Software Engineer (ecommerce)

Joybuy; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Joybuy is seeking a senior software architect to lead the design and implementation of its international risk control and compliance system, ensuring high performance, concurrency, low latency, high availability, and scalable growth.

You will drive system stability, cost optimization, and continuous improvement, translate complex business scenarios into robust technical solutions, and mentor the team through knowledge sharing and collaborative ownership.

Qualifications

• Bachelor's degree in Computer Science or related field, full-time enrollment preferred.
• Proficient in Java and Spring/MyBatis; strong cross-technology adaptability.
• Deep understanding of distributed architectures and messaging systems (Kafka/RabbitMQ).
• Familiar with AI agent frameworks and large AI model applications, incl. LLMs, prompt engineering, memory management, RAG, knowledge graphs, SFT.

Responsibilities

• Lead the technical architecture design and implementation of risk control and compliance systems.
• Drive system stability initiatives and cost optimization with continuous improvement.
• Develop understanding of business scenarios, contribute to technical solution design, and resolve complex challenges.
• Collaborate to elevate technical capabilities through knowledge sharing and exchange.
• Track technologies and emerging trends; provide technical support for business innovation.

Skills

Java

Spring

MyBatis

Distributed architecture

Kafka

RabbitMQ

Redis

Memcached

AI frameworks

LLMs

Prompt engineering

Memory management

RAG

Knowledge graphs

SFT

Education

Bachelor's degree in Computer Science

Tools

Kafka

RabbitMQ

Redis

Memcached

Job description

• Lead the technical architecture design and implementation of the international e-commerce risk control and compliance system, ensuring high performance, high concurrency, low latency, high availability, and strong scalability.
• Drive system stability initiatives and cost optimization, with continuous improvement and iterative enhancement of existing systems.
• Develop a deep understanding of business scenarios, contribute to technical solution design, and resolve complex technical challenges.
• Collaborate closely with the team to elevate overall technical capabilities through knowledge sharing and technical exchange, jointly driving business growth.
• Track technological developments and emerging trends in the software industry, explore practical applications of new technologies, and provide technical support for business innovation.

Qualifications:

• Bachelor's degree or above via nationally accredited full-time enrollment, preferably in Computer Science or a related field; experience in building risk control and compliance systems is a plus.
• Proficient in Java; well-versed in mainstream frameworks such as Spring and MyBatis, with strong cross-technology adaptability. Deep understanding of distributed architecture (SOA/microservices), message queues (Kafka/RabbitMQ), and caching systems (Redis/Memcached).
• Familiar with mainstream AI Agent development frameworks and genuinely curious about large AI model applications. Candidates with hands-on experience in LLMs, prompt engineering, memory management, RAG, knowledge graphs, and SFT are strongly preferred.
• Possesses a strong sense of professionalism and ownership, a proactive work ethic, independent analytical and problem-solving skills, high self-motivation, resilience under pressure, and a collaborative team spirit.
• Aligned with JD.com's core values: Customer First, Innovation, Relentless Effort, Accountability, Gratitude, and Integrity.