What the ‘Big Mud Ball’ Teaches About Modern Software Architecture

Introduction

Inspired by the book Architecture Modernization , this article reflects on software architecture design from the perspective of “architectural resonance”. It systematically analyzes common problems and mitigation strategies across eight themes, emphasizing that successful modernization depends not only on technology but also on team trust and engineering excellence.

Big Mud Ball

Without proper structural design, code inevitably becomes a tangled “big mud ball”. Legacy and unused code increase cognitive load, and duplicated implementations double effort. A framework that isolates change and supports “metabolism”—removing, consolidating, and standardizing code—acts like an immune system resisting entropy.

Independent Value

Independent value streams mean teams own and decide on their products, similar to “household responsibility”. However, in complex organizations, overlapping platforms and shared services blur accountability, making it hard to determine who ultimately owns a product.

Domain Division

Dividing a problem domain into sub‑domains clarifies boundaries and enables collaborative development. Effective domain division starts from user interaction cases, extracts events and results, defines required capabilities, and then establishes clear boundaries.

Concept Design

Concept design is about aligning consensus across teams. Achieving shared understanding is difficult, especially when many teams are involved; it requires exposing conflicts, probing motivations, and converging on a common view.

Classification Perspective

Design is essentially classification. While classification helps map abstract concepts to concrete implementations, multiple classification dimensions can cause overlap and ambiguity, making it challenging to find orthogonal, complete partitions.

Domain Thickness

Different domains have varying “thickness” based on the number of stakeholders they involve. Domains with many external participants are more complex and impose higher cognitive load, whereas isolated domains evolve more smoothly.

Global vs. Local

Balancing local simplicity with global complexity is crucial. Over‑micro‑service granularity reduces local complexity but increases global orchestration difficulty; conversely, monolithic designs simplify global interactions but raise local complexity.

Scaffolding

Architecture activities are temporary scaffolds that enable teams to build and later dissolve once the system can evolve autonomously. Like construction scaffolding, they must be removed after serving their purpose, yet new scaffolds will appear as the organization grows.

Conclusion

The ultimate goal of architectural work is engineering excellence, transforming “code monkeys” into designers who think critically about systems. Trust between leadership and teams, grounded in concrete evidence rather than rhetoric, is the key to successful modernization.

Team Introduction

Author: Tian Wei, from Taobao Group – Transaction Platform Technology Team, focusing on transaction link delivery, platform governance, and domain‑driven design.

Further Reading

3DXR Technology

Terminal Technology

Audio‑Video Technology

Server‑Side Technology

Technical Quality

Data & Algorithms