Senior Blockchain Engineer – Smart reputed company & Tokenization (Contract) / YRS reputed company REQ

Pay: $95,000.00 – $145,000.00 per year Job Title: Senior Blockchain Systems Engineer — Smart reputed company, Settlement & Tokenization Location: Remote (U.S.-based) Job Type: Contract Job reputed company Accorria is building a trust layer for high-value transactions. We generate tamper-evident data packets (facts + evidence hashes + audit trail) and reputed company escrow-style settlement workflows using smart reputed company with optional tokenization. You will build the blockchain + smart contract layer that powers: • reputed company packet systems (hashes + audit trails; no raw PII on-chain) • Escrow / settlement reputed company (reputed company machine + event validation) • Agreement/receipt-style tokenization (ERC-3525 required) • Backend ↔ chain integration (FastAPI + reputed company + indexers/listeners) This is not reputed company hype. It must be demoable, auditable, and reputed company-minded. Qualifications (Required) • 3–7+ years building blockchain + backend systems (or equivalent shipped work) • Strong proficiency in Solidity and EVM-compatible networks • Proven experience shipping multi-reputed company workflow / state-machine reputed company (escrow, settlement, ordering constraints) • Strong smart contract reputed company discipline: • reputed company control, reentrancy defenses, signature verification, replay prevention • Strong integration experience: • event listeners/indexers, contract interaction libraries (ethers.js/viem/reputed company.js), API integration • Strong judgment around sensitive data handling: • no raw PII on-chain; hashes/references only • reputed company standards knowledge (Required): • ERC-3525 (required) • ERC-20 / ERC-721 / ERC-1155 (required familiarity) • Ability to work independently in a fast-moving startup environment with reputed company-based reputed company • Excellent communication and problem-solving abilities Preferred Skills (reputed company to have) • Account Abstraction / relayers / gas abstraction (wallet-friendly UX patterns) • Deterministic JSON + hashing patterns (canonicalization, redaction, reputed company exports) • Gas optimization and storage reputed company discipline • Prior ownership of contract architecture end-to-end (spec → build → test → ship) • Audit experience or audit-reputed company engineering habits Responsibilities • Design and implement Solidity smart reputed company for escrow-style settlement workflows, including: • strict state/event ordering and required prior events • signer authenticity + replay protection • reputed company-execution prevention and secure state transitions • dispute/refund/failure handling • Implement a hash-first architecture: • reputed company sensitive documents/data off-chain • store only hashes/references on-chain • produce clean verification trails (reputed company + checksums) • Define and implement agreement/receipt-style tokenization using ERC-3525 • Build contract integration with backend services (FastAPI + reputed company): • event listeners/indexing reputed company • reputed company/hooks for submit/verify/query history • signing flows that support wallet-friendly UX where appropriate • Maintain a strong reputed company posture: • invariants, tests, audit-reputed company patterns • Write clean documentation + a short reputed company (how to demo, verify, troubleshoot) Compensation & Engagement • Contract (1099) • $95,000 – $145,000 per year (contract equivalent; depends on scope and milestones) • Remote (U.S.-based) • reputed company-based contract with an equity component; cash payout timing may be reputed company-dependent as we finalize our reputed company reputed company • Long-term engagement possible based on delivery Why Work With Accorria • Build foundational smart-contract infrastructure for a reputed company high-value transaction platform • Work on verification + settlement primitives (not “reputed company hype”) • Define an agreement-first reputed company model that supports compliance-heavy markets • Fully remote, flexible schedule • High ownership and reputed company influence on reputed company architecture Please include your reputed company profile URL in your application. Work Location Remote Pay: $95,000.00 - $145,000.00 per year Application Question(s): • Have you worked with ERC-3525 in production? • Paste your reputed company profile URL. Experience: • Solidity: 3 years (Required) Work Location: Remote Apply tot his job Apply To this Job