👨🏻‍💻 postech.work

Senior Full Stack Engineer – AI-Driven Fintech

Fitnext • 🌐 Remote • 💵 $100,000 - $200,000

Remote Posted 1 week, 1 day ago

Job Description

Job Title: Very Senior Full Stack Engineer – AI-Driven Fintech

Location: United Arab Emirates, United States, United Kingdom, China, India, Poland, Portugal (Remote)

Salary: $100,000 – $200,000 USD / FTE

Job Type: Full-Time

Important: Only candidates with an active and up-to-date LinkedIn profile will be considered for this role.

About the Company

We are building a whitelabel neobank powered by stablecoins, combining the reliability of modern fintech with AI-driven intelligence. Our app provides all the features of a digital bank — wallets, payments, transaction histories, dashboards — and includes an AI agent for smarter financial interactions.

We run a modern TypeScript stack end-to-end:

Frontend: React Native + Expo, Tamagui design system, Zustand + TanStack Query, GraphQL/REST, SSE/WebSockets

Backend: Serverless AWS (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge, Cognito, S3/CloudFront)

Tooling \& Observability: EAS OTA updates, Maestro/Detox E2E tests, Sentry, Better Stack, RudderStack Amplitude

Our AI-driven development culture integrates tools like Claude, Cursor, MCP servers to Figma, and more — making AI a core part of how we design, build, and ship software.

Role Summary

We are looking for a very senior Full Stack Engineer to deliver pixel-perfect financial apps while thriving in an environment where AI is a daily co-pilot. You will craft flawless UI in React Native, build secure serverless APIs, integrate blockchain payments, and leverage AI tools to accelerate development.

Responsibilities

Deliver production-ready, pixel-perfect UI in React Native + Expo, using Tamagui + Style Dictionary for design consistency

Own core neobank features: wallets, payments, transaction histories, onboarding, notifications

Build and maintain scalable serverless APIs (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge)

Integrate stablecoin/blockchain payment flows securely and in compliance with regulations

Implement real-time features with WebSockets and SSE, including AI-driven chat and streaming UX

Optimize for performance (Hermes, Reanimated, FlashList) and observability (Sentry, Better Stack)

Collaborate with design teams using Figma tokens Tamagui workflows

Actively leverage AI-driven development tools (Claude, Cursor, MCP integrations) to accelerate coding, testing, and prototyping

Contribute to AI-assisted engineering culture and explore new tools to increase team velocity

Mentor teammates and establish standards for AI + fintech development practices

Requirements

10+ years of engineering experience, with at least 5 years in mobile fintech apps

Proven ability to deliver complex, modern financial apps with secure flows and polished UI

Mastery of React Native + Expo with pixel-perfect UI/UX

Full stack experience in TypeScript, including serverless AWS backends

Experience with secure auth (Cognito, JWT, device secrets) and financial-grade data handling

Familiarity with stablecoins, blockchain transactions, or payment APIs

Strong knowledge of real-time networking (WebSockets, SSE)

Comfortable working with AI tools in daily development (Claude, Cursor, AI-assisted IDEs)

Passion for pushing the frontier of AI-driven software development

Why Join Us

Build a world-class whitelabel neobank with AI at its core

Work in a modern, unified TypeScript stack across frontend and backend

Shape the future of AI-driven engineering

Tackle complex problems in fintech UX, payments, real-time systems, and blockchain

Join a remote-first, senior team emphasizing ownership, quality, and innovation.

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