Full career log 2004–now

FullLOG

Career log

Every team since a summer job in 2004, newest first. C marks a leadership role.

Download CV (PDF) Draft Kuba

Experience · 13 roles

Apr 2024 — Present

2.6 yrs

Inflect

Senior FullStack Engineer

Developed and optimized scalable web applications powering AI-driven products, working across the full stack with React, Next.js, and a Go backend. Played a key role in integrating AI capabilities — including OpenAI, Gemini, and MastraAI — into the platform, enabling intelligent knowledge base features and agentic AI workflows.

Building production-grade web applications with React, Next.js, Tailwind, and TypeScript
Integrating AI/LLM services (OpenAI, Gemini, MastraAI) and developing agentic AI features
Implementing cross-functional Slack integration to streamline team communication
Developing embeddable scripts and widgets using Vite and Rollup

TypeScript
React
Next.js
Go
Tailwind
Vercel
GCP
CSS Modules
zod
Vite
Rollup
GitLab CI
Cloudflare
OpenAI
Gemini
MastraAI

Apr 2023 — Dec 2023

0.8 yrs

90 seconds

Senior FullStack Engineer

Worked on a microservice responsible for a core business process within a distributed architecture. Services communicated via GCP Pub/Sub, and the application was built with TypeScript using the T3 stack (Next.js, tRPC, Prisma).

Developing and maintaining microservices in a distributed, event-driven architecture
Building React interfaces with styled-components, react-query, and jotai for state management
Implementing authentication flows with Auth0 and data access via Prisma and GraphQL

TypeScript
React
Next.js (T3 stack)
Vite
styled-components
react-query
zod
GCP Pub/Sub
React Server Components
Auth0
GraphQL
Prisma

Nov 2021 — Jan 2025

3.3 yrs

stalykurs.pl

Principal Full-Stack Engineer

Long-term contract maintaining and evolving a CRM application built with React and Firebase. Responsible for the full development lifecycle — from feature implementation to deployment — using a modern TypeScript stack with Fastify on the backend.

Maintenance and feature development for a CRM application

TypeScript
React
Firebase
Fastify
styled-components
react-query
zod
CircleCI

Aug 2021 — Mar 2023

1.7 yrs

X-Team

Senior Software Engineer

As one of X-Team's Senior Software Engineers, I was part of the team assigned to work with Cushon's team on one of their projects, used by thousands of people in the UK every day. Working on this project, I got to fully leverage my back-end development skills along with my MySQL database and overall security design knowledge. Among other things, I was tasked with:

Integrating with third party APIs
Designing automation for deploying API documentation to SwaggerHub
Refactoring, writing unit, integration and functional tests, implementing new features

Apr 2021 — Jul 2021

0.3 yrs

transferGo

Senior Software Engineer

Extracting logic from monolith project to microservice
Refactoring and cleaning up the code
Using new features of PHP 8 (constructor property promotion, attributes, named arguments etc.)
Code review

DDD
CQRS
Microservices
PHP 8
Symfony
Laravel
Doctrine
React
Redux
MySQL
Redis
GitHub
Amazon AWS (SQS, SNS)
Docker
PHPUnit

Jul 2020 — Feb 2021

0.7 yrs

BatmaidC

Technology Team Leader

Team management (performance review, one on one's)
Working closely with Product Owners and Managers
PHP Application Architecture
REST API design
Recruitment of new members for IT department
Code review

DDD
CQRS
Symfony
Doctrine
React
MySQL
Redis
GitHub
Amazon AWS
Docker
Firebase
Kubernetes
Ansible
Gatsby
behat
PHPUnit
jest

Apr 2019 — Jun 2020

1.3 yrs

isobarC

Technology Team Leader

Leading a team of 30 developers
PHP Application Architecture
Recruitment of new members for IT department
Code review
Co-operation with London Office on global COTY websites

Symfony 4+
Twig
Doctrine 2
React
MongoDB
MySQL
Redis
GitHub
GitLab
Amazon AWS Docker
Kubernetes
Ansible
GraphQL
Apollo
Gatsby
Next.js
behat
PHPUnit
jest

Nov 2014 — Mar 2020

5.4 yrs

Ars Thanea / SYZYGYC

PHP Team Leader

Leading a team of developers
PHP Application Architecture
Recruitment of new members for IT department
Code review
Scalable infrastructure that handles over 30 000 requests per minute (API for game Puzzle Craft 2)
Co-operation with Frankfurt Office on global Dr. Oetker website

Symfony 2-4
Silex
Twig
Doctrine
Angular
React
MongoDB
MySQL
Redis
GitHub
GitLab
Amazon AWS (EC2, Elastic Beanstalk, OpsWorks, ElasticCache, RDS, SNS, SES, S3, CloudFront etc.)
Docker
Vagrant
Ansible
Puppet
Chef

May 2012 — Oct 2014

2.5 yrs

FairSquare / Soft Integrated / Software FocusC

Senior PHP Developer, Team Leader, CTO

Leading a team of developers
PHP Application Architecture
Creating a development environment for the team based on virtualization tools (Vagrant, Puppet, VirtualBox), so that regardless of the platform on which the developer is working (Windows, Linux, OS X) application code is always run on shared virtual platform, which is similar to production servers.
Introducing new services to application architecture: MongoDB, Node.js, Sphinx
Application deployment on Amazon AWS servers using Capistrano
Negotiations with subcontractors and services providers
Office servers administration: router and development server
Writing tools to monitor communications between the systems
Programming in PHP 5, MySQL and Yii Framework
Implementation of the project management system and supporting tool (Redmine)
Recruitment of new members of the IT team

Mar 2010 — Apr 2012

2.2 yrs

Stalgast

Web Designer, Developer

Design & Development of projects: unox.pl, stalgast.com, relacje.stalgast.com, 20lat.stalgast.com
System integration between internet store (stalgast.com) and Microsoft Dynamics AX
Promotion of the company in Social Media
Graphic Design supporting marketing campaigns

Jun 2006 — Present

20.4 yrs

Polygon StudioC

Owner

Design, creation and development of applications based on PHP, Symfony, MySQL, React
Graphic Design of internet websites, identity, print advertisements, posters, billboards
Managing team of Freelancers
Recruitment of subcontractors
Linux servers administration
Design, creation and development of applications based on PHP 5, Zend Framework and MySQL

Aug 2005 — May 2006

0.8 yrs

NewOrder.plC

Web Developer, Web Designer, Team Leader

Design, creation and development of applications based on PHP, MySQL
Graphic Design of internet websites, identity, print advertisements, posters, billboards
Project Management

Jun 2004 — Aug 2004

0.3 yrs

Stalgast

Web Developer, Web Designer

Summer part-time job during which I've created 3 brand websites for the company

CampTRAINING

Training camp

School, university and the courses that kept the game sharp.

Jan 2026

boot.dev

Backend Development & Computer Science Fundamentals

Comprehensive self-paced curriculum covering backend development and CS fundamentals. Completed 11 courses spanning Python, Go, C, SQL, Linux, Git, data structures & algorithms, HTTP networking, object-oriented and functional programming, and memory management.

Aug 2021

LevelUp

Modern CSS Design Systems

Creating a modern CSS Design System, which is very flexible, easy to maintain and modify.

Oct 2020

devstyle.pl

Smart Testing Course

6 weeks course about testing applications: unit tests, integration tests, end to end tests, mocks, stubs, etc

Oct 2019

wesbos.com

Master Gatsby Course

Building modern websites is tough. Preloading, routing, compression, critical CSS, caching, scaling and bundlers all make for blazing fast websites, but extra development and tooling get in the way. Gatsby is a React.js framework that does it all for you. This course will teach you how to build your websites and let Gatsby take care of all the Hard Stuff™. Sanity.io is used as backend CMS and styled components for CSS.

Aug 2019

wesbos.com

Advanced React and GraphQL Course

The course has six main models — Users, Items, Orders, CartItems, OrderItems, and Roles — all of which are relational and showcase the power of relational GraphQL Queries. The app also includes many server side bits including authentication, permissions, sending email, uploading images, and charging credit cards. In addition to building both the frontend and backend of the application, participant also spend the last section of the course Testing the React application.

Apr 2019

wesbos.com

Learn Redux Course

A 20 video / 2.5 hour course to learn how to use Redux, React Router and React together.

Jan 2019

symfonycasts.com

PHPUnit, ReactJS Courses

Basic unit testing, Test-Driven-Development: how to do it, when to do it, Mocking and test doubles, creating mocks in PHPUnit & Prophecy, using data providers to run tests over and over again with different input. Integrating symfony application with React.js frontend application.

Nov 2018

wesbos.com

JavaScript30 Course

A free 30 day vanilla js coding challenge. I've learned to build 30 things in 30 days with 30 tutorials. No Frameworks, No Compilers, No Libraries, No Boilerplate.

Jun 2018

symfonycasts.com

Drupal 8, PHP 7, Symfony 4 Courses

PHP 7: Scalar type declarations and return types, nullable types, void types, class constant visibility, new error and exception handling Symfony 4 fundamentals: Services, Config & Environments, Upgrading to Symfony 4.

Nov 2017

symfonycasts.com

Symfony 3, Doctrine, REST, Gulp Courses

Doctrine relationships course, REST API - design, principles and implementation, Upgrading to Symfony 3, Symfony 3 fundamentals, setting up Gulp for frontend builds

Jun 2016

symfonycasts.com

OAuth 2, Symfony 3, Doctrine, BDD, Behat Courses

Nov 2014

APMG-International

Agile PM: Foundation

The underpinning philosophy and principles of Agile. The lifecycle of an Agile project, including alternative configurations. The products produced during an Agile project and their purpose. The techniques used and their benefits and limitations. The roles and responsibilities within an Agile project

Sep 2014

APMG-International

Agile PM: Practitioner

How to apply a variety of agile practices to a project, for example, workshops, the MoSCoW technique to define project priorities, iterative development and modeling. How to test, estimate and evaluate profit delivery in an Agile project. Facilitation and support mechanisms within an Agile project. The agile approach to manage and prioritize requirements

Nov 2013

szkolalinuxa.pl

Linux Administration Course

Course that was equivalent to first two levels of RHEL Certification: RHCSA and RHCE.

Jun 2009

PJWSTK

Computer Science

I've attended there on the evening studies, while at the same time running my company - Polygon Studio with 2 of my friends. The fun part was, that I didn't have to attend any non-IT classes, as they were taken from another course of studies (from Warsaw University of Technology)

Jun 2007

Warsaw University of Technology

IT Systems Management

Besides of studying I was also a member of ESTIEM student organization. This gave me an opportunity to develop some websites that were helping organization in spread of information across the members.

Jun 2002

4 SLO - Secondary School

Math and Computer Science Class

My first encounter with serious programming. On one assignment we were suppose to write algorithm for the game Collect Four, then the tournament was organized in which our programs were playing against each other in double elimination bracket.