toptal.com
Contact us: +1.888.867.7001
Emilio Almansi, Bitcoin Developer in Berlin, Germany
Emilio Almansi

Bitcoin Developer in Berlin, Germany

Member since December 20, 2017
Emilio has a broad skill set ranging from full-stack development and distributed computing to blockchain technologies. He has had extensive experience with the Java and Node.js ecosystems as a senior software engineer at Yours Inc, Google, and the Max Planck Institute of Informatics, as well as big data startup, Trifacta. He has strong analytical skills and takes great care in communicating with clients to find the right solution for their needs.
Emilio is now available for hire
Hire Emilio

Portfolio

  • Yours Inc.
    Amazon Web Services (AWS), Lerna, Docker, Bitcoin, Blockchain, Rollup.js...
  • Zeppelin Solutions
    React, JavaScript, Node.js, Ethereum, Solidity
  • Trifacta Inc.
    BigQuery, Google, Google Cloud Storage, Docker, C++, Python, Java, Node.js

Experience

Location

Berlin, Germany

Availability

Part-time

Preferred Environment

Git, IntelliJ, Visual Studio Code (VS Code), Linux

The most amazing...

...lines of code I've written reduced the largest performance bottleneck and distributed the profiling algorithm by a factor of 20 in both time and memory use.

Employment

  • Sr. Software Engineer

    2018 - 2018
    Yours Inc.
    • Co-lead the design and implementation of Money Button [1], a user-friendly cryptocurrency wallet and a digital currency payments system that leverages blockchain technology to simplify the development of e-commerce websites and content applications.
    • Developed and maintained Yours.org [2], a content platform where users can earn money by creating and discovering good content. Built several key features like content search and a notifications system.
    • Implemented Money Button as a microservice-based architecture including a web application, a REST API, a blockchain monitor, among other services.
    • Participated in the hiring process by searching for talented candidates and performing interviews, often involving live coding exercises.
    • Organized a multi-project repository scheme based on Lerna, allowing several open- and closed-source projects to interact effortlessly during development.
    • Implemented Money Button's authorization and authentication system based on the OAuth 2.0 Authorization Framework.
    Technologies: Amazon Web Services (AWS), Lerna, Docker, Bitcoin, Blockchain, Rollup.js, Bookshelf.js, Next.js, React, Express.js, Node.js, PostgreSQL

  • Software Developer (Consultant)

    2018 - 2018
    Zeppelin Solutions
    • Developed an automatic documentation generation tool for Solidity, the programming language for writing smart contracts on the Ethereum platform.
    • Created the API documentation website for OpenZeppelin - the open-source framework to build secure smart contracts by Zeppelin.
    • Contributed to the Solidity compiler open-source project on Github.
    Technologies: React, JavaScript, Node.js, Ethereum, Solidity

  • Associate Software Engineer

    2016 - 2017
    Trifacta Inc.
    • Wrote and optimized algorithms for computing data transformation primitives on GCP’s Dataflow engine for parallel data processing.
    • Developed a time scheduling microservice based on Java Quartz, designed for high availability and resilience.
    • Integrated Google’s BigQuery large-scale data warehouse into the product, spanning multiple back-end services (Node.js, Java, Python) and the platform’s web application interface (front-end and back-end).
    Technologies: BigQuery, Google, Google Cloud Storage, Docker, C++, Python, Java, Node.js

  • Research Intern

    2015 - 2016
    Max Planck Institute for Informatics
    • Built a Java tool for exporting Wikipedia’s full edit history XML dumps (+10TB uncompressed) into Avro format.
    • Extracted the full link structure of all +37M pages and +640M revisions in Wikipedia’s edit history.
    • Wrote a data processing pipeline for Apache Spark SQL engine to compute Jaccard-type semantic relatedness scores between pages and various page popularity metrics.
    Technologies: Parquet, Apache Avro, Apache Pig, Spark SQL, MapReduce, HDFS, Scala, Java

  • Software Engineering Intern

    2015 - 2015
    Google
    • Wrote a FlumeJava distributed processing pipeline for detecting book series from messy or incomplete book metadata.
    • Set up automatic deployment for the developed pipeline using Borg for daily extraction.
    • Executed extraction on data provided by major book partners yielding +1500 book series.
    Technologies: Borg, FlumeJava, Guice, Java, Blaze

  • Freelance Software Engineer

    2013 - 2014
    Data Extraction Freelance Projects
    • Created a stand-alone tool for continuous, high-performance web data extraction jobs. Written in PHP and multi-cURL for leveraging multiple asynchronous requests, the tool harvested millions of entries per day producing a MySQL database as output.
    • Developed multiple customized web crawlers using Python's Scrapy Framework, later deployed to the cloud for autonomous periodic execution.
    Technologies: Scrapy, Python, MySQL, PHP

  • Web Developer

    2012 - 2012
    Artfos SA
    • Developed and maintained CRUD applications with a standardized development process.
    • Developed the back-end using PHP, Yii Framework, MySQL. Front-end development using JavaScript, HTML, LESS.
    • Launched a PHP continuous integration server based on JenkinsCI.
    • Wrote automated end-to-end tests with Selenium IDE.
    Technologies: Jenkins, JavaScript, Less, HTML, MySQL, Yii, PHP

Experience

  • [Open-Source] BchAddr.js: Bitcoin Cash General Purpose Address Translation for Node.js and Web Browsers
    https://www.npmjs.com/package/bchaddrjs

    Plug & Play JavaScript library for all Bitcoin Cash address format translation needs. Easy-to-use, thoroughly tested, and feature complete. Approximately 4000 weekly downloads on the npm registry [1].

    [1] https://www.npmjs.com/package/bchaddrjs

  • [Open-Source] CashAddr.js: The New Bitcoin Cash Address Format for Node.js and Web Browsers
    https://www.npmjs.com/package/cashaddrjs

    Isomorphic JavaScript implementation of the new Bitcoin Cash address format specification, for Node.js and web browsers. Approximately 5000 weekly downloads on the npm registry [1].

    [1] https://www.npmjs.com/package/cashaddrjs

  • [Open-Source] solidity-docgen: Solidity Documentation Generator.
    https://github.com/OpenZeppelin/solidity-docgen

    Simple documentation generator for Solidity - the programming language for writing smart contracts on the Ethereum platform - currently used for OpenZeppelin. Builds a fully customizable Docusaurus-powered website containing your API and any additional informational documents you may choose to add.

  • [Open-Source] ELEN: Efficient Lexicographic Encoding of Numbers.
    https://github.com/ealmansi/elen

    ELEN provides a way of textually representing numbers such that their natural order is preserved as a lexicographical order (i.e. alphabetical order) of their representations. Based on the homonymous paper by Peter Seymour [1].

    [1] https://github.com/ealmansi/elen/blob/master/resources/elen.pdf

  • [Open-Source] ErcyBot: Real-time Feed of Ethereum ERC20 Token Transfers in Your Slack Workspace
    https://github.com/ealmansi/ercy-bot/

    ErcyBot is a Slack bot which provides a real-time feed of Ethereum ERC20 token transfers in your Slack workspace.

    The bot listens to the Ethereum Blockchain for incoming events occurring in one of the contracts of interest and, upon detecting a token transfer, sends a message to the configured Slack channel.

  • Google Cloud Dataprep
    https://cloud.google.com/dataprep/

    Google Cloud Dataprep, born from a collaboration between Trifacta and Google, is an intelligent data service for visually exploring, cleaning, and preparing structured and unstructured data for analysis.

    At Trifacta, I worked as part of the team involved in rearchitechting Trifacta's data preparation product into a microservice based architecture fit for integration into the Google Cloud Platform.

    My contributions to this project included implementing and optimizing data transformation operations as data-parallel primitives on Dataflow, Google Cloud's distributed computing engine. I was also responsible for the integration of BigQuery - Google's serverless, highly scalable, low cost enterprise data warehouse - as a data source on Dataprep.

  • Robotics for High School Students

    As part of the Computer Science popularization team at my university, I developed a web-based IDE à la MIT Scratch for programming and simulating an Arduino-based, two-wheel robot.

    The application has been used to introduce programming and robotics concepts to over a thousand high-school students, and is still in use today. It also has a pretty slick user interface: https://goo.gl/BaXxbV.

  • Scraple: High-Performance Web Data Extraction
    https://github.com/ealmansi/scraple

    Highly configurable web data extraction tool, built in PHP and using multi-cURL for leveraging concurrent asynchronous requests. Harvesting millions of entries per day, the tool produced a MySQL database as output, yielding an easily browsable representation of freely available data on the web.

Skills

  • Languages

    Java, JavaScript, Python, C++, SQL, Less, Scala, C, PHP, Sass, CSS, HTML, Bash, Haskell, Solidity

  • Tools

    Git, IntelliJ, Jenkins, BigQuery, Spark SQL, Gulp, Bower, NPM, Apache Avro, LaTeX, Mocha, MATLAB, Lerna, Rollup, Webpack, Docker Compose

  • Platforms

    Bitcoin Cash, Blockchain, Linux, Visual Studio Code (VS Code), Apache Pig, Amazon Web Services (AWS), Heroku, Docker, Ethereum

  • Other

    Algorithms, Bitcoin, API Design, Blaze, FlumeJava, Borg, Google, Integration Testing, Parquet, Agile Sprints, Ethereum Smart Contracts, Google BigQuery, Data Extraction, Slackbot

  • Frameworks

    Express.js, Yii, Guice, Bootstrap, Redux, Truffle, Scrapy, Spring, OAuth 2, Next.js

  • Libraries/APIs

    React, Node.js, Rollup.js, Standard Template Library (STL), Bookshelf.js

  • Paradigms

    Functional Programming, Object-oriented Programming (OOP), Prototype-based OOP, Unit Testing, Scrum, MapReduce, E2E Testing, Testing, Microservices Architecture

  • Storage

    MySQL, Google Cloud Storage, HDFS, PostgreSQL, Redis

Education

  • Master's Degree in Computer Science
    2012 - 2019
    University of Buenos Aires - Buenos Aires, Argentina
  • Bachelor's Degree in Computer Science
    2012 - 2017
    University of Buenos Aires - Buenos Aires, Argentina

Certifications

  • Java SE 7 Programmer I
    MARCH 2012 - PRESENT
    Oracle

To view more profiles

Join Toptal
Share it with others
Hire the top 3% of freelance developers TM