Senior Blockchain Software Engineer, Cosmos & Privacy

Kelly Services; Concord (CA); Hybrid; USD 98,000 - 110,000; Full time

Job summary

Kelly Services in Concord, CA is seeking a Specialty Software Engineer for a long-term contract opportunity. Hybrid work setup with a competitive compensation and exposure to a leading financial institution.

Core work includes building a custom blockchain app using Go, Cosmos SDK, and CometBFT, implementing privacy-preserving primitives, and designing a scalable KVStore state machine for encrypted balances.

Qualifications

• 4+ years of Specialty Software Engineering experience or equivalent.
• 3+ years of backend or systems programming with Go (Golang).
• 6+ months of ECC experience.
• 1+ year of distributed systems, with peer-to-peer networking and state replication.

Responsibilities

• Consult on or participate in moderately complex initiatives within Specialty Software Engineering and contribute to large-scale planning.
• Review and analyze moderately complex challenges requiring in-depth evaluation of variables.
• Contribute to resolution of issues and consult with others to meet deliverables while following policies and compliance.
• Collaborate with client personnel in Specialty Software Engineering.
• Core Protocol Development: Architect and build a custom blockchain application using Go, Cosmos SDK, and CometBFT.
• Cryptographic Implementation: Implement privacy-preserving primitives like Pedersen Commitments and Bulletproofs.
• Consensus Customization: Engineer custom ABCI++ extensions for an on-chain MPC mixing network.
• State Machine Design: Design a KVStore state machine for homomorphic balances.
• Performance Engineering: Optimize cryptographic operations for latency and throughput.
• Auditing Infrastructure: Build secure off-chain query layers and granular auditing mechanisms.

Skills

Go (Golang)

Backend systems

ECC

P2P networking

Tools

Cosmos SDK

CometBFT / Tendermint

gnark-crypto

Ristretto255

Job description

Kelly Services in Concord, CA is seeking a Specialty Software Engineer for a long-term contract opportunity. Hybrid work setup with a competitive compensation and exposure to a leading financial institution.

Core work includes building a custom blockchain app using Go, Cosmos SDK, and CometBFT, implementing privacy-preserving primitives, and designing a scalable KVStore state machine for encrypted balances.