Authors

Author of *Building Event-Driven Microservices*; event-driven architecture specialist; event schema design and data liberation

Contributing author *Software Architecture Metrics* ch. 9; creator of Sonargraph; structural metrics (Propagation Cost, Relative Cyclicity, SDI, Maintainability Level, LCOM4, Component Rank); six golden rules; structural erosion as default outcome

Contributing author *Software Architecture Metrics* ch. 1; DORA four key metrics practitioner; delivery transformation consultant

Wrote Ch. 1 of *Site Reliability Engineering*; VP Engineering at Google; originator of the term "Site Reliability Engineering"; creator of the error budget model

Co-editor of *Site Reliability Engineering*; Google Technical Writer for SRE; cultural and documentary aspects of reliability

Co-author of *Enterprise Integration Patterns*; messaging middleware and design patterns practitioner

Contributing author *Software Architecture Metrics* ch. 4; developer of the Modularity Maturity Index (MMI); empirical architecture quality measurement grounded in cognitive science

Co-author of *Chaos Engineering*; built and managed Netflix's Chaos Engineering team; co-creator of the Principles of Chaos Engineering

Co-author of *Reliable Machine Learning*; ML systems practitioner; SRE approach to ML production operations

Author of *AI Engineering*; Stanford lecturer (CS 329S: ML Systems Design); ML systems and AI engineering specialist

Co-editor of *Site Reliability Engineering*; Google SRE on App Engine; platform-service and capacity-planning perspective

Editor of *Software Architecture Metrics*; contributing author ch. 5; private build antipattern remediation; trunk stability as architectural prerequisite

Co-author of *Reliable Machine Learning*; Google research scientist; coined "hidden technical debt in machine learning systems"

Co-author of *Mastering API Architecture*; Principal Technologist at Datawire; security and gateway expert

Contributing author *Software Architecture Metrics* ch. 3; co-author of *Continuous Delivery*; testability and deployability as architectural drivers; TDD as design discipline

Contributing author *Software Architecture Metrics* ch. 7; co-author of *Continuous Architecture in Practice*; quality attribute measurement framework; MTTR > MTBF; RPO/RTO

Author of *Domain-Driven Design* (2003); originator of DDD vocabulary

Co-author of *Accelerate*; founder and CTO of Tripwire; co-author of *The Phoenix Project* and *The DevOps Handbook*; high-performing technology organisation researcher

Co-author of *Enterprise Integration Patterns*; enterprise messaging and integration architect; ESB and MOM specialist

Author of *Foundations of Scalable Systems*; distributed systems architect; scalability measurement and empirical architecture

Co-author of *Mastering API Architecture*; API-first and contract testing specialist

Co-editor of *Site Reliability Engineering*; Google SRE Programme Manager; training, on-call rotation design, postmortem culture

Co-author of *Accelerate*; co-author of *Continuous Delivery*; CI/CD, Lean, DevOps practitioner; DORA research programme

Contributing author *Software Architecture Metrics* ch. 6; sociotechnical architecture; KPI Value Tree; Big Picture EventStorming for architectural strategy

Author of *A Philosophy of Software Design*; Stanford CS professor; creator of Tcl and Raft; deep modules, information hiding, and complexity management advocate

Co-author of *Reliable Machine Learning*; ML engineering practitioner; data management and fairness

Co-author of *Team Topologies*; DevOps and platform engineering consultant; team interaction and organisational sensing specialist

Author of *Fundamentals of Software Architecture* (with Ford), *Software Architecture Patterns*, *Software Architecture: The Hard Parts*

Author of *Patterns of Enterprise Application Architecture*; ThoughtWorks Chief Scientist; coined Transaction Script, Domain Model, Active Record, Data Mapper, Repository, Service Layer

Author of *Designing Data-Intensive Applications*; distributed systems researcher at Cambridge; CRDT and local-first software advocate

Co-author of *Mastering API Architecture*; cloud migration and deployment strategy specialist

Co-author of *Team Topologies*; co-creator of Team Topologies model; fast flow and organisational design specialist

Contributing author *Software Architecture Metrics* ch. 10; author of *Design It!*; Goal-Question-Metric (GQM) framework; measurement as alignment and coaching tool

Author of *Release It!*; stability patterns practitioner; coined Circuit Breaker, Bulkhead, Timeout in the software context; design-for-production advocate

Author of *Fundamentals of Software Architecture* (with Richards), *Building Evolutionary Architectures*, *Software Architecture: The Hard Parts* (with Richards, Sadalage, Dehghani); contributing author *Software Architecture Metrics* ch. 8

Co-editor of *Site Reliability Engineering*; co-author of *Reliable Machine Learning*; Google SRE in Dublin; incident response, federation, SRE applied to ML systems

Co-author of *Accelerate*; PhD in MIS; DORA research programme; psychometric and statistical rigour applied to DevOps; four key metrics originator

Co-author of *Chaos Engineering*; Netflix Chaos Engineering team; safety science and sociotechnical systems perspective

Co-author of *Building Evolutionary Architectures*; technical leadership and engineering culture specialist

Co-author of *Software Architecture: The Hard Parts*; data architect at ThoughtWorks; evolutionary database design and NoSQL specialist

Co-author of *Building Evolutionary Architectures*; ThoughtWorks CTO; distributed systems and evolutionary computation background

Contributing author *Software Architecture Metrics* ch. 2; fitness function testing pyramid; architectural verification frameworks

Author of *Understanding Distributed Systems*

Author of *Monolith to Microservices* and *Building Microservices*; independent deployability, migration planning, monolith decomposition

Co-author of *Reliable Machine Learning*; SRE practitioner; applying SRE discipline to ML training and serving pipelines

Author of *Learning Domain-Driven Design*; DDD practitioner and educator; strategic and tactical DDD, EventStorming

Co-author of *Software Architecture: The Hard Parts*; creator of Data Mesh; analytical data and domain data ownership advocate