Senior Software engineer(blockchain)

Описание вакансии

Looking for Senior Software engineer(blockchain) - FinTech Istanbul

About us

FinTech Istanbul is a leading innovation hub dedicated to advancing financial technologies in Turkey. By fostering collaboration between startups, financial institutions, and technology experts, FinTech Istanbul empowers the development of secure, scalable, and cutting-edge solutions for the digital finance ecosystem.

The Role

We are seeking a Smart Contract / Blockchain Developer to join our team and contribute to the development of blockchain solutions for fintech applications, including decentralized finance (DeFi), tokenization, and secure transaction frameworks.

Key Responsibilities

Architect, implement, and deploy secure smart contracts for fintech and DeFi applications

Lead smart contract design decisions focusing on robustness, auditability, gas efficiency, and resilience against vulnerabilities

Mentor junior developers, perform code reviews, and establish best practices in blockchain security and testing

Collaborate with cross-functional teams (backend, product, compliance, and security) to align smart contract features with project goals

Support integration of on-chain solutions with off-chain systems (databases, APIs, wallets, and payment rails)

Qualifications

Solid understanding of tokenomics, DeFi mechanisms, and fintech applications

Strong testing and CI/CD workflow skills; experienced with Hardhat, Truffle, Foundry, or similar tools

Proven track record of writing secure contracts, familiarity with vulnerabilities (reentrancy, integer over/underflow, front-running, flash loans, etc.)

Experience with audits, formal verification, fuzz testing, or other advanced contract assurance techniques

Bonus Points

Experience across multiple EVM chains or Layer-2 / sidechains

Knowledge of cross-chain bridges, oracles, and token design

Contributions to open-source security tooling, audits, or published smart contract code

Hands-on experience developing and deploying smart contracts (Solidity / EVM-compatible) in production is BIG PLUS

Why Join us?

Work at the forefront of fintech innovation in globally

Collaborate with a talented, driven, and passionate team

Gain access to cutting-edge technologies and strategic projects transforming digital finance

Flexible and remote-friendly work environment

Opportunity to grow your skills and make a real impact in the Web3 and fintech ecosystems

FinTech İstanbul is an equal opportunity workplace. We celebrate diversity and are committed to creating an inclusive environment for all employees.