Applied Cryptography Engineer
Kubelt
- New York, New York, United States
- New York, New York, United States
Über
data economy .
This is your opportunity to join an ambitious early‑stage startup that has already secured funding and reached product commercialization, and work on an industry‑redefining product from a place of relative financial stability.
About us Kamu is the first of a kind
decentralized data lakehouse
that handles large volumes of structured and highly dynamic data (Industrial IoT, DePIN, scientific data). Think of it as Databricks / Snowflake of Web3, where data can be efficiently shared between individuals and companies while protecting
privacy and personal data ownership .
Kamu’s
verifiable stream processing network
allows people to build pipelines that continuously clean and integrate data from millions of sources globally, while ensuring that data is 100% auditable and trustworthy, no matter how many hands it went through. Think of it as GitHub for data pipelines, where people can collaborate on data processing on the similar scale as on software.
Kamu
blurs the boundary between on- and off-chain
data by providing the cheapest way to query massive volumes of data from smart contracts and query data from blockchains side‑by‑side with industry and government data.
Kamu brings superior automation, accountability, and infinite composability to the data flows that underpin our society.
Kamu is backed by multiple investors and companies including
Protocol Labs
(the creators of IPFS and Filecoin) and
Dell Technologies .
We are a:
Distributed, multinational
company with presence in Canada, Ukraine, and Spain
Deeply technical
team, with decades of experience in big data, distributed software, and a few PhDs in AI/ML and computer science
Team that takes pride in delivering
quality
products and efficient
workflows
Believers in core values of
Web3 , with a very pragmatic view of achieving them
Open Source
enthusiasts and constantly share progress with the
community
through publications and conferences.
Role As an Applied Cryptography Engineer in Kamu you will be working hands‑on on the core formats and protocols that serve our network:
A stream‑oriented data format that works with conventional and decentralized storages
A metadata format that serves as a passport of data and describes every event that influenced it
A protocol for verifiable, reproducible, and auditable multi‑party data processing
You will drive research and development of prototypes that advance the decentralization and security of our network.
You will communicate with the team by authoring technical design documents, continously making your work a part of our open format and protocol specification.
You will be the bearer of security domain expertise who consults data and platform architects on design and implementation of security‑related features.
Responsibilities Technology stack:
Rust
Cloud (S3, GCS) and decentralized (IPLD, IPFS, Filecoin) storage
Parquet, Apache Arrow, Streaming (temporal) SQL, Apache Spark, Flink, DataFusion engines
Kubernetes
EVM blockchains, Solidity smart contracts
Your work will include:
Evolving the core data formats and protocols to support:
Granular encryption to control access to ranges of data within one date stream
PKI‑based permissions and access controls
Developing smart contract that implement or integrate solutions for decentralized identity and permission management
Integrating identity and key management solutions into our CLI and server products
Desiging and assisting in implementation of features like:
Batch query proofs over various data access protocols
Verifier nodes and attestations of data stream validity
Applying verifiable computing techniques to stream processing
Privacy‑preserving data processing (federated, TEEs, homomorphic encryption)
Keeping up‑to‑date on security standards and proposing ways to interoperate with them
Communicating your progress to users and the community
Contributing to the product documentation and automated testing
Requirements
Bachelor’s degree in Cryptography, Mathematics, Computer Science, or a related field
4+ years of industry experience
Required skills:
Experience implementing cryptographic protocols in languages like Rust, Go, C/C++, or equivalent.
Strong understanding of PKI: cryptographic protocols, certificates, key management and advanced key exchange schemes
Knowledge of centralized authentication protocols (e.g OAuth) and authorization architectures (e.g. ABAC / RBAC / ReBAC)
Blockchain architecture, indexer and oracle fundamentals
Software quality (test pyramid, CI/CD, fuzzing, formal verification techniqes)
Bonus skills:
Contributions to open‑source cryptographic projects or published research in security/crypto conferences
Knowledge of decentralized identity and permission solutions (DIDs, UCAN, Verifiable Credentials)
Experience with Verifiable Computing techniques, such as Zero‑Knowledge Proofs (ZKPs), SNARKs/STARKs, homomorphic encryption
Experience with Trusted Execution Environment solutions
Knowledge of blockchain and smart contract security, and awarness of modern L1 and L2 protocols
SQL, data analytics, and data science toolkits (Pandas, R)
Docker, AWS, Kubernetes
Development methodologies (Agile, Scrum)
Decentralized storage architecture (IPLD, IPFS, Filecoin)
Familiarity with security standards and compliance frameworks (e.g., NIST, FIPS, ISO 27001, GDPR)
Strong problem‑solving skills and ability to stay oriented towards the product and end‑users in your research
Good written English skills, ability to write clear documentation
What we offer
Remote work with flexible hours
Competitive salary, equity
$1,500 home office equipment stipend
️ 21 days of paid vacation per year
✈️ Conference travel and education budget
Location We are a fully remote team, but have a strong preference for candidates residing between UTC‑08:00 (Pacific Coast) and UTC+02:00 (Eastern Europe) time zones for maximal overlap between the team members.
Commitment This is a primarily full‑time position, but we can consider
a part‑time engagement
with a highly skilled applicant.
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Sprachkenntnisse
- English
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