May 2024 – Aug 2025 · 1 yr 3 mos · Berlin, Germany · Hybrid

• GetYourGuide is a travel industry leader offering the best things to do around the world
• Improved Core Web Vitals for the Supplier Portal by reducing the Largest Contentful Paint (LCP) on the Insights page from 5.41s to 3.93s on desktop and from 7.75s to 6.22s on mobile. On the Auth pages, reduced LCP from 6.34s to 1.91s on the register page and from 2.38s to 0.97s on the login page
• Led the migration from PrimeVue 3 to 4, ensuring a seamless upgrade with zero downtime and maintaining 100% styling consistency across the application
• Implemented a GraphQL operation for email suppression checks with SendGrid, enhancing the booking communication service's efficiency
• Fixed a critical bug in the ticket submission process, maintaining system stability and preventing future disruptions

Feb 2022 – Feb 2024 · 2 yrs · Berlin, Germany · Hybrid

• TeamSupport is a B2B company helping businesses automate their Customer Service through live chat and messaging. I worked in a team of 20 people developing a messaging application.
• Stepped up as the technical lead for a team of 2 people during a pivotal transition, inheriting and completing three high-impact projects
• Implemented a code coverage policy that required a minimum of 75% for all new code, resulting in a 30% reduction in production bugs
• Led the architecture shift from Pusher to Firestore for the chat application, improving system scalability by 40%
• Integrated Large Language Models to add innovative features such as real-time sentiment analysis and conversation summarization, improving agent efficiency by 20% and customer satisfaction by 15%

Aug 2020 – Dec 2021 · 1 yr 4 mos · Berlin, Germany (remote from China) · Remote

• PaulCamper offers a private camper-sharing service in Germany, enabling easy and secure rentals of fully-equipped camping vehicles for unique travel experiences. I worked in a team of 15 people focusing on client performance.
• Spearheaded major performance improvements that raised our Core Web Vitals from 43 to over 90, playing a key role in a 25.7% increase in website visits
• Pioneered the use of TypeScript and rigorous unit testing across all projects, slashing bug incidence rates by over 50%
• Developed an automated script to generate sitemaps, expediting website indexing and further boosting search visibility
• Managed to integrate feature toggling, allowing for A/B testing and gradual feature releases, which contributed to a 15% increase in user conversion rates

Oct 2019 – Nov 2020 · 1 yr 1 mo · Santa Monica, California, United States · Remote

• NikaIT is an outsourcing company with customers from the USA. Played a pivotal role in the creation of a groundbreaking event production and audience engagement application for Mediaplatform, personally contributing to the development of 90% of its components.
• Engineered a versatile grid system for component alignment, significantly improving UI consistency and user experience
• Developed a library of reusable components, shared between producer and audience-facing apps, reducing development time by 30%
• Developed an analytics dashboard from scratch using D3.js, giving event organizers actionable insights to fine-tune their strategies

Feb 2019 – Oct 2019 · 8 mos · Russian Federation (remote from China) · Remote

• Played a key role in the development and optimization of a high-performance trading platform, interfacing closely with the CTO to deliver industry-leading solutions.
• Instrumental in architecting and developing real-time data processing features, reducing latency by 40% and improving user experience.
• Spearheaded the company's first CI/CD pipeline, reducing deployment time by 50% and ensuring zero downtime during updates.
• Implemented advanced data structures such as Fenwick trees and Red-Black trees, setting a new standard for computational efficiency in the company.

Jul 2018 – Feb 2019 · 7 mos · County Dublin, Ireland (remote from China) · Remote

• Instat Sport develops a platform offering detailed statistical analysis for sports professionals. I worked in a team of 5 frontend engineers and my focus was on a platform with a complex 2D game simulation.
• Spearheaded the development of a volleyball app from scratch, that helped scouts find relevant data related to player's characteristics and performance
• Engineered an interactive map feature that displayed complex player interactions and rendered intricate geometrical figures, enhancing user engagement and understanding of the game dynamics
• Contributed to a shared cross-team library by developing rendering utilities to display complex sports actions

Feb 2017 – Jul 2018 · 1 yr 5 mos · Zhenjiang-Yangzhou-Taizhou Metropolitan Area · Remote

• Built a variety of applications from scratch.
• Learned a lot of different code styles and how to adapt to them.
• I was a full-stack developer in most of my projects.
• Tech stack: React, Django, Node.js, Go, Core Web Vitals, Wordpress