Innovation at CodesenSys

At CodesenSys, we're not just building cutting-edge blockchain solutions—we're creating a dynamic and inclusive environment where talented professionals from diverse backgrounds thrive. Our team is united by a passion for technological innovation and a commitment to delivering impactful solutions to our clients. Here, every voice matters, and every idea has the potential to shape the future.

Work with Us

At CodesenSys, we're looking for individuals who are passionate about innovation, driven by challenges, and eager to shape the future of decentralized technologies. If you’re ready to join a forward-thinking company that values creativity and personal growth, we’d love to hear from you.

1

Competitive salary

Up to the market and more

2

Flexible working hours

Work life balance

3

Challenging projects

Work on product used by worlds largest financial institutions

4

Remote work

An opportunity to work from anywhere

Our Tech Stack

Your Playground for Innovation

While we are a technology-focused company, we know that the real power behind our success lies in our people. At CodesenSys, you’ll have the chance to work with advanced technologies like Ethereum, Solana, Polygon, and more, but it's our collaborative environment that allows you to truly make an impact. Whether you’re working on blockchain development, AI integration, or decentralized applications (dApps), you’ll have the support and tools needed to succeed.

Explore New Opportunities

We offer opportunities to grow, innovate, and contribute to cutting-edge projects. Join us and unlock exciting career paths.

Senior Blockchain Engineer (Solidity)

Ship secure, gas-efficient smart contracts for enterprise DeFi and tokenized workflows.

Responsibilities

Design, implement, and test Solidity contracts (ERC-20/721/1155, upgradeables, access control).
Own audits, fuzzing, and formal checks; respond to findings, ensuring robust security and scalability.
Integrate smart contracts with Node.js backends and decentralized applications (dApps).
Optimize gas usage and throughput; ensure efficient and cost-effective transactions for high-volume systems.
Develop, maintain, and update thorough documentation and runbooks to ensure smooth deployment and ongoing maintenance.
Collaborate with cross-functional teams to architect decentralized applications (dApps) and blockchain-based solutions.
Lead code reviews, ensuring high-quality code and adherence to best practices.
Conduct security audits to identify and mitigate potential vulnerabilities such as reentrancy, overflow, and front-running.

What we are looking for

3–5+ years of experience in Solidity development with proven expertise in building and deploying smart contracts on Ethereum or other blockchain platforms.
Strong technical expertise with tools like Hardhat, Foundry, OpenZeppelin, and Ethers/Viem.
Experience with security best practices, including preventing reentrancy, overflow/underflow, and price oracle vulnerabilities.
Strong CI/CD familiarity, with a focus on test coverage, automated testing, and property-based testing for smart contracts.
Experience with DeFi protocols, tokenomics, and blockchain integrations.
Solid understanding of blockchain architecture and decentralized finance (DeFi) ecosystems.

Nice to have: Experience with Layer 2 solutions (Polygon, Arbitrum) and cross-chain interoperability. Familiarity with account abstraction and bridging solutions. Contributions to open-source blockchain projects or active participation in blockchain developer communities.