Remote Senior Blockchain Developer

Summary

The job is for a DeFi developer in a remote-first company. The role involves architecting and implementing blockchain solutions, working with the team to deliver projects, translating business needs into technical solutions, writing smart contracts, supporting pre-sales team, participating in workshops, supporting other team members, conducting tech interviews, maintaining internal knowledge, and more. Requirements include 5+ years of programming experience, 2+ years of Solidity/Rust development, familiarity with EVM compatible or Rust-based blockchains, English at least B2, C1 preferred, knowledge of tools of the trade, deep knowledge about blockchain security, knowledge and experience working with existing popular DeFi protocols, ability to design and implement architecture for new DeFi products, ability to write unit tests and maintain high quality of test coverage. Preferred requirements include hands-on experience with specific protocols or forks, experience with ZK-Proof, Decentralized identifiers, Python, Node.JS or JavaScript, knowledge of Docker, experience with web3.py / ethers.js, good understanding of ABI specification, hands-on experience with crypto wallets, exchanges, bridges and bots, experience with solutions like TheGraph, IPFS, ChainLink, Keep3r, Gelato, familiarity with Layer 2 blockchains, Solana / Polkadot, modern Token Standards, Polish language skills. Benefits include salary depending on skills and experience PLN 20 000 - 30 000 net + VAT on a B2B contract with a minimum of 10 days of paid time off, all necessary equipment such as laptop, additional monitor and accessories, flexible working hours, ability to work 100% remotely or in one of the offices (Warsaw or Poznan), private healthcare, additional grant for more advanced educational projects, multisport card and other benefits of choosing from the MyBenefit cafeteria system, co-financing of English & Polish classes, mental health support on Wellbee platform, individual career path and professional development initiatives, co-financing of team building initiatives (remote and offline), unique welcome pack.

Requirements

• 5+ years of experience in programming
• 2+ years of Solidity/Rust development
• Familiarity with EVM compatible or Rust-based blockchains
• English at least B2, C1 preferred
• Knowledge of tools of the trade (e.g. Hardhat/Brownie/DappTools)
• Deep knowledge about blockchain security and best practices writing decentralized code
• Knowledge and experience working with existing popular DeFi protocols and their forks (DEXes - like Uniswap V2/V3 or Balancer, borrowing/lending protocols - like Compound or AAVE, yield farming protocols - like Yearn)
• Ability to design and implement architecture for new DeFi products (utilizing knowledge of AMMs, liquidations, bonding curves, liquidity mining, tokenomics design and building incentivisation frameworks)
• Ability to write unit tests and maintain high quality of test coverage

Responsibilities

• Architecting and implementing the blockchain solutions we build
• Working with the team, client and project manager to efficiently deliver projects
• Translating business needs to technical solutions and communicating with the client
• Writing smart contracts in Solidity / Vyper for EVM compatible blockchains or Rust/Ink for Solana / Polkadot
• Supporting the pre-sales team with your expertise, participating in workshops with potential clients, estimating projects
• Supporting other team members (backend/frontend/mobile/qa/etc) with blockchain expertise and advisory
• Tech interviews with potential employees and helping to build teams appropriate for given projects
• Maintaining internal knowledge and know how

Preferred Qualifications

• Hands-on experience with protocols or forks of Alchemix, Abracadabra, Olympus or Tokemak
• Experience with ZK-Proof, Decentralized identifiers
• Experience with Python, Node.JS or JavaScript
• Knowledge of Docker
• Experience with web3.py / ethers.js
• Good understanding of ABI specification
• Hands-on experience with crypto wallets, exchanges, bridges and bots
• Experience with solutions like TheGraph, IPFS, ChainLink, Keep3r, Gelato
• Familiarity with Layer 2 blockchains is a plus
• Familiarity with Solana / Polkadot is a plus
• Familiarity with modern Token Standards and your own deployments / listings on DEXes and marketplaces is a plus
• Polish language skills

Benefits

• Salary depending on your skills and experience PLN 20 000 - 30 000 net + VAT on a B2B contract with a minimum of 10 days of paid time off (alternative forms of employment are also possible)
• All necessary equipment such as laptop, additional monitor and accessories
• Flexible working hours
• You can work 100% remotely or in one of our offices ( Warsaw , Poznan )
• Private healthcare (employee’s package covered by the company)
• Additional grant for more advanced educational projects (given twice a year for more than 1 000 PLN)
• Multisport card and other benefits of choosing from the MyBenefit cafeteria system
• Co-financing of English & Polish classes
• Mental health support on Wellbee platform
• Individual career path and professional development initiatives
• Co-financing of team building initiatives (remote and offline)
• Unique welcome pack