Lead Backend Development Engineer

Established in 2018, Bybit is one of the world’s leading cryptocurrency exchanges and digital financial platforms, serving over 80 million users across more than 200 countries and regions. Powered by world-class technology and a user-first mindset, Bybit delivers a seamless ecosystem across trading, payments, wealth management, custody, institutional services, and Web3 — connecting users to the future of digital finance.

Our core values define how we build. We listen, care and improve to create products and experiences that put users first. Backed by a global team of ambitious builders, problem-solvers, and innovators, we foster a high-performance and fast-moving environment where talent is empowered to drive real impact at the global scale. Supported by 24/7 multilingual customer service and a strong commitment to innovation, we are shaping the future of finance through technology, collaboration, and bold execution.

Today, Bybit is recognized as one of the most trusted and transparent platforms in the digital asset industry, continuing to expand its global presence while building the infrastructure for the next generation of financial services.

#### Job Overview

We are looking for a skilled Java Developer with strong mastery of core backend systems. In this role, you will drive the evolution of our core distributed transaction engine and high-concurrency Instant Messaging (IM) platform.

Beyond deepening core business applications, you will act as a key technical backbone for strategic AI Shopping Assistant projects, exploring the integration of the Java ecosystem with Large Language Models (LLMs) to drive intelligent business transformation.

#### Key Responsibilities

• Core Java Development: Design and build high-concurrency order processing centers, payment & settlement logic, and IM messaging engines; write high-quality, clean, and maintainable Java code.


• Architecture Optimization & Evolution: Refactor technical debt, optimize JVM performance, database indexing, and caching strategies; resolve data consistency challenges in distributed environments.


• AI Implementation: Participate in the architectural design of AI shopping guide/assistant projects, leveraging Spring AI or related frameworks to integrate LLM capabilities for smart recommendations, automated customer support, and other business scenarios.


• System Stability: Lead core pipeline monitoring and troubleshooting to maintain high system availability during traffic spikes and promotional mega-sales.

#### Requirements

• Technical Background: 3–5 years of Java development experience with solid CS fundamentals; deep understanding of JVM memory models, GC mechanisms, and multi-threading/concurrency programming.


• Framework Proficiency: Proficient in Spring Boot, Spring Cloud, MyBatis, and related mainstream frameworks, with a clear understanding of their core principles and extension points.


• Domain Experience (At least one required):


• Transaction Systems: Familiar with distributed transactions and state machine design; hands-on experience with complex, financial-grade order or settlement systems.


• Messaging & Communication: Proficient in Netty network programming with a deep understanding of WebSocket/MQTT protocols; experience in handling push systems with millions of concurrent connections.


• Middleware & Storage: Proficient in using message queues (RocketMQ/Kafka) for asynchronous decoupling; rich experience in MySQL performance tuning and Redis distributed locks.

#### Preferred Qualifications

• Work Visa Status: Holders of Hong Kong Top Talent Pass Scheme (TTPS) or Quality Migrant Admission Scheme (QMAS) visas—or those eligible to apply—are highly preferred.


• AI Vision: Attentive to AI industry developments; hands-on experience with LangChain, Vector Databases (e.g., Milvus, Pinecone), or RAG architecture is a strong plus.

• Study Growth Fund: We support your professional development and continuous learning.
• Internal Events: Participate in regular team-building activities, workshops, and events designed to promote collaboration and innovation.
• Global Collaboration: Be part of a diverse, international team, working alongside colleagues from around the world.
• Career Advancement: Access opportunities for growth and advancement within a rapidly expanding global company.
• Internal Mobility: Grow with us- Your long-term development is important to us. We offer internal job opportunities to help build your career path.