Senior/Lead Front-End Developer
Kraków, Kraków
Shimi Sp. z o.o.
For one of our Partners — a rapidly growing technology company with its headquarters in the UK and a branch in Krakow, providing modern platforms and digital solutions used by thousands of customers across Europe — we are seeking a Senior / Lead Front-End Developer to join a team building a new generation of an embeddable UI component platform.
About the project:
You will work on an embeddable components platform — a set of reusable, framework-agnostic UI components powering various admin dashboards and products. This is a strategic, foundation-level initiative that shapes the future of multiple applications within the ecosystem.
Responsibilities:
Designing and developing the architecture of the embeddable component platform.
Prototyping and implementing new technological ideas.
Making key technical decisions impacting the scalability of products.
Hands-on implementation of modern, high-performing UI interfaces.
Collaborating with architects, backend teams, and product teams.
Ensuring high code quality, testability, performance, and adherence to standards.
Requirements:
6+ years of experience in modern front-end development.
Strong knowledge of TypeScript, JavaScript, and Web Components.
Experience with modern frameworks (React / Angular / Svelte).
Background in building design systems, component libraries, or SDKs.
Solid understanding of modular architecture and CI/CD pipelines.
A “builder” mindset: experimenting, learning quickly, iterating even faster.
English proficiency at B2+ / C1 level.
What we offer:
Long-term B2B contract with Shimi.
Rate up to 135 PLN/h net + VAT.
Location: Krakow (hybrid model: 2 days/week).
Benefits: co-financing for Luxmed and Multisport.
Work in an international environment, in a company with British roots and a highly experienced technical team.
Senior/Lead Front-End Developer
Senior/Lead Front-End Developer
Kraków, Kraków
Shimi Sp. z o.o.