Mobile Developer

Your mission

The Hashgraph Group (THG) is a global organization headquartered in Switzerland, and is a part of the Hedera Hashgraph ("Hedera") ecosystem. 
 
Hedera is a revolutionary proof-of-stake public Distributed Ledger Technology (DLT) network that is fast emerging as the gold standard in DLT for enterprise-grade solutions and decentralized applications (dApps). Hedera is governed by a council of the world's leading organizations - which include Google, Boeing, IBM, Dell, Deutsche Telekom, LG, Abrdn, London School of Economics,  to name a few.
 
THG works closely with enterprises, startups, governments, and academic and training institutions around the world to deliver financing, custom-design solutions, and professional training and innovation programs, aimed at accelerating the development and utilization of the Hedera Hashgraph network.

As we undergo rapid expansion, we are establishing offices in strategic locations worldwide. We are currently seeking a highly skilled and experienced Requirements Engineer to join our dynamic product development team. This role is crucial in bridging the gap between stakeholders and the development team, ensuring that product requirements are clearly defined, prioritized, and effectively communicated.

Your profile

Are you a versatile and skilled Mobile App Developer looking to take ownership of a core mobile application? We are seeking a proactive individual to manage, maintain, and enhance our company's mobile wallet. This is a key role offering significant autonomy and the chance to shape the future of our mobile presence within a collaborative, agile environment.

You will be responsible for an existing cross-platform mobile wallet application. We require a developer comfortable working across different frameworks and technologies. While proficiency in JavaScript is fundamental, you must be adept at navigating and resolving issues within the native iOS and Android layers, particularly concerning plugin integrations and compatibility challenges. The ideal candidate is a problem-solver who can work independently, take full ownership of the application, manage the release process, and drive its technical evolution.

Key Responsibilities:

Application Ownership: Assume primary responsibility for the entire lifecycle of our mobile wallet application – including maintenance, debugging, performance tuning, security hardening, and new feature development.

Cross-Platform Development: Develop, test, and deploy features using modern cross-platform frameworks. Maintain and enhance the existing codebase.

Native Layer Integration & Troubleshooting: Diagnose and resolve complex issues that bridge the JavaScript layer and the native iOS (Swift/Objective-C) or Android (Kotlin/Java) environments.

Feature Implementation: Collaborate closely with product, design, and backend teams within an Agile/Scrum framework to translate requirements into robust and user-friendly mobile features.

App Store Management: Manage the entire process of building, signing, and releasing the application to the Apple App Store and Google Play Store, including handling metadata and compliance requirements.

Code Quality & Standards: Uphold high standards for code quality, readability, testing, and maintainability. Implement and champion mobile development best practices.

Technical Strategy: Contribute actively to technical discussions and decisions regarding the application's architecture, tooling, and future framework choices.

Collaboration & Communication: Clearly articulate technical concepts, progress, and challenges to both technical and non-technical stakeholders, participating effectively in Scrum events (Daily Scrum, Sprint Planning, Retrospectives etc.).

Core Skills & Experience Required:

Proven Mobile Development Experience: Demonstrable track record (typically 5+ years) building, deploying, and iterating on mobile applications available on app stores.

Strong JavaScript Proficiency: Deep understanding of modern JavaScript (ES6+) and its ecosystem (npm/yarn, build tools). TypeScript experience is a strong plus.

Cross-Platform Expertise: Significant hands-on experience with both Capacitor and React Native frameworks for building cross-platform mobile applications.

Native Bridge Proficiency: Solid understanding of how cross-platform frameworks interact with native layers. Experience debugging and developing native modules or plugins for iOS and/or Android is highly valuable.

App Store Release Management: Proven experience successfully managing the end-to-end release process for both iOS (App Store Connect) and Android (Google Play Console) applications, including build configurations, signing, and submission procedures.

Agile/Scrum Experience: Practical experience working effectively as part of an Agile or Scrum development team, participating in Daily Scrum, Sprints, Planning events and Retrospectives.

API Integration: Proven ability to integrate securely and efficiently with RESTful APIs and manage application state.

Version Control: Mastery of Git and standard branching/collaboration workflows.

Problem-Solving & Autonomy: Excellent analytical and debugging skills. Ability to independently research solutions, manage priorities, and take complete ownership of the mobile application.

Communication: Strong verbal and written communication skills in English.

Desired (Bonus) Skills:

Experience with mobile application security best practices (e.g., secure storage, certificate pinning).

Familiarity with state management libraries (e.g., Redux, Zustand, MobX).

Experience with automated testing frameworks for mobile (Unit, Integration, E2E).

Knowledge of CI/CD pipelines for mobile development (e.g., App Center, Fastlane, GitLab CI, GitHub Actions).

Previous experience in the DLT/Blockchain industry.

Why us?

What We Offer:

A central role with substantial ownership and the ability to make a direct impact.

Opportunity to work with modern mobile technologies in an agile setting.

A dynamic environment that encourages learning and technical growth.

About us

The Demo Daten GmbH is a fictional company created by Personio to familiarize our customers with our software.

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