Sergii Ievliukhin

• Led the transition to micro-frontend and micro-service architecture, enhancing application security and performance, as well as unifying the customer experience across different markets and channels.

• Designed and developed a B2B solution www.elco.de that streamlined ERP integrations, resulting in a smoother user experience and expanded market reach to the US and Italyfor Germany.
• Joined Spanish fashion brand www.desigual.com and helped with the development of a B2B solution based on SAP Commerce. Did performance and UX improvements, as well as background process optimizations, increase checkout speed up to 60%.
• Joined the team and helped with development and support of B2B product for a pharmacy industry leader in the EU: Lloyds (McKesson). Was able to make it possible to do orders with 1k+ different items in the cart.
• Also helped Lloyds with several B2C solutions: vitusapotek.no, lloydspharma.be, lloydsapotek.se, etc. Helped to improve the checkout process: single-page checkout with Klarna payment method.
• breakthrubev.com - I helped with the development of the backend API and was in charge of product lifecycle management and integrations to automate and speed up the product release, review, and confirmation process.
• www.ghdhair.com - helped to design a headless solution based on React.js and B2C OCC API.
• Managed to successfully release worldwide B2B commerce solution, www.gelighting.com, for GE (after failed attempts of the previous team). So it makes revenue for the client around the world: Asia, North America, and EU countries. GE Lighting's estimated annual revenue is currently $164.8M per year.
• Other clients: USABB, ESAB, Sarnova, etc.

In the scope of billing application development, my teams and I designed and developed a metadata-driven framework that allowed us to create applications with an extendable service and model layer architecture, saving time on API for CRUD operation endpoints and DAO implementation.

The architecture allowed us to provide several adapters for different RDBMS, like MySQL, PostgreSQL, and NoSQL MongoDB, with a few different algorithms to persist and search data.

A clear understanding of Scrum principles and active usage of TDD allowed us to successfully deliver user stories for more than 1 year in a row without any failures, having only 1 week-long sprint, and without any code freeze periods at all.