Anthony Sistilli, Web Development Developer in Toronto, ON, Canada
Anthony Sistilli

Web Development Developer in Toronto, ON, Canada

Member since March 13, 2017
With over five years of industry experience, Anthony is a senior front-end developer who specializes in all things React! He started his career in Silicon Valley, working as an engineer for Intuit, and moved back to Toronto to be closer to family. Since then, Anthony has contributed to multiple projects in and outside of Toptal—and led his own development team on siloed products that have reached tens of thousands of end-users.
Anthony is now available for hire


  • Alteryx
    Pytest, Enzyme, Jest, Flask, Python, Material-UI, MobX, Redux, React
  • [Stealth]
    Couchbase, Express.js, Auth, Firebase, Postman, Docker, Swagger, Enzyme, Jest...
  • Etikfin
    JavaScript, ManyChat, AWS Lambda



Toronto, ON, Canada



Preferred Environment

PyCharm, Atom, MacOS, Python

The most amazing...

...thing I've done was for a hackathon where I created a genetic algorithm that was able to learn 3D Tetris from scratch and get extremely good at it.


  • Front-end Developer

    2019 - 2019
    • Worked primarily as a frontend React engineer writing production-ready code on a daily basis.
    • Created production-ready responsive front-end components using React and a mix of state tools such as MobX and Redux.
    • Wrote high coverage unit tests with tools like Jest and Enzyme, and preformed refactor on existing code to increase readability, maintainability, and efficiency.
    • Worked with and reviewed code from other senior-level engineers, and helped with QAing and debugging code when needed.
    • Worked on four different repositories (two dealt with front-end React code and the other two handled back-end Python work).
    Technologies: Pytest, Enzyme, Jest, Flask, Python, Material-UI, MobX, Redux, React
  • Software Engineer

    2018 - 2019
    • Used TypeScript React to build a comprehensive web app using React's context API.
    • Built constructive unit tests using Jest and Enzyme.
    • Constructed a scalable back-end to handle client-side requests and data storage with Couchbase as well as pulling data from a Swagger graph API.
    • Integrated Google Auth to sign users in and out.
    • Created a state trace where an administrator would be able to go through all the users who've taken actions while on the platform.
    Technologies: Couchbase, Express.js, Auth, Firebase, Postman, Docker, Swagger, Enzyme, Jest, React, TypeScript
  • Software Consultant

    2018 - 2019
    • Collaborated with the client to design a chatbot architecture to meet their design requirements.
    • Walked the client through how to set up ManyChat with dynamic API requests.
    • Used AWS Lambda functions to support dynamic information requests.
    Technologies: JavaScript, ManyChat, AWS Lambda
  • Freelance Back-end Web Developer

    2018 - 2018
    Civil Link (via Toptal)
    • Architected, designed, and built a back-end infrastructure to support an already existing web app.
    • Authenticated and stored basic user data with Firebase Auth.
    • Added real-time data updating functionalities with Firebase Cloud Function.
    • Stored important information as a document collection store via Firestore.
    Technologies: Firebase Cloud Functions, Cloud Firestore, Auth, Firebase, JavaScript
  • Freelance Web Developer

    2018 - 2018
    V.S. (via Toptal)
    • Built a web application for internal use using React along with a Twilio integration.
    Technologies: CSS, HTML, Twilio, React
  • Founder | CEO

    2017 - 2018
    Sora Web Solutions
    • Spearheaded digital marketing campaigns for both online and brick and mortar clients.
    • Designed and built various websites like WordPress and React (from scratch) for a variety of clients ranging from eCommerce to manual labor companies.
    Technologies: Drip CRM, Zapier, Mailchimp, CSS, HTML, React, Facebook Ads, WordPress, ManyChat
  • Software Engineer

    2017 - 2017
    • Worked as a full-time back-end engineer.
    • Revamped the old data base systems into new ones.
    • Contributed to changing how the release engineering cycle worked.
    Technologies: Karate API Testing, Unix, Cassandra, Spring, Java, Python
  • Advanced Technology Consultant

    2016 - 2017
    Parent Powered
    • Created a virtual chatroom for multiple SMS users who don't have access to each other's phone number to promote anonymous collaboration and communication; used Flask and Python.
    • Developed and tested a responsive chatbot that would respond to users via SMS with intelligent responses that were trained with previous conversations; used Dialogflow.
    • Case-tested the chatbot by writing Python scripts that would hit Dialogflow's endpoint and simulate a user conversation.
    • Supported the chatbot SMS interactions by using Twilio's integration service with Dialogflow.
    Technologies: Natural Language Processing (NLP), Google API, Flask, Twilio, Dialogflow, Python
  • Software Engineer (Innovation and Advanced Technology Team)

    2016 - 2016
    • Worked closely with acclaimed individuals on topics such as deep learning, machine learning, and big data.
    • Focused on how to use customer tax data with deep learning to improve user experience.
    • Dove head-first into application development involving TensorFlow, PySpark, and Hadoop.
    • Participated in a company hackathon and was ranked one of the top five teams to compete.
    • Learned how to innovate in a lean way, design for delight, and present technical knowledge in multiple lab meetings to over 30 participants.
    Technologies: Servers, SQL, Hibernate Query Language (HQL), Apache Hive, Apache Spark, PySpark, TensorFlow, Python
  • Research Assistant

    2015 - 2016
    Ryerson University
    • Worked closely with Dr. Cherie Ding and a PhD student to create a Twitter-based recommender system. I specifically focused on the gathering, storing, and the application of Twitter data.
    • Created a program that pulled 3.5 million tweets from new users every day, with zero upkeep (using Scala). The data was stored in a database for later use, and it would automatically be updated as tweets were pulled in.
    • Automatized the system and error-tested it to make sure the data was unique and supported.
    Technologies: SQL, Java, Scala, Apache Spark, Twitter API



    Geneural is a self-made genetic algorithm that learns how to play 3D Tetris from scratch and master it. The results per generation are plotted and clickable for a playthrough from the best chromosome in the generation.

    This algorithm was created using Python and Numpy. No additional machine learning libraries were used as the algorithm was created from scratch by me.

    My team and I won third place in RUHacks, a coding competition, for this project.

    I specifically designed the entire genetic algorithm, code, and concept.

  • Twitter Data Mining: A Guide to Big Data Analytics Using Python (Publication)
    Twitter is a goldmine of data. Unlike other social platforms, almost every user’s tweets are completely public and pullable. In this tutorial, Toptal Freelance Software Engineer Anthony Sistilli will be exploring how you can use Python, the Twitter API, and data mining techniques to gather useful data.


  • Languages

    JavaScript, Python, TypeScript, Java, PHP, Scala, SQL, Hibernate Query Language (HQL), HTML, CSS
  • Frameworks

    Redux, BotEngine, CodeIgniter, Flask, Apache Spark, Spring, Jest, Swagger, Express.js, Material-UI
  • Libraries/APIs

    Node.js, React, Firebase Web SDK, Twitter API, Redux-saga, React Redux, Instagram API, Google APIs, Facebook API, Twilio API, Google API, TensorFlow, PySpark, Auth, MobX
  • Tools

    Dialogflow, ManyChat, IntelliJ IDEA, Postman, Firebase Authentication, PyCharm, Karate API Testing, Mailchimp, Zapier, Drip CRM, Pytest, Atom
  • Platforms

    Chatfuel, Twilio, Firebase, Docker, AWS Lambda, MacOS, Unix, WordPress, Arduino
  • Storage

    Cloud Firestore, Firebase Realtime Database, Apache Hive, Cassandra, Couchbase, MySQL
  • Other

    Chatbots, Live Chat, Web Development, Artificial Intelligence (AI), Web Scraping, Slate.js, Firebase Cloud Functions, Natural Language Processing (NLP), Servers, Enzyme, Facebook Ads
  • Paradigms



  • Bachelor of Engineering degree in Computer Engineering
    2013 - 2017
    Ryerson University - Toronto, Canada

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