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.

Ireland Joined on May 1, 2017 https://barryosull.com/

Education

MSc in Computer Science, Trinity College, Dublin

Work

Lead Developer and Solutions Architect at Contractor

Barry O Sullivan

Mar 2 '20

Estimating software: How to deal with requests for estimates

#estimates #productivity #communication

7 min read

Template Driven Development: Why it doesn't work

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

Jan 7 '20

Template Driven Development: Why it doesn't work

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

Jan 7 '20

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

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

May 12 '19

Say something nice about another DEV member

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

Oct 31 '18

Domain Driven Design for Everyone Else

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

Jul 25 '18

Domain Driven Design for Everyone Else

Thanks Ben!

Jul 19 '18

Communication styles - Working effectively as a team

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

Jun 14 '18

Communication styles - Working effectively as a team

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

Jun 12 '18

View all 52 comments

Barry O Sullivan

Jan 6 '20

Template Driven Development: Why it doesn't work

#architecture #design #training

17 4

7 min read

Barry O Sullivan

Jul 15 '19

Introducing DDD to your Company

#ddd #architecture #design

47 1

9 min read

Barry O Sullivan

May 17 '19

Folder Structure and Frameworks: What is exerting control?

#ddd #architecture #softwaredesign

52 2

5 min read

Barry O Sullivan

Aug 13 '18

Managing projectors is harder than you think

#projectors #cqrs

6 min read

Barry O Sullivan

Jul 19 '18

Domain Driven Design for Everyone Else

#ddd #productivity #learning

234 10

6 min read

Barry O Sullivan

Jun 11 '18

Communication styles - Working effectively as a team

#productivity #communication #leadership #brainstorming

127 12

5 min read

Barry O Sullivan

Apr 23 '18

Acceptance testing your PHP app with ease

#tdd #php #acceptancetests

5 min read

Barry O Sullivan

Apr 9 '18

Immediate vs eventual consistency

#eventsourcing #architecture #eventdriven #eventualconsistency

40 3

6 min read

Barry O Sullivan

Feb 12 '18

Writing a DSL parser using PegJS

#dsl #parsing #pegjs

22 5

4 min read

Barry O Sullivan

Jan 30 '18

Projection Building Blocks: What you'll need to build projections

#cqrs #projections #php

35 9

8 min read

Barry O Sullivan

Jan 23 '18

Write DSLs and Code Faster

#dsl #parsing #customlanguage

19 8

4 min read

Barry O Sullivan

Dec 6 '17

Event Granularity: Modelling events in event driven applications

#events #design #distributedsystems

53 2

6 min read

Barry O Sullivan

Nov 20 '17

Developer deprogramming: Getting started in Event Sourcing

#eventsourcing #ddd #crud #mistakes

33 11

6 min read

Barry O Sullivan

Sep 25 '17

Immediate Consistency in Event Sourcing

#eventsourcing #webdev #php #constraints

28 7

8 min read

Barry O Sullivan

Aug 29 '17

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

#eventsourcing #powerful #webdev #projections

319 73

9 min read

Barry O Sullivan

Aug 21 '17

Messy Event Flows: Part 2 - What it should be

#eventsourcing #eventstorming #remodelling #constraints

11 4

5 min read

Barry O Sullivan

Aug 13 '17

Messy Event Flows: Part 1

#eventsourcing #eventstorming #aggregateboundaries #problemorientated

5 min read

Barry O Sullivan

May 31 '17

Notes from "Growing Object Oriented Software, Guided by Tests"

#testing #tdd #software #book

14 2

5 min read

Barry O Sullivan

May 15 '17

Cleaning up your codebase with a clean architecture

#cleancode #layeredarchitecture #php #design

129 16

9 min read

Barry O Sullivan

May 1 '17

Why I don't like traits

#php #traits #antipattern

3 min read

Barry O Sullivan

May 1 '17

Hi, I'm Barry O Sullivan

#introductions

1 min read

DEV Community

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Barry O Sullivan

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Skills/Languages

Estimating software: How to deal with requests for estimates

Recent comments

Template Driven Development: Why it doesn't work

Template Driven Development: Why it doesn't work

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

Say something nice about another DEV member

Domain Driven Design for Everyone Else

Domain Driven Design for Everyone Else

Communication styles - Working effectively as a team

Communication styles - Working effectively as a team

Template Driven Development: Why it doesn't work

Introducing DDD to your Company

Folder Structure and Frameworks: What is exerting control?

Managing projectors is harder than you think

Domain Driven Design for Everyone Else

Communication styles - Working effectively as a team

Acceptance testing your PHP app with ease

Immediate vs eventual consistency

Writing a DSL parser using PegJS

Projection Building Blocks: What you'll need to build projections

Write DSLs and Code Faster

Event Granularity: Modelling events in event driven applications

Developer deprogramming: Getting started in Event Sourcing

Immediate Consistency in Event Sourcing

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

Messy Event Flows: Part 2 - What it should be

Messy Event Flows: Part 1

Notes from "Growing Object Oriented Software, Guided by Tests"

Cleaning up your codebase with a clean architecture

Why I don't like traits

Hi, I'm Barry O Sullivan