Senior Backend Engineer

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., * 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

• 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+).

• 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 Cursor subscription plus access to Claude Code and Codex.
• 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.

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.