Jakub Sarnowski Email & Phone Number

Greater Poland Voivodeship, Poland

Greater Poland Voivodeship, Poland

Collaborate with a multidisciplinary team on a web3 application by developing the user interface, integrating with external service providers, and minimizing technical debt.

Machinode is a hobby project created by me and my friends. We've been occasionally building games and participating in many game jams, wherein a very little period of time we manage to create a playable game and show it to the world.

I had the opportunity to work with a client from Saudi Arabia on a project that required the creation of highly complex animations using React and GSAP. This project was particularly challenging and rewarding, as it pushed the boundaries of what could be achieved with these technologies. In addition to this, I collaborated with a team to build a.

Working on a large-scale reactive Angular application, developing advanced reporting charts. A big part of the job was improving the quality of the codebase and gradually reducing the technical debt.

Working with various clients on various products, helping to solve their business problems with top quality solutions. Also taking part in the recruitment process: conducting technical interviews with candidates; providing detailed feedback for candidates with suggestions for growth.

Building an ecommerce web application based on Next.js.Investigating and fixing performance bottlenecks:- Discovering and fixing plenty of unnecessary re-renders on complicated views (product listings with extensive filtering) with browser and external OSS tooling (Chrome Performance Profiling, Why Did You Render)- Fixing slow initial response times on SSR.

I was responsible for developing both the brand identity and software solutions for a personal trainer, covering the entire technology stack from front-end to back-end. I utilized cutting-edge technologies such as Next.js and React for creating a dynamic and responsive user interface, ensuring an engaging experience for users. On the server-side, I.

Poznań, Woj. Wielkopolskie, Polska

Building large-scale applications and microservices in a distributed infrastructure with the following technologies:- JavaScript (frontend applications, React + Redux)- Node.js (microservices, Koa, Express)- Java (microservices, Spring)- Kotlin (microservices, Spring)- PHP (big monolith based on Symfony)- Kafka (message queue)- Hermes (message.

Poznań, Woj. Wielkopolskie, Polska

Single-handedly working on a complex React + Redux application: - Trying to solve problems by myself, but also boldly asking questions whenever I'm stuck at something- Doing code review and asking questions in order to learn from others and become more independent- Trying as many challenges as I manage to handle in order to grow and learn fastSharing.

Poznań, Woj. Wielkopolskie, Polska

Creating automated tests for a large infrastructure filled with plenty of microservices:- Creating multi-browser tests based on Selenium and Selenium Grid (Java, JavaScript)- Creating automated and scheduled jobs for continuous integration (Bamboo)- Creating performance tests for microservices (JMeter)- Proposing new technologies in the company in order to.

Poznań, Woj. Wielkopolskie, Polska

Creating a log management tool:Backend- Using.NET Web API, Elastic Search, MongoDB- Creating authentication and authorization solutions- Creating libraries for easy integration with the logging platformFrontend- Using AngularJS 1.x, RequireJS, SemanticUI- Designing the whole product from the ground up

Poznań, Woj. Wielkopolskie, Polska

Managing quality assurance of a large-sized product:- Doing manual tests on every pull request- Creating descriptive, easy to understand bug reports (Redmine)- Checking data correctness of presented calculations and exported documents- Creating automated tests written in C# (Selenium)- Preparing test environments for easy bug reproductionsAssist in the.