Blockchain Development Expert for Efficient System Creation

3 days ago


Remote, Czech Republic Interexy Full time

About Interexy

We are a forward-thinking company that offers innovative solutions in the field of blockchain technology.

Job Title: Blockchain Development Expert for Efficient System Creation

Salary Range: $120,000 - $180,000 per year

About the Job

We are seeking an experienced Senior Developer to join our team and help us create a cutting-edge system for working with cryptocurrencies. The ideal candidate will have a solid understanding of blockchain technology, programming languages such as Node.js and JavaScript, and experience with frameworks like Express.js and NestJS.

The successful candidate will be responsible for designing and implementing separate self-sufficient components, participating in architectural discussions, and identifying potential technical risks. They will also need to ensure knowledge is effectively shared and maintained within the team, foster a collaborative and innovative development environment, and properly maintain documentation.

Required Skills and Qualifications

  • 4+ years of experience with server-side programming languages;
  • Solid understanding of TypeScript, JavaScript fundamentals, and internals;
  • Experience with Express, NestJS or any other similar framework;
  • Flexible approach in regards to different programming languages/technologies;
  • Proven experience using any other stack (.NET/Go/Java/C++, etc.);
  • Strong understanding of asynchronous programming, event-driven architecture, and non-blocking I/O;
  • Hands-on experience with Web3.js or Ethers.js for interacting with Ethereum or other EVM-compatible networks;
  • Understanding of smart contracts;
  • Familiarity with popular blockchains like Ethereum, Binance Smart Chain, or Layer 2 solutions;
  • Expertise in data structures, algorithms, and software design patterns;
  • Solid understanding of different software architectural patterns;
  • Experience with different RDBMSes (MySQL/PostgreSQL);
  • Experience in writing complex SQL queries and their optimization;
  • Experience with different kinds of ORMs;
  • Familiarity with Docker, containerization and orchestration tools;
  • Strong analytical skills with the ability to think critically and solve complex issues;
  • Proficiency in writing unit tests, integration tests, and end-to-end tests.

Project Overview

The project involves the development of a system for working with cryptocurrencies that will partially replace the current structure used in our services. The system will be similar to the tools used by cryptocurrency exchanges for accepting and managing balances, but with specific features for distributing outgoing flows. The integration includes connecting to existing services, such as merchant platforms and systems for handling fiat payments.

Key Responsibilities

  • Design and implement separate self-sufficient components;
  • Participate in architectural discussions and technical decision-making;
  • Identify potential technical risks and develop mitigation strategies;
  • Ensure knowledge is effectively shared and maintained within the team;
  • Foster a collaborative and innovative development environment;
  • Perform cross code-review with team members;
  • Properly maintain documentation;

Requirements

  • Node.js;
  • JavaScript;
  • Express.js;
  • NestJS;
  • Web3;
  • .NET;
  • Java;
  • Docker.


  • Remote, Czech Republic Visible Magic Full time

    We are an American IT company, Visible Magic, specializing in blockchain projects for the U.S. market. Our clients are established high-tech blockchain projects as well as innovative fintech startups.Job SummaryThis is a highly sought-after position for a seasoned Solidity developer with extensive expertise in decentralized finance (DeFi) applications, smart...


  • Remote, Czech Republic Linum Labs Full time

    We are seeking a highly skilled Backend Developer to join our team at Linum Labs. With a strong background in blockchain and Web3 technologies, you will play a key role in designing and building scalable back-end services that integrate blockchain protocols and Web3 tools.About the Role: You will be responsible for developing and maintaining APIs and...


  • Remote, Czech Republic Interexy Full time

    About the RoleAt Interexy, we're seeking a highly skilled Blockchain Development Specialist to join our team. As a key member of our development squad, you will play a crucial role in designing and implementing a system for working with cryptocurrencies that will partially replace our current infrastructure.Key Responsibilities:Develop efficient and...


  • Remote, Czech Republic Linum Labs Full time

    Job DescriptionWe are seeking a highly motivated and skilled Software Engineer to join our team at Linum Labs. This is a full-time, remote position that offers the opportunity to work on cutting-edge blockchain projects.Key Responsibilities:Design and develop scalable, secure, and efficient software solutions using Web3 technologiesCollaborate with...


  • Remote, Czech Republic Visible Magic Full time

    We are an American IT company building a variety of blockchain-based digital products for the U.S. market.Our clients are established, high-tech blockchain companies as well as innovative fintech startups.We are looking for a Senior Golang Developer who has experience in scheduling queue design, HA/HL systems, and microservices architecture.This individual...


  • Remote, Czech Republic Linum Labs Full time

    We're seeking a seasoned Solana developer with expertise in Rust programming to join our team at Linum Labs. As a key contributor, you'll play a crucial role in designing and maintaining efficient, secure, and scalable smart contracts.About the RoleThis is a fully remote position offering flexibility in work location, preferably for candidates based in South...


  • Remote, Czech Republic apreel Sp. z o.o. Full time

    We are seeking a skilled Senior Blockchain Developer to join our team at apreel Sp. z o.o.The ideal candidate will have a strong background in blockchain technologies, including Solidity, Web3.js, and Truffle. They will be responsible for developing and deploying smart contracts, as well as integrating blockchain solutions into cloud environments.The salary...


  • Remote, Czech Republic TechHunt Full time

    We are TechHunt, a cutting-edge tech company seeking an experienced Automation Tester to join our team. In this role, you will be responsible for developing and maintaining automated tests for our blockchain-based solutions.About the JobSalary: $80,000 - $110,000 per yearThis is a fantastic opportunity to work on challenging projects, collaborate with...

  • Power Engineer

    1 week ago


    Remote, Czech Republic Boneffice System Full time

    Job Description:At Boneffice System, we are seeking a highly skilled Power Engineer to join our team as an Efficiency Optimization Specialist. This is a unique opportunity to apply your expertise in power engineering, data analysis, and Python programming to drive efficiency improvements in power plant operations.Key Responsibilities:Conduct detailed...


  • Remote, Czech Republic Linum Labs Full time

    About UsLinum Labs is a cutting-edge blockchain product development company that has been at the forefront of innovation since 2016.


  • Remote, Czech Republic Visible Magic Full time

    Join a cutting-edge technology project with Visible Magic, an American IT company building blockchain-based digital products for the U.S. market.We're looking for a Senior Golang Developer to help build a high-load network job routing service from scratch and successfully roll out product releases according to the product plan.**Key...


  • Remote, Czech Republic Linum Labs Full time

    Job Description:We are seeking an experienced Solana Developer to join our team at Linum Labs.About the Role:This is a mid-senior position requiring 3-5 years of experience in developing smart contracts on the Solana blockchain.You will design, maintain, and optimize smart contracts using Rust, ensuring their performance and scalability for low-latency and...


  • Remote, Gdańsk, Czech Republic DevBrother Full time

    The DevBrother company is seeking a talented AI UX developer to join its team. As a Front-end UX developer, you will play a vital role in bridging the gap between design and development, working closely with product managers, designers, and engineers to deliver innovative and user-centric solutions.This is a unique opportunity to work on a decentralized AI...


  • Remote, Czech Republic Linum Labs Full time

    About UsLINUM LABS is a leading company in blockchain product development, with a strong focus on crafting client solutions that harness the power of blockchain and web3.Our team is dedicated to creating innovative projects that push the boundaries of what's possible. We value work-life balance and understand the importance of recharging. As a remote-first...


  • Remote, Czech Republic apreel Sp. z o.o. Full time

    Requirements for Blockchain Engineer:  Blockchain technologies (solidity, Web3.js, Truffle) Smart contract development and deployment Front end development using JavaScript frameworks Back-end development (node.js, Python, Go.) Knowledge of decentralized storage solutions/consensus algorithms Blockchain security protocols/cryptographic...


  • Remote, Czech Republic Interexy Full time

    Professional requirements 4+ years of experience with server-side JS/TS; Solid understanding of TypeScript, JavaScript fundamentals and internals; Experience with Express, NestJS or any other similar framework; Flexible approach in regards to different programming languages/technologies; Proven experience using any other stack (.NET/Go/Java/C++,...


  • Remote, Gdańsk, Czech Republic DevBrother Full time

    About the JobWe are seeking a highly skilled Senior Front-end UX Developer to join our team at DevBrother. As a key member of our cross-functional team, you will be responsible for bridging the gap between design and development, working closely with product managers, designers, and engineers to deliver innovative and user-centric solutions.Our client is...


  • Remote, Czech Republic Linum Labs Full time

    About Linum LabsLinum Labs is a pioneering company in blockchain product development, founded in 2016. Our team of entrepreneurs, engineers, and designers are dedicated to crafting innovative solutions that harness the power of blockchain and web3.We're a tight-knit team that values work-life balance and understands the importance of recharging. As a...


  • Remote, Gdynia, Czech Republic Idego Group Sp. z o.o. Full time

    We are seeking a skilled Senior React Native Developer to join our team at Idego Group Sp. z o.o.The successful candidate will play a key role in the development and maintenance of a blockchain-based investment platform for soccer players, allowing users to invest in professional players worldwide.About the ProjectOur team consists exclusively of independent...


  • Remote, Czech Republic Stakin Full time

    At Stakin, we are seeking an exceptional business development specialist to drive the adoption of Proof of Stake with crypto investors. With a strong understanding of blockchain technology and its applications, this individual will play a crucial role in identifying opportunities and developing partnerships that will accelerate our product adoption.About the...