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DevKrk Jarosław Matejek

Professional Profile

Software Engineer / Technical Lead

Professional background, experience and technical strengths behind my work in full-stack engineering, technical leadership and reliable software delivery.

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Professional summary

Full Stack Engineer with 9+ years of experience designing and developing scalable web applications, e‑commerce systems and custom software solutions. Experienced in JavaScript, TypeScript, React, Next.js, Node.js, PHP, GraphQL, SQL and cloud-based environments.

I combine hands-on development with architecture decisions, technical planning, client communication, team coordination and long-term maintenance. My focus is pragmatic engineering, maintainable systems, business-oriented delivery and responsible technical ownership.

What I bring to teams

  • Full-stack implementation across frontend and backend
  • Technical leadership and delivery ownership
  • Architecture and technology decisions
  • Direct client and stakeholder communication
  • E‑commerce and custom software experience
  • Refactoring and performance optimization
  • AI-assisted engineering workflow
  • Security-conscious engineering mindset
  • Ability to work in Polish and English

Experience

May 2020 — present Kraków, Poland

Technical Lead & Software Engineer / DevsElite Group

I take ownership of software delivery across engineering, technical direction and client collaboration. I support web, e‑commerce and custom software projects for agencies, SMEs and direct business clients.

  • Leading technical decisions and implementation direction
  • Delivering frontend and backend features
  • Supporting the full project lifecycle from planning to deployment
  • Coordinating cross-functional teams and specialists
  • Improving performance, maintainability and technical structure
  • Supporting hosting, deployment and long-term maintenance
Jan 2018 — present Kraków, Poland

Freelance Full Stack Developer / DevsElite

I developed and maintained web applications, websites, e‑commerce platforms and custom software solutions for a wide range of clients and project scopes.

  • Building and improving web applications and online stores
  • Working with WordPress, WooCommerce, PrestaShop and custom solutions
  • Implementing frontend and backend features
  • Refactoring and optimizing existing codebases
  • Supporting deployments, maintenance and technical updates
  • Working with agencies and direct business clients
Sep 2016 — Jan 2017 Kraków, Poland

Junior Java Developer Intern / ESC S.A.

Early commercial software development experience focused on programming, documentation and software engineering fundamentals.

Apr 2016 — Aug 2017 Kraków, Poland

Junior Java Developer Intern / Petrosoft.pl

Internship experience focused on programming, technical problem solving and software development basics.

Technical stack

Frontend

  • JavaScript
  • TypeScript
  • React
  • Next.js
  • HTML
  • CSS, SCSS

Backend

  • Node.js
  • Express.js
  • PHP
  • SQL
  • GraphQL
  • REST API

CMS & E-commerce

  • WordPress
  • WooCommerce
  • PrestaShop
  • Custom integrations

Quality & Delivery

  • AWS
  • Git
  • Jest
  • Cypress
  • Scrum, Kanban

AI & Security

  • ChatGPT, Claude, Gemini
  • AI-assisted engineering workflow
  • Code analysis
  • Documentation support
  • Refactoring support
  • Security-conscious mindset

Education

2025 — 2026

Postgraduate Studies — Machine Learning in Data Analytics

AGH University of Krakow

2020 — 2022

M.Eng. Computer Science in Engineering

AGH University of Krakow

2020 — 2021

Postgraduate Studies — IT Technologies and Business Processes

AGH University of Krakow

2015 — 2020

B.Eng. Electronics and Telecommunications

AGH University of Krakow

Certifications

Scrum.org

  • Professional Scrum Master I
  • Professional Scrum Product Owner I
  • Professional Scrum Developer I

AI / Machine Learning / Business

  • AIDEAS — Advanced AI Competency Development
  • AIDEAS — Artificial Intelligence & Machine Learning Programme
  • Google — AI in Business Development

Cybersecurity

  • Sekurak Academy 2023
  • Sekurak Academy 2024
  • Cisco Sec University

Other

  • Data Protection Officer — ZEM Kraków
  • AutoCAD Intermediate — Autodesk
Credly badges GitHub Download CV

Memberships

ISSA Poland

Information Systems Security Association

Polish Information Processing Society

Polskie Towarzystwo Informatyczne

Need senior engineering support for your project or team?

Whether you need development, modernization, technical consulting or senior engineering support, I can help you move forward with clarity and ownership.

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