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Smart Contract Backend Engineer (External)

Remote: 
Full Remote
Contract: 
Full time
Experience: 
Mid-level (2-5 years)
Work from: 
Poland, Portugal, Denmark, United Kingdom, Germany, California (USA), Florida (USA), Illinois (USA), New York (USA), United States

Offer summary

Qualifications:

2-4 years of experience in blockchain development., Proficiency in Solidity and EVM familiarity., Experience with smart contract testing tools., Strong problem-solving skills..

Key responsabilities:

  • Design, develop, and deploy smart contracts.
  • Collaborate with engineers to integrate contracts.
  • Perform testing, debugging, and auditing.
  • Contribute to documentation of smart contracts.

Serotonin logo
Serotonin Marketing & Advertising Startup https://serotonin.co/
11 - 50 Employees
About Serotonin
Serotonin is a breakthrough marketing firm and product studio for transformative technologies. We bring breakthrough technologies to market and builds ecosystems around them. With a team of former executives from ConsenSys, Chainlink, Bridgewater Associates, General Assembly, and more, Serotonin partners with top businesses and entrepreneurs on brand positioning, business partnerships, media relations, content, product marketing, and go-to-market strategy. We combine expertise in financial services, digital assets, and decentralized tech with data-driven methodology to ensure our partners’ marketing and PR is executed flawlessly, driving step-function growth.
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Job description

Our client is a cutting-edge company focused on revolutionizing global payments by building a scalable, zero-fee payment platform secured by Bitcoin. Their innovative technology enables fast, secure, and cost-effective digital transactions, with the potential to reshape how the world interacts with money. We are looking for a talented Smart Contract Engineer to join their growing team.

This role offers the opportunity to work on innovative blockchain technologies and contribute to the development of secure, efficient, and reliable smart contracts that power our payment ecosystem.

If you’re excited about joining a dynamic and purpose-driven environment where your ideas can shape the future, we’d love to meet you. Together, we can redefine what’s possible in the world of digital connectivity and data management.

Key Responsibilities:
  • Design, develop, and deploy smart contracts for the platform using Solidity or other relevant programming languages.
  • Implement secure and efficient code while adhering to best practices for smart contract development.
  • Collaborate with backend and frontend engineers to integrate smart contracts into the platform.
  • Perform rigorous testing, debugging, and auditing of smart contracts to ensure security and reliability.
  • Stay informed about the latest developments in blockchain and smart contract technologies.
  • Contribute to the documentation of smart contract architecture and processes.
  • Participate in code reviews to maintain high-quality standards across the codebase.

    • Key Requirements:
  • 2–4 years of experience in blockchain development, with a strong focus on smart contracts.
  • Proficiency in Solidity and familiarity with Ethereum Virtual Machine (EVM).
  • Understanding of security considerations and best practices for smart contract development.
  • Experience with tools such as Hardhat, Truffle, or Foundry for development and testing.
  • Familiarity with Web3.js, Ethers.js, or similar libraries for interacting with blockchain networks.
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and collaboration skills.

    • Preferred Qualifications
  • Experience with Bitcoin Layer 2 solutions or similar blockchain ecosystems.
  • Contributions to open-source blockchain or smart contract projects.
  • Understanding of financial systems, payment protocols, or decentralized finance (DeFi).

    • What We Offer
  • Competitive salary and equity options.
  • Flexible working hours and remote-friendly environment.
  • The chance to work on cutting-edge technology with a talented, passionate team.
  • Opportunities for professional growth and learning.

    • Required profile

    Experience

    Level of experience: Mid-level (2-5 years)
    Industry :
    Marketing & Advertising
    Spoken language(s):
    English
    Check out the description to know which languages are mandatory.

    Hard Skills

    Solidity (Programming Language)Truffle (Software)Foundry MariDecentralized Finance (DeFi)

    Other Skills

    • Detail Oriented
    • Collaboration
    • Communication
    • Problem Solving
    Are you interested?

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