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Barry O Sullivan profile picture

Barry O Sullivan

Lead Developer and Solutions Architect, I specialise in Event Sourcing, DDD and Event Driven systems. PHP and GoLang developer. Enjoys being a smart ass and having a nice whiskey.

Location Ireland Joined Joined on  Twitter logo GitHub logo LinkedIn logo External link icon
Education

MSc in Computer Science, Trinity College, Dublin

Work

Lead Developer and Solutions Architect at Contractor

Estimating software: How to deal with requests for estimates
barryosull profile

Estimating software: How to deal with requests for estimates

#estimates #productivity #communication
Reactions 20
7 min read

Recent comments

Template Driven Development: Why it doesn't work

Thanks for the comment Yaser. You are completely correct, ...

Template Driven Development: Why it doesn't work

Hi Camilla, thanks for the comment, glad you enjoyed the ar...

Event Sourcing: What it is and why it's awesome

Hi Victor, It is definitely opinionated, the goal of the a...

Say something nice about another DEV member

@kspeakman Thank you so much for the mention, I really app...

Domain Driven Design for Everyone Else

I'm going respond here with the clarification I put at the ...

Domain Driven Design for Everyone Else

Thanks Ben!

Communication styles - Working effectively as a team

A pleasure. I enjoyed your followup to it as well, some sol...

Communication styles - Working effectively as a team

I honestly wouldn't, your comment was in no way negative or...

View all 52 comments
Template Driven Development: Why it doesn't work
barryosull profile

Template Driven Development: Why it doesn't work

#architecture #design #training
Reactions 15 Comments 4
7 min read
Introducing DDD to your Company
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Introducing DDD to your Company

#ddd #architecture #design
Reactions 42 Comments 1
9 min read
Folder Structure and Frameworks: What is exerting control?
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Folder Structure and Frameworks: What is exerting control?

#ddd #architecture #softwaredesign
Reactions 50 Comments 2
5 min read
Managing projectors is harder than you think
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Managing projectors is harder than you think

#projectors #cqrs
Reactions 19
6 min read
Domain Driven Design for Everyone Else
barryosull profile

Domain Driven Design for Everyone Else

#ddd #productivity #learning
Reactions 227 Comments 10
6 min read
Communication styles - Working effectively as a team
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Communication styles - Working effectively as a team

#productivity #communication #leadership #brainstorming
Reactions 125 Comments 12
5 min read
Acceptance testing your PHP app with ease
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Acceptance testing your PHP app with ease

#tdd #php #acceptancetests
Reactions 40
5 min read
Immediate vs eventual consistency
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Immediate vs eventual consistency

#eventsourcing #architecture #eventdriven #eventualconsistency
Reactions 33 Comments 3
6 min read
Writing a DSL parser using PegJS
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Writing a DSL parser using PegJS

#dsl #parsing #pegjs
Reactions 27 Comments 5
4 min read
Projection Building Blocks: What you'll need to build projections
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Projection Building Blocks: What you'll need to build projections

#cqrs #projections #php
Reactions 26 Comments 9
8 min read
Write DSLs and Code Faster
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Write DSLs and Code Faster

#dsl #parsing #customlanguage
Reactions 26 Comments 8
4 min read
Event Granularity: Modelling events in event driven applications
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Event Granularity: Modelling events in event driven applications

#events #design #distributedsystems
Reactions 49 Comments 2
6 min read
Developer deprogramming: Getting started in Event Sourcing
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Developer deprogramming: Getting started in Event Sourcing

#eventsourcing #ddd #crud #mistakes
Reactions 33 Comments 11
6 min read
Immediate Consistency in Event Sourcing
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Immediate Consistency in Event Sourcing

#eventsourcing #webdev #php #constraints
Reactions 25 Comments 7
8 min read
Event Sourcing: What it is and why it's awesome
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Event Sourcing: What it is and why it's awesome

#eventsourcing #powerful #webdev #projections
Reactions 300 Comments 72
9 min read
Messy Event Flows: Part 2 - What it should be
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Messy Event Flows: Part 2 - What it should be

#eventsourcing #eventstorming #remodelling #constraints
Reactions 11 Comments 4
5 min read
Messy Event Flows: Part 1
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Messy Event Flows: Part 1

#eventsourcing #eventstorming #aggregateboundaries #problemorientated
Reactions 9
5 min read
Notes from "Growing Object Oriented Software, Guided by Tests"
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Notes from "Growing Object Oriented Software, Guided by Tests"

#testing #tdd #software #book
Reactions 14 Comments 2
5 min read
Cleaning up your codebase with a clean architecture
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Cleaning up your codebase with a clean architecture

#cleancode #layeredarchitecture #php #design
Reactions 121 Comments 16
9 min read
Why I don't like traits
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Why I don't like traits

#php #traits #antipattern
Reactions 18
3 min read
Hi, I'm Barry O Sullivan
barryosull profile

Hi, I'm Barry O Sullivan

#introductions
Reactions 9
1 min read
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