Specialty Software Engineer 3

Outstanding long-term contract opportunity! A well-known Financial Services Company is looking for a Specialty Software Engineer in Concord, CA (Hybrid).

Work with the brightest minds at one of the largest financial institutions in the world. This is a long-term contract opportunity that includes a competitive benefit package! Our client has been around for over 150 years and is continuously innovating in today's digital age. If you want to work for a company that is not only a household name, but also truly cares about satisfying customers' financial needs and helping people succeed financially, apply today.

Contract Duration: 12 Months

Required Skills & Experience

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

Desired Skills & Experience

• 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

What You Will Be Doing

• 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.
• Core Protocol Development: Architect and build a custom blockchain application using Go, Cosmos SDK, and CometBFT (Tendermint)
• 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 PrepareProposal 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