Backend Developer

🕒 July 27

🇷🇸 Serbia – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 38%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Solflare

WebsiteLinkedInAll Job Openings

51 - 200 employees

₿ Crypto

🔧 Hardware

💳 Fintech

Crypto • Hardware • Fintech

Solflare is an all-in-one, self-custodial wallet and payments platform built for the Solana blockchain. It provides a mobile and browser wallet for trading, staking, and managing Solana tokens (including best-route swaps, smart auto-slippage, and limit orders), offers a tap-to-sign hardware wallet called the Shield (EAL6+ secure element), and a Solflare Card to spend USDC and borrow against SOL without relinquishing private keys. Solflare emphasizes security (self-custody and hardware protection), broad token support, and an integrated experience for DeFi and Web3 users on Solana; it reports millions of users and billions in assets/trades managed.

📋 Description

• Design and implement scalable and robust backend services. • Develop APIs and integrate third-party services and Solana RPCs. • Manage databases (PostgreSQL, MongoDB) and ensure data integrity and security. • Implement caching mechanisms using Redis for improved performance. • Work with PrismaJS for efficient database access and management. • Deploy and manage applications on cloud platforms (DigitalOcean, Google Cloud Platform). • Utilize BullJS for background job processing and Cron for scheduling tasks. • Write unit and integration tests using Jest to ensure code quality and reliability. • Collaborate with frontend developers and other team members to ensure seamless integration. • Stay updated with the latest trends and technologies in web development and blockchain. • Design and implement a microservices architecture for scalability and maintainability.

🎯 Requirements

• Minimum of 4 years of experience in backend development with a focus on web2/web3 technologies. • Proficient in Node.js, Express.js, PostgreSQL, MongoDB, Redis, and PrismaJS. • Experience with cloud services (Google Cloud Platform, DigitalOcean) and DevOps practices. • Experience with unit and integrations test using Jest. • Knowledge of event-based architecture, microservices design patterns, and ability to design scalable systems. • Excellent problem-solving skills and attention to detail. • Strong communication and collaboration skills. • Familiarity with blockchain technologies, specifically Solana, is a plus. • Proficiency in machine learning concepts and experience in applying them to real-world problems. • Experience in designing and optimizing backends to handle large volumes of data efficiently.

🏖️ Benefits

• individual education budget • cool team buildings • private health insurance