Backend developer for crypto wallets

Solflare is a Solana self-custody wallet that puts people in control of their digital assets. Around 4 million users control $20 billion in funds through our wallet. What started as a team of 6 in 2020 building Solana's first wallet, has grown into a team of 150 worldwide. We’re remote-first, but if you happen to stop by in Zagreb, Croatia, or Belgrade or Novi Sad, Serbia, we have an office you can work from if that’s what you prefer. Wherever we work, we share the same goal: a Web3 wallet for everyone, with financial freedom in their hands.

• 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.

• 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.
• Будет плюсом: 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

• Our remote-first setup gives you flexibility over how you work.