About OpenTrain
OpenTrain is the centralized, open platform where AI training and data-labeling freelancers find work, consolidate opportunities across platforms, and build a unified AI training portfolio they control. We make specialized AI training work easier to track, apply for, and grow into a durable freelance career.
About this role
OpenTrain is recruiting for a Java Developer to contribute to the training of next-generation AI systems. This role emphasizes applying existing Java development expertise to shape how AI models learn and perform through real-world input, focusing on high-quality code delivery and system reliability.
What you will do
- Design, develop, and maintain scalable backend systems using Java and Spring Boot.
- Architect robust microservices solutions to support complex application requirements.
- Collaborate with project teams to review technical specifications and deliver high-quality code.
- Contribute expert insights to improve application performance, reliability, and security.
- Participate in code reviews and provide constructive feedback to peers.
- Document technical processes and solutions with clear, concise written communication.
- Troubleshoot, debug, and optimize backend systems as needed.
Required skills
- Expert proficiency in Java programming language.
- Hands-on experience with Spring Boot framework for backend development.
- Strong knowledge of microservices architecture and design principles.
- Demonstrated ability to write clean, maintainable, and efficient code.
- Exceptional written and verbal communication skills, with a keen attention to detail.
- Experience collaborating with remote teams in a work environment.
- Solid understanding of REST APIs, data structures, and backend best practices.
Helpful background
- Exposure to cloud platforms such as AWS, Azure, or Google Cloud.
- Prior experience working on AI-driven or data-intensive projects.
- Background in high-availability or distributed systems.
Compensation
This role offers an hourly rate between $30 and $90 USD.