Jakub Marciniszyn

Senior Software Engineer at eBay (Web3)

Manchester Area, United Kingdom

Summary

With over 10 years of development experience, I believe in crafting elegant solutions through minimalistic design and architecture. I value simplicity over complexity, ensuring every line of code serves a purpose. My approach centers on attention to detail, optimal performance, and delivering bug-free software. I thrive in collaborative environments where clean, maintainable code and thoughtful problem-solving drive successful outcomes.

Skills

Languages

Experience

eBay

Senior Software Engineer

- (2 years 8 months)
Manchester, England, United Kingdom

As a Senior Software Engineer in the Web3 division, I focus on building performant, user-centric applications with clean architecture. I prioritize code quality and maintainability while delivering features that matter. Currently expanding my expertise into Java and Kotlin with Spring Boot to strengthen full-stack capabilities and contribute to microservices development.

The Fragrance Shop

Lead Front End Developer

- (3 years 3 months)
Manchester, United Kingdom

Leading frontend development for a high-traffic e-commerce platform, I championed clean, performant code while coordinating weekly releases through agile methodologies. I collaborated closely with UX teams to translate designs into intuitive user experiences using Angular9, always prioritizing site performance and user satisfaction. Successfully integrated payment solutions like ApplePay and GooglePay, ensuring seamless checkout experiences. My focus remained on writing maintainable code and delivering bug-free features while working with Azure, .NET MVC, and modern frontend technologies.

Ocean Media Group Ltd.

Frontend Developer

- (2 years 1 month)
Manchester, United Kingdom
Frontend Developer (September 2018 - October 2019)

Leading development for a B2B platform, I architected a clean, efficient interface using Angular with SSR, prioritizing performance and user experience. I built a streamlined REST API with Laravel/Lumen, focusing on maintainable code and optimal response times. Successfully integrated legacy systems through thoughtful architecture, avoiding unnecessary complexity.

For the B2C brand Wedify, I collaborated with product and design teams to deliver a polished application within tight deadlines. I emphasized clean code practices while implementing Angular with Firebase, ensuring SEO optimization through SSR and seamless payment integration. Every feature was built with attention to detail and performance in mind.

I provided SEO consultancy, identifying core performance issues and implementing targeted solutions. My approach focused on meaningful improvements rather than over-engineering, working with offshore teams to deliver measurable results across multiple brands.

Frontend Developer (October 2017 - September 2018)

Manchester, United Kingdom

Confetti

PHP Web Developer

- (1 year 9 months)
Oldham, United Kingdom

I spearheaded a complete website rewrite, transforming legacy code into a clean, modern solution. Working in an agile environment, I broke down complex requirements into manageable tasks, always focusing on delivering quality over quantity. I collaborated closely with designers to ensure pixel-perfect implementation while maintaining optimal performance. The result was a streamlined, user-friendly website that prioritized simplicity and functionality - exactly what our customers needed.

TelTel Telecom

PHP Developer

- (1 year 1 month)
Manchester, United Kingdom

I drove technical initiatives by focusing on practical solutions that aligned with business objectives. Rather than over-engineering, I researched and recommended technologies that provided real value. I maintained and enhanced the CRM system with clean, efficient code while developing robust APIs using SOA principles. My approach emphasized reliable integrations with third-party systems and streamlined processes that eliminated unnecessary complexity while ensuring system stability.

Go4 Communications Provider

PHP Developer

- (3 years 4 months)
Manchester, United Kingdom

I designed and developed applications with a focus on clean architecture and maintainable code. Every feature I built was thoroughly tested and debugged to ensure reliability. Working with PHP, MySQL, and JavaScript, I maintained a robust CRM system while adhering to MVC patterns for clean separation of concerns. I prioritized code quality and performance, ensuring our applications ran smoothly and efficiently while maintaining company websites with attention to detail.

Freelance Web Development

Application Developer

- (1 year 6 months)
Manchester, United Kingdom

As a freelancer, I crafted a custom CRM solution from the ground up, focusing on clean design and efficient functionality. Using PHP and MySQL, I built a robust, database-driven application that prioritized user experience and performance. I delivered exactly what the client needed - no more, no less - on time and within scope, demonstrating my commitment to practical, effective solutions.

Education

The University of Salford

Web Design

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LO im. Tadeusza Kosciuszki

Mathematics & Physics

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Interests