Senior Software Engineer - Mobile (m/f/d)

Founded in 2012, wikifolio.com is a dynamic and rapidly growing FinTech in Vienna and the best-known company for B2C investments in German-speaking countries.

We believe that everybody should be able to invest successfully in the capital markets – regardless of whether you have €100 or €100,000 to invest. We stand for the democratisation of the investment market and put our users at the centre of our focus.

As our Senior Software Engineer - Mobile, you’ll take the lead in driving the development, optimization, and expansion of our mobile applications, including “wikifolio,” built with React Native. You’ll work closely with our tech lead and cross-functional teams to ensure we’re building solutions that truly address customer needs - solutions that are secure, extensible, and ready to scale. As a guardian of the technical maturity in your domain, you’ll have a clear view of architectural challenges and shape how we tackle them over time.

Responsibilities

• Provide technical guidance and mentorship within the mobile team, contributing to the development of high-quality mobile applications.
• Architect and implement mobile application features for iOS and Android according to the design provided by the design team.
• Develop and maintain a high-performance, scalable mobile application using React Native.
• Conduct comprehensive performance optimization and stability improvements.
• Implement robust testing strategies.
• Improve continuous integration/continuous deployment (CI/CD) processes with Fastlane & Azure DevOps.
• Collaborate closely with PM, Design, and Backend teams within an agile organisation, ensuring thorough discussion and alignment of product requirements with stakeholders and cross-functional teams.
• Review code, provide technical guidance, and maintain high-quality coding standards.
• Identify and resolve performance bottlenecks and technical debt.
• Stay updated with the latest mobile development trends and React Native best practices.

Requirements

• 5+ years of professional mobile application development experience.
• 5+ years of experience with React Native.
• Proficiency in JavaScript and TypeScript.
• Proven experience in developing and maintaining cross-platform mobile applications.
• Strong understanding of iOS and Android platform-specific considerations.
• Experience with state management strategies and frameworks.
• Experience with mobile app performance optimization techniques.
• Experience with mobile app testing frameworks like React native testing library, and Maestro.
• Understanding of RESTful API integration.
• Proficiency with Git and version control workflows.
• Experience with continuous integration and deployment pipelines using Fastlane.
• Strong verbal and written communication skills in English.
• An interest in the financial markets is required.

It's a plus if you have

• Knowledge of performance profiling tools like React Dev Tools.
• Understanding of mobile security best practices.
• End-to-end testing in Mobile applications.

Technical challenges you will work on

• Improving app performance and reducing load times.
• Implementing complex features with a modern user experience.
• Maintaining consistent functionality across iOS and Android platforms.
• Maintaining high test coverage.
• Implementing robust error handling and logging.

At wikifolio.com an exciting job environment awaits you in a dynamic, constantly growing and multiple award-winning fintech. Experimenting, failing early, learning and continuing is our motto. An innovative working world with opportunities for professional development is our goal. Expect real work-life balance as well. Become part of our team – we live by our values transparency, fairness, ambition, sustainability and joy and make investing available for everyone.

The minimum monthly salary for this position is €4,350 gross, in accordance with the IT-collective agreement, however the salary we offer will be adjusted in line with the successful candidate’s qualifications and experience.