Description

I help scale-ups and enterprises build robust, high-performance web applications. With 14+ years in Full Stack Development, I specialize in migrating legacy systems to modern Next.js/NestJS architectures and optimizing Core Web Vitals (>90).

Key expertise:

Performance & Scalability: Reduced infrastructure costs by 40% using AWS Lambda & Serverless.

Conversion Optimization: Implemented headless CMS (Contentful/DatoCMS) resulting in 35% better SEO performance.

Technical Leadership: Architecting clean, maintainable codebases using Clean Architecture & Design Patterns.

Let's discuss how I can accelerate your React or Nest.js project. Available for remote collaboration.

Industry field of expertise

Languages

Polish
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

SOFTWARE MIND S.A.,
Full Stack Developer
DIGITAL AND IT
May 2025 - September 2025 (4 months)
Krakow, Poland
JavaScript Full Stack
Responsibilities:
- developed, and maintained scalable full-stack web
applications,
- built server-side applications using Node.js and NestJS
- developed and optimized responsive, high-performance user interfaces with React,
JavaScript Typescript React.js Node.js NestJs
Amsterdam Standard Sp. z o.o.
Full Stack Developer
March 2016 - March 2025 (9 years)
Kraków, Poland
JavaScript Full Stack (08.2019 – Present)
Responsibilities: Developed and maintained
applications.
Technologies: TypeScript, JavaScript, HTML, CSS,
Programming Languages: JavaScript,
TypeScript, PHP ( Knowledge of the language)
Frontend: HTML, CSS, React, Next.js, MUI,
Styled Components
●Backend: Nest.js, Serverless (AWS Lambda)
●Headless CMS: Contentful, Dato CMS
●Databases: SQL (MySQL, PostgreSQL), NoSQL
(DynamoDB)
React, Next.js, Nest.js, Serverless Framework, AWS
Lambda, MySQL, PostgreSQL, DynamoDB, MUI, Styled
Components, Dato CMS, Contentful CMS.
PHP Full Stack (03.2016 – 07.2019)
EDUCATION
applications.Cracow University of Technology,
Kraków – Master's Degree
Technologies: TypeScript, JavaScript, HTML, CSS,02.2015 – 02.2019
Angular, React, PHP (Zend, Symfony), PostgreSQL,Field of Study: Computer Science.
MySQL
F1 Outsourcing Development Sp. z o.o.
Full Stack Developer
March 2014 - February 2016 (1 year and 11 months)
Kraków, Poland
Responsibilities: Development and maintenance of applications. Technologies: JavaScript, HTML, CSS, jQuery, PHP, Phalcon, PostgreSQL/MySQL.

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Master's Degree
Cracow University Of Technology
2019
Master's Degree
Bachelor of Engineering
Higher Vocational School in Tarnow
2011
Bachelor of Engineering

Piotr K.

Senior Full Stack Engineer | SaaS & React/Node

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