Java Developer

Job Description

This is a remote position.

Java Backend Engineer — AI, Fintech & Blockchain

We are building an innovative product at the intersection of AI, fintech, and blockchain. We currently have a working MVP and are looking for a Java Backend Engineer to help migrate the existing backend to Java and build a scalable, secure, and maintainable architecture.

Responsibilities:

• Analyze the existing MVP backend and understand its business logic and architecture.
  

• Plan and execute the migration of existing backend services to Java.
  

• Develop backend APIs and services using Java and Spring Boot.
  

• Integrate and optimize databases, APIs, and external services.
  

• Maintain existing functionality throughout the migration process.
  

• Improve backend performance, security, reliability, and scalability.
  

• Implement automated tests and maintain high code quality.
  

• Collaborate with the product and engineering teams to deliver new features.
  

• Support deployment, monitoring, and ongoing backend improvements.
  

The ideal candidate is comfortable working with an existing codebase, making practical architectural decisions, and taking ownership of backend development from migration through production deployment.

Requirements

• Strong experience in Java backend development.
  

• Hands-on experience with Java 17+ and Spring Boot.
  

• Solid understanding of REST APIs and backend architecture.
  

• Experience with PostgreSQL, MySQL, or other relational databases.
  

• Familiarity with Hibernate, Spring Data JPA, and database migrations.
  

• Experience with authentication, authorization, and API security.
  

• Knowledge of unit testing and integration testing.
  

• Experience using Git, Docker, and CI/CD pipelines.
  

• Ability to understand, refactor, and migrate an existing backend codebase.
  

• Strong problem-solving skills and ability to work independently.
  

• Good communication and collaboration skills.
  

Preferred Qualifications:

• Experience migrating an existing MVP or backend system to Java.
  

• Background in fintech, payment systems, blockchain, or Web3.
  

• Experience integrating AI services or LLM APIs.
  

• Familiarity with AWS or Google Cloud Platform.
  

• Understanding of distributed systems and event-driven architecture.
  

Benefits

• Opportunity to build an innovative product combining AI, fintech, and blockchain.
  

• Direct involvement in key backend architecture and technology decisions.
  

• Opportunity to take ownership of the backend migration from MVP to a more scalable platform.
  

• Work with an ambitious, technology-focused team.
  

• Remote work and flexible collaboration arrangements, depending on the role.
  

• Opportunity to contribute to the product's long-term technical direction.
  

• Competitive compensation based on experience and engagement type.
  

Requirements
Strong experience in Java backend development. Hands-on experience with Java 17+ and Spring Boot. Solid understanding of REST APIs and backend architecture. Experience with PostgreSQL, MySQL, or other relational databases. Familiarity with Hibernate, Spring Data JPA, and database migrations. Experience with authentication, authorization, and API security. Knowledge of unit testing and integration testing. Experience using Git, Docker, and CI/CD pipelines. Ability to understand, refactor, and migrate an existing backend codebase. Strong problem-solving skills and ability to work independently. Good communication and collaboration skills. Preferred Qualifications: Experience migrating an existing MVP or backend system to Java. Background in fintech, payment systems, blockchain, or Web3. Experience integrating AI services or LLM APIs. Familiarity with AWS or Google Cloud Platform. Understanding of distributed systems and event-driven architecture.