Web3 Developer Senior Jobs in South Korea

Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatched portfolio of digital-asset products. Binance offerings range from trading and finance to education, research, payments, institutional services, Web3 features, and more. We leverage the power of digital assets and blockchain to build an inclusive financial ecosystem to advance the freedom of money and improve financial access for people around the world.We are seeking an experienced Software Engineer to lead the development of scalable, high-performance backend services, with a focus on building and optimizing both traditional search and AI-powered search capabilities. You will collaborate with cross-functional teams to develop robust search systems that support core business use cases. This role requires strong backend expertise and a commitment to delivering reliable, efficient solutions that drive Binance’s operational excellence.

Responsibilities

• Design, build, and optimize scalable backend services supporting both traditional search and AI-powered search systems.
• Own the architecture of search-related systems to ensure high reliability, performance, and scalability.
• Develop reusable backend frameworks and infrastructure to accelerate search and AI product development.
• Collaborate closely with data scientists and AI engineers to enable LLM-powered search, ranking, and agent capabilities.
• Continuously improve search performance, including indexing, retrieval, ranking, and latency optimization.
• Translate business needs into scalable search solutions.
• Drive execution and deliver results in complex or evolving environments.

Requirements

• 5+ years of backend engineering experience.
• Strong proficiency in Java and Python.
• Experience designing and building large-scale distributed systems.
• Hands-on experience with search technologies (e.g., Elasticsearch, vector search, hybrid retrieval) is preferred.
• Experience with big data processing frameworks such as Flink or Spark for real-time or batch data processing.
• Familiarity with AI-powered search technologies, including LLM-based search, RAG architectures, or agent frameworks (e.g., Dify, LangChain, Mastra, OpenAI Agents SDK).
• Familiarity with cloud infrastructure and scalable system design.
• Ability to deliver results in environments with ambiguity or evolving requirements.

Why Binance• Shape the future with the world’s leading blockchain ecosystem• Collaborate with world-class talent in a user-centric global organization with a flat structure• Tackle unique, fast-paced projects with autonomy in an innovative environment• Thrive in a results-driven workplace with opportunities for career growth and continuous learning• Competitive salary and company benefits• Work-from-home arrangement (the arrangement may vary depending on the work nature of the business team)Binance is committed to being an equal opportunity employer. We believe that having a diverse workforce is fundamental to our success.By submitting a job application, you confirm that you have read and agree to our Candidate Privacy Notice.We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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