Senior Software Engineer - Search & Vector Database Infrastructure

ByteDance; Seattle (WA); On-site; USD 140,000 - 210,000; Full time

Job summary

ByteDance is seeking engineers to advance our fully managed search and vector retrieval platforms. You will contribute to high-performant full-text and vector search, hybrid search, and scalable indexing across distributed systems.

You will work with Elasticsearch/OpenSearch and Milvus in production, collaborating with a global team to push open-source projects forward while delivering enterprise-grade cloud search services on Volcano Engine.

Qualifications

• Minimum Qualifications- B.S in Computer Science, AI, Machine Learning, or a related field.
• Strong software engineering skills in C++, Golang, Java, or Python.
• Experience with search engines, databases, storage systems, or distributed systems.
• Hands-on experience with Elasticsearch/OpenSearch or Milvus in production or system development.
• Preferred Qualifications- Deep experience with Elasticsearch/OpenSearch, Lucene, Milvus/Knowhere, or similar systems.
• Strong knowledge of full-text search and (multi)-vector indexing, including HNSW, IVF, DiskANN, or related ANN algorithms.
• 5 years experience optimizing billion-scale or larger vector retrieval for latency, throughput, recall, and cost.
• 5 years experience with cloud-native storage, compute-storage separation, object storage, or lakehouse/lakebase architectures.

Responsibilities

• Develop and evolve our Elasticsearch/OpenSearch and Milvus products, building high-performance and scalable search and vector retrieval capabilities.
• Develop high-performance full-text and vector search, including hybrid search, filtered search, multi-vector search, and large-scale ANN retrieval.
• Optimize vector indexing and distributed retrieval across HNSW, IVF, DiskANN, RaBitQ, storage, caching, and I/O.
• Explore cloud-native Vector Lakebase architectures for scalable search over data lakes and object storage.

Skills

C++

Golang

Java

Python

Distributed systems

Search engines

Education

B.S in Computer Science, AI, Machine Learning, or a related field

Tools

Elasticsearch/OpenSearch

Milvus

Job description

Join us as we work together to inspire creativity and enrich life around the globe.

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Location:

Seattle

Team:

Technology

Employment Type:

Regular

Job Code:

A126912B

Responsibilities

• Develop and evolve our Elasticsearch/OpenSearch and Milvus products, building high-performance and scalable search and vector retrieval capabilities.
• Develop high-performance full-text and vector search, including hybrid search, filtered search, multi-vector search, and large-scale ANN retrieval.
• Optimize vector indexing and distributed retrieval across HNSW, IVF, DiskANN, RaBitQ, storage, caching, and I/O.
• Explore cloud-native Vector Lakebase architectures for scalable search over data lakes and object storage.

About the Team:

The Search team is dedicated to building a fully managed, one-stop platform for information retrieval and analytics. Deeply compatible with Elasticsearch, OpenSearch, and Milvus, the platform serves four core scenarios—GenAI applications, search, security, and observability and provides comprehensive capabilities across full-text search, vector search, geospatial search, and hybrid search. We are also building next-generation Agentic Search products, including RAG, AI-powered search, and multimodal retrieval, continuously pushing the boundaries of intelligent search technology. We are deeply involved in the open-source ecosystem and have contributed hundreds of PRs across the OpenSearch, Elasticsearch, Lucene, and Milvus communities. Several members of our team hold key leadership roles in these communities, including Governing Board Member, Technical Steering Committee Member, PMC Member, and Maintainer, helping shape the evolution of the broader search and database ecosystem through sustained technical contributions. On the business side, we not only provide reliable infrastructure for some of ByteDance’s largest-scale vector and full-text hybrid search workloads, but also deliver enterprise-grade cloud search services to external customers through Volcano Engine, helping businesses unlock growth through data. We embrace a pragmatic yet ambitious engineering culture: while continuously publishing innovative research at top-tier conferences such as VLDB and ICDE, we remain strongly focused on real-world impact and commercial adoption, building a comprehensive product portfolio that serves a wide range of search and AI use cases. Our team brings together leading database researchers and exceptional engineers from around the world. We are looking for talented individuals with expertise in search or vector database engine development, distributed systems architecture, or AI model innovation to join us. Together, we will explore uncharted technical territory, define the data foundation for the AI era, and empower both ByteDance and enterprises across industries to achieve AI-driven transformation.

Qualifications

• Minimum Qualifications- B.S in Computer Science, AI, Machine Learning, or a related field.
• Strong software engineering skills in C++, Golang, Java, or Python.
• Experience with search engines, databases, storage systems, or distributed systems.
• Hands-on experience with Elasticsearch/OpenSearch or Milvus in production or system development.
• Strong understanding of distributed systems and performance optimization.

• Preferred Qualifications- Deep experience with Elasticsearch/OpenSearch, Lucene, Milvus/Knowhere, or similar systems.
• Strong knowledge of full-text search and (multi)-vector indexing, including HNSW, IVF, DiskANN, or related ANN algorithms.
• 5 years experience optimizing billion-scale or larger vector retrieval for latency, throughput, recall, and cost.
• 5 years experience with cloud-native storage, compute-storage separation, object storage, or lakehouse/lakebase architectures.

Job Information

About Us

Founded in 2012, ByteDance's mission is to inspire creativity and enrich life. With a suite of more than a dozen products, including TikTok, Lemon8, CapCut and Pico as well as platforms specific to the China market, including Toutiao, Douyin, and Xigua, ByteDance has made it easier and more fun for people to connect with, consume, and create content.

Why Join ByteDance

Inspiring creativity is at the core of ByteDance's mission. Our innovative products are built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and enrich life - a mission we work towards every day.

As ByteDancers, we strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our Company, and our users. When we create and grow together, the possibilities are limitless. Join us.

Diversity & Inclusion

ByteDance is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At ByteDance, our mission is to inspire creativity and enrich life. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.

Reasonable Accommodation

ByteDance is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at https://tinyurl.com/RA-request