Lead Backend Development Engineer

About the company

Bybit is a major cryptocurrency exchange that is building MyBank, a retail-banking service meant to blend crypto trading with traditional financial services.

About this role

<div class="content-intro"><p><strong>About Us</strong></p> <div data-page-id="HladdPLXIoNz4nxkqkCuk4rAs8v" data-lark-html-role="root" data-docx-has-block-data="false"> <div class="ace-line ace-line old-record-id-XCikdRR2xoZIjdxtCKcuOflrs8d">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.</div> <div class="ace-line ace-line old-record-id-IF06dI0MPoBwYfxbZ4zui13HsoC">&nbsp;</div> <div class="ace-line ace-line old-record-id-X5EbdOwvMoYuOmxQBbuueUEDsDd">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.</div> <div class="ace-line ace-line old-record-id-LtVud2dO7oglqJxxZoOucqjJsPc">&nbsp;</div> <div class="ace-line ace-line old-record-id-RMHkdm4bPo66l3xMVO8ui1o8sle">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.</div> </div></div><div data-lark-html-role="root"> <div data-page-id="FIQedwGBoog6mAxpMiDun5jssLO" data-lark-html-role="root" data-docx-has-block-data="false"> <h4 class="heading-4 ace-line old-record-id-IXfBdCa28ooOrexLJFjuKIP4s5g"><strong>Job Overview</strong></h4> <div class="ace-line ace-line old-record-id-W0XFdBPIEoElJFxOLk8u9EptsDh">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.</div> <div class="ace-line ace-line old-record-id-WQGYdHFi6oMm7Rx0a0Vu2HYNsrb">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.</div> <h4 class="heading-4 ace-line old-record-id-HvvWd16W3oorxlxr4bpu00crshb"><strong>Key Responsibilities</strong></h4> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-M79Pd5L4ZovN0NxmIyAuslg8sMg" data-list="bullet"> <div><strong>Core Java Development:</strong> Design and build high-concurrency order processing centers, payment &amp; settlement logic, and IM messaging engines; write high-quality, clean, and maintainable Java code.</div> </li> <li class="ace-line ace-line old-record-id-Cpu6dI3QRopYGMx1aO4uIPSgsbd" data-list="bullet"> <div><strong>Architecture</strong><strong> Optimization &amp; Evolution:</strong> Refactor technical debt, optimize JVM performance, database indexing, and caching strategies; resolve data consistency challenges in distributed environments.</div> </li> <li class="ace-line ace-line old-record-id-UaQddKFXcoMLYmx0Pznu2OPNsEd" data-list="bullet"> <div><strong>AI Implementation:</strong> 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.</div> </li> <li class="ace-line ace-line old-record-id-MMBVd0Miloy7b2xjNWvucWZcsfd" data-list="bullet"> <div><strong>System Stability:</strong> Lead core pipeline monitoring and troubleshooting to maintain high system availability during traffic spikes and promotional mega-sales.</div> </li> </ul> <h4 class="heading-4 ace-line old-record-id-Sl2fdgOY5oLzgoxT1JRuFYaGsGT"><strong>Requirements</strong></h4> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-IDH0dHtWyolcF8xY4Kwu9dGmsTd" data-list="bullet"> <div><strong>Technical Background:</strong> 3–5 years of Java development experience with solid CS fundamentals; deep understanding of JVM memory models, GC mechanisms, and multi-threading/concurrency programming.</div> </li> <li class="ace-line ace-line old-record-id-G9bgdqC5noatuCxUkiju1Gq7sRf" data-list="bullet"> <div><strong>Framework Proficiency:</strong> Proficient in Spring Boot, Spring Cloud, MyBatis, and related mainstream frameworks, with a clear understanding of their core principles and extension points.</div> </li> <li class="ace-line ace-line old-record-id-PMkydYoPoopZxPx89ZvuzBmusKh" data-list="bullet"> <div><strong>Domain Experience (At least one required):</strong></div> <ul class="list-bullet2"> <li class="ace-line ace-line old-record-id-L8FqdR8Bwoea7Vx2qZCucYNKsgg" data-list="bullet"> <div><em>Transaction Systems:</em> Familiar with distributed transactions and state machine design; hands-on experience with complex, financial-grade order or settlement systems.</div> </li> <li class="ace-line ace-line old-record-id-B3HSd5KduoE4AKxbUDWuAn1msOd" data-list="bullet"> <div><em>Messaging &amp; Communication:</em> Proficient in Netty network programming with a deep understanding of WebSocket/MQTT protocols; experience in handling push systems with millions of concurrent connections.</div> </li> </ul> </li> <li class="ace-line ace-line old-record-id-HVTOdsCtKouEJsxDo8au7PqksPf" data-list="bullet"> <div><strong>Middleware &amp; Storage:</strong> Proficient in using message queues (RocketMQ/Kafka) for asynchronous decoupling; rich experience in MySQL performance tuning and Redis distributed locks.</div> </li