Michal K.

Michal K.

Fullstack developer

Poland
Trusted member since 2025
12 years of experience

He has led development teams on complex projects, including rescuing a high-pressure initiative at HyperInteractive. His work included integrating MQTT messaging, optimizing database queries, and implementing autoscaling, significantly improving system performance and enabling successful follow-up projects.

Holding a Master’s degree in Computer Science, Michal combines deep technical expertise with strong leadership skills, consistently delivering high-performance solutions. He thrives in challenging environments and drives innovation across web development projects.

Main expertise

JavaScriptJavaScript12 years
React.jsReact.js9 years
Next.jsNext.js9 years
UI12 years
13+

Experience4

Resolution

Full-Stack Software Engineer

Resolution
Information Technology (IT) and Services
Apr 2024 - Aug 2025 · 1y 4m
  • Was responsible for contributing to the development of Custom Charts, a reporting tool for Jira and Confluence, including continuous feature improvements and frontend–backend integration.
  • Ensured high code quality while expanding and maintaining product functionality.
  • Participated in code reviews and refinement meetings, and implemented, upgraded, and maintained frontend features integrated with backend services.
  • Improved product performance and user experience, contributing to increased customer satisfaction.
JavaScriptJavaScript
React.jsReact.js
MongoDBMongoDB
DockerDocker
AWSAWS
10+

Full-Stack Software Engineer

Old Street Solutions (acquired later by Tempo)
Information Technology (IT) and Services
Apr 2023 - Apr 2024 · 1y
  • Contributed to the development of Custom Charts, a reporting tool for Jira & Confluence, involving continuous feature enhancements and frontend-backend integration.
  • Ensured high code quality while extending product functionality.
  • Participated in code reviews and refinement meetings, implemented and upgraded frontend features integrated with backend services.
  • Enhanced product performance and user experience, leading to increased customer satisfaction.
JavaScriptJavaScript
React.jsReact.js
DockerDocker
AWSAWS
TypeScriptTypeScript
7+
Hyperinteractive Studio

Technical Lead

Hyperinteractive Studio
Information Technology (IT) and Services
Dec 2020 - Apr 2023 · 2y 4m
  • Successfully managed a failing project with tight deadlines and high client expectations.
  • Identified bottlenecks, refactored APIs and UI, conducted stress tests, monitored live performance, and led technical workshops.
  • Led creative projects involving blockchain, multimedia streaming, and 3D environments, managing project scoping, estimation, and technology stack selection.
  • Delivered projects successfully, resulting in additional contracts and positive client feedback.
JavaScriptJavaScript
React.jsReact.js
MongoDBMongoDB
DockerDocker
PostgreSQLPostgreSQL
14+
Massive Pixel Creation

Full-Stack Software Engineer / Team Lead

Massive Pixel Creation
Information Technology (IT) and Services
Dec 2019 - Dec 2020 · 1y
  • Delivered projects for diverse clients at a software house, ranging from custom integrations and modifications of existing software to managing the development of entire projects from scratch.
  • Worked on a variety of projects, including custom chat integration with external company software, WordPress and WooCommerce customizations, and finalizing critical features on a coaching platform prior to its official release.
  • Managed the full project lifecycle, from requirements gathering to CI/CD setup.
  • Recruited and mentored developers, and developed a skills roadmap for the team.
PHPPHP
JavaScriptJavaScript
React.jsReact.js
MongoDBMongoDB
DockerDocker
16+

Assessments

Engineering excellence

Michal’s overall performance in a 90-minute live technical assessment ranks in the top 5% of vetted Fullstack developers at Proxify.

Education

CUO
Czestochowa University of Technology
Computer Science2012 - 2013
CUO
Czestochowa University of Technology
Computer Science2008 - 2012

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