Engineering Journal

Field Notes on Distributed Systems & Integration Architecture

In-depth technical guides, failure mode analyses, and architectural patterns authored by our senior systems consultants.

Eliminating Dual-Write Vulnerabilities in Distributed Systems
Architecture Data Consistency Distributed Systems

Eliminating Dual-Write Vulnerabilities in Distributed Systems

Why saving to a SQL database and publishing to an event queue inside a single HTTP handler inevitably leads to silent state corruption, and how the transactional outbox pattern prevents it.

Xiaolin Zhang, Principal Systems Consultant March 13, 2026 · 8 min read
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Bridging Legacy AS/400 and Mainframe Systems with Modern gRPC Services
Legacy Systems Protocols Middleware

Bridging Legacy AS/400 and Mainframe Systems with Modern gRPC Services

Practical engineering strategies for constructing resilient anti-corruption layers between thirty-year-old operational cores and microservice frontends in manufacturing enterprises.

Shengyu Chen, Senior Integration Specialist February 27, 2026 · 11 min read
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Schema Evolution and Backward Compatibility Governance in Event Buses
Event Streaming Governance API Design

Schema Evolution and Backward Compatibility Governance in Event Buses

How to establish schema registries, semantic versioning rules, and contract testing so that independent development teams never break shared integration pipelines.

Xiaolin Zhang, Principal Systems Consultant January 18, 2026 · 9 min read
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