We are developing a miniApp in Telegram for exchanging cryptocurrencies for fiat and vice versa. Our service ensures fast, convenient, and secure exchange with minimal fees.

We are currently looking for a Backend Developer (Spring Boot) to continue development and support the project.

What you'll be doing:

• Developing and maintaining the backend for the Telegram miniApp using Spring Boot.
• Integrating with TronGrid (receiving/sending USDT TRC-20).
• Developing and improving the admin panel (user management, orders, exchange rates).
• Creating REST API for the frontend (Vue.js) and integrating with the Telegram bot.
• Optimizing the PostgreSQL database, setting up caching in Redis.
• Implementing secure authentication (JWT, OAuth 2.0).
• Ensuring server stability and fault tolerance.

What we are looking for:

• At least 2 years of experience with Java + Spring Boot.
• Strong knowledge of REST API, PostgreSQL, Redis.
• Ability to work with Docker (basic level required).
• Understanding of authentication principles (JWT/OAuth 2.0).
• Experience integrating external APIs (e.g., payment gateways, crypto APIs).
• Knowledge of multithreading and transaction processing.
• Basic knowledge of RabbitMQ/Kafka (nice to have, but not required).
• Experience with fintech or crypto-related projects is a plus.

What we offer:

• Salary $2500-3000 per month.
• Remote, office, or hybrid work (Czech Republic).
• Flexible working hours (full/part-time, full-time preferred).
• Opportunities for growth in crypto-fintech.
• Long-term collaboration (with potential for salary increases based on performance).

How to apply?

Send your resume + code samples (GitHub, portfolio) to Telegram @xchangio_support or email hiring@xchang.io

Looking forward to working with you! 🚀