Experience
May 2025 — Present
- Analyzed complex SQL execution plans and resolved database bottlenecks, accelerating listing page load times by 95% for enterprise-scale customers.
- Developed a custom Model Context Protocol (MCP) server, expanding internal LLM capabilities and accelerating developer workflows across the engineering team.
July 2024 — September 2024
- Implemented recurring bank transfers service, handling ~20,000 scheduled operations every month.
- Maintained and stabilized a legacy corporate banking application, resolving bugs and ensuring high availability for enterprise clients.
- Developed and shipped front-end features using Angular, adhering to an internal design system to ensure UI consistency.
November 2023 — April 2024
- Co-developed a customer support chatbot utilizing Llama 2 and Mistral, reducing manual ticket routing and improving response times.
- Trained and evaluated classification models for categorizing user messages using Python and PyTorch.
- Fine-tuned Large Language Models using AWS SageMaker to optimize performance in a scalable cloud environment.
- Engineered a responsive desktop and mobile interface for submitting and managing customer service requests.
October 2022 — July 2023
- Engineered a custom ReactJS hook for local storage data validation and persistence, preventing data loss and improving user experience.
- Partnered directly with a US-based client to gather requirements, clarify technical constraints, and translate business needs into actionable engineering tasks.
- Refactored the project to implement accessible and semantic HTML and CSS, ensuring full compliance with WCAG 2.1 standards.
- Implemented comprehensive unit testing using the Jest framework, increasing code coverage and helping reduce customer-reported bugs by ~20%.
July 2022 — September 2022
- Contributed to the development and maintenance of a web catalog project by resolving front-end UI bugs and implementing new features.
- Ensured code clarity, consistency, and correctness by regularly performing code reviews of pull requests created by other team members.
Education
March 2024 — September 2025
Computer Science - Master of Engineering
March 2024 — September 2025
Conducted research benchmarking various Large Language Models (LLMs) to evaluate performance metrics and technical capabilities in customer service domain.
October 2020 — February 2024
Computer science - Bachelor of Engineering
October 2020 — February 2024
Engineered a full-stack knowledge-sharing social media platform as a capstone engineering thesis project.
Projects
Technologies
Frontend
ReactJS
Component-based UI Library
Frontend
NextJS
Full-stack React Framework
Language
TypeScript
Type-safe JavaScript Layer
Backend
C# & VB with .NET
Enterprise Backend & Desktop Apps
Language
Python
AI Development & Data Scripting
Database
SQL
Relational Querying & Schema Design
Database
Prisma
Next-generation TypeScript ORM
Data Science
Pandas
Data Structures & Analysis Library
AI / ML
TensorFlow
Machine Learning & Neural Networks
AI / ML
PyTorch
Deep Learning & NLP Models
Frontend
HTML
Semantic Web Document Structure
Frontend
CSS & SCSS
Responsive Styling & Preprocessing
Frontend
Tailwind CSS
Utility-first Styling Framework
DevOps
Docker
App Containerization & Deployment
DevOps
Git
Distributed Version Control System
artur.pietrzak1@outlook.com
