SIT Learning becomes Constructor LearningRead more

From our founding as Propulsion Academy in 2016 to our acquisition by SIT last year, today we welcome our new brand name: Constructor Learning. Constructor Learning is part of the Constructor Group, initially named Schaffhausen Institute of Technology (SIT). The organization was founded in 2019 by Dr. Serg Bell, a long-time entrepreneur and investor in technology and education. Dedicated to creating knowledge through science, education and technology, the ecosystem combines a comprehensive educational offering that spans the entire learning lifecycle, from K-12 to a private university and executive courses, next-generation research capabilities and commercial activities for technological innovation. Founded and headquartered in Schaffhausen, SIT has rapidly grown since its creation, thanks to organic growth and acquisitions. As it has become a global organization with a footprint in more than 15 countries and a worldwide network of researchers, professors, investors, clients, and alumni, the brand had to be rethought to reflect this expansion better and unify the entire ecosystem under one name: Constructor.

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Blockchain Developer Course

The Blockchain is here to stay and you need to know how it all works. In this online course, you’ll get an in-depth hands-on understanding of Blockchain and the ever-so-important Bitcoin and Ethereum cryptocurrencies.

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Program overview

The aim of this course is to provide a well-rounded and comprehensive introduction to Blockchain, digital currencies and smart contract platforms. We will start by learning about the history of money and digital currencies, and how to interact with Blockchains manually via the command line. We will cover the basic cryptography such as hash functions and discrete logarithms without which Blockchains would not be possible. With the core concepts under our belt, you’ll learn about keys, wallets, addresses and transactions, building a simple command line wallet interface along the way. Afterwards we’ll learn how Blockchains actually work to facilitate and secure transactions, what blocks are made of and how proof of work and mining work to secure the Blockchain. Finally we will cover the basics of Ethereum, Solidity and how to safely write, deploy and interact with smart contracts.

Upcoming dates

Are you interested in applying for our course? Then register here and we will inform you as soon as the next course dates are published.

What you will learn


Digital money, Cryptography & Bitcoin basics

Day 1: To understand Bitcoin, you need to understand money. In the first session we will take a look at the history of money, followed by the history of digital currencies in particular. Then we will get familiar with hands-on exercises with the Bitcoin CLI and its JSON-RPC API. Day 2: Without cryptography, there would be no Blockchain. Before we do anything with wallets or transactions, we need to understand key cryptographic concepts. We will cover hash functions, the discrete logarithm problem, public-private key cryptography and basic elliptic curve cryptography. We will use Python to apply these concepts in practice.


Blockchain through the eyes of Bitcoin

Day 3: We need to prevent anyone from double-spending, censoring, or tampering with the money supply and transactions. We will learn how the Blockchain is used to accomplish this, how mining works and what is the structure of a block. We will build a script to simulate Bitcoin mining to understand how a block is made and how proof of work works. Day 4 - Transactions: Transactions are the most important part of any Blockchain. Everything else is designed to ensure that transactions can be created, propagated on the network, validated, and finally added to the global ledger of transactions. In this lesson, we will learn the internal structure of Bitcoin transactions, transaction inputs and outputs, and use the Bitcoin CLI to explore how to make and send a Bitcoin transaction manually. Day 5 - Transactions continued, Consensus, Forks, P2P network: Following up on the previous session, we will send transactions with Python wallet. This means programmatically composing a transaction from unspent transaction outputs, signing the transaction with our private key and broadcasting it to the network. Additionally, we will look at what “consensus” means in the context of blockchain, how blockchain forks and upgrades work, the P2P network and finally bring it all together with a simplified blockchain simulation.


All about Wallets

Day 6 - Hierarchical Deterministic (HD) Wallets, Passphrases, Backups: The most important piece of user interaction with a blockchain is the wallet. We will look at how wallets are generated, backed up and restored, what mnemonic seeds are made of, and implement all this functionality with Python. Day 7 - Address encoding, Derivation paths and chaincodes, Hardened keys, Gap limits: Using what we learned in the last session, we will build a simple Python command line application that will generate a wallet for the user, show them a mnemonic sentence backup, let them import this backup to restore their wallet and generate addresses to receive bitcoins.


Ethereum I: Fundamentals, Contracts & Dev toolchain

Day 8 - Ethereum blockchain basics, Accounts, EVM, Transactions: In this lesson we will start looking at Ethereum and how the concepts we’ve learned apply to Ethereum wallets and accounts. We will understand how the Ethereum Blockchain and Ethereum transactions are different from Bitcoin and how to use Ethereum as a developer to interact with smart contracts. We will start with low level deployment with the Solidity solc compiler and geth (go-ethereum) only, without any advanced developer tools. Day 9 - Smart contract common patterns, Development toolchain, Upgradable contracts: For a newcomer, the Ethereum development toolchain can be quite complex and overwhelming. We will get started by setting up a development environment using Hardhat, an Ethereum development environment. Using our setup, we will look at smart contract deployment and how to build, deploy and maintain upgradable smart contracts.


Ethereum II: Smart Contracts, Dapps, DeFi

Day 10 - Smart Contract Security and Best Practices: Ethereum smart contracts are a complex topic. A bug in your smart contract could mean the millions of dollars that someone entrusted to your code could be lost forever. We will write a basic token contract, covering the basic features of Solidity and how to follow best practices to write safe smart contracts. Day 11 - Dapp development: The most common usage for Ethereum is the “dApp”, a “decentralized application”. It’s time to build our own. A dApp is in essence just a regular web application, that can also interact with the Ethereum blockhain. We will learn how to treat the Ethereum blockchain as our dApp backend, how to index data from it and how to interact with it and display it in a frontend web application. Day 12 - Dapps, DeFi, NFTs, Topics of choice: In our last session we will look more in depth at the current state of Ethereum, DeFi, Dapps, Decentralized Exchanges, NFTs and how it all works. Plus, we will take a look at any topics of your choice that you would like to see covered that are not part of the main curriculum, or other topics of interest that we might not have time for during the previous sessions.

Weekly schedule














Q&A Session

During these sessions, you are totally free to connect and ask any questions about the covered topics.


Learn from our instructors who are experts in their respective fields and get introduced to new topics during live lectures.


Work on a set of interesting and challenging exercises related to the topics covered in the previous lesson.

Earn a Certificate of Accomplishment

Share your Certificate on social networks, printed resumes, CVs or other documents. Boost your career with the new skills that you gained.


Upcoming events

Attend one of our events. Discover our upcoming workshops, info sessions, final presentations and webinars on trending topics.

  • Data Analytics Workshop

    08. Dec 22, 05:00 PM - 07:00 PM GMT+1

    Location: Online via Zoom

    Join Dipanjan on December 8th from 5 - 7 PM and get an introduction to data analytics. Dipanjan is our lead data science consultant & instructor, leading advanced analytics efforts around Computer Vision, Natural Language Processing and Deep Learning. Dipanjan will lead you through python and data processing basics, talk about framing data science problems, and briefly discuss how to analyze and visualize unique patterns. At the end of the workshop, you will create a model that can predict housing prices using machine learning. If you are interested in data science and data science-related topics, this event is for you. Register today to save your seat.


  • UX/UI workshop with Kenji

    18. Jan 23, 05:00 PM - 06:30 PM GMT+1

    Location: Online via Zoom

    Join Kenji on Wednesday, January 18th, 2023, from 5 - 6:30 PM and get an introduction to prototyping in Figma. Kenji Nguyen is a UX designer at Ginetta, and an expert at designing business applications, custom websites, and mobile apps for leading corporations, ambitious SMEs, and innovative startups. Kenji will be hosting an interactive workshop on prototyping in Figma. This will include wireframing for the initial stages of UX and prototyping in Figma to give a basis for UI. If UX/UI design is something you are interested in exploring further, then this is the perfect opportunity for you! Register today to save your seat.


Empty room with chairs

Application process and prerequisites

Basic programming knowledge required (Python as well as familiarity with the command line).
Simply apply to the program here.


How is the day by day schedule?

During every session you would be introduced to a new topic for around 45 - 60 mins. For the rest of the 2 hours, you will complete guided exercises with the help of our teachers and teaching assistants.

How is this course different from other self-paced online courses?

Most self-paced courses are a good place to start, however, they do not go into the depths of problems early-stage programmers face in their day-to-day coding life nor do you get help when it really matters. That’s not the Constructor Learning philosophy. We’re here for you. Each and every learner gets the attention they deserve from our experienced staff of instructors and mentors.

Is there an interview selection for this course?

No, as long as you meet the listed prerequisites. The main goal is to help you take your first step in the world of Blockchain.

Your instructors

Team Member

Tom Vrba


He started working with Ethereum in 2016 as part of his Master's thesis on mechanism design, learning how to work with smart contracts along the way and being a part of developing a non-fungible token before the ERC-20 token standard (think Cryptokitties and digital art) emerged. After Constructor Learning in 2018, he joined Shift Crypto to work mainly with Bitcoin and on the BitBox02 hardware wallet, which to date is his favorite hardware wallet. Since 2020 he's been working again with Ethereum, DeFi, NFTs and smart contracts and working as an independent contractor, mentor and educator.

Read more about Constructor Learning in our Blog

Read the latest news about Constructor Learning and get informed about all things around Programming and Data Science in Switzerland and Germany.


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