Lead Specialty Software Engineer (Protocol Engineer)

THIS IS ONLY ON W2 Job ID: 180539 Position: Lead Specialty Software Engineer (Protocol Engineer) Pay Range: $70-80/hour. on W2 Location: Concord, California (Hybrid) Duration: Till 11/04/2027, with possible extension Job Description/About this Role: Client is seeking a Lead Specialty Software Engineer (Protocol Engineer) to contribute to a next-generation Digital Asset Platform designed to solve the most critical challenge in institutional finance: achieving strict regulatory compliance without compromising transaction confidentiality. As a Lead Protocol Engineer, candidates will be responsible for architecting the core settlement engine. Candidates will work at the intersection of distributed systems and applied cryptography, translating complex mathematical proofs into high-performance, production-grade Go code. Responsibilities: Core Protocol Development: Architect and build a custom blockchain application using Go, Cosmos SDK, and CometBFT (Tender mint) Cryptographic Implementation: Implement and optimize privacy-preserving primitives, specifically Pedersen Commitments and Bulletproofs (Range Proofs), ensuring no trusted setup is required Consensus Customization: Engineer custom ABCI extensions (specifically Prepare Proposal and Vote Extensions) to implement an on-chain Multi-Party Computation (MPC) mixing network State Machine Design: Design a custom KVStore state machine that manages homomorphic encrypted balances (Elliptic Curve points) instead of plaintext integers Performance Engineering: Optimize cryptographic operations (scalar multiplication, point addition) for low latency and high throughput in a distributed environment Auditing Infrastructure: Build secure off-chain query layers and "view key" mechanisms that allow for granular, permissioned regulatory auditing Required Qualifications: 5 plus years of Specialty Software Engineering experience, or equivalent demonstrated through one or a combination of the following: work experience, training, military experience, education. 3 plus years of experience in backend or systems programming, with expert-level proficiency in Go (Golang) 6 plus months of experience with Elliptic Curve Cryptography (ECC) 1 plus year of experience with BFT consensus algorithms, P2P networking, and state replication; reliable, distributed systems experience. Desired Qualifications: Blockchain Core: Deep experience with Cosmos SDK and CometBFT. Comfort building custom modules and modifying consensus logic, not just deploying smart contracts. Pedersen Commitments (Homomorphic encryption properties) Zero-Knowledge Proofs (specifically Bulletproofs or Sigma protocols) Math-to-Code: Demonstrated ability to read academic whitepapers/preprints and translate mathematical specifications into functioning code. Experience with MPC (Multi-Party Computation) 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. Top Skills: Yuga Byte/Postgres and/or Liquibase In this contingent resource assignment, candidates may: Consult on or participate in moderately complex initiatives and deliverables within Specialty Software Engineering and 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. Contribute to the resolution of moderately complex issues and consult with others to meet Specialty Software Engineering deliverables while leveraging solid understanding of the function, policies, procedures, and compliance requirements. Collaborate with client personnel in Specialty Software Engineering. About - PTR Global: PTR Global is a leading provider of information technology and workforce solutions. 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The specific compensation for this position will be determined by several factors, including the scope, complexity, and location of the role, as well as the cost of labor in the market; the skills, education, training, credentials, and experience of the candidate; and other conditions of employment. Our full-time consultants have access to benefits, including medical, dental, vision, and 401K contributions, as well as PTO, sick leave, and other benefits mandated by applicable state or localities where you reside or work. If you receive a suspicious message, email, or phone call claiming to be from PTR Global, do not respond or click on any links. Instead, contact us directly at +1 . To report any concerns, please email us at