Hey! I'm

Rani Kais

About me

Rani Kais

Fullstack Engineer

Email

I’m a passionate Software Developer with a solid foundation in Electronics Engineering. My journey began with a fascination for how computers work, leading me to blend the structured world of engineering with the creative and ever-evolving field of software development. I thrive on building robust backend and frontend applications that solve real-world problems, streamline processes, and create engaging user experiences.

What others say about me:

Proactive • Feedback-oriented • Challenge-Driven
Efficient Preparation • Independent Worker
Innovative Solutions • Commitment to Excellence

My Journey

Federal Ministry of Defence,

Vienna AT

July 2024 – Present

Fullstack Engineer

Technical lead for the central training and administration system. Coordinated a team of developers and ensured the timely delivery of key project milestones, with a focus on process digitalization, system integration, and continuous platform improvement.
Developed a large-scale digitization platform covering all Austrian conscripts (ages 16–55).
Responsible for regular project planning, sprint efficiency improvements, and team coordination.
Modernization and ongoing development of the „bundesheeronline“ platform – from interactive form creation to backend integration of complex workflows.
Award ????: Project „bundesheeronline“ recognized at the Austrian Public Administration Award 2025 (category: Innovative Service Design and Digital Services).

PAYUCA GmbH, Vienna AT

April 2021 – April 2024

Backend and Embedded Systems Engineer: GitHub Profile

Led the development of the third generation of IoT hardware (MQTT integration, latency optimization) and deployed to 100+ devices.
Maintained and improved the second hardware generation, increasing device reliability and extending lifespan by ~25 %.
Developed internal tools (e.g. RF diagnostic tool) for optimizing device placement and reducing operating costs.
Enhanced and expanded the Payuca app, increasing active users by ~10 % monthly to over 100,000 users.
Migrated from serverless DynamoDB structures to a centralized PostgreSQL database, simplifying business processes and improving data integrity.
Developed automated testing solutions for NFC and BLE validation, as well as OTA firmware updates (reducing update duration by over 90 %).

Die Kinderfreunde, Vienna AT

July 2016 – March 2017

Community Service:

Delivery of furniture to various kindergartens.
Repair/Refurbishment of furniture.

Projects

Sushi O´Clock

Mobile Application (iOS & Android) – Download now!

Note: This project is no longer available, as the associated restaurant has closed. The app and its development remain documented as a reference for my technical work.

Cross-platform development: Consistent and appealing order app for iOS and Android using React Native.
Cloud-based backend: AWS Amplify integration for scalable and reliable backend services.
Database management: Utilized DynamoDB for efficient handling and rapid scaling of order data.
User-friendly design: Focus on an intuitive interface and positive user experience.
Custom features: Implemented unique functionalities such as pop-up cart, quantity modal, and real-time error notifications via Telegram API.
Project insights: Emphasis on clear goals, time management, and developing creative solutions.
Self-initiated ideas: Ongoing improvement through innovation and a strong focus on usability.