01
API Development
Designing and implementing RESTful APIs and API plugins with FastAPI, Django REST Framework and Node.js — built for clarity, security and maintainability.
REST APIs · JWT Auth · Full-text Search · OpenAPI Docs
Software Engineer — Thessaloniki, GR
Pantelis Grammatikopoulos
Backend systems, APIs and microservices across education and enterprise domains — plus AI-powered automation pipelines that turn manual work into reliable, scalable workflows.
About
Engineering scalable systems behind the scenes
I'm a Software Engineer with a degree in Computer Science from Aristotle University of Thessaloniki, equipped with proven experience in backend systems development. I design and implement APIs and microservices across education and enterprise domains, and I enjoy tackling complex challenges to create efficient and scalable systems.
Most recently I have been building AI-powered automation pipelines — combining UiPath, Python and LLMs to automate invoice processing, document extraction and legacy system integrations. Driven by a passion for software engineering, I strive to deliver innovative solutions and impactful results.
Day to day I work across Backend (apis, microservices, databases), Integrations (boomi ipaas, enterprise systems), AI Automation (uipath, llms, workflows), Full Stack (angular, react, node.js).
Services
What I can build
02
Microservices & Integrations
API-driven interfaces and microservices orchestrated with Boomi iPaaS to enable seamless, plug-and-play communication between cloud and enterprise systems.
Boomi iPaaS · Event-driven · Legacy Systems · Interoperability
03
AI Automation
Intelligent automation pipelines powered by UiPath and LLMs — automating invoice processing, document extraction and report generation end to end.
UiPath Bots · LLM Extraction · Python Workflows · Web Automation
04
Full-Stack Delivery
Responsive front-end applications with Angular and React paired with backend services — from student information systems to real estate platforms.
Angular · React · Node.js · TypeScript
Career
Work experience
Sep 2025 — Present
Software Engineer at Kuehne + Nagel
Thessaloniki, GR
Building AI-powered automation pipelines and an internal platform for measuring the value and impact of automations across the organization.
UiPath · Python · LLMs · FastAPI · Docker
May 2024 — May 2025
IT Services — Mandatory Military Service at NRDC-GR
Thessaloniki, GR
Served mandatory military service in the IT unit, handling network administration, user support and a custom service for the military club.
Network Administration · IT Support · Full Stack
Dec 2024 — May 2025
Full Stack Developer — Contractor at AUTH IT Center
Thessaloniki, GR
Contract full-stack development on Student Information System (SIS) plugins and educational management interfaces for Aristotle University.
Node.js · Angular · PostgreSQL · TypeScript
Apr 2023 — May 2024
Junior Integration Developer at Deloitte
Thessaloniki, GR
Enterprise integration engineering with Boomi iPaaS — designing API-driven interfaces and microservices architectures for complex enterprise environments.
Boomi iPaaS · Microservices · API Design · REST
Selected work
Projects
Backend / Security · Thesis · Published
A specialized service to manage the registered courses of students in the UniverSIS system. Built around Merkle Tree techniques that ensure data integrity and security, exposing an API that communicates directly with the central UniverSIS API for efficient data exchange. Published as part of my BSc thesis.
Node.js · JavaScript · TypeScript · NPM Code
02 HomiDirect
Full Stack · Personal Project
A modern real estate platform connecting landlords and tenants. End-to-end application with a React front end and a FastAPI backend backed by PostgreSQL.
React · FastAPI · PostgreSQL · SQLAlchemy · Pydantic Code
Backend · Personal Project
A RESTful API for an articles management system covering articles, users, tags and comments. Includes JWT authorization, full-text search and export features.
Django · Django REST Framework · PostgreSQL Code
Data / ML · Personal Project
A data analysis notebook that explores and classifies grocery receipts, turning raw purchase data into structured insights with Python and pandas.
Python · Pandas · Jupyter · Data Analysis Code
Toolkit
Skills
- Languages
- Python, TypeScript, JavaScript, Java, SQL
- Frameworks & Libraries
- FastAPI, SQLAlchemy, Pydantic, Django / DRF, Node.js / Angular
- Automation & Integration
- UiPath, Boomi iPaaS, LLM Document Extraction, Workflow Orchestration, Legacy System Integration
- Databases
- PostgreSQL, MySQL, Data Modeling, Query Optimization, Merkle Trees
- Tools & Practices
- Git, Docker, API Design, Microservices, NPM Packaging
- Soft Skills
- Teamwork, Communication, Fast Learner, Persistence
Contact
Let’s talk.
Have a project in mind, or need a hand with backend architecture or AI automation? I’m always glad to talk through ideas.
panteleimon.grammatikopoulos@gmail.com