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On behalf of our Client from Canada, Mobilunity is looking for a Blockchain Developer.
Our client is an innovative technology startup building a next-generation platform that combines AI, IoT, and blockchain technologies to create secure, scalable, and user-centric digital solutions. The platform integrates connected devices, intelligent services, and blockchain-powered incentive mechanisms to deliver engaging user experiences while maintaining a strong focus on security, privacy, and scalability.
The team is developing a modern ecosystem where blockchain plays a key role in enabling transparent reward systems, secure transactions, and seamless integrations across multiple products and services. This is an opportunity to contribute to the architecture and development of production-grade Web3 solutions within a collaborative, cross-functional engineering environment.
Responsibilities:
- Design and develop blockchain-based reward and incentive systems.
- Build, test, deploy, and maintain secure smart contracts.
- Develop reward issuance and redemption workflows.
- Integrate blockchain services with backend systems, applications, AI services, and connected devices.
- Implement wallet integration, transaction processing, secure key management, and fraud prevention mechanisms.
- Design privacy-focused blockchain solutions that minimize exposure of sensitive information on-chain.
- Develop APIs and smart contract interfaces for third-party integrations.
- Monitor blockchain infrastructure and contribute to system architecture, scalability, performance, and security.
- Collaborate closely with Backend, AI, IoT, Product, QA, and Security teams.
Requirements:
- 3+ years of commercial experience in blockchain development.
- Strong experience with Solidity and EVM-compatible blockchains (Ethereum, Base, Polygon, Arbitrum, Optimism, etc.).
- Experience designing, deploying, and maintaining production-ready smart contracts.
- Solid understanding of blockchain architecture, distributed ledger technologies, consensus mechanisms, and transaction validation.
- Experience with wallet integration, account abstraction, or embedded wallet solutions.
- Knowledge of blockchain security best practices, key management, multisignature wallets, and access control.
- Understanding of token-based reward systems and tokenomics.
- Familiarity with Layer 2 networks and gas optimization techniques.
- Understanding of privacy, KYC/AML, and regulatory considerations related to blockchain applications.
- Experience collaborating with backend and frontend engineering teams.
- Good written and spoken English.
Nice-to-have:
- Experience integrating blockchain solutions with AI, IoT, or distributed backend platforms.
- Experience with Web3 libraries such as ethers.js, web3.js, or wagmi.
- Experience with stablecoin payments or blockchain payment infrastructure.
- Experience preparing smart contracts for security audits and supporting production environments.
- Familiarity with digital identity, verifiable credentials, or privacy-preserving technologies.
- Experience designing scalable blockchain architectures.
- Hands-on experience with Hardhat or Foundry, OpenZeppelin libraries, and smart contract testing frameworks.
- Experience working in regulated industries or security-sensitive environments.
In return we offer:
- The friendliest community of like-minded IT-people.
- Open knowledge-sharing environment with exclusive access to experienced colleagues across a wide range of modern technologies.
- Mobilunity Medical Insurance program designed to support our teams’ needs.
- Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note.
- Perfect office location in the city center (900 m from Lukyanivska metro station) or fully remote work-you can choose the format that suits you best.
- No open-space setup-separate rooms for every team’s comfort and multiple lounge and gaming zones.
- English classes in both individual and group formats with elements of gamification.
- Never-ending fun: sports events, tournaments, music band, and multiple affinity groups.