About Lineate
Lineate is a US-based international software development company with over two decades of experience.
From Intelligent Document Processing(IDP) and Agentic RAG systems to scalable cloud architectures, we turn complex ideas into real, measurable results.
We deliver AI-driven custom solutions for FinTech, HealthTech, AdTech, and beyond, empowering businesses to grow smarter, faster, and more efficiently.
Our expertise falls into three main categories:
- Building Custom AI Solutions: Deploying high-impact, AI-enabled technology utilizing IDP, Agentic RAG.
- Cloud and Data Infrastructure: Optimizing business operations with our data management and cloud computing solutions.
- Team Augmentation: Providing specialized experts in FinTech, AdTech, and HealthTech to integrate seamlessly and accelerate project timelines.
- Our goal is not just to build technology, but to build the future operating model for our clients.
About the Role
Senior Java Search Engineer who will primarily work on backend development with a strong focus on optimizing full-text and vector search capabilities. The role also involves supporting AI/ML-powered products by integrating and operationalizing AI components within production systems rather than developing ML models from scratch.
Must-have qualifications:
- 5+ years of hands-on software engineering experience with Java in production environments
- Strong expertise in Java 25+, Spring Framework / Spring Boot, and modern backend development practices
- Experience building and optimizing high-performance search systems and search-related services
- Hands-on experience with vector search technologies, preferably Vespa, or other vector databases/search platforms (OpenSearch, Elasticsearch, Weaviate, Pinecone, Milvus, Qdrant, etc.)
- Solid experience with Redis, MySQL, and Apache Kafka
- Experience working with reactive programming, preferably RxJava
- Strong understanding of distributed systems, scalability, performance tuning, and reliability
- Experience designing and implementing APIs and microservices
- Good knowledge of software architecture, testing, and engineering best practices
Nice-to-have qualifications:
- Production experience with Vespa
- Experience building semantic search, vector search, or Retrieval-Augmented Generation (RAG) solutions
- Familiarity with AI/ML infrastructure and pipelines, including integrating machine learning models into production services
- Experience orchestrating AI-powered services and working with embeddings, ranking, and recommendation systems
- Knowledge of cloud platforms and containerized environments (Docker, Kubernetes)
- Experience with observability, monitoring, and performance analysis tools
Key responsibilities:
- Developing and optimizing large-scale search functionality with a strong focus on full-text and vector search performance
- Building backend services using Java, Spring, and reactive technologies
- Designing and improving search relevance, ranking, indexing, and retrieval mechanisms
- Integrating AI/ML components into production systems and supporting AI-driven product features
- Building and maintaining reliable data pipelines and event-driven services using Kafka
- Collaborating with product, data, and engineering teams to deliver scalable search and discovery solutions
Working hours:
Candidates must be available to overlap with the New York team from 9:00 AM to 1:00 PM ET. The remaining working hours are flexible.
Tech stack:
Java 25+, Spring Boot, RxJava, Redis, Vespa, MySQL, Kafka, Vector Search Technologies, AI/ML Infrastructure.
We offer:
- B2B contract with Lineate LLC (US)
Lineate is proud to be an Equal Opportunity Employer - We do not hire on the basis of race, colour, religion, creed, gender, national origin, citizenship, age, disability, veteran status, marital status, pregnancy, parental status, sex, gender expression or identity, sexual orientation, or any other basis protected by Georgian legislation. All employment is decided based on qualifications, merit, and business need.
Learn more about Lineate at our website: www.lineate.com
Skills Required
- Strong hands-on experience with both Java and Python
- Solid understanding of backend development principles and system design
- Experience working with APIs, microservices, and distributed systems
- Ability to work with data structures, algorithms, and performance optimization
What We Do
Lineate is a leading implementer of cloud solutions, helping AdTech and MarTech organizations scale their technology to manage vast data volumes. Our expertise in AdTech and MarTech along with our unique culture focused on knowledge breadth and creativity sets us apart in a competitive industry. With a global presence spanning seven countries, our client base is primarily in the United States and Western Europe. Why do our customers enjoy working with us? • Lineate is the market leader in developing custom software solutions for every kind of problem in the AdTech world • We are data obsessed problem solvers • We develop software that blows away the users of today... and delights the users of tomorrow • We believe in providing our engineers the freedom to develop performance and scalable software • We flourish in the complex, impossible and the “there is no way you can build that” software projects, it's our happy place Our AdTech Services: • Identity - Consent Management, Identity Graphs, Contextual Targeting • Optimization - Managing Publisher Yield and Optimizing Advertiser Performance • Insights - Real Time Reporting and Data Visualization • Data, Privacy & Security - Unification of Data Sources, Data Governance and Privacy, Risk Assessment and Fraud Detection • Cloud - Hybrid Cloud Solutions and Cloud Scalability
