Senior Java Systems Architect for Global Backend

Joybuy; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

JD is seeking a senior backend architect in London to lead technical decisions and shape international core systems. You will design scalable architectures, guide productization efforts, and implement robust backend services using Java and Spring Boot.

You will mentor engineers, improve performance, and ensure high availability across global infrastructure. Strong English and Chinese communication are required.

Qualifications

• Bachelor’s degree in Engineering, Computer Science, Mathematics, or a related technical field.
• 5+ years of backend development experience with Java and JVM fundamentals.
• Strong server-side architecture skills with MySQL, Redis, Kafka in high-availability, high-concurrency environments.
• Excellent coding standards and a passion for technology and open‑source learning.
• Strong analytical, problem‑solving, and learning abilities with a proactive mindset.
• Demonstrated team leadership experience and effective communication skills in both Chinese and English.

Responsibilities

• Lead technical decision-making and architecture design for JD’s international core systems, ensuring high standards of performance, availability, concurrency, security, and scalability.
• Design and oversee complex system architectures and drive productization efforts, maintaining architectural quality through hands-on coding, continuous performance evaluation, and system optimization.
• Architect and develop backend services using Java and Spring Boot, establishing engineering best practices and reusable technical frameworks.
• Build and maintain backend systems for JD’s operation centres, ensuring seamless integration across global infrastructure.
• Identify, assess, and mitigate technical risks throughout project implementation, covering monitorability, maintainability, grey release strategies, and rollback capabilities.
• Research, evaluate, and promote new technologies and methodologies, identifying integration opportunities within global architectures to strengthen the team’s technical capability and architectural foresight.
• Provide technical leadership, mentor engineers, and continuously optimize team collaboration and engineering best practices.
• Work onsite in London, UK.

Skills

Java backend development

JVM fundamentals

Concurrency & multithreading

Performance tuning

Server-side architecture

Middleware (MySQL, Redis, Kafka)

Distributed systems high-availability

Code quality / open-source learning

Analytical problem solving

Bilingual Chinese/English

Education

Bachelor's degree in Engineering, Computer Science, Mathematics, or related field

Tools

MySQL

Redis

Kafka

Job description

JD is seeking a senior backend architect in London to lead technical decisions and shape international core systems. You will design scalable architectures, guide productization efforts, and implement robust backend services using Java and Spring Boot.

You will mentor engineers, improve performance, and ensure high availability across global infrastructure. Strong English and Chinese communication are required.