AI Agent Algorithm Engineer Graduate (Global E-Commerce, Conversational AI) - 2027 Start

TikTok; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

TikTok is building a next-generation unified Agent system for global e-commerce customer service, spanning 30+ languages. As a new graduate, you will own an end-to-end piece from day one and ship it to production, collaborating with an ambitious team to push the frontier of memory, tools, and context in large language models.

Successful candidates will join a fast-growing team, tackle challenging problems, and grow through bold ideas.

Qualifications

• Bachelor's or Master's in CS, AI, math or related quantitative field.
• Strong Python; proficient in C++/Go/Rust/Java.
• Solid ML/NLP fundamentals with hands-on LLM experience.
• Ability to translate research papers into working code.

Responsibilities

• Build and evolve the agent runtime powering customer-service agents.
• Engineer context and memory for long multi-turn agents.
• Post-train and fine-tune LLMs and build data flywheel.
• Design and integrate tools, Skills, and MCP connectors.
• Build evaluation with LLM-as-judge and calibration.
• Develop the self-evolving loop with replay and simulators.
• Own an end-to-end surface across 30+ languages and ship to production.

Skills

Python

C++

Go

Rust

Java

Education

Bachelor's in CS/AI/Math

Master's in CS/AI

Tools

TensorFlow

PyTorch

TensorRT-LLM

Job description

Responsibilities

About the Team

We build the next‑generation unified Agent system for TikTok's global e‑commerce customer service — running in 30+ languages across one of the largest e‑commerce surfaces on the internet. Our north star is a self‑evolving Agent, where post‑training, harness, memory / context engineering, tools, and evaluation form one closed loop, and every served conversation becomes the next iteration's training / eval / retrieval / skill‑induction signal. We build the agent runtime itself — Codex / Claude‑Code‑class — not prompts on top of a vendor API. As a new grad, you'll own a real end‑to‑end piece from day one and ship it to production.

We are looking for talented individuals to join our team. As a graduate, you will get opportunities to pursue bold ideas, tackle complex challenges, and unlock limitless growth.

Successful candidates must be able to commit to an onboarding date by the end of the year. Please state your availability and graduation date clearly in your resume.

Job Responsibilities

• Build and evolve the agent runtime (harness / agent loop) powering our customer‑service agents — orchestrate skills, tools, and context; implement loop control & intervention, progressive disclosure, and behavior‑level guardrails.
• Engineer context & memory for long multi‑turn agents — agentic memory (structured note‑taking), context compaction / summarization, context editing / observation masking, and just‑in‑time (retrieve‑then‑load) retrieval.
• Post‑train and fine‑tune LLMs (SFT / DPO / RL) and build the data flywheel that turns served conversations into training / eval / retrieval signals.
• Design and integrate tools, Skills, and MCP connectors (tools‑as‑APIs), plus skill / tool search for large tool inventories.
• Build evaluation — LLM‑as‑judge with human‑agreement calibration; regression / safety / cost / latency‑aware harnesses; close the offlineonline gap.
• Build the self‑evolving loop — replay + user‑simulator + Auto‑RCA / Auto‑GSB / Auto‑Policy — so the system continuously improves itself.
• Own one high‑leverage end‑to‑end surface and ship it to production across 30+ languages, measured on real business metrics (CSAT, resolution / containment rate).

Qualifications

Minimum Qualifications

• Individuals who are completing or have recently completed a Bachelor's degree or Master's degree in CS / AI / Math or a quantitative field.
• Strong Python plus one of C++ / Go / Rust / Java
• Solid ML / DL / NLP fundamentals, with genuine hands‑on experience with LLMs or agents (coursework, research, internship, competition, open‑source, or a serious side project)
• Able to read a paper or an engineering blog and turn it into working code

Preferred Qualifications

• Have built the runtime, not just called an API — even at research / hobby / competition scale: your own agent loop / harness, a memory / context‑management system, a RAG or tool‑use agent, or a fine‑tuned / post‑trained model
• Hands‑on experience in any one of: post‑training (SFT / DPO / RLHF / RLAIF / RLVR, reward modeling); agent systems (harness, context engineering, MCP / Skills, sub‑agents, tool search); evaluation (LLM‑as‑judge, τ‑bench / SWE‑bench / GAIA / BFCL); inference & serving (vLLM / TensorRT-LLM, MoE, KV / prompt caching); or multilingual NLP — depth in one is enough, breadth welcome

Job Information

About TikTok

TikTok is the leading destination for short‑form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.

Why Join Us

Inspiring creativity is at the core of TikTok's mission. Our innovative product is 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 bring joy - a mission we work towards every day. 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. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. 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

TikTok 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 TikTok, our mission is to inspire creativity and bring joy. 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.