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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Engineer -Fintech & AI - **Company:** FITNEXT LLC - **Location:** United States (Remote available) - **Experience:** Expert - **Salary:** $100,000.0 - $140,000.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, User Authentication, Software Quality, Distributed Systems, Integrated Development Environments, Node.Js, Blockchain, TypeScript, WebSocket, Transaction Processing (Computing), Real Time Systems, System Availability, Backend, Event Driven Architecture, Graphql, React Native, Front End Software Development, Data Pipelines, Serverless Computing - **Published:** May 19, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=f17b6bafe405146f ## About the Role 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 ## Description 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 ## Related Videos - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Stop using Node.js like in 2020! What changed and what you can do today with Node.js](https://www.wearedevelopers.com/videos/100011-stop-using-node-js-like-in-2020-what-changed-and-what-you-can-do-today-with-node-js) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) ## Related Articles - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 159: AI Pipelines, 10x Faster TypeScript, How to Interview](https://www.wearedevelopers.com/magazine/563-dev-digest-159-ai-pipelines-10x-faster-typescript-how-to-interview) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [How Much FAANG Companies Actually Pay Software Engineers in 2025](https://www.wearedevelopers.com/magazine/230-how-much-faang-companies-actually-pay-software-engineers-in-2025) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023)