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Alex ZhukAZ

Alex Zhuk

Full-Stack Engineer | Generative AI, NodeJS, React

€700/day
Berlin, DE
8-15 years

Average response time: 1 hour

About Alex

I am a Full-Stack AI Engineer with over a decade of experience in the tech industry. After leading teams of up to 15 people at companies like Shopify and Klarna, I've transitioned back to hands-on full-stack development. My expertise spans Generative AI, Mobile (React Native), Web, and Developer Experience, with a background that includes both early-stage startups and BigTech.
  • English

    Native or bilingual

  • Ukrainian

    Native or bilingual

  • Russian

    Native or bilingual

  • German

    Basic

Can work on-site
Berlin (up to 50km)

Experience

  • Self-Employed
    Full-Stack AI Engineer
    DIGITAL AND IT
    February 2024 - Today (2 years and 4 months)
    Berlin, Germany
    Consulting and building my own projects in the field of generative AI.
    Worked on:
    - Telegram bot for image generation (FLUX LoRA, model fine-tuning, Llama)
    - Day-to-day task automation tool (OpenAI, LangChain)
    - Telegram bot for Vipassana meditators (OpenAI, LangChain, LangSmith)
    React.js Typescript Spring PostgreSQL Langchain OpenAI Material Design MySQL TypeORM
  • Shopify
    Engineering Group Manager - Shop Infrastructure Group
    E-COMMERCE
    May 2022 - June 2023 (1 year and 1 month)
    Berlin, Germany
    Directly led three teams forming the Shop Infrastructure Group.
    Our primary focus was to develop and maintain the infrastructure of the Shop app.

    • Unified tools, patterns, and infrastructure across multiple backend codebases
    • Established reliable metrics for the Shopify Shop app's boot and screen navigation, enabling teams to speed them up by up to 70%
    • Reduced Shop app boot time by approximately 30%
    • Developed a suite of E2E smoke tests to ensure the main branch remains functional at all times
    • Provided consistent support for 40+ teams My responsibilities:
    • Developed the roadmap and long-term vision for the Shop Infra Group
    • Enhanced the on-call process across the Shop department
    • Established development processes and best practices
    • Mentored team members for individual career growth
    • Oversaw the technical direction and architecture of our systems

    Group size: 15 people
    React Native Typescript Ruby on Rails React.js Node.js
  • Klarna
    Engineering Manager - App Performance Tooling team
    BANKING AND INSURANCE
    April 2021 - April 2022 (1 year)
    Berlin, Germany
    • Built tooling that enabled a 60% decrease in Klarna's React Native app load time
    • Built tooling preventing performance regressions My responsibilities:
    • Combined Engineering Manager and Product Manager roles
    • Set up processes and development practices
    • Individual career development of team members
    • Oversaw technical direction and architecture of our systems


    Direct reports: 6 software engineers
    React Native Android iOS Node.js Typescript Appium

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Education

  • Bachelor's degree
    Odesa Mechnikov National University
    2012
    Computer Science

Skill set

Categories