Full Stack Engineer - Katana

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💎 Seniority level: Senior, 6–8+ years

📍 Location: EMEA

🔍 Industry: Software Development

🏢 Company: Polygon Labs

⏳ Experience: 6–8+ years

🪄 Skills: Backend DevelopmentDockerNode.jsPostgreSQLSQLAgileBlockchainEthereumExpress.jsFrontend DevelopmentFull Stack DevelopmentKubernetesMongoDBReact.jsVue.JsREST APINext.jsWeb3.jsCI/CDRESTful APIsMicroservicesJSON

Requirements:

6–8+ years of experience building full-stack web applications — from polished frontends to production-grade backends.
4+ years hands-on with blockchain protocols, smart contracts, or web3 dev tools.
Deep expertise with modern JS frameworks like React, Next.js, or Vue.js.
Comfortable with Node.js, REST APIs, microservices, and containerized stacks (Docker, Kubernetes).
You speak fluent SQL (Postgres, MySQL) and NoSQL (MongoDB, Firestore).
Able to read Solidity, integrate EVM-based contracts, and understand core blockchain concepts.
Proven success in agile teams, with a passion for shipping fast and making data-driven decisions.

Responsibilities:

Architect, develop, and maintain powerful web applications integrated with Katana’s cutting-edge Layer 2 blockchain infrastructure.
Create beautiful, responsive interfaces that simplify complex DeFi concepts for real-world users.
Develop robust backend systems and APIs that interact with smart contracts, manage blockchain data, and scale to meet user demand.
Partner closely with protocol and smart contract engineers to bring DeFi primitives (AMMs, lending, farming, and more) to the frontend in seamless, elegant ways.
Optimize data pipelines and application performance to handle high-throughput activity and real-time blockchain data.
Implement wallet connections, authentication flows, and security best practices that users can trust.
Keep tabs on the latest developments in DeFi, Layer 2 scaling, and the ever-evolving web3 landscape — and bring those insights back to the product.

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