Senior Search Engineer

Location: Tokyo - Remote

Are you looking

• To make meaningful changes at the fastest-growing tech company in Japan?
• For a fair, highly flexible, inclusive working environment where anyone, regardless of their background, can make an impact?
• To build the next bold idea in customer acquisition and revenue growth through conversational commerce technology?
• For a place where things are not just fast - but they happen now?

About Us

We are “Designing conversations. Driving conversions.”

Our automated chat solution and conversational technology change how consumers purchase or act online. We convert customers who appear "unengaged" to become "valuable" through designed chat on Messaging Apps. Using AI-powered, human-designed conversation flows across chat platforms enables brands to build personalized, automated conversations with their consumers and develop a deeper understanding of their preferences while creating a delightful, seamless shopping experience.

The goal is simple: to “revolutionize hospitality on the Internet” by unlocking digital customer service experiences that were limited to physical stores previously.

As our Senior Search Engineer

As a Senior Search Engineer, you will be an integral part of our engineering team, focused on building and optimizing search solutions that power our conversational commerce platform. You will design and implement search algorithms that improve the relevance, accuracy, and speed of our chat interactions, ensuring users get the best possible experience. You will collaborate closely with product, data science, and engineering teams to build scalable, efficient search systems that handle massive volumes of data while delivering lightning-fast results. We’re looking for someone with at least 5 years of experience in search technology.

Your Typical Day With Us

• Designing, developing, and optimizing search algorithms and infrastructure using technologies like Elasticsearch, Solr, or Lucene.
• Integrating AI-powered models and machine learning to improve search relevance, speed, and accuracy.
• Collaborating with data science teams to implement NLP techniques and machine learning for semantic search enhancements.
• Building and maintaining high-performance indexing, ranking, and query processing systems to ensure the quality and relevance of search results.
• Tuning relevance metrics based on real-world data and continuously monitoring performance across various datasets and use cases.
• Mentoring junior engineers, conducting code reviews, and participating in an on-call rotation with additional compensation.

What You’ll Need

• 5+ years of experience as a search engineer or in a directly related role, with a strong background in search algorithms, information retrieval, and ranking systems.
• Expertise in search technologies like Elasticsearch, Solr, or Lucene—experience designing search systems is a must.
• Proficiency in Python and/or Java for backend systems development.
• Strong experience with machine learning models and natural language processing to enhance search capabilities.
• Proven ability to optimize query parsing, indexing, and relevance tuning for search systems.
• Experience working with AI and ML models, preferably with tools like TensorFlow or PyTorch.
• Ability to collaborate effectively across teams and communicate complex search concepts clearly.
• English proficiency is required. Conversational Japanese is a plus.

What Makes You Stand Out

• Japanese language proficiency at a business or native level, allowing you to liaise with our primarily Japan-based users.
• Knowledge of cultural differences and how they impact user behavior in search contexts.
• Experience working with chatbot search systems, AI-driven search, or in SaaS environments.

Our Tech Stack

• Backend Languages: Go, Python, Elixir
• Frontend Languages: HTML, CSS, JavaScript (TypeScript, React.js, etc.)
• Infrastructure: Google Cloud Platform, GCP Pub/Sub, Kubernetes, MongoDB, MySQL, Postgres, BigQuery, Elasticsearch
• Other Tools: GitHub, Slack, Jira, Confluence

Benefits

• Competitive salary (performance review every 6 months)
• 10 days paid holidays during the first year, weekends off, national holidays, summer and winter break.
• Visa support for the right candidates.
• Education support for platforms like Udemy and Frontend Masters.
• Highly flexible, remote-first international organization.
• Club activity allowance and shuffle lunch allowance.

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