Job Title: Senior Backend Engineer -Fintech & AI

Company Name: Fitnext

Job Url: https://www.simplyhired.com/job/KCB83AAx_A6q2RSkDvYf18IhlLN4jdg7IUaO85mp4G_FtPGrVJT2PA

Job Description: Senior Backend Engineer -Fintech & AI
Fitnext
Remote

Job Details
Full-time
$100,000 - $140,000 a year
12 days ago
Qualifications
Authentication
Data encryption
7 years
Node.js
Financial transaction processing
Startup experience
Blockchain
High availability architecture
Scalable systems
AWS
Bank experience
Implementing APIs
Scalability
Developing and maintaining backend systems
S3
Serverless cloud services
GraphQL
DynamoDB
Distributed computing
Real-time data processing implementation
Senior level
AI
TypeScript
React Native
High availability
Analytics
AWS Lambda
Full Job Description
Senior Backend Engineer (Node.js + AWS Serverless | Fintech & AI)

Job Type: Full-time

Work Mode: Hybrid (Dubai) or Remote (Global)

About Us

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.

The Role

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
Requirements

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
Why Join Us

Build the backend foundation of a cutting-edge neobank
Work on complex problems in payments, real-time systems, and blockchain
Be part of an AI-first engineering culture
Flexible setup: Hybrid in Dubai or fully remote globally
Join a highly experienced, senior team with strong ownership and impact
Company website: https://fitnextconsulting.com/

Pay: $100,000.00 - $140,000.00 per year

Work Location: Remote