+48 666 897 499

Full-stack developer

Bartosz Sergot

mrkevler

Web development.
AI. Cybersecurity.

Full-stack development

Development · AI · Cybersecurity

Bartosz Sergot

I am a Full-stack and Python Developer working in cybersecurity with over 10 years of experience in developing scalable and secure web solutions.

Phone
+48 666 897 499
Email
Location
Bydgoszcz, Poland

What I do

Skills

What I build every day. Click a topic to see the details.

AI & LLM Apps

I build AI assistants, chatbots and agents based on large language models (LLMs). They can search your documents, answer questions and do real tasks. Tech: RAG, vector databases, prompt engineering.

Local AI Models

I install and run open-source AI models on your own servers, so your data stays inside the company. Private chatbots and assistants, lower costs and full control.

Automation

I automate boring, repeating work: emails, documents, reports, data entry and lead handling. Scripts and AI do the routine, your team makes the decisions.

APIs & Integrations

If it has an API, I can connect it. I link CRMs, online shops, payments, mailing tools and AI services, so data moves between them automatically. REST, GraphQL, webhooks.

CRM Systems

I set up, customize and build CRM systems: sales pipelines, contacts and leads, data import, automatic follow-ups and clear dashboards for the team. Also with AI features inside.

Web Development

Websites, web apps and online shops, from the database to the user interface. Python (Django, Flask), PHP, JavaScript, WordPress, WooCommerce, MySQL, PostgreSQL.

Mobile Apps

Apps for iOS and Android built with Flutter and Swift, connected to your systems and APIs.

SEO & AI Search

Fast well-built websites that rank in Google and appear in answers from AI assistants (GEO, AEO). Page speed, structured data, technical SEO audits.

Security

I worked in cybersecurity, so security is part of every project: safe logins and user access, data protection, security audits and penetration tests. I also protect AI tools against misuse.

Cloud & Servers

Servers and cloud set up the right way: AWS, Azure, Google Cloud, Render, Netlify, Linux and Docker with automatic deployments and backups. Also for running your own AI models.

My background

Experience

April 2023 – Present

Python Developer

Helmich IT-Security GmbH

Marl, Germany

2014 – Present

Independent Full-stack & AI Developer

polybrand.eu · Self-employed

Bydgoszcz, Poland · Remote

May 2022 – November 2022

Graphic Designer, IT Technician, SEO Specialist

Pokale NRW

Castrop-Rauxel, Germany

January 2019 – September 2021

Web Developer

Alfa-Med

Bydgoszcz, Poland

February 2016 – March 2022

Web Developer

StudioA7

Bydgoszcz, Poland

Download Resume

Selected projects

Recent Work

More on GitHub