Blockchain Engineer

The client is one of the Big4 companies

Basic information:

Location: 100% remote (from Poland)

Rate: open

Type of work: B2B contract

Length: long-term project

Recruitment process: 2 stages

English: B2+/C1

Luxmed, MultiSport, equipment provided by client

The Digital team is a “software house” within a large consulting firm, combining the dynamism and innovation of start-ups with the infinite capabilities of the company's global network. The team works in cutting-edge technologies such as GenAI, AI agents and co-pilots, cloud computing, chatbots, data lake and advanced machine learning algorithms, all built on a foundation of application development in various frontend and backend technologies.

Role:

- Development and optimization of blockchain protocols using the Rust language.

- Design and implement advanced cryptographic mechanisms and solutions

- Work on Layer 1 and Layer 2 blockchain solutions, ensuring high performance and security

- Developing and maintaining smart contracts (e.g., Substrate)

- Optimizing blockchain storage solutions and working with databases such as RocksDB

- Ensuring interoperability between different blockchain networks

Leading technical discussions, mentoring junior engineers and conducting code reviews

Expert level:

- 2+ years of experience in distributed systems and blockchain development

- Understanding of consensus mechanisms (PoW, PoS, BFT, etc.) and their implementation

- Experience with cryptographic security, including hashing, digital signatures and zero-knowledge proofs

- Experience in tokenomics design and blockchain economic models

- Experience in developing Layer 1/Layer 2 blockchain solutions and cross-chain interoperability

- Ability to design and implement secure cryptographic systems

Senior Level:

- 7+ years of experience in Rust and distributed systems

- Knowledge of cryptographic and blockchain security principles

- Experience in consensus algorithm design and optimization

- Experience with smart contracts (Substrate, EVM-based platforms, etc.)

- Proficiency in performance profiling and optimization tools (Flamegraph, perf)

- Ability to lead technical discussions, conduct code reviews and mentor engineers

Intermediate level:

- 2-3 years of experience in Rust development

- Basic knowledge of cryptographic techniques such as hashing and digital signatures

- Experience working with consensus algorithms (PoW, PoS, etc.)

- Knowledge of basic blockchain data structures (Merkle Trees, DAGs)

- Understanding of database systems (e.g. RocksDB) and their role in blockchain

- Experience in testing and debugging Rust tools

Team: international, mid-senior

Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361.