Sebastian Pietrzykowski

Fullstack Developer in training at mateAcademy | JavaScript | React | Node.js | SQL

Leverkusen, North Rhine-Westphalia, Germany

About

Active Full-Stack Development Student @ mateAcademy | 3 Years of Coding Journey | Former Business Owner & Operations Manager After a diverse international career across the UK, Spain, and Germany, I have dedicated the last 3 years to mastering software development. My journey began with self-driven exploration, and I am now professionalizing my skills as a full-time Full-Stack student at mateAcademy. I am driven by the challenge of turning complex logic into functional, user-friendly web applications. Why I bring a unique perspective to your team: Current Intensive Training: I am currently an active student in the mateAcademy Full-Stack program, undergoing rigorous daily training in JavaScript (ES6+), React, Node.js, and SQL. This builds upon my 3 years of self-taught foundation. Entrepreneurship & Business Ownership (Spain): For 3 years in Gandia, Spain, I successfully built and managed a property management business from the ground up. Handling everything from operations to client relations in a foreign market taught me high-level responsibility, financial discipline, and how to deliver value in a competitive environment. Managerial Experience (UK): During my 6 years in the UK, I managed teams in fast-paced environments like Pizza Hut. This experience shaped my leadership skills and taught me how to coordinate complex workflows and maintain high service standards. International Adaptability & Languages: Living and working in the UK, Spain, and Germany (6 years in Germany) has made me a highly adaptable professional. I am fluent in English (B2), proficient in German (currently pursuing B2 level), and native in Polish. Resilience & Problem-Solving: My background in technical maintenance (plumbing) and management has taught me how to stay calm under pressure and solve problems systematically—a trait that defines my approach to debugging and software architecture. I am currently open to Junior Frontend / Full-Stack Developer opportunities across all of Europe. I am fully mobile, highly motivated, and ready to contribute to a forward-thinking international team. Tech Stack: JavaScript, React, HTML5, CSS3, Node.js, SQL, Git. Portfolio: https://github.com/Sebpie0203?tab=repositories Contact: +49 15 75 82 765 15

Experience

  • Rozwój zawodowy at Career Break
    Jan 2023 - Present · 3 yrs 6 mos

    Currently enrolled in an intensive, full-time Full-Stack Developer program at mateAcademy, focusing on building production-ready web applications. Developing core competencies in modern technologies: HTML5, CSS3, JavaScript (ES6+), React, Node.js, and SQL. Prior to mateAcademy, completed several specialized courses on Udemy, covering foundational programming logic and web design principles. Actively building a GitHub portfolio and working on real-world coding challenges and peer-to-peer code reviews.

  • Heating Engineer / Supporter at Work in Time Frechen / B&S Haustechnik GmbH
    Jan 2020 - Jan 2023 · 3 yrs 1 mo

    Technical Troubleshooting & Repair: Diagnosing and repairing hydraulic system failures, including water supply, drainage, and heating installations, ensuring full operational efficiency and safety compliance. Preventative Maintenance & Installations: Performing scheduled inspections and installing new hydraulic components and fixtures, focusing on precision, long-term durability, and resource optimization. Technical Documentation & Planning: Reading and interpreting technical drawings, estimating material requirements, and documenting completed works to maintain high service standards.

  • Owner / Founder at Self-employed / Property Management Services
    Oct 2017 - Apr 2020 · 2 yrs 7 mos

    Comprehensive Operations Management: Full-cycle management of premium holiday rentals, including coordinating guest check-ins/check-outs, ensuring high cleanliness standards, and overseeing property maintenance to guarantee a seamless stay. Logistics & Guest Relations: Providing high-end hospitality services, such as organizing airport transfers and acting as the primary point of contact for international guests, resolving any issues promptly and professionally. Business Administration: Independently managing all aspects of the business, including workflow planning, local vendor coordination (repairs/cleaning), and maintaining property listings to ensure high occupancy rates and positive reviews.

  • Manager at Pizza Hut UK & Europe
    2012 - 2017 · 5 yrs

    Operational Excellence & Performance Management: Directing daily restaurant operations, ensuring strict adherence to global brand standards, and optimizing key performance indicators (KPIs) such as food cost, labor efficiency, and overall profitability. Guest Experience & Service Leadership: Championing a customer-first culture by training staff in high-quality service techniques, managing guest feedback, and resolving complex issues—leveraging strong interpersonal skills developed through years of independent client management. Team Leadership & Team Development: Overseeing recruitment, onboarding, and continuous professional development for the team. Managing scheduling, logistics, and ensuring full compliance with health, safety (HACCP), and labor regulations.

  • Junior Investment Advisor at ING Bank Śląski
    2006 - 2011 · 5 yrs

    Financial Analysis & Due Diligence: Assisting in the evaluation of investment opportunities by performing detailed financial analysis, market research, and due diligence to support data-driven decision-making. Portfolio Monitoring & Reporting: Supporting the management of existing investment portfolios, tracking performance metrics, and preparing comprehensive reports and presentations for senior stakeholders. Market Research & Valuation: Conducting industry-specific research and trend analysis, utilizing valuation models (e.g., DCF, comparable companies) to assess potential risks and returns on investment.