AI Machine Learning Engineer (Lemon8), Singapore

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.

About the team

Our Search Team is responsible for building and owning our search engine which provides our users the best search experience. In our Search Team, you'll have the opportunity to build a full-stack search engine system and combine information retrieval technology with modern machine learning methods from related fields such as NLP, Computer Vision, Multimodal, and Recommender Systems. We embrace a culture of self-direction, intellectual curiosity, openness, and problem-solving.

Responsible for the Search Top-1 Card and AI Assistant features in Lemon8 product. Leverage in-platform content and users historical conversations as contextual inputs to deliver a personalized, highly authentic tool-based product through conversational interaction.In the conversational search paradigm, accurately identify user intent by combining real-time dialogue context and historical chat memory. Integrate high-quality in-platform UGC content with authoritative global knowledge to generate authentic, traceable AI-powered results.

Core Responsibilities:

1. End-to-End AI Agent System Construction: Lead the full lifecycle delivery of AI Agent applications, from offline MVP prototyping to production-grade closed-loop systems. Own the design and implementation of foundational data pipelines, core workflow architectures, service execution layers, and observability frameworks to ensure system scalability, stability, and performance.

2. Business Outcome-Driven Engineering Iteration: Drive algorithmic and strategic optimizations aligned with business objectives. Oversee core business pipeline launches and iterations via offline batch runs, A/B testing, and online canary deployments, continuously improving user experience, system efficiency, and key business metrics.

3. Quality Assurance & Evaluation System Establishment: Build end-to-end quality validation mechanisms covering data processing, reasoning, and generation. Develop offline evaluation frameworks, bad case taxonomies, and automated assessment pipelines to guarantee the accuracy, consistency, and compliance of business outputs.

4. Intelligent Capability Evolution & Cross-Scenario Expansion: Own the iteration and optimization of core intelligent capabilities including multi-step reasoning, RAG, and personalized memory systems. Drive the reuse and deployment of Agent technologies across vertical business scenarios to support long-term intelligent business upgrades.

Minimum Qualifications

1. Bachelor's degree or above in a computer-related major, with excellent coding ability and proficient in programming languages such as C++/Python, and familiar with common data structures and programming algorithms.

2. Proficient in C++/Python strong command of algorithms and data structures (e.g., retrieval, graph algorithms).

3. Basic understanding of LLM fundamentals (e.g., prompt engineering, fine-tuning workflows).

4. Strong problem-solving skills with a track record of delivering technical projects.

Preferred Qualifications

1. Hands-on experience with LLM/Agent technologies: RAG optimization, RLHF/SFT for LLMs, or Agent framework development (e.g., planning/memory modules).

2. Excellent communication and collaboration skills, with a track record of exploring new technologies and driving technical advancements with teams.