Senior Java Back-end Developer

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

In the dynamic world of fintech, blockchain, and cloud engineering, Boosty Labs stands as a vanguard. With a rich history that dates back to the acquisition of Viktor Ihnatiuk's peer-to-peer lending company, Boosty Labs was born from the ambition of a young fintech veteran who, at the age of 21, brought together a team of industry experts to address the technological challenges of the future.

With a passion for product development and a portfolio that spans fintech, blockchain, and cloud storage projects, Boosty Labs has become a trusted partner to market-leading companies, collaboratively developing digital solutions that address customer needs and enhance business performance.

As a preeminent blockchain development company in Europe, Boosty Labs boasts a formidable team of over 100 developers, dedicated to serving an impressive roster of clients in the crypto industry. These clients include globally recognized names such as Consensys, Storj, NEM, Ledger, Near Protocol, Bloom, Onomy, Trustana, and a host of trailblazers in the NFT space.

With expertise in cutting-edge Web3 protocols like Rainbow, OpenSea, Twilio, zkSync, STORJ, and POKT, Boosty Labs' technology stack is crafted to meet the evolving demands of the Web3 era

Location
Remote