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Avatar of Piotr Kowalski.
Piotr Kowalski
Senior Web Developer | React, Node.js, Django | 6+ Years in Scalable Full-Stack Development
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Piotr Kowalski

Senior Web Developer | React, Node.js, Django | 6+ Years in Scalable Full-Stack Development
I'm a Senior Web Developer with over 6 years of experience building scalable full-stack applications using React, Node.js, and Django. I’ve led performance optimization initiatives (35% LCP improvement), cost-saving efforts (30% AWS savings), and successful legacy migrations to microservices. I thrive in agile environments, mentor junior developers, and specialize in building clean, maintainable code for high-performance systems.
Logo of the organization.
Netguru
University of Information Technology and Management in Rzeszow
Powiat wrocławski, Lower Silesia, Poland
Polandia

CV Pilihan

Piotr_Kowalski.pdf

Diunggah pada 16 Jul 2025

Latar Belakang Profesional

  • Status sekarang
    Sudah bekerja
  • Profesi
    Full Stack Development
    ・
    Back-end Engineer
    ・
    Data Engineer
  • Bidang
    Software
    ・
    Ecommerce
    ・
    Blockchain
  • Pengalaman Kerja
    6-10 tahun (relevan 6-10 tahun)
  • Management
    Saya berpengalaman mengelola 5-10 orang
  • Skil
    React
    Next.js
    Vue.js
    Node.js
    Django
    python
    AWS
    Docker
    Kubernetes
    performance optimization
    Accessibility
  • Bahasa
    English
    ・
    Profesional
    Polish
    ・
    Bahasa ibu atau Bilingual
  • Pendidikan tertinggi
    Sarjana

Preferensi pencarian kerja

  • Status sekarang
  • Jenis pekerjaan yang diinginkan
    Full-time
    ・
    Tertarik bekerja jarak jauh
  • Jabatan pekerjaan yang diinginkan
    Senior Full Stack Developer
  • Lokasi pekerjaan yang diinginkan
    Powiat wrocławski, Lower Silesia, Poland
  • Bekerja lepas
    Non-pekerja lepas

Pengalaman Kerja

Logo of the organization.

Senior Full-Stack Developer

Netguru
・
Full-time
03/2021 - Sekarang
Powiat wrocławski, Lower Silesia, Poland
-Led React performance optimization project, reducing LCP by 35% through code-splitting and memorization -Designed Node.js micro-service handling 500+ requests per minute (RPM) for payment processing, achieving 99.99% uptime. -Established accessibility audit process that brought client's platform to WCAG 2.1 AA compliance

Full-Stack Developer

NEXT STX GYMNASIUM
・
Full-time
07/2019 - 02/2021
・
1 yr 8 mos
Powiat poznański, Greater Poland, Poland
-Reduced Django admin panel load times by 72% through query optimization and caching -Migrated monolithic legacy system to containerized microservices (Docker + Kubernetes) -Implemented Python type hints across code-base, decreasing runtime errors by 40% -Worked in a cross-functional team delivering fin-tech and SaaS solutions

Frontend Tech Lead

The Softwarehouse
・
Full-time
01/2018 - 06/2019
・
1 yr 6 mos
-Architect Next.js e-commerce platform processing €1M+ monthly transactions -Improved mobile Lighthouse scores from 58 to 89 through image optimization and SSR tuning -Mentored 4 junior developers, with all promoted within 12 months -Oversaw front-end road-map and coordinated releases across teams

Junior Web Developer

10Clouds
・
Full-time
06/2016 - 12/2017
・
1 yr 7 mos
Powiat warszawski zachodni, Mazovia, Poland
-Developed Vue.js dashboard with real-time data visualization for IoT startup -Automated testing pipeline reducing regression bugs by 65% -Optimized Docker deployments, cutting AWS costs by $8k/year

Edukasi

University of Information Technology and Management in Rzeszow

Sarjana Teknik
・
Computer Science
2014 - 2018
Aktivitas dan komunitas
-Led a 5-person team to build a library management system (adopted by the university) -Completed AWS Academy program (cloud deployment)
Deskripsi
-Specialized in web development, distributed systems, and modern database architectures. -Thesis: "Efficiency Analysis of NoSQL vs SQL Databases for High-Traffic Web Applications" (graded 4.8/5.0). -Key project: Led team to develop a Java Spring + React library management system, later adopted by the university.