Julek Zarzycki Email & Phone Number

Wrocław, Pl

- Joined the company as the 5th developer and have witnessed significant growth, with the team now comprising 80 developers. Initially focused on the payments and payroll areas, utilizing Ruby, Ruby on Rails, GraphQL, PostgreSQL, JavaScript, and React.- In the first month, designed and built a robust payout system for processing and sending money to contractors worldwide, demonstrating a strong ability to deliver critical solutions efficiently.- Took on the role of Tech Lead for a team of 10 individuals, overseeing projects related to payments, invoicing, expenses, and payroll. Successfully led the team in delivering complex features and ensuring the smooth functioning of crucial financial processes.Actively participated in the architecture guild, shaping the overall architectural vision for multiple teams within the company.- Currently a part of the payroll and invoicing team, taking on responsibilities for designing and delivering numerous features and epics. Actively involved in mentoring junior developers within and outside the team, fostering their growth and development.

- Advocated for and led the initiative to split the monolith into strongly isolated bounded contexts, utilizing Domain-Driven Design (DDD) strategies and conducting event storming workshops. This enabled the extraction of microservices, enhancing scalability and maintainability.- Actively participated in the technical recruitment process, conducting interviews and contributing to the optimization of recruitment procedures.

Wroclaw, Lower Silesian District, Poland

- Played a key role as part of a Scrum team in building an internal tool from scratch, which was one of several macro-services composing a comprehensive SaaS application in the supply chain risk management space. This tool efficiently processed thousands of articles daily, providing essential insights and support to internal employees.- Made significant contributions to performance improvements by optimizing Sidekiq processes, significantly speeding up the processing of 1 million jobs daily.- Promoted to the role of Tech Lead and became a member of the Architecture Committee, collaborating closely with the product owner and various internal teams across departments. Actively shaped the architectural vision both within the team and the entire engineering department.

- Served as a Ruby Lead Developer in a team of 5 developers, responsible for designing the architecture, managing the expanding team, and closely collaborating with the product and business sides of the operation. Actively contributed to coding on a daily basis.- Led the development of a B2C solution aimed at individuals seeking to order prints (such as business cards and posters) without existing designs. Designed and implemented an online editor for pre-provided templates, an e-commerce platform, API integrations with printing houses, and a marketplace connecting designers with clients.- Utilized Ruby, Ruby on Rails, Docker, PostgreSQL, and AngularJS, with later efforts focused on transitioning parts of the system to React.js for enhanced performance and flexibility.- Developed a service that converted Adobe InDesign files into images and JSON files, enabling seamless integration with our online template editor for customization and editing purposes.

Wrocław, Woj. Dolnośląskie, Polska

- Worked as a full-stack developer using Ruby, Ruby on Rails, AngularJS, JavaScript, Docker and PostgreSQL on a variety of projects for a small software agency, gaining experience in building Minimum Viable Products (MVPs) as well as maintaining legacy applications.Developed a legacy application for a Polish logistics company, honing my skills in refactoring and optimizing code.- Built a unique web application that allowed users to design gardens in 2D and 3D using three.js, showcasing my ability to work with cutting-edge technologies and develop engaging user experiences.- Contributed to the development of a social app with chat functionalities for doctors treating breast cancer patients, demonstrating my ability to build complex and highly functional applications in a sensitive and challenging domain.- Worked on a web application that collected data from devices worn by hospital patients to measure pain levels, gaining experience in working with healthcare data and developing solutions to improve patient outcomes.- Developed a web application for a food kiosk that allowed factory workers to easily order food, showcasing my skills in building intuitive and user-friendly interfaces for complex workflows.- Contributed to the development of a web application that automated message responses across multiple social network apps, including Facebook, Instagram, and Twitter, demonstrating my ability to build scalable and efficient solutions.- Worked on a project for one of the largest German competitors to Airbnb, gaining experience in building a robust and reliable platform for a highly competitive market.

- Worked on a large, legacy project built on Rails 3.2, gaining valuable experience in maintaining and updating complex codebases. The project, which was developed for a major German dictionary publisher, utilized a non-Rails approach, with an emphasis on using Service Objects to encapsulate business logic and improve code organization.- Practiced Extreme Programming (XP) methodology, working closely with clients from day one to deliver high-quality software on time and on budget.- Learned to work effectively in a remote, distributed team environment, developing strong communication and time management skills.- Developed an interest in Domain-Driven Design (DDD) during my time at Arkency, which has influenced my approach to software development ever since.