Senior Full Stack Engineer (blockchain experience)

We’re looking for a Senior Full Stack Engineer to join the development of a high-security, multi-platform cryptocurrency wallet.

The project focuses on building a secure and user-friendly solution for storing and managing digital assets, with seamless synchronization across web and mobile platforms. A key goal of the product is to eliminate platform fragmentation while maintaining advanced security standards.

In the short term, the work will include a full renewal of the Wallet — an updated UI, refreshed design system, and the introduction of a points feature powered by SaaS services.In the long term, the team will focus on improving the product based on real user feedback, enhancing overall user experience, and maintaining high product quality by fixing and refining existing functionality.

Technology stack:

Language: TypeScriptFramework: Nextjs,(14+),NestJs, Tailwind CSS(Database Backend: PostgreSQL)System Control Version: Github, GitTechnology: Graphql

Responsibilities:

• Design, develop, and implement blockchain solutions using Node.js, JavaScript, and TypeScript, following clean code principles
• Collaborate with the team to define project requirements and architecture for blockchain-based applications
• Integrate blockchain functionality into new and existing systems and applications
• Perform code reviews and ensure the quality and security of the developed software
• Develop and maintain tests for components
• Collaborate with other developers and stakeholders to identify and implement improvements.

Professional requirements:

• Strong knowledge of JavaScript/Typescript, with a focus on writing clean, maintainable code
• 3+ years of commercial experience as a full-stack engineer with NodeJS (NestJS)
• Strong understanding of the event loop in Node.js and its implications on application performance and scalability
• 2+ years of commercial experience with ReactJS
• Familiarity with asynchronous programming concepts, including Promises and async/await
• Experience with optimizing code performance and addressing blocking and concurrency issues in event-driven systems
• Solid understanding of blockchain technology, cryptographic principles, and decentralized systems
• Experience with viem, ethers.js or similar libraries for interacting with blockchain networks
• Strong problem-solving skills and the ability to troubleshoot complex issues;
• Experience with testing frameworks such as Mocha
• Proficiency in writing unit tests, integration tests, and end-to-end tests for Node.js and blockchain components
• Experience with PostgreSQL databases and query languages (e.g. SQL)
• Familiarity with database design and optimization principles
• Ability to write efficient and scalable database queries and manage data persistence in blockchain applications.

Will be a plus:

• Experience with Key-Value storages
• Experience with Docker
• Experience with cloud infrastructure platforms.

We offer:

• Competitive compensation
• Social package (24 working days of annual leave, 5 paid sick days)
• Flexible working hours
• Challenging projects in diverse business domains and a variety of tech stacks
• Personal development and professional growth opportunities
• Work with talented, ambitious and family-feel teams
• Educational possibilities: corporate courses, knowledge hubs, and in-house English classes
• Compensation for your professional certification & support for your learning activities
• Opportunity to choose IT equipment you like
• Corporate social responsibility