Protocol Engineer (Go)

Job#: 3055319
Job Description:
Protocol Engineer (Go)
Location: CONCORD, California (Onsite)
Role Overview
In this contingent resource assignment, you will contribute to a next-generation Digital Asset Platform. You will be responsible for architecting the core settlement engine, working at the intersection of distributed systems and applied cryptography. This role involves translating complex mathematical proofs into high-performance, production-grade Go code.
Key Responsibilities

• Consult on or participate in moderately complex initiatives and deliverables within Specialty Software Engineering.
• Contribute to large-scale planning related to Specialty Software Engineering deliverables.
• Review and analyze moderately complex Specialty Software Engineering challenges that require an in-depth evaluation of variable factors.
• Architect and build a custom blockchain application using Go, Cosmos SDK, and CometBFT (Tendermint).
• Implement and optimize privacy-preserving primitives, specifically Pedersen Commitments and Bulletproofs (Range Proofs).
• Engineer custom ABCI++ extensions (specifically PrepareProposal and Vote Extensions) to implement an on-chain Multi-Party Computation (MPC) mixing network.
• Design a custom KVStore state machine that manages homomorphic encrypted balances.
• Optimize cryptographic operations for low latency and high throughput in a distributed environment.
• Build secure off-chain query layers and "view key" mechanisms for granular, permissioned regulatory auditing.

Required Qualifications
Experience:

• 5+ years of Specialty Software Engineering experience, or equivalent demonstrated through one or a combination of the following: work experience, training, military experience, education.
• 3+ years of experience in backend or systems programming, with expert-level proficiency in Go (Golang).
• 1+ year of experience with BFT consensus algorithms, P2P networking, and state replication; reliable, distributed systems experience.
• 6+ months of experience with Elliptic Curve Cryptography (ECC).

Technical Skills:

• YugaByte/Postgres
• Liquibase

Preferred Qualifications

• Deep experience with Cosmos SDK and CometBFT.
• Experience with Pedersen Commitments (Homomorphic encryption properties).
• Knowledge of Zero-Knowledge Proofs (specifically Bulletproofs or Sigma protocols).
• Demonstrated ability to read academic whitepapers and translate mathematical specifications into functioning code.
• Experience with Multi-Party Computation (MPC) or Verifiable Secret Sharing (VSS) schemes.
• Familiarity with the Ristretto255 curve or libraries like gnark-crypto.
• Background in FinTech, payment systems, or high-frequency trading platforms.
• Understanding of the Account Model vs. UTXO Model trade-offs in privacy-preserving ledgers.

Why Join Us

• Work on fundamental privacy/compliance contradictions in the global financial system.
• Your code will secure high-value institutional transactions.
• You will play a key role in architectural decisions, choosing the right curves, libraries, and design patterns.

Candidates requiring sponsorship will not be considered for this position.
Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.
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