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 Requirements Location: Candidates must be located in the EMEA or APAC regions. Technical Expertise: Strong professional experience with TypeScript and Node.js is required. Stellar Experience: Proven experience working with the Stellar network in production environments. Blockchain Background: Previous experience in the blockchain space with a technical understanding of the EVM ecosystem (or other blockchain environments). Familiarity with Stellar’s Soroban smart contracts is a significant plus. Seniority: Extensive professional experience in a similar role at a senior or lead level. Infrastructural Knowledge: Solid understanding of document databases (MongoDB), caching mechanisms (Redis), and system architecture design. Soft Skills: Excellent analytical, problem-solving, and communication skills. Ability to work both autonomously and collaboratively in a proactive manner. Education: A Bachelor’s or Master’s degree in Computer Science is considered a plus. Language: Very strong written and verbal English skills for effective stakeholder communication. Our Client's Culture Our client operates on a foundation of mutual respect, high accountability, and continuous growth. They are looking for teammates who resonate with the following core values: Embracing Differences: Our client values unique qualities and views individual differences as an opportunity for the entire team to grow. Ownership and Execution: Every team member is expected to own their tasks end-to-end, holding themselves to a high bar for execution and accountability. Failing Forward: Innovation requires courage. The team is encouraged to try new things, learn from mistakes without repeating them, and adapt quickly. Collaborative Fun: Beyond the tech, the team prioritizes getting to know one another, maintaining a light-hearted environment rooted in love and respect. Benefits Our client offers a comprehensive package designed to support a high-performing, remote-first team: Compensation: Competitive salary range of €90,000 – €130,000 EUR , plus equity participation from day one. Time Off: 30 days of Paid Time Off (PTO). Flexibility: Flexible remote work days and flexible working hours. Offsites: Annual team offsites (previous locations include Thailand, Vietnam, and Marrakech). Equipment: Choice of work computer and hardware. Allowances: * An annual €1,000 personal development budget (after 6 months of tenure). A one-time €1,000 remote work budget for office setup or coworking expenses. Note: Candidates joining as independent contractors are ent