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

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 pl_ITrecruitment@pwc.com with job title in the subject.

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