ULADZISLAU SIRY, Full-stack developer
B2 (Upper-Intermediate) English
Middle (3-5 years)
Summary
Seasoned Full-stack Developer with a comprehensive understanding of both front-end and back-end technologies, proficient in React, Node.js, and NestJS. Brings over 3 years of commercial experience in creating web applications and automation bots, with a proven track record of optimizing performance and enhancing prompt designs for LLMs resulting in a 30% quality improvement. Demonstrated success in scalable solution development with a focus on efficiency, evident from a 40% MySQL query performance enhancement. Holds solid DevOps fundamentals with hands-on experience in Docker, Git, CI/CD, and a diverse tech stack encompassing Sequelize ORM, Python, and various LLM APIs. Proactive problem-solver and an advocate for clean code practices, geared with a strong education in technology, highlighted by a notable GPA from AEH. Eligible to work in the EU, multilingual with proficiency in English, Polish, Russian, and Belarusian, and with a future plan to potentially shift base to Düsseldorf in 2026.
Main Skills
React 3 yr.
Node.js 3 yr.
NestJS
MySQL 3 yr.
Sequelize
Programming Languages
AI & Machine Learning
Python Libraries and Tools
JavaScript Frameworks
UI Frameworks, Libraries, and Browsers
Python Frameworks
JavaScript Libraries and Tools
Databases & Management Systems / ORM
Work Experience
Fullstack Developer, Workflow Automation and LLM Integration
Duration: October 2024 - now
Summary: Developed applications for automating routine workflows using large language models.
Responsibilities: Full-stack development, optimizing workflows, automating customer responses, improving search across multilingual data, message translation, generating delivery slips.
Technologies: Node.js, React, MySQL, Docker, Git, Python, LLM APIs, aiogram
Tech Recruiter / Occasional Technical Advisor, Recruitment Process Enhancement
Duration: September 2024 - now
Summary: Assisted with the recruitment of technical roles, improving the hiring process.
Responsibilities: Refining job descriptions, participating in sourcing strategy sessions, conducting technical screenings, collaborating with recruiters and technical leads.
Technologies: React, Angular, Java, Python (Flask), PostgreSQL, MySQL
Backend Developer, Company Operations Optimization
Duration: September 2023 - October 2024
Summary: Optimized company operations through an internal platform and automated key workflows.
Responsibilities: Backend development, automated customer service and order search, message translation, improved ticket resolution, developed Telegram bot for logistics.
Technologies: Node.js, React, MySQL, Docker, Git, Python, LLM APIs, aiogram
Frontend Developer, Landing Page Projects
Summary: Created responsive landing pages for various clients.
Responsibilities: Developing layouts, animations, and interactive elements from scratch.
Technologies: HTML, CSS, JavaScript, basic React
Frontend Developer, Language Learning Platform Development
Summary: Built a Lingvist-like language learning platform.
Responsibilities: Frontend development, component building, and product design contribution.
Technologies: React, Tailwind CSS, JavaScript, HTML/CSS
Backend Developer, Discord Chatbot
Summary: Developed a Discord bot powered by large language models.
Responsibilities: Backend development and architecture for bot functionality.
Technologies: Node.js, Discord.js, LLM APIs
Frontend & Backend Developer, Freelance Projects
Duration: August 2021 – September 2023
Summary: Performed various front-end and back-end development tasks as a freelancer.
Responsibilities: Front-end and back-end development tasks.
Technologies: Various based on projects
Education
- AEH – Akademia Ekonomiczna Humanistyczna w Warszawie
- Built an internal platform to optimize company operations and automate key workflows. Integrated LLMs to enable automatic customer responses and semantic order search across multilingual data.
- 2020 – 2024