Role Overview

Job Title: Senior Solidity Engineer
Location: Remote - USA

We’re seeking a highly skilled Solidity Engineer to serve as the lead smart contract developer for Telcoin’s blockchain products. In this role, you’ll design, build, and deploy secure and scalable smart contracts that underpin decentralized financial infrastructure. You’ll take ownership of the full development lifecycle, from architecture to production, while working closely with product, compliance, and operations teams. This is a unique opportunity to drive innovation at the core of a global fintech platform.

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Who We Are

Telcoin is a rapidly growing fintech startup headquartered in Singapore. We leverage blockchain technology to deliver fast, secure, and low-cost financial products—including mobile-based remittances and digital asset solutions. Currently operating in 17+ countries, Telcoin is building a global platform that connects users with modern financial tools through a telecom-integrated approach.

Our team includes telecom executives, startup veterans, finance professionals, and world-class engineers. We are now looking for a Senior Solidity Engineer to take ownership of our on-chain architecture and expand the functionality of our blockchain-based financial systems.

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What You’ll Be Doing

• Own the end-to-end architecture, development, testing, and deployment of smart contracts

• Translate business and product requirements into secure, efficient, maintainable on-chain logic

• Enhance cross-chain support from Polygon/Ethereum to other blockchains

• Optimize contracts for gas efficiency, composability, and long-term maintainability

• Conduct rigorous testing (unit, integration, fuzzing) and support third-party security audits

• Stay ahead of emerging blockchain vulnerabilities, attack vectors, and security practices

• Integrate smart contracts with backend services, APIs, and external partners

• Communicate blockchain capabilities and limitations to non-technical teams

• Promote best practices and uphold high standards of code quality and documentation

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What We’re Looking For

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field—or equivalent experience

• 5+ years of professional software engineering experience, with 3+ years in EVM blockchain development

• Proven track record of deploying secure, production-grade smart contracts

• Expert-level Solidity and EVM knowledge

• Strong understanding of token standards, consensus mechanisms, and cryptographic principles

• Hands-on experience with frameworks like Foundry, Hardhat, or Truffle

• Deep familiarity with smart contract security best practices and vulnerabilities

• Ability to take initiative as the lead smart contract developer on projects

• Excellent communication skills across technical and non-technical stakeholders

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Nice to Have

• Experience with stablecoins, DeFi protocols, staking contracts, or bridging infrastructure

• Familiarity with Layer 2 solutions, cross-chain protocols, or multi-chain deployments

• Contributions to open-source blockchain projects

• Awareness of regulatory and compliance considerations in fintech/crypto

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What Telcoin Offers

• Competitive base salary: $100,000 - $150,000 (depending on experience) + annual bonus and stock option plan

• Medical, dental, and vision insurance – 100% employer-sponsored for employee and family

• 401(k) plan with no waiting period

• Unlimited PTO to support work/life balance

• Global exposure across fintech and digital assets

• Dynamic, entrepreneurial environment with room to grow