| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Sismo | Paris, France | $63k - $100k | |||
Sismo | Paris, France | $72k - $84k | |||
Sismo | Paris, France | $72k - $84k | |||
Sismo | Paris, France | $63k - $65k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Matter Labs | EU | $81k - $84k | |||
Matter Labs | EU | $74k - $120k | |||
Aztec | New York, NY, United States | $63k - $75k | |||
Aztec | London, United Kingdom | $72k - $75k | |||
Worldcoin | remote | $62k - $66k | |||
Questbook | Remote | $45k - $135k | |||
Worldcoin | San Francisco, CA, United States | $170k - $250k | |||
Consensys | Remote | $176k - $366k | |||
Matter Labs | EU | $63k - $100k | |||
Polygon Labs | Remote | $72k - $102k | |||
Worldcoin | San Francisco, CA, United States | $170k - $250k |
This job is closed
Sismo is an attestation protocol that enables users to selectively reveal data derived from their web2 or web3 accounts.
Users aggregate their identity and use it to generate ZK proofs that applications can verify through our on-chain and off-chain verifiers. The resulting privacy-preserving attestations—stored in on-chain smart contracts or off-chain databases—are utilized by applications for access control and reputation curation.
Standing at the crossroads between digital identity, web3 social, and zero-knowledge technology, we were recently featured in a list of Vitalik Buterin’s most exciting projects.
Our Factory — the portal for integrating Sismo — currently enables developers to create ZK Badges, a tokenized form (SBTs) of attestations issued by the Sismo protocol.
Our tightknit team of crypto natives has been working on Ethereum since 2015 (ex Aave, EthCC, Kleros, ConsensSys). To realize our vision, we raised $10,000,000 from some of the biggest names in crypto (angels such as Lens, Optimism, Starkware, the Ethereum Foundation, Curve, Aave, Snapshot, Guild, and top VCs like Framework, Delphi, IDEO or Seedclub Ventures).
Team members are exposed to the best training, conferences, and hackathons the space has to offer.
You can expect to join a mission-driven crypto-native team passionate about privacy, decentralization, and the technology that will power the future of the web.
Learn more: docs.sismo.io
Role
As Sismo’s Backend Engineer, you will be in charge of maintaining and improving the backend infrastructure powering the entire Sismo protocol. It includes the Sismo hub, our different APIs and core packages, as well as the infrastructure behind it all. You will work closely with our smart contracts, ZK circuits, and product front-ends—as well as entirely new products.
Requirements
- 4+ years of experience building scalable applications
- Experience in web3/ open source
- Strong communication skills
- Conviction for crypto and privacy
Nice to have
- Experience writing smart contracts, ZK circuits, subgraphs, and other crypto tools
- Experience working as a DevOps
- Fluent in English (French is a bonus)
Tech stack Sismo
- Back: Typescript, Node.js
- DB: PostgreSQL and DynamoDB
- APIs: REST, GraphQL, theGraph
- Infra: AWS infrastructure, Docker, Github Action
- Smart contracts & ZK: Solidity, Foundry, Hardhat, Ethers.js, Circom
- Front: React/ Next
Benefits
- Strong incentives (market salary + tokens package)
- Ability to take large ownership
- Remote-friendly
- Participation in some of crypto’s biggest events and conferences
- Become entrenched in the ZK, web3 social and identity communities
What is Zero-knowledge?
Zero-knowledge is a concept in cryptography that allows two parties to exchange information without revealing any additional information beyond what is necessary to prove a particular fact
In other words, zero-knowledge is a way of proving something without actually revealing any details about the proof
Here are some examples of zero-knowledge:
- Password authentication: When you enter your password to log into an online account, the server doesn't actually know your password. Instead, it checks to see if the hash of your password matches the stored hash in its database. This is a form of zero-knowledge because the server doesn't know your actual password, just the hash that proves you know the correct password.
- Sudoku puzzles: Suppose you want to prove to someone that you've solved a particularly difficult Sudoku puzzle. You could do this by providing them with the completed puzzle, but that would reveal how you solved it. Instead, you could use a zero-knowledge proof where you demonstrate that you know the solution without actually revealing the solution itself.
- Bitcoin transactions: In a Bitcoin transaction, you prove that you have ownership of a certain amount of Bitcoin without revealing your private key. This is done using a zero-knowledge proof called a Schnorr signature, which allows you to prove ownership of a specific transaction output without revealing the private key associated with that output.
- Secure messaging: In a secure messaging app, you can prove to your contacts that you have access to a shared secret without revealing the secret itself. This is done using a zero-knowledge proof, which allows you to prove that you have access to the secret without actually revealing what the secret is.