About Dev Days

The region's top developer conference

This year's Dev Days will look towards the event horizon of 2017 and beyond. As part of the preparation for future challenges, we're going to introduce Spring 5 as a brand-new generation of the framework and selected feature highlights in the context of modern system environments.

By examining impact mapping, the conference will help your software survive and thrive in a world of shifting tech. Communication, organizational learning, proper risk assessment, and the pitfalls of Groupthink will be examined through spacefaring attempts made by NASA, helping us learn from the past when looking into the future of software development.

Schedule - Open Day - Saturday, 13th of May

Join us at Terme Tuhelj on Saturday 13 May for keynotes by Infobip's lead developers and international guest lecturers.


This year’s lineup includes Infobip’s finest, as well as international experts


Co-founder of the Spring Framework project

Abstract: Spring Framework 5: Themes & Trends

Spring Framework 5 (scheduled for general availability in June) comes with a strong focus on several themes: reactive web applications based on Reactive Streams, functional configuration with Java 8 as well as the Kotlin language, comprehensive support for JDK 9 and HTTP/2, plus the latest API generations in the Enterprise Java ecosystem. This talk presents the overall story in the context of wider industry trends, highlighting Spring's unique programming model strategy.

Short bio:

Juergen Hoeller is co-founder of the Spring Framework open source project and has been serving as the project lead and release manager for the core framework since 2003. Juergen is an experienced software architect and consultant with outstanding expertise in code organization, transaction management and enterprise messaging.


Software delivery consultant

Abstract: Migrating to serverless

We moved a large collaboration platform from Heroku to AWS Lambda, and reduced hosting costs by 50% even though the number of active users grew by 50%, and replaced our biggest bottleneck with something that scales effortlessly. This is an experience report from that journey.

Serverless architectures bring significant benefits, but have a major impact on architecture, require teams to re-think how to approach sessions, storage, authorization and testing. You'll find out what worked well for us, where we got stuck, and how we made it work well at the end.

Short bio:

Gojko Adzic is a strategic software delivery consultant who works with ambitious teams to align software delivery with business goals, and improve the quality of their software products and processes. Gojko specializes in are agile and lean quality improvement, in particular impact mapping, agile testing, specification by example and behavior driven development.

Gojko’s book Specification by Example won the Jolt Award for the best book of 2012. In 2011, he was voted by peers as the most influential agile testing professional, and his blog won the UK Agile Award for the best online publication in 2010.

Gojko is a frequent keynote speaker at leading software development conferences, and one of the authors of MindMup and Claudia.js.


Senior Lecturer, consultant and speaker

Key Attibutes:

  • One of the top rated Lecturers at Cranfield
  • 30 years in Projects & Programmes
  • Project & Programme Management expert
  • Global Clients – lecturing & consultancy
  • Has worked in Europe, USA, Middle East & Asia
  • Fellow of The Association of Project Management
  • Fellow of The Institute of Risk Management
  • Expert in Projects, Programmes, Risk, Communications, Crisis.

Stephen is rated as one of the top 3 lecturers at one of Europe’s top MBA Business Schools. He has a reputation of taking complex management concepts such as Project, Programme Change and Crisis Management and being able to distil them down, into highly informative and fast lectures - often using “storytelling” techniques. His attitude is “if you haven’t done it – you shouldn’t be teaching it!”

Unusually, for an academic, he has actually has spent most of his working life in real business and still runs his own, highly successful, Project Management Company (his client list now reads like the FTSE/Dow top 100!)

The Shuttle case

January 28th 1986 - the space shuttle Challenger explodes just one minute after launch. As the world looked on horrified, few realised that this was an inevitable accident that had been predicted by the designers for years. Indeed, the day before the key engineers believed that there was “essentially a 100% probability of disaster”.

Then in Feb 2003 – the Space Shuttle Colombia burns up on re-entry and the entire crew perish. The chilling fact was that this was a management repeat of the Challenger disaster – NASA had not truly learned the lessons of the past.


Infobip co-founder and CTO

Short bio:

Having co-founded Infobip in 2006, Izabel devoted remarkable energy to building what would become one of the world’s top-performing A2P SMS systems. Today, Infobip processes 300 million messages every day - more than regional carriers combined!

Over the years, he’s been heavily focused on building optimal client experience, struggling with all the challenges that every telecoms technical lead knows all too well. It’s been everything from trivial slow disk issues to huge Linux storage, from SCCP layer snooping to handling DDoS attacks, from handling a huge monolithic service to unbundling services and their infrastructure.

Company’s transition from two to 140+ developers - lined up in 29 agile teams and 7 R&D centers - brought out new skills and duties for its CTO. Yet, he remained a passionate developer at heart, trying to steal a moment or two to keep up with the latest technologies and build them into Infobip’s platform.


Senior Software Architect/Division Lead

Abstract: Kafka's role in Infobip data pipeline architecture

Kafka is used for building real-time data pipelines and streaming apps; it is horizontally scalable, fault-tolerant and fast. In this talk I will present our use case for using Kafka to enable real-time processing of tens of thousands of messages per second and will describe our journey in building our data pipeline with Kafka in the middle. With overview of what Kafka is, how it works I will also show you how we ensure our Kafka cluster is up and running 24/7, how we monitor it, which operational challenges we face on daily bases and what lessons we learned along the way. If you are thinking about using Kafka and are wondering how it would look like and what you can expect this talk is for you.

Short bio:

Mario Zagar is a solutions architect and development lead with over 10 years of experience in designing, developing, deploying and maintaining mission critical applications in automotive and telecommunications industry. For the last couple of years he has been working as a senior software architect, scrum master and division lead at Infobip where he helps build and evolve Infobip’s messaging platform using microservices architecture.


Senior Software Engineer/Team Leader

Abstract: How we monitor Infobip platform with Prometheus

Prometheus is a open-source monitoring and alerting solution with some great features like powerful queries, great visualisation and efficient data storage. This talk will be about Prometheus and how we manage to integrate it on Infobip platform. If you want to learn more about software monitoring using modern solution like Prometheus or you just enjoy watching graphs, come and join me.

Short bio:

Ivica Obestar is senior software engineer and team leader with over 4 years of development experience. For the last three years he is working as a lead developer on infrastructure projects: distributed systems, micro-service architecture, continuous integration and software monitoring.

Treasure hunt

You enjoy solving logic-based challenges? Like to crack code and find solutions by thinking out of the box? Have fun and win your prize in the Treasure Hunt we'll be hosting as part of the program!

Dev Days photos

To give you a taste of what Dev Days are like, check out some photos from our previous conferences.

Infobip DevDays 2016 - Flickr gallery
Infobip DevDays 2015 - Flickr gallery


View videos and lectures from the previous Infobip DevDays.

Infobip DevDays 2016 on Vimeo
Infobip DevDays 2015 on Vimeo

Media partners.


You have questions about Dev Days? We thought so.

  • What does Infobip do?

    Our mobile services cloud connects enterprises, developers and businesses with mobile operators, enabling them to reach, engage and monetise mobile users. Our APIs make it easy to integrate SMS into any mobile app, web app, or enterprise system. Interested? Check them out here.

  • What are Infobip's core technologies?

    Our core technology is professional SMS messaging based on APIs and web apps. We invest heavily in in-house development to keep up with the needs and requirements of our clients worldwide: we have over 140 developers in 7 offices, who are using scrum methodology and working in Java, .NET, Spring, Groovy, Android, iOS, Node.js, Angular, React, Perl, Adobe flash, Neo4j, Mongo, Elasticsearch and SQL.

  • Why should I attend Dev Days?

    You’ll meet esteemed international experts and authors, and one of the most impressive developer forces of the mobile industry. You'll hear their experiences, expand horizons, exchange ideas. We're honored to welcome anyone with a passion for technology and coding - you'll be a true credit to the conference!

  • Does it cost a lot?

    We believe passion for technology is to be shared with the many. So, 190 kn gets you in, and includes lunch, refreshments and coffee breaks.

  • Again, where and when?

    Saturday, 13 May 2017, Terme Tuhelj, Croatia.


Get your ticket now!