SlideShare a Scribd company logo
1 of 24
Download to read offline
My A1 transformation
The process of creating #1 TelCo app in Croatia
5
 Lack of improvements
 No cacheing
 Multiple backend calls per transaction
 >5 seconds avg. response time
 >10% error
My A1 transformation
Why?
6
 Tibco monolithic app
 Complex business requests
 Old technologies
 Bad comments on stores
My A1 transformation
What we had?
7
8
My A1 transformation
https://sli.do/
 Code : 091
 Ask questions
 Final quiz
 Great rewards
9
 My Tomato mobile app
 Rating increase
 My A1 prepaid app
 My A1 postpaid app
My A1 transformation
Activity flow
Tomato
redesign
Prepaid
redesign
Postpaid
redesign
Christmas
10
11
My A1 transformation
Technologies used
12
 Business goals
 New features and promotions
 A1 20th birthday
 Push notifications
My A1 transformation
Hard times
13
My A1 transformation
Results
monthly active users
Paying bills
In-app
engagement
+24%
+82%
+160%
14
My A1 transformation
500k+ downloads
35k+ reviews
4,3
Top listed1
Lessons learned
16
 The non-technical problems are the most difficult
My A1 transformation
Lessons learned
 Best Mobile App platinum winner
 Perfection is the enemy of progress
17
 Old app rewritten to Java code
 Modern technologies used
 1 year of development
 Window of opportunity
My A1 transformation
In short
18
My A1 transformation
Next steps
Permanent beta
More interesting
content for our
users
#1 TelCo app in
Croatia
<100ms avg.
response
Croatia’s fastest
growing telecom
in all the
categories
19
My A1 transformation
Bottom line
 Dead bugs will save your business
21
My A1 transformation
Q&A
 mailto: jozo.petrovic@a1.hr
Thank you!
24
My A1 transformation
Quiz time
 https://sli.do/
 Code : 091
 Great prizes for the top three in quiz

More Related Content

More from HUJAK - Hrvatska udruga Java korisnika / Croatian Java User Association

More from HUJAK - Hrvatska udruga Java korisnika / Croatian Java User Association (20)

Javantura v6 - Case Study: Marketplace App with Java and Hyperledger Fabric -...
Javantura v6 - Case Study: Marketplace App with Java and Hyperledger Fabric -...Javantura v6 - Case Study: Marketplace App with Java and Hyperledger Fabric -...
Javantura v6 - Case Study: Marketplace App with Java and Hyperledger Fabric -...
 
Javantura v6 - How to help customers report bugs accurately - Miroslav Čerkez...
Javantura v6 - How to help customers report bugs accurately - Miroslav Čerkez...Javantura v6 - How to help customers report bugs accurately - Miroslav Čerkez...
Javantura v6 - How to help customers report bugs accurately - Miroslav Čerkez...
 
Javantura v6 - When remote work really works - the secrets behind successful ...
Javantura v6 - When remote work really works - the secrets behind successful ...Javantura v6 - When remote work really works - the secrets behind successful ...
Javantura v6 - When remote work really works - the secrets behind successful ...
 
Javantura v6 - Kotlin-Java Interop - Matej Vidaković
Javantura v6 - Kotlin-Java Interop - Matej VidakovićJavantura v6 - Kotlin-Java Interop - Matej Vidaković
Javantura v6 - Kotlin-Java Interop - Matej Vidaković
 
Javantura v6 - Spring HATEOAS hypermedia-driven web services, and clients tha...
Javantura v6 - Spring HATEOAS hypermedia-driven web services, and clients tha...Javantura v6 - Spring HATEOAS hypermedia-driven web services, and clients tha...
Javantura v6 - Spring HATEOAS hypermedia-driven web services, and clients tha...
 
Javantura v6 - End to End Continuous Delivery of Microservices for Kubernetes...
Javantura v6 - End to End Continuous Delivery of Microservices for Kubernetes...Javantura v6 - End to End Continuous Delivery of Microservices for Kubernetes...
Javantura v6 - End to End Continuous Delivery of Microservices for Kubernetes...
 
Javantura v6 - Istio Service Mesh - The magic between your microservices - Ma...
Javantura v6 - Istio Service Mesh - The magic between your microservices - Ma...Javantura v6 - Istio Service Mesh - The magic between your microservices - Ma...
Javantura v6 - Istio Service Mesh - The magic between your microservices - Ma...
 
Javantura v6 - How can you improve the quality of your application - Ioannis ...
Javantura v6 - How can you improve the quality of your application - Ioannis ...Javantura v6 - How can you improve the quality of your application - Ioannis ...
Javantura v6 - How can you improve the quality of your application - Ioannis ...
 
Javantura v6 - Just say it v2 - Pavao Varela Petrac
Javantura v6 - Just say it v2 - Pavao Varela PetracJavantura v6 - Just say it v2 - Pavao Varela Petrac
Javantura v6 - Just say it v2 - Pavao Varela Petrac
 
Javantura v6 - Automation of web apps testing - Hrvoje Ruhek
Javantura v6 - Automation of web apps testing - Hrvoje RuhekJavantura v6 - Automation of web apps testing - Hrvoje Ruhek
Javantura v6 - Automation of web apps testing - Hrvoje Ruhek
 
Javantura v6 - Master the Concepts Behind the Java 10 Challenges and Eliminat...
Javantura v6 - Master the Concepts Behind the Java 10 Challenges and Eliminat...Javantura v6 - Master the Concepts Behind the Java 10 Challenges and Eliminat...
Javantura v6 - Master the Concepts Behind the Java 10 Challenges and Eliminat...
 
Javantura v6 - Building IoT Middleware with Microservices - Mario Kusek
Javantura v6 - Building IoT Middleware with Microservices - Mario KusekJavantura v6 - Building IoT Middleware with Microservices - Mario Kusek
Javantura v6 - Building IoT Middleware with Microservices - Mario Kusek
 
Javantura v6 - JDK 11 & JDK 12 - Dalibor Topic
Javantura v6 - JDK 11 & JDK 12 - Dalibor TopicJavantura v6 - JDK 11 & JDK 12 - Dalibor Topic
Javantura v6 - JDK 11 & JDK 12 - Dalibor Topic
 
Javantura v6 - Java SE, Today and Tomorrow - Dalibor Topic
Javantura v6 - Java SE, Today and Tomorrow - Dalibor TopicJavantura v6 - Java SE, Today and Tomorrow - Dalibor Topic
Javantura v6 - Java SE, Today and Tomorrow - Dalibor Topic
 
Javantura v6 - Future of the Humankind and the Universe - Ivica Puljak
Javantura v6 - Future of the Humankind and the Universe - Ivica PuljakJavantura v6 - Future of the Humankind and the Universe - Ivica Puljak
Javantura v6 - Future of the Humankind and the Universe - Ivica Puljak
 
Above and Beyond JDK 9, 10, 11, 12... - Branko Mihaljević and Martin Žagar on...
Above and Beyond JDK 9, 10, 11, 12... - Branko Mihaljević and Martin Žagar on...Above and Beyond JDK 9, 10, 11, 12... - Branko Mihaljević and Martin Žagar on...
Above and Beyond JDK 9, 10, 11, 12... - Branko Mihaljević and Martin Žagar on...
 
Javantura v4 - Self-service app deployment with Kubernetes and OpenShift - Ma...
Javantura v4 - Self-service app deployment with Kubernetes and OpenShift - Ma...Javantura v4 - Self-service app deployment with Kubernetes and OpenShift - Ma...
Javantura v4 - Self-service app deployment with Kubernetes and OpenShift - Ma...
 
Javantura v4 - Cloud-native Architectures and Java - Matjaž B. Jurič
Javantura v4 - Cloud-native Architectures and Java - Matjaž B. JuričJavantura v4 - Cloud-native Architectures and Java - Matjaž B. Jurič
Javantura v4 - Cloud-native Architectures and Java - Matjaž B. Jurič
 
Javantura v4 - KumuluzEE – Microservices with Java - Matjaž B. Jurič & Tilen ...
Javantura v4 - KumuluzEE – Microservices with Java - Matjaž B. Jurič & Tilen ...Javantura v4 - KumuluzEE – Microservices with Java - Matjaž B. Jurič & Tilen ...
Javantura v4 - KumuluzEE – Microservices with Java - Matjaž B. Jurič & Tilen ...
 
Javantura v4 - Keycloak – instant login for your app - Marko Štrukelj
Javantura v4 - Keycloak – instant login for your app - Marko ŠtrukeljJavantura v4 - Keycloak – instant login for your app - Marko Štrukelj
Javantura v4 - Keycloak – instant login for your app - Marko Štrukelj
 

Recently uploaded

MuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotes
MuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotesMuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotes
MuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotesManik S Magar
 
All These Sophisticated Attacks, Can We Really Detect Them - PDF
All These Sophisticated Attacks, Can We Really Detect Them - PDFAll These Sophisticated Attacks, Can We Really Detect Them - PDF
All These Sophisticated Attacks, Can We Really Detect Them - PDFMichael Gough
 
Time Series Foundation Models - current state and future directions
Time Series Foundation Models - current state and future directionsTime Series Foundation Models - current state and future directions
Time Series Foundation Models - current state and future directionsNathaniel Shimoni
 
Connecting the Dots for Information Discovery.pdf
Connecting the Dots for Information Discovery.pdfConnecting the Dots for Information Discovery.pdf
Connecting the Dots for Information Discovery.pdfNeo4j
 
A Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software DevelopersA Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software DevelopersNicole Novielli
 
4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector
4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector
4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sectoritnewsafrica
 
Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)Kaya Weers
 
JET Technology Labs White Paper for Virtualized Security and Encryption Techn...
JET Technology Labs White Paper for Virtualized Security and Encryption Techn...JET Technology Labs White Paper for Virtualized Security and Encryption Techn...
JET Technology Labs White Paper for Virtualized Security and Encryption Techn...amber724300
 
Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...
Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...
Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...Nikki Chapple
 
Glenn Lazarus- Why Your Observability Strategy Needs Security Observability
Glenn Lazarus- Why Your Observability Strategy Needs Security ObservabilityGlenn Lazarus- Why Your Observability Strategy Needs Security Observability
Glenn Lazarus- Why Your Observability Strategy Needs Security Observabilityitnewsafrica
 
Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...Farhan Tariq
 
QCon London: Mastering long-running processes in modern architectures
QCon London: Mastering long-running processes in modern architecturesQCon London: Mastering long-running processes in modern architectures
QCon London: Mastering long-running processes in modern architecturesBernd Ruecker
 
Generative AI - Gitex v1Generative AI - Gitex v1.pptx
Generative AI - Gitex v1Generative AI - Gitex v1.pptxGenerative AI - Gitex v1Generative AI - Gitex v1.pptx
Generative AI - Gitex v1Generative AI - Gitex v1.pptxfnnc6jmgwh
 
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical InfrastructureVarsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructureitnewsafrica
 
The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...
The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...
The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...Wes McKinney
 
UiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to HeroUiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to HeroUiPathCommunity
 
Digital Tools & AI in Career Development
Digital Tools & AI in Career DevelopmentDigital Tools & AI in Career Development
Digital Tools & AI in Career DevelopmentMahmoud Rabie
 
Potential of AI (Generative AI) in Business: Learnings and Insights
Potential of AI (Generative AI) in Business: Learnings and InsightsPotential of AI (Generative AI) in Business: Learnings and Insights
Potential of AI (Generative AI) in Business: Learnings and InsightsRavi Sanghani
 
2024 April Patch Tuesday
2024 April Patch Tuesday2024 April Patch Tuesday
2024 April Patch TuesdayIvanti
 
Modern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better StrongerModern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better Strongerpanagenda
 

Recently uploaded (20)

MuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotes
MuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotesMuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotes
MuleSoft Online Meetup Group - B2B Crash Course: Release SparkNotes
 
All These Sophisticated Attacks, Can We Really Detect Them - PDF
All These Sophisticated Attacks, Can We Really Detect Them - PDFAll These Sophisticated Attacks, Can We Really Detect Them - PDF
All These Sophisticated Attacks, Can We Really Detect Them - PDF
 
Time Series Foundation Models - current state and future directions
Time Series Foundation Models - current state and future directionsTime Series Foundation Models - current state and future directions
Time Series Foundation Models - current state and future directions
 
Connecting the Dots for Information Discovery.pdf
Connecting the Dots for Information Discovery.pdfConnecting the Dots for Information Discovery.pdf
Connecting the Dots for Information Discovery.pdf
 
A Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software DevelopersA Journey Into the Emotions of Software Developers
A Journey Into the Emotions of Software Developers
 
4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector
4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector
4. Cobus Valentine- Cybersecurity Threats and Solutions for the Public Sector
 
Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)Design pattern talk by Kaya Weers - 2024 (v2)
Design pattern talk by Kaya Weers - 2024 (v2)
 
JET Technology Labs White Paper for Virtualized Security and Encryption Techn...
JET Technology Labs White Paper for Virtualized Security and Encryption Techn...JET Technology Labs White Paper for Virtualized Security and Encryption Techn...
JET Technology Labs White Paper for Virtualized Security and Encryption Techn...
 
Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...
Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...
Microsoft 365 Copilot: How to boost your productivity with AI – Part two: Dat...
 
Glenn Lazarus- Why Your Observability Strategy Needs Security Observability
Glenn Lazarus- Why Your Observability Strategy Needs Security ObservabilityGlenn Lazarus- Why Your Observability Strategy Needs Security Observability
Glenn Lazarus- Why Your Observability Strategy Needs Security Observability
 
Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...Genislab builds better products and faster go-to-market with Lean project man...
Genislab builds better products and faster go-to-market with Lean project man...
 
QCon London: Mastering long-running processes in modern architectures
QCon London: Mastering long-running processes in modern architecturesQCon London: Mastering long-running processes in modern architectures
QCon London: Mastering long-running processes in modern architectures
 
Generative AI - Gitex v1Generative AI - Gitex v1.pptx
Generative AI - Gitex v1Generative AI - Gitex v1.pptxGenerative AI - Gitex v1Generative AI - Gitex v1.pptx
Generative AI - Gitex v1Generative AI - Gitex v1.pptx
 
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical InfrastructureVarsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
Varsha Sewlal- Cyber Attacks on Critical Critical Infrastructure
 
The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...
The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...
The Future Roadmap for the Composable Data Stack - Wes McKinney - Data Counci...
 
UiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to HeroUiPath Community: Communication Mining from Zero to Hero
UiPath Community: Communication Mining from Zero to Hero
 
Digital Tools & AI in Career Development
Digital Tools & AI in Career DevelopmentDigital Tools & AI in Career Development
Digital Tools & AI in Career Development
 
Potential of AI (Generative AI) in Business: Learnings and Insights
Potential of AI (Generative AI) in Business: Learnings and InsightsPotential of AI (Generative AI) in Business: Learnings and Insights
Potential of AI (Generative AI) in Business: Learnings and Insights
 
2024 April Patch Tuesday
2024 April Patch Tuesday2024 April Patch Tuesday
2024 April Patch Tuesday
 
Modern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better StrongerModern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
Modern Roaming for Notes and Nomad – Cheaper Faster Better Stronger
 

Javantura v7 - MojA1 transformation - Jozo Petrović

Editor's Notes

  1. Do you know the name of the Russian device to look through the wall? What do you think?
  2. It’s a window. I don’t know if you have ever been to A1 Croatia, but it’s a building with a lot of windows. Over time, these windows get dirty, so the view through them is not so clear anymore. Once, we came closer to the window and saw a lot of dead bugs there.
  3. So, we immediately called our colleagues to help us clean the dead bugs.
  4. The same is in business. Why? We found out that we need to clean our window, to change perspective. We knew that there are technologies that could bring us some great things. For example, cacheing would enable us to reuse the same backend response. In that way, we can avoid multiple backend calls per single transaction and reduce avg. response time. We just had to make a good pitch to our business and stakeholders, and to implement everything to be stable, with minimum errors.
  5. What we had at that time? We had a Tibco monolithic app, with hundreds of processes inside it. It was ok for the needs then, but was old and needed reorganization. As we cleaned our window of opportunities, we suddenly got a bunch of new business requests which were impossible to implement with Tibco. We were also in the need of new technologies which could make us more competitive on market and we had a lot of errors which reflected with bad comments on PlayStore and AppStore, so we definitely needed something better.
  6. That’s why we decided to do something great
  7. If you have any questions, take your phones, open sli.do with code 091 and ask questions in a digital way. I note that later we will have a quiz time with great prizes.
  8. Contrary to popular opinion, we in A1 Croatia are doing a lot of in-house development. Some of the really interesting products are My A1 mobile app and My Tomato mobile app. Those apps are allowing users to get a clear and simple overview of their gigabytes, minutes, SMSs, credit and debit card payments directly through the application. Also, customers can easily buy top-up vouchers for themselves and their loved ones, share gigabytes, and seek help through digital channels. Redeveloping process started with My Tomato mobile app. We used it as a PoC to prove that new tech stack is what we were looking for. Now we can say that it was, actually, a small experiment to gain some good results for a pitch. Few weeks after launch, we got first rating increase. Then we moved on to second step, which was divided on 2 substeps, because of business requirements. One for prepaid and one for postpaid users. It was one of the challenges, to switch the app layer for prepaid and postpaid users. We did it with different API version. That means that at the same time the app had to serve the old and the new design for prepaid users, and just the old design for postpaid users. Users were grateful, and we got another rating increase One of the biggest challenges with MyA1 postpaid app was the implementation of circuit breaker which turned out to one of the best features.
  9. We have just 0.2% errors on MyA1 app and avg. response time less than 500ms, which is 10 times faster and 50 times less errors. Those were the arguments that got stakeholders on our side. And compared to before, it is a huge win. Anyway, we have a lot of space for improvements. We have to remove those peeks which are representing the number of errors. They are happening because of the damaged data in our system, and it reflects by huge loading time
  10. All the fancy technologies we used, leaded by Openshift
  11. Let’s say you have a time slot for redeveloping process. How would you feel? And it’s summer. Half of your colleagues are on vacation. And a bunch of new features that needs to be launched in few weeks, because of 20 years of A1 Croatia. What do you think? That’s interesting… We didn’t love it!
  12. However, we did it! We got the results! Number of monthly active users increased by 24% Paying bills increased by 82% In-app engagement overall rose by 160% YoY
  13. And the fruits of our labor are increasing every day. Every promotion, every special option gets much more activations than ever before. In-app purchases have increased several times. All this keeps My A1 app a member of elite apps
  14. What we learned?
  15. non-technical problems stopped us in development for one month overall. We had to switch to plan B for lack of licences, which turned out to be a waste of time. //Actually, in most cases, technical problem is just a consequence of non-technical problem However, we won the BestMobileApp platinum award obviously you don't have to be perfect to be the best
  16. We've redeveloped everything into Java, using modern technologies and spent a whole year on development, but proved it was not in vain. Now we exactly know what do people think when they say „no stress release”. What do you think about it? We think that we wouldn’t have achieved anything if we hadn’t seen a dead bugs there.
  17. We will stay in permanent beta, making our projects better every day Creating a lot of interesting content for our users with response time less than 100ms So we could remain #1 TelCo app in Croatia And Croatia’s fastest growing telecom overall.
  18. What to conclude? Dead bugs will save your business, obviously!
  19. And I have only one question. What about your window?
  20. If you have any questions, feel free to ask.
  21. Thank you for your attention. My name is Jozo Petrović, and I am a verbally gifted developer 
  22. Surprise! We will have a quiz time now, don’t be like this guy!
  23. Take your phones, open sli.do with code 091, open Polls tab and join the quiz! We have great prizes for the top three of you. Good luck!5