Our Services

About Us

We have more than 20 years of experience building and reviewing security applications, and have active in the cryptocurrency field. We have designed new bitcoin-related cryptocurrency protocols and discovered and reported various security vulnerabilities.

Our software development service includes helping customers define product specifications, designing UI & UX design, integrating applications, QA, deploying the product to a hybrid cloud environment, and continued support.


Why CoinFabrik?

Unrivaled Technical Expertise in Cryptocurrencies

Our blog is full of knowledgeable articles by our team of experts in the field. Our reputation is based on our work for many top blockchain influencers.

Quick Responders

We understand the time pressures of technology implementations and software development. Our team can efficiently integrate with yours to reach your goals.

Customizable Solutions

The market does not offer software to fit every business’ needs. We can work with you to find the best way to do what you need done. Our thorough knowledge of currently available technology allows us to write your solution on top of existing software when designing something from scratch is unnecessary.

Security Experts

CoinFabrik's founders come from the software security industry. All team members are familiar with security threats and know how to develop secure Smart Contracts and secure code in general. We take pride in our carefully written code.

Cryptocurrency Supporters

We have been playing with and working on blockchain technologies from the early stages. We use and accept Bitcoins. We believe in blockchain technology’s capacity to disrupt Fintech.

Case Studies

Jaxx Wallet: Multi-cryptocurrency wallet back-end and infrastructure

Jaxx wallet is a multi-cryptocurrency wallet which is able to send and receive currencies, and convert them using ShapeShift integration.
CoinFabrik built back-end infrastructure for over 10 different cryptocurrencies including complex ones such as Monero and Zcash. We also integrated Jaxx with Ethereum smart contracts.

Jaxx Multi-cryptocurrency wallet

Rootstock: Implement Merge-mining

RSK is an open-source smart contract platform with a 2-way peg to Bitcoin. The RSK network uses PoW rewards like Bitcoin does.
CoinFabrik modified Bitcoin Core to add opcodes for side chains, adapted pool servers for merge mining, and implemented the BIP-R10 Bitcoin improvement proposal with segregated witness support (segwit).

RSK RootStock

TrustStamp: Identity verification using smart contracts

CoinFabrik developed a smart contract which stores user identity information. This information is can be viewed in the contract but can only be altered by TrustStamp.

TrustStamp Identity Verification

Wayniloans: Peer-to-peer loans

Taking out loans in South America is difficult and many people are outside of the financial system. Wayni Loans makes it easy to get a loan by using a social network based system to rate borrowers, and bitcoin to bypass local currency regulations.
CoinFabrik wrote a back end that interacts with a Bitcoin node to perform transactions. We built a database to optimize transactions and reduce fees paid by borrowers and lenders.

Wayniloans peer-to-peer loans

Sig3: Anti-fraud detection using multi-signature wallets

Multi-signature technology allows Bitcoin / Ethereum wallets to require more than one signature to approve transactions.
Using this technology Sig3 is registered as a cosigner in a multi-signature wallet and automatically cosigns the transaction based on the user’s security policies. However, if a transaction violates a policy, Sig3 withholds its signature and notifies the user of the policy violation via email or text message.
CoinFabrik developed both the front end and the back end.

Sig3 Multi-signature

CryptoKit: Support for elliptic curve on OpenPGPJS

CryptoKit wanted to use Bitcoin and Ethereum keys for secure messages, but OpenPGP did not support the required elliptic curves (RFC 6637).
CoinFabrik added this support and created a pull request to add it to the OpenPGPJS project.

The Team

Sergio Lerner

Sergio Lerner

Sergio has been working in information security since 1994. He is currently active in the cryptocurrency community and has discovered several vulnerabilities and proposed over 50 design improvements, some of which have become part of bitcoin and is one of the creators of RootStock (RSK), the most promising smart contract platform. He also blogs frequently at Bitslog.

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Pablo Yabo

Pablo Yabo

Pablo began working in the computer security field in 1997. Since then he has been responsible for designing a variety of security-related products and leading product development teams, first at Core Security Technologies and later at Nektra Advanced Computing which he co-founded with Sebastian Raul Wain in 2003.

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Sebastian Raul Wain

Sebastian Raul Wain

Sebastian started out as a white hat hacker in 1995. He is currently focused on software architecture and systems integration and specializes in guiding customers through the process of honing their ideas into a finished design. He continuously surveys industry trends for exciting developments.

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