How a JD Architect Turns PaaS Challenges into Career Growth

Li Zunjing, an architect in JD.com’s Technology and Data Center Trading R&D department, has spent his career on the front lines of development, earning multiple internal awards such as the Cadillac Car Award and the 2020 JD Retail Technical Star.

Two‑Stage Career at JD.com

From 2014 to 2016, his primary mission was ensuring the stability and high availability of JD’s e‑commerce systems. The team often worked late into the night, with some members even staying overnight at the office to handle critical incidents.

Since 2017, the focus shifted to supporting rapid business growth, exploring new business lines, and enabling technology commercialization. This second stage emphasizes responsibility, especially in the ongoing push toward PaaS (Platform as a Service) adoption.

Driving B‑PaaS Innovation

Li took charge of the B‑PaaS initiative, addressing architectural bottlenecks, upgrading development philosophies, and tackling external enablement challenges. He helped define a new architecture foundation, refined the theoretical framework, and established a universal version specification. The resulting methodology and best practices have been adopted across multiple secondary R&D units, shortening internal delivery cycles and reducing development costs for external commercial projects.

Collaboration was a key factor: teams actively identified and solved problems together, turning the B‑PaaS universal version into a shared success.

Maintaining an "Empty‑Cup" Mindset

Li stresses continuous self‑improvement. Early in his JD tenure, he focused on mastering core technologies through hands‑on coding, especially high‑availability trading systems. As his expertise grew, he shifted from pure skill development to business‑oriented service, sharing knowledge with other teams, gathering feedback, and iterating on the platform.

Even after contributing core code, he welcomes peer suggestions and treats every piece of code as improvable, embodying a humble, learning‑first attitude.

Advice for Newcomers and Self‑Driven Growth

Li advises fresh graduates and early‑career engineers to solidify fundamentals—master mainstream languages, understand data structures and algorithms, and grasp networking basics. After building a solid base, they should apply skills in real projects, consider code, people, and machines together, and pursue purposeful learning.

Beyond tactics, self‑drive is essential: genuine interest, willingness to take on extra tasks, and the courage to experiment with new technologies accelerate growth. He observes that the most successful engineers are those who proactively seek challenges rather than waiting for guidance.

Honors as Responsibility

While Li has received many honors, he views them as a call to greater responsibility. Awards motivate reflection on past shortcomings and reinforce his commitment to deliver the next project with higher standards.

Overall, his story illustrates how technical depth, collaborative spirit, continuous learning, and a sense of duty combine to create lasting value for both individuals and the organization.