Senior Backend Engineer -Fintech & AI

We're looking for a Senior Backend Engineer with strong experience in Node.js and AWS Serverless to design and scale secure, high-performance financial systems.

You'll play a key role in building the core infrastructure of our neobank - including payments, wallet systems, and real-time data pipelines - in an environment where AI is part of the daily engineering workflow.

What You'll Do

• Design, build, and scale serverless backend systems on AWS
• Develop secure and scalable REST and GraphQL APIs
• Own core backend features such as wallet infrastructure, payments, transaction processing, and onboarding
• Implement event-driven architectures and real-time systems (WebSockets, SSE)
• Integrate stablecoin and blockchain payment flows with security and compliance in mind
• Build high-throughput data pipelines for financial transactions and analytics
• Ensure financial-grade security (authentication, authorization, encryption best practices)
• Collaborate with frontend/mobile teams to deliver seamless product experiences
• Use AI tools to improve development speed, testing, and code quality
• Contribute to architecture decisions and backend best practices

Do you have experience in TypeScript?, * 7-10+ years of backend engineering experience

• Strong expertise in Node.js with TypeScript
• Proven experience building serverless architectures on AWS
• Solid background in fintech systems (payments, banking, wallets, or financial platforms)
• Experience with event-driven systems and real-time architectures
• Strong understanding of distributed systems, scalability, and high availability
• Experience with secure authentication and financial data handling (JWT, Cognito, encryption)
• Familiarity with stablecoins, blockchain, or crypto payments (strong plus)
• Comfortable working in an AI-augmented development environment
• Strong ownership mindset and ability to thrive in a senior team

Nice to Have

• Experience with React Native or full-stack environments
• Experience with analytics and data pipelines
• Previous work in high-growth fintech or startup environments

4.04.0 out of 5 stars Remote $100,000 - $140,000 a year - Full-time

We are building a next-generation whitelabel neobank powered by stablecoins, combining the reliability of modern fintech with the intelligence of AI agents. Our platform delivers core digital banking capabilities - including wallets, payments, transaction histories, and financial dashboards - enhanced by an embedded AI experience that enables smarter and more intuitive financial interactions. Our architecture is built on a modern TypeScript-first stack, focused on scalability and real-time systems: * Backend (Core): AWS Serverless (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge, Cognito, S3/CloudFront) * Frontend: React Native + Expo (nice to have) * APIs: REST / GraphQL * Real-time: WebSockets, SSE * Observability & Data: Sentry, Better Stack, RudderStack * Amplitude We operate with an AI-first engineering culture, leveraging tools like Claude, Cursor, and modern AI integrations to accelerate development and redefine how software is built.