DDDNorth – a day of free learning in Bradford

It was a 5am alarm that woke myself, and likely my colleagues, on a saturday morning when most people would be comfortably in the land of nod, or contemplating how best to laze away their saturday. For these tombola developers though, it was a drive down to Bradford to attend DDDNorth – a day long free conference setup and run by the community and supported by some brilliant sponsors. The drive down was uneventful, and we were presented with caffeine and brekky before the talks commenced.

Myself, Michael Tomaras, and Luke Hill were in attendance – I’ll relay the talks that were most inspiring to me.

There were two key talks for me – one, which I’ve heard and read a bit about anyway, was around the Spotify model for scaling agile by Stephen Haunts, and the second was a war story from Nathan Gloyn after 18 months of working on a number of projects where microservices played a part.

Microservices – Nathan Gloyn

We’re on a journey of growth at tombola that is seeing us diversify our software products in order to facilitate growth more readily – and although I’ve studied significantly around architecting, building, and supporting microservices, I thought a talk dedicated to ‘what I’ve learned after a year of building a system’ would be right up my street.

There was a bit of background about microservice patterns (and anti-patterns), and discussions around indetification of bounded contexts, fat vs thin microservices and just some key gotchas – security, service discovery, logging (and logging, and logging, and logging some more).

Some key takeaways:

  • Deployment (deploy small, avoid single repo for multiple services),
  • Identity and Authorisation (get these right up front – don’t attempt to retro fit it, it’ll get inordinately harder),
  • Build based upon need (not because it’s cool),
  • Configuration (strongly consider configuration management – consul/zookeeper/et al),
  • Logging (you can never log too much),
  • Monitoring (ensure you understand the baseline and health of each component, but ensure you are monitoring the system as a whole too),
  • System flow (correlation / session tokens in order to track journeys and requests through various systems is crucial)

None of these new, though distilled well by Nathan and he delivered an effective talk. The only thing missing from this for me was around the organisational change required to support microservices – a move we’re currently undertaking in terms of a shift away from a more monolithic single deploy application into many more smaller, co-ordinated, API driven services. Conways Law and team structure vs architecture design within an organisation is of key interest to me, and I think it’d have been nice to see a little more around this in the talk.

Scaling Agile with the Spotify Model – Stephen Haunts

Another useful war story about how Stephen and the team at his previous employer had managed the growth of the organisation via the spotify model which they modified in a rather comic ‘lord of the flies’ motif, with islands (multiple companies) and lookouts (marketing/sales type roles that protected the developers from the external landscape that was very much waterfall / deadline driven).

Some really refreshing pointers during this for me on just how best to empower and inspire the workforce while adapting to the growth and change of the organisation.

Key slide of the day for me though was one presented from a Harvard Business Review article.

This is such an incredible visual metaphor for just how satisfied, engaged, and inspired employees would be within an organisation, and I think this will be the one image that goes up on the wall in the office – definitely something to aspire to.


Post is also available at ops.tombola.co.uk (or will be, soon!)


A brilliant day of learning, some really useful talks, and a day to get some discussion with peers from the industry – all for the bargain price of £0.00. Further discussions with peers in other sectors who highlighted that recruitment for them was as difficult as it was for us, no matter how cool or interesting the work is you are doing (by the way, we’re hiring! see our careers site)

Free learning, free food, free chat, free inspiration – what’s not to like? Thanks DDDNorth.

Velocity Conf Europe 2013 – How to utterly inspire in three short days

The past 3 days have seen me attend VelocityConf Europe 2013 which (as the sub-title suggests) focuses on Web Performance and Operations.

Talks I attended can be seen here, though thankfully they seem to record all sessions, so if you missed it they’re available from here.

I had the chance to hangout with the @toptabletech guys (http://tech.toptable.co.uk/) (@ryantomlinson has just joined them and he moved to them from working with me), and they’re all top blokes – very clever, and clearly care about what they do.


Without a doubt one of the best conferences I’ve attended – the mix between operations talks (though often these were given a very devops slant) and web performance really did tick all of the boxes.  It feels very much like my learning time will be consumed by some of the approaches, tools and techniques I’ve seen covered over the past few days, and I remain utterly excited about putting some of this into practice.

It does make me question some of the cultural aspects within my own organisation – something I will endeavour to at least attempt to communicate effectively upon return – there are a lot of things we could be doing better (myself very much included).

Overall, not that my passion was lacking anyway, though I’m entirely re-fired up around the areas I’ve seen talked of – monitoring/metrics, continuous integration/deployment, testing all the things, and automation, with that constant backnote on the cultural.

I became acutely aware of just how narrow my scope of development was (.net developer/PC based), and time and again a lot of the tooling shown while it likely worked on windows ‘ok’, was better geared up to either a mac os/linux background – the mac to PC ratio was scary, and it’s certainly something where I’m now going to experiment with mac as a dev machine (VM’ing into windows for the .net stuff).

I’ll cover some of the details on some of the talks I attended, though obviously covering every talk from 3 days worth is going to see at least some repetition so apologies if I miss anything/anyone out.

The below is as much so that I have all of the pointers in one place to the stuff I want to look at, though hopefully others will find it useful.

Responsive Images – Yoav Weiss

Cracking start, Yoav highlighted 72% of responsive websites serve the same resources to all form factors (we use picturefill).  I liked the look of http://sizersoze.org as a tool to highlight what you were doing at different breakpoints (in terms of savings to be made, etc.)

He highlighted mobify.js, which although a clever implementation, feels like an overwhelming hack to get around some of the limitations currently in play on browsers/http.

First mention of http://worldwidepagetest.com/ in this session too.

Be Mean to your code with Gauntlt – James Wickett

I moved from the more ops’y (TCP tuning/TLS perf etc.) talk into James’ security talk, and I wasn’t disappointed.

Gauntlt provides a means of automating a number of other attack tools and overall was the first thing where I thought ‘getting that into our build is essential’ – another talk where ‘it’s easier on a mac’ (probably the first, not the last).

Making Government Digital Services Fast – Paul Downey

Loved this talk – really nice to see how effectively these guys release and how the mindset shift was entirely around ‘what does the user want’.  Their ‘dark release’ rollout worked well, and it was one of the first talks (though again not the last) that highlighted how important instrumentation was – how do you know you’ve been successful (or otherwise) if you don’t have figures backing it up.

Stand Down Your Smartphone Testing Army – Mitun Zavery

I mention this not only because it was a good talk, though I really must have a look and play with http://www.deviceanywhere.com/.  Really nice little tool.

Testing all the way to production – Sam Adams

Loved the ‘continuous delivery’ from day 1 approach, and the mindset that each commit I make ‘I believe this code is safe to go into production’, though obviously again the monitoring metrics come in, and it’s the pipeline’s job to prove that statement wrong – strong enough pipeline builds confidence that you’ve caught ‘all the things’.

They do a lot of ‘in live’ testing, though their isolation model seemed to work really well – something I have to investigate.

Global Web Page Performance – James Smith

Although the demo didn’t go great for James, I’d used the site the day before as it was mentioned in one of the workshops and it’s a really nice abstraction over http://webpagetest.com – certainly useful.

HTTP Archive, BigQuery and you! – Ilya Grigorik

This was one of those ‘holy shit!’ demos – taking HTTP Archive data and making it accessible/queryable – see (and play with) http://www.igvita.com/2013/06/20/http-archive-bigquery-web-performance-answers/ – incredible.

Gimme more! Enabling user growth in a performant and efficient fashion

Some useful stats in this great talk – by 2017 there’ll be 5.2 billion mobile users, making more than 10 billion connections!  Mobile video will increase 16 fold between 2012 and 2017.

New Image Formats

Images make up 61% of page bytes – 65% of page bytes on mobile!  The encoding techniques we have in place are in some cases 15 years old.  WebP (less supported) and JPEG eXtended Range (JXR) look to be the next big thing in image compression and both although not heavily supported right now, if you have in place content-negotiation/browser sniffing, you could save considerable bandwidth.

Code Club – John Edwards

I love this – https://www.codeclub.org.uk/ – teaching children to code in a structured/supported way, and volunteering your own time to help.  I will be investigating this to see how best I can fit in – time is key I guess (support from employer etc.) but I really love the concept so I hope I can get involved in some way.  John Edwards did an amazing job of presenting it, and the video (http://www.youtube.com/watch?v=Ci3hY83rUwU) had me both chuckling and incredibly emotionally moved.  Great cause.

General Thoughts – Culture

A number of the talks focussed around the cultures within the organisations that we work, and in how the culture almost entirely underpins how and what you achieve and the direction of work. 

One of the best talks of the conference for me was given by John Willis, entitled ‘Culture as a Strategic Weapon’, which focussed on some of the core tenets of successful devops (CAMS – Culture, Automation, Measurement, and Sharing).

It’s made me more determined to keep pressing on with both working with, and encouraging new directions within my own organisational culture – as he said, ‘If you can’t change your culture, change your culture’ and the immortal words of ‘get the hell out of dodge’.  Working towards a better organisational culture feels like the right fight to be having, but this one talk has generated me more inspiration than any other single talk at the conference.

When seeing how effective some of the guys I talked to were being with things like ‘30% time’ and how much other organisations invest in their staff, it very much feels like there are lessons I can bring home here.

General Thoughts – Tooling

There are so many cool tools – too many to name, though the links I’ve put above are a good starter – there are so many people working on tools to both monitor, test and graph ‘all the things’ so that we get closer and closer to reliable, repeatable, understandable and maintainable releasing.

Closing Thoughts

I thankfully have a solid team of developers where I work who will be very keen to be involved in this.  We’re not bad, we do automate a lot of our build pipeline, though we don’t have enough monitoring/metrics in place. 

The conference has entirely re-invigorated me and as I sit here writing up, the thing exciting me most is ‘where do I start’ – I look forward to the playtime!

This was a great conference, and was great to be around likeminded, passionate people who were all about sharing how they got to where they are, where they want to be, and how they intend to get there.

Oh, and thanks to the facebook staff who took us to the pub on thursday night – I really enjoyed the talk with you guys and learned an awful lot!


Bring it on 🙂