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Our case studies show how we helped our clients take advantage of the most innovative technologies to meet their business requirements.

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An AWS cloud-native music app development
A hybrid of a social network and a music app


The original idea behind the all-new Turntable is to bring people together with music. is a social network platform that enables its users to listen to and share music with friends in real-time through a streaming service. The platform offers a virtual space for music lovers all over the world to share and discover new tunes. Besides listening and streaming functionalities, also enables user interactions, creating virtual events, and a chat feature.


AWS SAM, AWS Lambda, Amazon Kinesis, NestJS, React, Redux-Saga, Amazon RDS

A tale of a decentralized communication app development
A communication app based on local-first software principles

About the customer

Our customer is a creator of an open-source communication app inspired by the principles of local-first software. The app uses a peer-to-peer network to enable a decentralized instant messenger experience to compete with the likes of Slack, Telegram, or Discord. What’s unique about this one is the power it gives to its users - everyone is in full control and has ownership of their own data.


Electron, NodeJS, React, IPFS, OrbitDB, LibP2P, TypeScript

Anchor Leg, Discovery Workshop for a full security system for critical infrastructure
Finding innovative ways to keep facilities and establishments safe

Anchor Leg is an all-encompassing security system for critical infrastructure like airports and commercial buildings. The Anchor Leg project is currently in a very early stage of development. To start with, Rumble Fish conducted a Discovery Workshop, during which our team discussed different solutions and scenarios based on the client’s concept.


Design Thinking

The company behind DAI
The first truly decentralized stablecoin cryptocurrency on the Ethereum blockchain

MakerDAO is the company behind DAI, the first truly decentralized stablecoin cryptocurrency on the Ethereum blockchain. Dai’s value is pegged to the US Dollar and is backed by numerous collateral assets. Instead of being mediated by a central institution, its stability is maintained by a system of aligned financial incentives. The Maker Protocol also consists of MKR, a token that stakeholders use to support the system and maintain Dai. 


React, Redux, Ethereum Blockchain, Cypress

Zbay – a private inbox, wallet, and marketplace all in one
An online space controlled by the people of the Internet

Zbay is an innovative desktop app that lets users create group discussions, send each other messages and money, and exchange goods. Currently, in the beta stage of development, the open-source app is free and available for Mac, Windows, and Linux.


Zcash, Node.js,React,Redux, Storybook, Docker, AWS

VerifiID – an identity verification MVP
Developing a system to replace personal IDs for age verification

VerifiID’s goal was to develop a mobile app that could be used for age verification instead of government-issued identification such as a driving license or passport. The app doesn’t store the users’ personal data, but rather encrypts the information for easy access whenever the user needs to provide proof of age.


React, React Native, Nest, Redux-Saga, React-Admin

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