• Design, develop, and maintain high-performance, scalable Back End services using Java and related technologies.
• Work with NoSQL (MongoDB) and SQL databases (DB2, Postgres) to manage and query large datasets efficiently.
• Develop, test, and deploy Spring Boot-based applications with a focus on microservices architecture.
• Implement GraphQL endpoints to allow efficient data querying and integration with Front End teams.
• Collaborate with Front End developers, product managers, and other stakeholders to deliver robust Back End solutions.
• Ensure the application architecture adheres to industry best practices for scalability, security, and maintainability.
• Implement cloud-based solutions using AWS, including deployment, monitoring, and scaling of Back End services.
• Troubleshoot and resolve Back End performance issues, bugs, and other technical challenges.
• Write unit tests, perform code reviews, and ensure the quality of the codebase.
• Continuously improve the Back End system with a focus on performance, scalability, and security.
• Required Skills and Qualifications:
• Strong experience with Java development, with a deep understanding of Java principles and best practices.
• Proficiency in NoSQL databases like MongoDB and SQL databases like DB2 and Postgres.
• Hands-on experience with Spring Boot and building microservices architectures.
• Experience in developing and integrating GraphQL APIs.
• In-depth knowledge of AWS services (EC2, S3, RDS, Lambda, etc.) for cloud-based solutions.
• Solid understanding of RESTful API principles and experience in developing and consuming APIs.
• Strong problem-solving skills with the ability to quickly learn and adapt to new technologies.
• Ability to work in an Agile development environment and collaborate in cross-functional teams.
• Excellent communication skills and the ability to explain technical concepts to non-technical stakeholders

BLOCKCHAIN TECHNOLOGIES LLC is an equal opportunity employer inclusive of female, minority, disability and veterans, (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. BLOCKCHAIN TECHNOLOGIES LLC will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters. Nor will BLOCKCHAIN TECHNOLOGIES LLC require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract