(Principal) Backend Development Engineer

Job description

About Us 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. Role Overview Develop and maintain the backend capabilities of the Reach Platform across push notifications, SMS, email, and other messaging channels. Work closely with Compliance, Security, Product, Frontend, QA, and third-party providers to support message delivery across the company's global sites. Responsibilities • Develop the Reach Platform backend and its core capabilities across push notifications, SMS, email, WhatsApp, and other messaging channels. Own architecture design, feature development, performance optimization, reliability, and day-to-day operations for the delivery chain. • Build unified, reliable, efficient, and scalable messaging infrastructure for multiple sites and business lines. Core capabilities include message intake, task scheduling, user routing, channel selection, provider management, frequency limits and safeguards against erroneous sends, priority scheduling, delivery status callbacks, reporting, and effectiveness analysis. Ensure timely and reliable delivery at high volume and under high concurrency. • Improve platform reliability and observability through monitoring, alerts, logs, distributed tracing, and service level objectives (SLOs). Improve the speed of incident detection, diagnosis, and recovery. Plan capacity, run load tests, and optimize the system for large-scale campaigns, traffic spikes, and operational activities. • Collaborate with Product, Frontend, client engineering, QA, Data, Compliance, Security, Procurement, and third-party providers. Deliver compliant messaging capabilities across countries and regions, supporting marketing campaigns, trading alerts, security notifications, one-time passwords (OTPs), and system notifications. Provide stable, efficient, secure, and measurable messaging services for users worldwide. Requirements <h4 class="hea