Blockchain Engineer (Rust) - Building a Blockchain (freelance)

Job Description & Summary

PwC Poland’s Digital& team is a modern software house within a large consulting company. We connect start-up dynamics and innovation with endless possibilities of a pre-established PwC global network.
Join us and seize the opportunity to work on cutting-edge technologies like GenAI, AI agents & co-pilots, cloud computing, chatbots, data lakes, and advanced machine learning algorithms, all built on a foundation of modern application development across diverse frontend and backend technologies.

We are looking for:

Blockchain Engineer (Rust) - Building a Blockchain (freelance)

Your future role:

• Architect, develop, and optimize blockchain protocols using Rust.
• Design and implement advanced consensus mechanisms and cryptographic solutions.
• Work on Layer 1 and Layer 2 blockchain solutions, ensuring high performance and security.
• Develop and maintain smart contract platforms (e.g., Substrate).
• Optimize blockchain storage solutions and work with databases such as RocksDB.
• Ensure interoperability between different blockchain networks.
• Lead technical discussions, mentor junior engineers, and conduct code reviews.

Apply if you have:

• Expert Level:
• 7+ years of experience in distributed systems and blockchain development.
• Deep understanding of consensus mechanisms (PoW, PoS, BFT, etc.) and their implementation.
• Expertise in cryptographic security, including hashing, digital signatures, and zero-knowledge proofs.
• Experience in designing tokenomics and blockchain economic models.
• Strong background in developing Layer 1/Layer 2 blockchain solutions and cross-chain interoperability.
• Proven ability to design and implement secure cryptographic systems.

• Senior Level:
• 4+ years of experience in Rust and distributed systems.
• Strong knowledge of cryptographic principles and blockchain security.
• Experience in designing and optimizing consensus algorithms.
• Hands-on experience with smart contracts (Substrate, EVM-based platforms, etc.).
• Proficiency in performance profiling and optimization tools (Flamegraph, perf).
• Ability to lead technical discussions, perform code reviews, and mentor engineers.

• Mid 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.).
• Familiarity with fundamental blockchain data structures (Merkle Trees, DAGs).
• Understanding of database systems (e.g., RocksDB) and their role in blockchain.
• Proficiency in Rust testing and debugging tools.

By joining us you gain:

• Work on diverse and intriguing projects, avoiding routine and promoting a consulting mindset,
• Benefit from a hybrid work model, flexible hours, and the possibility of occasional remote work,
• Clear career progression path that values a consulting-oriented approach,
• Opportunities to engage in international projects and occasional business trips.

Recruitment process:

• Submit your resume,
• Have a short phone conversation with our Recruiter,
• Let's get to know each other better in the interview!

With any queries please contact [email protected] with job title in the subject.

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