Miłosz Sobczak

Experience

1. since 2026

   Pasteur Labs & ISI

   Staff Product Software EngineerJul 2026 - now

2. 2022-2026

   Upbound

   Staff Software EngineerJan 2024 - Jul 2026 Senior Software EngineerApr 2022 - Jan 2024Seattle, WA (remote)

   Led architecture and implementation of product-facing systems at scale.

   • Designed and built an interactive graph UI of Kubernetes resource relationships, improving observability and decision-making.
   • Drove unification of the front-end architecture across repositories, establishing consistent patterns and reducing fragmentation.
   • Took part in the React to Next.js migration, improving performance and long-term maintainability.
   • Optimised the GraphQL data layer and worked with back-end services (including Go) for better reliability and performance.
   • Collaborated on platform-level concerns (Kubernetes / Crossplane) while owning the product-facing experience.
   • Contributed to engineering hiring and interview design.

   TypeScript, React, Next.js, GraphQL, Go, Kubernetes, Crossplane

3. 2021-2022

   Altimetrik / PayPal

   Tech Lead EngineerApr 2021 - Mar 2022

   Technical leadership and architectural direction for PayPal's e-commerce integrations.

   • Shaped application architecture and technical standards across teams.
   • Led development of reusable, high-performance components integrated into multiple e-commerce platforms.
   • Worked across the stack (Node.js, TypeScript, Web Components) to deliver reliable integrations.
   • Balanced delivery, code quality and long-term maintainability.

   TypeScript, Web Components, Node.js, PHP, E-commerce

4. 2020-2021

   EPAM Systems / UBS

   Tech Lead EngineerJan 2020 - Apr 2021Poland

   Technical leadership on high-performance web applications for financial institutions, including UBS.

   • Designed and implemented a framework-agnostic navigation system used across multiple projects.
   • Integrated micro-frontends to increase modularity and development efficiency.
   • Worked closely with product and back-end teams on system-level decisions and integrations.
   • Contributed to performance, reliability and overall architecture of the applications.

   React, Stencil, Preact, Node.js

5. 2019

   zoovu

   Head of Custom DevelopmentApr 2019 - Dec 2019

   Led a team of ~20 engineers delivering custom solutions for Amazon, Microsoft, Whirlpool and Canon.

   • Defined and raised development standards and architectural practices.
   • Owned estimation, delivery and technical direction of projects.
   • Designed scalable architectures with Vue.js, TypeScript, Node.js and AWS.
   • Bridged front-end, back-end and infrastructure concerns to deliver end-to-end solutions.

   Vue.js, TypeScript, Node.js, AWS

6. 2017-2019

   Euro Bank S.A.

   Lead Software EngineerDec 2017 - Mar 2019Poland

   • First front-end hire; rethought how the bank's applications were built and structured.
   • Designed and built a new design system of reusable components.
   • Improved application architecture and development processes across the front-end stack.
   • Collaborated with back-end teams on integrations and overall system quality.

   Angular, RxJS, TypeScript

7. 2014-2017

   Pixers

   Senior Software Engineer / Team LeadDec 2015 - Nov 2017 Front-end DeveloperFeb 2014 - Dec 2015Poland

   • Rebuilt the e-commerce front end as modular ES2015 and Vue.js components, replacing a non-scalable jQuery codebase.
   • Led the team as it grew to five people, mentoring and setting technical direction.
   • Improved architecture, maintainability and delivery speed of the product.

   ES2015, Vue.js, CSS, PHP

8. 2012-2014

   Podpisz.to

   Co-founder & Software EngineerJul 2012 - Feb 2014Bolesławiec

   • Co-founded the start-up and raised investment for a four-person team.
   • Built the product from scratch: full-stack development, design and team management.
   • Owned end-to-end delivery of the application.

   CodeIgniter, jQuery, PHP

9. 2012-2014

   Ensila Sp. z o.o.

   IT SpecialistMay 2012 - Feb 2014

   • Full-stack development and tech ops across the company.
   • Handled both application development and technical operations.

10. 2008-2012

    Freelance

    Web DeveloperJul 2008 - Jul 2012

    • Found my own clients and built websites and web applications for them.
    • Worked across the full stack (PHP, Ruby on Rails, JavaScript frameworks).

    PHP, Ruby on Rails, Backbone.js

Toolbox