Simfony is the frontend to Simplicity, a next-generation alternative to Bitcoin Script that enables advanced contract logic while maintaining security and efficiency.
You own Simfony’s Rust-based language development. You work on building, improving, and refining Simfony as a smart contract language. You build and deploy Simfony on the Liquid Blockchain.
You Implement smart contracts. You’ll recreate existing Bitcoin Script functionality in Simfony and extend functionality using Simplicity, making contracts more expressive and powerful.
You have:
Expertise in Rust.
Deep understanding of Bitcoin’s scripting model. You have a strong knowledge of Bitcoin Script, Taproot, Schnorr signatures, SegWit, Miniscript, and Confidential Transactions.
Experience with smart contract development, time-locked contracts (HTLCs, vaults, inheritance-based transfers), multi-signature setups, or covenant-based mechanisms.
Comfortable working with Bitcoin’s developer tooling. Experience with Bitcoin Core, CLI tools, test environments (Testnet, Regtest), and security testing tools like fuzz testing.
Problem solver. You enjoy tackling difficult programming challenges and designing creative solutions for complex problems.
A builder’s mindset. You don’t just write code, you design systems that solve real problems.
Clear communicator. You can explain complex technical ideas simply, write thorough documentation, and work well with a team.
Comfortable with an education component. At least X% of this role involves documentation, teaching, and developer advocacy, helping others understand and build with Simfony.
Strong grasp of WebAssembly (WASM). Experience working with low-level execution environments or blockchain virtual machines is helpful.
Familiarity with other blockchain ecosystems and smart contract platforms. You know about Ethereum (Solidity), Web3, DeFi, DAOs, Bridges, and Oracles, and understand the use cases people are seeking.
Experience using and deploying production-grade smart contracts. You’ve seen the challenges, MEV risks, DoS attacks, and syntax errors.
Experience in Haskell, or other functional languages is a plus.
Knowledge of alternative smart contract paradigms. Familiarity with ZK-proofs, rollups, or novel execution models is a plus.
Familiarity with low-level cryptographic libraries. Understanding elliptic curve cryptography, signature schemes, and hash-based cryptographic structures can be beneficial.
