Senior Software Engineer (Golang, C/C++, cryptography)

TechBiz Global; Birmingham; On-site; GBP 65,000 - 85,000; Full time

Job summary

A leading technology firm in Birmingham is seeking an experienced systems engineer to architect and design core components of a revolutionary blockchain protocol. You will work with cutting-edge technologies including consensus engines and cryptographic integrations, ensuring scalability and performance. Ideal candidates have over 5 years of experience in systems engineering and proficiency in Golang or C/C++. Join a small, talented team pushing the frontiers of high-throughput off-chain computation.

Benefits

Opportunity to shape a future-defining blockchain protocol

Work with a small, high-caliber team

Contribute to open-source tools

Qualifications

• 5+ years of production experience in systems engineering, with advanced proficiency in Golang and/or C/C++.
• Deep knowledge of distributed systems.
• Strong experience in cryptography, Merkle/sparse Merkle trees.

Responsibilities

• Architect, design, and implement core components of the stack.
• Optimize for scalability, performance, and security in distributed environments.
• Collaborate across layers to ensure seamless integration.

Skills

Production experience in systems engineering

Proficiency in Golang

Proficiency in C/C++

Knowledge of distributed systems

Experience in cryptography

Effective communication

Job description

You will work with the system that redefines how assets are minted, transferred, and managed, ensuring security and atomic consistency through a compact on-chain infrastructure that prevents double-spending. You will be delivering a multi-layered protocol stack (PoW, BFT, SMT aggregation, State Transition & Agent SDK), and are now scaling fast into advanced distributed systems and ZK-integrated modules.

Responsibilities

• Architect, design, and implement core components of the stack, including:
• Proof of Work (PoW) consensus engine in C++
• BFT consensus layer in Golang
• SMT / proof aggregation layer, including ZK applications
• Collaborate across layers to ensure seamless integration, from mining through to off-chain asset handling and crypto-economic guarantees.
• Build the State Transition SDK and shape the upcoming Agent Execution SDK, enabling off-chain transactions and verifiable, composable agent-driven logic.
• Optimize for scalability, performance, and security, particularly in high-throughput, distributed environments.
• Design and validate consensus protocols, including Byzantine Fault Tolerant mechanisms and cross-chain bridge communication.
• Work closely with research colleagues on ZK-proof integrations, SMT sharding, and next-gen cryptographic primitives.

Benefits

• Build a future-defining blockchain protocol that breaks free from monolithic, slow ledgers and centralized execution.
• Work with a small, world-class team pushing the frontier of high-throughput off-chain computation with on-chain security.
• Shape the future of open-source tools, State Transition and Agent SDKs that empower developers globally.

Qualifications

• 5+ years of production experience in systems engineering, with advanced proficiency in Golang and/or C/C++
• Deep knowledge of distributed systems
• Strong experience in cryptography, Merkle / sparse Merkle trees
• Proven ability to operate in fast-paced startups or open-source protocol environments
• Clear, effective communicator, great at collaborating in cross-functional, multidisciplinary teams
• Bonus experience:
• Cryptographic protocol design, consensus protocols, cross-chain bridges
• Zero-knowledge proofs
• Performance profiling