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[GBL] Senior Full-Stack Software Engineer (React, Next.JS and Node.JS)

Kraków, Lesser Poland Voivodeship, pl💼 Full-time🗓 2026-07-20 → 2026-07-31

Core

Building scalable front-end and back-end features for a global digital platform serving millions of members.

Role type

Senior Full-Stack Software Engineer

Builds

Scalable front-end & back-end features, APIs, microservices, and integrations

Domain

Cloud-native digital platforms

Deliverable

production ML models | product features

Required skills

TypeScript, Node.js, React (Next.js), AWS (serverless), modern databases (DynamoDB, PostgreSQL, MySQL), authentication and security (Auth0, tokens, API security), unit and integration testing (Jest), APIs and microservices design patterns

Preferred skills

Agile delivery, cross-functional team collaboration, performance optimization, accessibility, CI/CD practices, architecture decisions

Technologies

React, Next.js, Node.js, TypeScript, AWS, DynamoDB, PostgreSQL, MySQL, Auth0, Jest

Responsibilities

Build scalable front-end & back-end features, Design and develop APIs and microservices, Implement secure data flows using cloud services, Optimize performance and user experience, Participate in architecture decisions, Troubleshoot production issues

Seniority

Senior, hands-on IC

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