Senior FullStack Developer
6 days ago
- Core Language: Javascript/Typescript;
- Framework knowledge: React.js (front-end), Node.js (back-end), Redux, Context API, Hooks;
- Tools: CI/CD experience, familiarity with npm/yarn, Webpack, Babel;
- Databases: NoSQL (MongoDB, Firebase), SQL for backend systems with Node.js;
- Cloud and DevOps: Familiarity with serverless architecture (e.g., AWS), experience with AWS services and infrastructure;
- System Design Focus:
Frontend: scalability, performance, statemanagement in React.js;
Backend: scalable, event-driven in Node.js; - Debugging & Testing: Approach to debugging, refactoring, clean and testable code;
- Familiarity with CI/CD pipelines, automating workflows;
- Experience with AWS services and cloud infrastructure;
- Strong educational background in Computer Science, Information Technology, or a related field;
- Language proficiency: Advanced English (minimum B2 level).
Nice to have:
- Practical experience with TypeScript;
- Express, NestJS, NextJS, React Native;
- GCP or Azure;
- Architecture discussions for scalable, maintainable systems for senior engineers;
- Docker for Node.js apps, third-party API integration (e.g., payment gateways, social login);
- Experience in fintech, payments, startups, scale-ups, or streaming tech.
Our Client: Klarna
Location: Warsaw (hybrid work, at least 3 days a week from office)
Rate: 165 - 195 PLN per hour
Cooperation model: B2B or Employment Contract
Start date: ASAP
Recruitment process: 1 timed Abstract and Logical Reasoning Test (up to 15 minutes); 1 short interview (up to 30 minutes)
Technology stack: JavaScript, TypeScript, Node.js, React, AWS, Docker, Redux, MongoDB, Firebase
Our client offers:
+ Great opportunity for personal development in a stable and friendly large multinational company;
+ Start-up mentality, small agile teams;
+ Global Reach: Impact millions with seamless shopping and payments;
+ Career growth and additional education.
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