Respectful self-motivator gifted at finding reliable solutions for software issues. Fluent in Android - iOS - KMM - Flutter and accustomed to working with cross-cultural, global teams achieving their mobile goals.

Sr. Android Developer

From 2021-09 at Xapo Global Services Limited

I am responsible for maintaining and further developing the Xapo Bank application where clients are able to spend their money, earn interest, invest in different assets.
My primary role in the company involved collaborating closely with cross-functional teams to ensure a seamless user experience for our clients.

• Developed and maintained high-quality Android code, implementing cutting-edge technologies such as Kotlin Multiplatform (KMP) and Ktor HTTP client.
• Collaborated with the payments team to help maintain and improve existing features in the application, ensuring a smooth user experience for our clients.
• During my time with the payments team I refactored major parts of the application to compose. While developing new features.
• Took on an opportunity to join a new feature development team within the company, focusing on helping users invest in multiple different assets.
• Successfully led the architecture design and implementation of the Android codebase and shared (Kotlin) code, ensuring adherence to best practices and standards.
• Contributed to the development of iOS features when necessary, demonstrating a strong commitment to cross-platform collaboration and delivery of high-quality products.
• Utilized Instabug for analytics and crash reporting, helping identify and address any issues affecting application performance and user experience.
• Used Firebase for real time changes, A/B testing and remote configuration.

• Compose/Swift UI - Flow - Coroutine - Arrow - Room/SQLdelight - Dagger/Koin - Ktor - Firebase - Instabug

Android Tech Lead

From 2018-12 to 2023-04 at D4L data4life gGmbH (formely Gesundheitscloud)

I was hired as a senior android developer with 3 other developers to build the company's first mobile application to store patient health records with an end to end encryption
• (MVVM - Coroutines - OpenCV - Room - Retrofit - In house crypto SDK)

In 2020 the company focus shifted towards corona research and the mobile team merged with the SDK team and we started a new app with KMP where I became the Android (KMP) tech lead and built the foundation of the new application
The common code holds the business logic and all the communication with external interfaces
The platform codes only responsible for the presentation
Since mid 2021 the application and my role is only maintenance as the desired functionality is reached
• (MVVM/VIPER - Compose/Swift UI - Flow - Coroutine - SQLdelight - Ktor)

Sr. Android Developer

From 2017-08 to 2019-03 at Viscaweb

Develop the company's android application in java & kotlin (WhatsTheScore, Marcadores, Futebol)
Configure and use related services • (Admob, Firebase, aws)
300k+ monthly active users, 99.7% crash free

Android developer

From 2015-10 to 2017-02 at Betvictor, Gibraltar

Maintaining and developing new features for existing application
Introduce and set up continuous integration
Modernize huge parts of the application • (RX,MVP,Retrofit)

Java developer engineer

From 2014-08 to 2015-09 at Nokia, Budapest

Porting a Java SE based end to end web application from Oracle database to Hadoop • (Spring Core/ MVC , Struts, JSP)
Implement new features and fixing bugs in the existing application
Create unit and integration tests, maintain CI • (Junit, Mockito, Jenkins, SonarQube)
Fully automated testing and deployment with supportive scripts • (bash, python)
Hold presentations and creating statements about various proof of concepts

Java developer

From 2013-03 to 2014-07 at Tigra, Budapest

Java EE business application development • (JBoss, JPA, JSF, Hibernate,JMS, JBPM, Groovy)
Create a java web application to support administrative workflow
Create unit tests • (Spock FW)
Oracle sql database management • (PL/SQL)
Supporting function in different script languages


Computer Scientist (BSc).

2008 to 2013 at Eotvos Lorand Science University, Budapest

Major field: Designing, constructing and handling of database and distributed systems.
Thesis: Geolocation based mobile massive multiplayer online game for Android
Professional practice: Webcorp International Kft., Debrecen
PHP programming, database management (MYSQL)


2004 to 2008 at Jáky József Secondary Technical School, Székesfehérvár

  • Experience in teamwork
  • Collaborate with the customer for needs assessment
  • Collaborate with colleagues all over the world
  • Task oriented mentality, organizational skills
  • Leading and supporting a small team
  • Designing and developing complex business web/mobile applications
  • Practical experience in Scrum and XP methodology
  • High sense for automatization and testing
  • Experience in devops and fast prototyping
© 2024 Bence Stumpf