Senior Software Engineer

Confidentiel; Hong Kong; On-site; HKD 950,000 - 1,500,000; Full time

Job summary

Confidentiel in Hong Kong seeks a Senior Software Engineer responsible for building internal tools powering trading operations, including token vesting, treasury and asset tracking, and API integrations with CEXs.

You will lead design and implementation of smart-contract based multisender, ensure security and upgradeability, mentor junior engineers, and collaborate with treasury, finance, and operations teams.

Experience with Solidity, Hardhat, ethers.js, and custody APIs is valued.

Qualifications

• Bachelor's degree in Computer Science or related field.
• 6+ years building production software systems with finance data or crypto.
• Proven track record shipping internal tools and dashboards under tight deadlines.
• Hands-on with smart contracts (Solidity) and on-chain tooling.
• Strong API integration experience with exchanges and custody platforms.
• Experience with blockchain libraries and wallet infrastructure.

Responsibilities

• Develop and enhance the internal token vesting platform with multi-token support.
• Integrate with smart contracts, multisigs, and treasury systems for distributions.
• Design and maintain a multisender for batch token transfers.
• Build asset tracker/treasury tool aggregating crypto balances.
• Create robust API integrations with major CEXs and custody providers.
• Lead security, testing, and upgradeability; mentor engineers.

Skills

Production systems

API integration

Solidity

Smart contracts

Security mindset

Mentoring engineers

Crypto / blockchain

Data reconciliation

Education

Bachelors in CS

Tools

ethers.js

web3.js

Hardhat

Foundry

Fireblocks

Coinbase Custody

Job description

We are seeking a Senior Software Engineer responsible for designing, building, and enhancing critical internal tools that power trading operations. The role covers token vesting platforms, treasury and asset tracking (crypto balance sheet), multi-platform API integrations with CEXs and custodians, rapid development of portals and dashboards for the quantitative Fund-of-Funds (FOF) business and node/validator operations, and an internally built smart-contract-based multisender.

Responsibilities

• Develop, maintain, and enhance the internal token vesting platform (with knowledge of vesting schedules, cliffs, multi-token support, claim portals, audit trails, and reporting).
• Integrate with smart contracts, multisigs, and treasury systems for secure distributions.
• Design, develop, and maintain an internally built smart-contract-based multisender for efficient, secure batch token transfers.
• Handle gas optimization, batching logic, multi-token support, access controls, auditability, and integration with internal treasury and operational workflows.
• Ensure robust security practices, testing, and upgradeability considerations where appropriate.

Treasury & Asset Tracking (Crypto Balance Sheet)

• Build and evolve the asset tracker/treasury management tool that aggregates crypto balances across wallets, exchanges, and custodians into a unified, real-time or near-real-time balance sheet.
• Implement reconciliation, historical tracking, valuation, exposure reporting, and alerting.

API Connectivity & Integrations

• Design and implement robust API integrations with major CEXs and institutional custodians (Fireblocks, Coinbase, Anchorage, and others).
• Handle authentication, rate limits, webhooks, data normalization, and reliable data pipelines.
• Rapidly develop internal portals and dashboards for the business (performance, risk, allocation, operational metrics).
• Create monitoring and management dashboards for node and validator operations (uptime, rewards, performance, risk indicators).
• Deliver polished, usable internal tools with clean UX and role-based access.

Cross-Functional & Technical Leadership

• Architect scalable, secure solutions and own technical decisions across the tools above.
• Collaborate closely with treasury, finance, quant, operations, and security teams.
• Maintain high standards for code quality, testing, documentation, monitoring, and security (especially around keys, credentials, and smart contracts).
• Mentor junior engineers and contribute to engineering best practices.

Requirements

• Bachelor's degree in Computer Science (or related field)
• Minimum 6 years of software development experience, with significant time building production systems involving financial data, APIs, or crypto/blockchain.
• Proven track record shipping internal tools, dashboards, or operational platforms under tight timelines.
• Hands-on experience with smart contracts (Solidity preferred) and on-chain tooling, including batch/multisend patterns.
• Solid smart-contract development experience (Solidity, Hardhat/Foundry, testing, gas optimization, security best practices).
• Deep experience integrating third-party APIs (especially exchange and custody APIs) and building data aggregation/reconciliation systems.
• Familiarity with blockchain libraries (ethers.js / viem / web3.js), custody/MPC platforms (Fireblocks experience highly valued), and wallet infrastructure.
• Strong security mindset for handling credentials, private keys/secrets, and financial/smart-contract systems.

Nice to Have

• Prior experience with Fireblocks, Coinbase Prime/Custody, Anchorage, or similar platforms.
• Experience building or maintaining multisender/batch transfer contracts or similar operational smart-contract utilities.
• Exposure to quantitative finance, fund operations, or node/validator infrastructure.
• Knowledge of digital asset accounting/treasury workflows.