Cryptography Expert | Remote
Full-time - Remote
About employer and position:
Join our dynamic and innovative team at a well-established product company headquartered in the vibrant city of Bucharest, Romania. We're a diverse team of over 20 talented individuals working remotely across Europe, passionate about crafting exceptional digital experiences.

We are looking for a highly passionate, highly skilled Cryptography Expert with attention to detail who will be responsible for developing and maintaining custom cryptographic algorithms for our own blockchain network. If you thrive in a collaborative environment and are eager to contribute to the evolution of a high-impact product, then we want to hear from you!
  • Deep understanding of zero-knowledge proofs
  • Deep knowledge of Merkle Trees
  • Great attention to detail
  • Being self-sufficient
  • Experience in designing and implementing custom cryptographic algorithms
  • Proven experience in integrating cryptographic algorithms (e.g., RSA, ECC, AES, SHA-256) and protocols (e.g., TLS, SSL, PKI)
  • Experience in designing or implementing cryptographic solutions, preferably within a blockchain or distributed ledger technology environment
  • Extensive experience in securing software infrastructures end-to-end
  • Deep understanding of Double-Ratchet and MTProto protocols
Nice to have:
  • Ph.D. in Cryptography
  • Certified Blockchain Security Expert (CBSE)
  • Deep understanding of the blockchain(web3) ecosystem
  • Experience with TON network
  • Experience with Nostr
  • Experience with Golang, C/C++ or Rust
  • Experience in developing and releasing blockchain software
  • Experience in security smart contracts
  • Deep understanding of quantum-resistant cryptographic algorithms
Recruiting process:
  1. Introduction call with COO (30-45 min)
  2. Technical interview with CTO (1,5 hr)
  • Fully remote job
  • Competitive salary in USD with regular reviews
  • $4,000 annual personal budget for employee benefits (private health insurance, fitness subscription, training courses etc.)
  • 20 paid vacation days
  • Flexible working hours
  • Zero bureaucracy
  • The environment of high-level experts
  • A nimble, relaxed, and dynamic startup environment
To apply please send your CV to
© 2023 Picstar, LLC. All Rights Reserved.
  • Email:
  • 1A, Sportyvna Square, Tower B, Floor 11, Kyiv, Ukraine