Who we are? We’re at the core of fintech innovation, building a decentralized financial ecosystem that merges traditional banking with blockchain and AI. Our mission is to make wealth accessible to all through products like hybrid card-crypto wallets, used by 70,000+ paying clients across 40+ countries. We’re a worldwide team working remotely from over 20 countries, operating from Dubai, seeking a Principal Blockchain & Backend Engineer to own a product vertical.
Philosophy You tackle complex challenges, understand the business, and deliver value at a breakneck pace. We value flexibility, autonomy, proactivity, and the ability to thrive when Fridays and weekends are peak days.
Role Overview
As Principal Blockchain & Backend Engineer, you will own the design, development, and optimization of the blockchain layer and its integrations with the wider product ecosystem, particularly backend systems. This is a hybrid role — ideal for someone who has deep hands-on blockchain expertise and enjoys broader backend engineering challenges.
You’ll architect secure and efficient smart contract systems for token flows, vesting, farming, and energy rewards — ensuring interoperability between chains and the wallet services.
Key Responsibilities System Integration * Collaborate with backend team on event-driven architectures (Kafka, NestJS microservices) to synchronize blockchain and off-chain events: * Build and maintain APIs for internal services * Integrate with custodial partners and monitor on-chain operations tied to DeFi and card use cases.
Blockchain Architecture & Development * Design and maintain blockchain modules (EVM based) supporting token minting and vesting logic * Develop and optimize smart contracts on Solidity for the token management across BSC and our chain. * Implement cross-chain bridges and token migration logic between our chain ↔ BNB Chain (and other supported networks). * Ensure on-chain data integrity and event publishing for Kafka-based microservice integrations.
Security & Reliability * Implement multi-signature transaction flows, claim limits, and validation logic. * Conduct and supervise smart contract audits and testing procedures. * Establish on-chain monitoring, alerting, and incident response standards for validators and nodes.
Culture & Collaboration * Review architecture proposals and ensure alignment with tokenomics and business logic. * Work closely with the CTO and Product Owner and Contribute to building engineering processes in an early-stage environment. * Collaborate with Delivery Manager for rapid product delivery.
Additional Requirements * 7+ years of backend and blockchain software engineering experience, focusing on scalable systems. * Hand-on experience to modernize legacy systems and integrate new solutions * Fluent English (written/spoken)
What else is important * Location: Dubai-based or remote in EU timezone. Covered business trips every 2-3 months are possible. * Close collaboration with three tech leads, CTO, and a delivery manager in a star team. * Culture: Zero tolerance for conflicts, focus on business and results.
Team Structure * Developers report directly to technical leads; everyone codes hands-on. * The team for the role currently includes 3 backend engineers, a CTO with a close collaboration with a Delivery Manager with plans to expand gradually. Besides, there is Front-End Team, QA support and a small mobile team. * Collaboration happens across time zones (mostly EU and Dubai), so flexibility and responsiveness are key. * The culture is direct, transparent, and autonomous.
Our benefits * Be among the first 10 core engineers in a fast-scaling company. * Flat structure, no micromanagement, and direct impact on the product’s success. * B2B contract with paid vacation. * Access to top DeFi conferences, including our own events.
Recruitment process * Intro call with recruiter (30 minutes) * Non-technical interview with a Delivery Manager to discuss general role questions and the product (30 minutes) * Technical Interview (1 hour) * Final interview with founder (1 hour) * Offer and onboarding
