Senior Backend Engineer - Stellar Ecosystem

Senior Backend Engineer Location: EMEA / EU Hours - Authorised to work in EMEA Remote | Full-time Compensation: €90K - €130K

Our client is a high-growth fintech leader specializing in simplifying multi-chain DeFi for traditional financial institutions, fintechs, and service providers. By offering a unified API, the platform provides seamless access to on-chain liquidity across all major blockchains for optimized same-chain and cross-chain swaps. The organization is on a mission to enable a fairer, decentralized world while prioritizing exceptional user experiences to make complex technologies accessible to a global audience.

The organization is seeking multiple Senior Backend Engineers to lead the design, development, and maintenance of robust, scalable, and secure backend systems. Reporting to the Backend Lead, the successful candidates will collaborate with cross-functional teams— including frontend developers, product managers, and designers—to deliver high-quality software solutions. The technical environment utilizes a modern stack including Node.js (TypeScript), MongoDB, Redis, and ethers.js, supported by a GitOps CD chain involving Kubernetes and AWS.

Key Responsibilities • System Leadership: Lead and participate in the design, development, and maintenance of backend systems and APIs. • Scalable Architecture: Architect and implement robust backend solutions capable of handling increasing user loads and evolving business requirements. • Quality Standards: Maintain high coding standards, conduct thorough code reviews, and ensure best practices for maintainability and readability. • Performance Optimization: Identify system bottlenecks and optimize code and algorithms to improve overall performance. • Proactive Monitoring: Implement monitoring and debugging tools to identify and resolve issues proactively, ensuring high system availability. • Testing & Reliability: Develop comprehensive test suites—including unit, integration, and end-to-end tests—to ensure backend reliability. • Mentorship: Provide guidance to junior developers to foster technical growth within the team. • Documentation: Document code, APIs, and technical processes to facilitate knowledge sharing and streamline onboarding.

Interview Process • Initial Screening: Recruiter / HR Call • Hiring Manager Interview: Discussion with the Backend Lead • Technical Assessment: Take-Home Test • Technical Deep-Dive: Technical Interview • Cultural Alignment: Group Interview