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Blockchain and smart contract technology services

Our Team

ray@4x

Raymond Pulver

Lead Engineer

Co-Founder and CTO of IDEX, a top-5 in volume decentralized exchange for Ethereum. EthNewYork and EthBoston 2019 finalists.

dillon@4x

Dillon Kellar

Senior Engineer

Experienced Solidity and EVM developer. Finalist of EthNewYork 2019 for exeDAO. Creator and maintainer of eth-signal and eth-treekem encryption libraries.

andy@4x

Andy Zhu

Project Manager

VP Growth at NinjaRMM, an enterprise IT-management SaaS based in San Francisco. Built marketing team and grew revenue 10x. Led NiftyNinja project for 0x hackathon 2019.

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Jaime Iglesias Botas

Staff Engineer

Experienced in Java, Solidity, Javascript, node.js and react.js. Bachelor's in Computer Engineering from University of A Coruña.

ray@4x

Raymond Pulver

Lead Engineer

Co-Founder and CTO of IDEX, a top-5 in volume decentralized exchange for Ethereum. EthNewYork and EthBoston 2019 finalists. Masters in Computer Science from University of Rhode Island.

dillon@4x

Dillon Kellar

Senior Engineer

Experienced Solidity and EVM developer. Finalist of EthNewYork 2019 for exeDAO. Creator and maintainer of eth-signal and eth-treekem encryption libraries.

andy@4x

Andy Zhu

Project Manager

VP Growth at NinjaRMM, an enterprise IT-management SaaS based in San Francisco. Built marketing team and grew revenue 10x. Led NiftyNinja project for 0x hackathon 2019.

circle-cropped

Jaime Iglesias Botas

Staff Engineer

Experienced in Java, Solidity, Javascript, node.js and react.js. Bachelor's in Computer Engineering from University of A Coruña.

Our Services

Systems Design

User-centric smart contract design. If you build it for the users, they will come.

Smart Contract Implementation

Proven experience for Ethereum blockchain with multiple live projects.

Security Auditing

Identify functional and security-related issues in smart contracts.

Open Source Projects

emasm

EthBoston 2019 finalist. Allows you to pack large amounts of data into as small of a call as possible. Inspired by Huff from Aztec Protocol.
Bitbucket

exeDAO

EthNewYork 2019 finalist. exeDAO allows for secure execution of near-arbitrary code for ethereum smart contracts.
Medium

Eth-signal

A Javascript implementation of the Signal Protocol using secp256k1 keypairs. Can be used on Node.js or in a browser using webpack.
GitHub

Eth-treekem

Ethereum implemention of TreeKEM, asynchronous decentralized key management for large dynamic groups.
GitHub

NiftyNinja

Integrated 0x protocol with discord bot library to provide non-fungible token trading through chat.
Medium

Project BNS

Bind usernames to ethereum public addresses via an ethereum smart contract. Fast registrations.
Medium