Senior Backend Engineer

About MONEI MONEI is revolutionizing omnichannel payments for top brands across Southern Europe. Our award-winning serverless architecture even earned recognition as the AWS Startup Architecture of the Year (Iberia region)! With rapid global expansion underway, we're building the future of payment processing—and we want you on our team. The Role As a full-time Senior Backend Engineer, you'll join a small, cross-functional product team building the backend systems that power MONEI. You'll make high-impact architectural decisions, tackle complex challenges, and help mentor junior engineers—all in an agile, collaborative environment where your ideas truly matter. What You'll Do Build Robust Payment Solutions: Develop backend services that ensure a seamless digital and physical payment experience. Shape Our Architecture: Collaborate with seasoned engineers to define and implement scalable, serverless systems on AWS. Mentor & Lead: Guide 1-2 junior developers, fostering their growth and ensuring the highest coding standards. Ship Fast with AI: Leverage Cursor, Claude Code, and Codex to move quickly on non-trivial backend work without sacrificing quality. Drive Innovation: Contribute to team discussions, propose improvements, and help steer the evolution of our tech stack and platform. Our Stack Language: TypeScript + Node.js Compute: AWS Lambda (serverless-first, not EC2) Data: DynamoDB, OpenSearch Messaging: SQS, SNS, Kinesis API: GraphQL via AWS AppSync IaC: CDK / Serverless Framework What You'll Need Experience: 5-7+ years in a demanding software engineering role. Technical Skills: Strong expertise in TypeScript and Node.js. AWS Mastery: Proven experience building, testing, and deploying distributed, highly available serverless systems on AWS. Tooling & Methodologies: Microservices, event-driven programming, and automated testing. Coding Fundamentals: Strong coding skills without AI assistance, verified in our live coding interview. We encourage AI tools, but you must understand and critically evaluate what they produce—no blind vibe-coding. Communication: Excellent English skills and the ability to work both independently and collaboratively in a remote setting. Bonus Points Fluency with AI coding tools (Cursor, Claude Code, Codex). We believe in AI-leveraged development. AWS certification. Experience with fintech, payment platforms, or SaaS products. Expertise in handling high-load systems and addressing scalability challenges. Background in fast-paced startup environments. Spanish language proficiency (B2+). What We Offer Competitive Compensation: Aligned with your expertise and experience. Remote Flexibility: Work 100% remotely, with the option to use our offices in Málaga or Barcelona if you're nearby. AI Tools on Us: Full subscription plus access. Flexible Hours & PTO: Enjoy work-life balance with flexible scheduling and a generous paid time off policy. Dynamic Culture: Join a small, cross-functional product team dedicated to innovation and excellence in payments technology. Ready to Shape the Future of Payments? If you're excited to tackle complex problems and make a real impact in the fintech world, we want to hear from you! Click the "Apply" button to send us your application . Join us at MONEI and help redefine the payment experience for brands worldwide!