Full Stack Engineer — AI Commerce Platform

JD.COM; Hong Kong; On-site; HKD 548,159 - 783,085; Full time

Benefits offered by this job

Competitive salary

Learning opportunities

People-first culture

Job summary

JD.COM is seeking a skilled full-stack developer to design AI models and implement low-latency decision systems in Hong Kong. You will work with a collaborative team to create impactful solutions in a dynamic environment.

Ideal candidates should have 3+ years of full-stack development experience, mastering Go or Python for backend and Next.js/React for frontend. Strong knowledge of AI routing mechanisms and pricing models is essential.

Qualifications

• 3+ years of full-stack development experience with expertise in at least two cognitive dimensions related to AI.
• Proficient in Go or Python for backend development and Next.js/React for frontend.
• Experience in low-latency decision systems.

Responsibilities

• Design and implement multi-strategy AI model routing engine for optimal request matching.
• Build multi-level pricing and billing engine for AI capabilities.
• Deploy and optimize microservices architecture.

Skills

Full-stack development

AI model knowledge

Low-latency decision systems

Go or Python and Next.js/React

SaaS billing/subscription/payment integration

Tools

Redis

PostgreSQL

Job description

Who We Are

At JD.com, also known as JINGDONG, we are building one of the world’s most trusted technology and supply chain ecosystems. What started as a bold idea in China has evolved into a NASDAQ‑listed, Fortune 44 global enterprise serving over 700 million active customers. Powered by advanced logistics, innovative technology, and a commitment to integrity, JD.com operates across retail, logistics, technology, property and more, creating solutions that make everyday life smarter, faster, and more connected.

Our Global Reach

JD.com is expanding its international footprint through a digitally intelligent, cross‑border supply chain and world‑class logistics network, supported by platforms such as Joybuy, which brings trusted products to customers worldwide. Today, our teams operate across China, the U.S., U.K., Netherlands, France, Germany, Spain, Brazil, Hungary, Japan, South Korea, Australia, Thailand, Vietnam, Malaysia, Indonesia, Saudi Arabia, the UAE and beyond, reaching customers in every corner of the world.

What We Offer

Joining JD.com means becoming part of a company where people, innovation, and impact go hand in hand. We offer a competitive salary, a great location, and a supportive, people‑first culture where your growth truly matters. With access to global projects, learning opportunities, and an inclusive environment that values every voice, you’ll have the space to shape the future with us.

About The Team

You’ll be joining the JD.com team, which values collaboration, ownership, and a commitment to delivering high‑quality results in a fast‑paced, dynamic environment.

核心职责

• AI模型智能路由决策系统：设计并实现多策略AI模型路由引擎，实现请求到模型的最优匹配，保证低延迟决策，并确保路由决策透明可审计。
• AI算力商品化与计费系统：构建多层级算力定价与计费引擎，实现精细化成本核算与防套利机制。
• 基础设施与可靠性：微服务架构部署与优化、缓存与熔断机制设计、数据库事务保障、高可用架构与故障自动切换。
• AI模型能力评测与价格数据管道：主流AI模型能力评测数据整合 + 平台用户反馈聚合 + 实时价格缓存与同步。
• 性能工程：冷启动优化 + 压测验证 + 在线学习与实时统计。

硬性要求

• 3年+全栈开发经验，具备以下三个认知维度中的至少两个：
  • AI模型认知：深入理解主流LLM模型的能力边界、成本结构、API协议（OpenAI/Anthropic/Google/国产模型），对模型选型和性价比评估有实战经验。
  • AI模型聚合认知：理解多模型聚合架构（API Gateway/Proxy/Router模式），对模型路由、负载均衡、故障转移、成本优化有工程经验或深度认知。
  • AI智能路由/Commerce认知：有智能决策系统（推荐/路由/调度/竞价/计费）开发经验，理解“算力商品化”——将AI推理能力从技术接口转化为可定价、可订阅、可审计的商业产品。
• 精通Go或Python后端 + Next.js/React前端，能独立完成从API设计→前端实现→部署上线的全链路。
• 有低延迟决策系统经验（推荐/路由/调度/竞价）。
• 精通Redis + PostgreSQL，理解在线学习/实时统计等算法。
• 有SaaS计费/订阅/支付系统集成相关经验。
• 有云原生/容器化部署与运维经验。

加分项

• 有AI模型路由/模型调度/算力调度相关经验。
• 有推荐系统/广告引擎/电商交易系统经验——路由决策和成本优化的 transferable 技能。
• 有多模型API网关/LLM Proxy开发经验（开源或商业产品均可）。
• 有 Multi‑Armed Bandit/A/B 测试框架设计经验。
• 有电商/支付/计费系统经验。
• 有 SLA 99.9%+ 系统运维经验。
• 开源项目贡献者（GitHub 500+ stars 项目）。

At JD.com, we’re committed to building a diverse and inclusive workplace where everyone can thrive. We’re proud to be an equal opportunity employer and make all employment decisions without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, disability, age, veteran status, or any other protected characteristic.