Senior Blockchain Engineer

We've been building digital products for over 10 years, with a strong focus on Blockchain-based applications. At 4soft, people come first - it's our team of passionate technologists that enables us to work with international clients and deliver innovative solutions. We believe in transparency, effective teamwork, and achieving real business outcomes for those we serve.

As a Senior Blockchain Engineer, you’ll work directly with the client’s team as a dedicated engineer throughout the project. If you have experience building production financial infrastructure and care about the security of digital asset operations, this is your place. Tech environment: MPC / custodial wallet platforms (Fireblocks, DFNS or similar), API integrations, stablecoins, DeFi (vaults), Web3 As a Senior Blockchain Engineer, you will be responsible for: Helping scope a pilot that may initially include manual steps, and designing a path toward automation Building solutions on top of an MPC custody platform: lender and borrower accounts, collections wallets, transfers, and sweeps Defining transaction policies and pre-execution checks, including tight controls on permitted destinations Integrating outputs from an external calculation agent, or from internal calculations, without making smart contracts the primary money movement layer Designing and implementing automated wallet operations (deposit flows, sweeps, transfers) with a strong focus on security and auditability Collaborating with the client’s team,