Senior Java Back-end Developer in Boosty Labs

We are developing version 0.1 of a new layer-2 blockchain and super app. This involves creating a Substrate-based L2 chain and integrating it with a forked version of the Signal messaging application.

Project Stack: Java, Swift, Objective-C, Rust

Team on the project: Back-end Developer, Smart Contract Developer, Swift Developer, BA, PM, Designer, QA, Tech Writer, DevOps

Requirements:

• Over 5 years of experience in Java and Backend Technologies
• Hands-on experience with blockchain technologies and integrating blockchain systems with backend services
• Proficiency in SQL and NoSQL databases (Experience with database design, optimization, and management)
• Strong experience in developing and maintaining RESTful APIs
• Proficiency in API security, authentication, and authorization mechanisms
• Familiarity with CI/CD tools and practices (e.g., Jenkins, GitHub Actions, Docker)
• Experience with cloud platforms (e.g., AWS, Azure, GCP) and containerization technologies (e.g., Kubernetes, Docker)
• Upper-Intermediate English level

Responsibilities:

• Design and implement the integration of the blockchain accounts system with the user account system
• Ensure secure and efficient communication between the blockchain system and the backend services
• Develop and maintain backend services that support the messaging application
• Ensure high performance, scalability, and reliability of backend services
• Design, optimize, and manage the databases required for the project
• Ensure data integrity, security, and efficient data retrieval
• Develop, document, and maintain RESTful APIs for communication between the mobile app and backend services
• Implement robust security measures for APIs to protect against common vulnerabilities
• Collaborate closely with mobile developers to ensure seamless integration of backend and frontend components

What we offer: 

• Flexible working format (remote, office, or mix)
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations

Recruitment process: Recruitment Interview - Technical Interview