ULADZISLAU SIRY — Full-stack developer

Expertise in Full Stack Web (3.0 yr.), Front-End Web (3.0 yr.).

Last verified on October, 2025

Core Skills

NestJS

Bio 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.

Technical Skills

Programming Languages	Java, JavaScript, Python
Python Libraries and Tools	Aiogram
JavaScript Frameworks	Angular, NestJS, Node.js, React
Python Frameworks	Flask
AI & Machine Learning	LLM, OpenAI
JavaScript Libraries and Tools	React Router, RequireJS
Databases & Management Systems / ORM	MySQL, PostgreSQL, Sequelize
UI Frameworks, Libraries, and Browsers	CSS, HTML, Tailwind CSS

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

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