies: Docker, Docker Compose, CI/CD, GitHub Actions, GitLab CI, VPS, Linux, Nginx, Apache, Grafana, Sentry
Upstaffer since September, 2026
