Backend Developer for Web3 Gamified App (Node.js + Firebase + SKALE)

Job Description

We’re D4C – a next-gen startup pioneering gamified consumer brands using Web3, NFTs, and DAO-based governance . Our flagship app is live in beta, built natively for Android/iOS. We’re not another crypto-bro project – we’re here to reimagine how brands and people play, shop, and govern. We’ve fired our entire tech team – no drama, just clarity. Now we’re rebuilding the backend muscle with people who get it . You’ll be our lead backend dev , working on: ⚙️ Wallet generation + key management (custodial) using SKALE 🎮 Gamified badge unlock → NFT minting → DAO governance 🗳️ Community voting modules 🛍️ E-commerce + reward integrations 🎁 Experiences module (IRL + digital drops) We’ve done 60% of the work. Now we’re building the fun , scale , and power into it. 🧠 What You’ll Bring: Solid Node.js backend chops Understanding of custodial wallet flows Experience with blockchain infra (SKALE, EVM preferred) API design and secure token flows [Optional but 💯 bonus] Smart contract familiarity (not mandatory) 📩 How to Apply: LinkedIn Easy Apply is NOT enough. We only consider applicants who send us a cover letter to: 📧 apps@d4c.io Subject: Backend Role – [Your Name] Include: Your experience with Node.js & backend architecture What you know about SKALE or custodial wallet design How you would structure an NFT mint → badge system Your best past project (GitHub/Link + context) If you’re available to start in the next 14 days Cover Letter Questionnaire :- Have you ever implemented wallet creation on an EVM-compatible blockchain (e.g., SKALE, Polygon, Ethereum)? If yes, how did you manage private keys and user sessions? How would you implement badge-based unlocks in an app using Node.js + Firebase? Briefly describe the DB structure and logic. What’s your preferred approach to managing async events (e.g., purchase complete → badge unlock → NFT mint)?Queue systems? Firebase triggers? Something else? You’ve received a trigger to mint an NFT on SKALE for a user. What steps would you take to complete the process securely and scalably? Link us to your most relevant Node.js backend repo or project that includes user auth, DB structure, and API logic. Explain one tough bug you solved in that project. Show more Show less