Senior Full Stack Engineer (AI-Driven Fintech Platform)

Madfish; United Kingdom; Hybrid; GBP 82,000 - 113,000; Full time

Job summary

A fintech innovation company is seeking a Senior Full Stack Engineer to develop a customizable digital banking platform. This role entails building high-quality user interfaces, designing secure, scalable APIs, and adopting AI tools to enhance project execution. Candidates should have over 10 years of engineering experience, particularly in mobile financial systems, and expertise in TypeScript and React Native. The position offers hybrid working arrangements and relocation support to Dubai.

Qualifications

• 10+ years of engineering experience, with 5+ years in fintech or mobile financial systems.
• Proven track record of delivering secure, high-quality apps.
• Deep familiarity with AWS Serverless and real-time systems.

Responsibilities

• Build polished, high-performance UI using React Native + Expo.
• Design and maintain serverless APIs on AWS.
• Integrate blockchain-based payments ensuring security and compliance.

Skills

React Native + Expo

TypeScript

AWS Serverless stack

WebSockets/SSE

AI-powered development tools

Job description

We’re developing a customizable digital banking platform built on stablecoin infrastructure — a fusion of modern fintech reliability and AI-powered intelligence.
Our product provides all the essentials of a neobank: wallets, payments, transaction tracking, analytics dashboards, and integrates an in-house AI assistant that enhances user experience through smart financial insights and automation.

Tech Stack

Our entire ecosystem is powered by TypeScript, running seamlessly across the frontend and backend.

Frontend: React Native with Expo, Tamagui UI framework, Zustand + TanStack Query for state/data, GraphQL & REST APIs, and real-time communication via SSE/WebSockets.
Backend: AWS Serverless (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge, Cognito, S3/CloudFront).
Tooling & Monitoring: EAS OTA updates, Maestro/Detox for E2E testing, Sentry, Better Stack, RudderStack → Amplitude.

We embrace a deeply AI-integrated workflow — using tools like Claude, Cursor, and MCP-based design connectors (e.g. Figma integrations) to enhance velocity, creativity, and precision.
For us, AI is part of the engineering DNA, not a side feature.

The Opportunity

We’re looking for a senior Full Stack Engineer who can build secure, polished fintech apps and thrive in an environment where AI is a daily co-pilot.
You’ll craft high-quality interfaces, design scalable APIs, and actively adopt AI tools to work faster and smarter.

This role is based in Dubai — relocation is required but supported. We’ll help make the move smooth and well-planned, at a comfortable pace.
Our setup is hybrid: several days a week in the office for collaboration, with flexibility to work remotely for the rest.

Responsibilities

• Build polished, high-performance UI in React Native + Expo, maintaining visual consistency through Tamagui/Style Dictionary.
• Develop key neobank modules: wallets, payment flows, onboarding, transaction history, notifications.
• Design and maintain serverless APIs on AWS (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge).
• Integrate stablecoin and blockchain-based payments, ensuring top-tier security and compliance.
• Implement real-time functionality (SSE/WebSockets) for streaming data and AI-driven conversations.
• Focus on app optimization (Hermes, Reanimated, FlashList) and observability (Sentry, Better Stack).
• Collaborate closely with designers using Figma token-based workflows.
• Adopt and refine AI-assisted tools (Claude, Cursor, MCP) for faster prototyping and testing.
• Contribute to best practices in AI-augmented software engineering.
• Mentor engineers and uphold technical excellence in the AI + fintech space.

Requirements

• 10+ years of engineering experience (5+ in fintech or mobile financial systems).
• Proven delivery of secure, high-quality apps with modern UI/UX.
• Expert-level skills in React Native + Expo and TypeScript.
• Deep familiarity with AWS Serverless stack and real-time systems.
• Experience with secure authentication (Cognito, JWT, device secrets) and data protection.
• Understanding of stablecoin or blockchain payment mechanics.
• Hands-on with WebSockets/SSE and scalable API design.
• Regular use of AI-powered development tools (e.g. Claude, Cursor, GitHub Copilot, or similar).
• A growth mindset and enthusiasm for redefining software development with AI.

Why You’ll Love Working Here

• Shape a next-generation AI-centric neobank from the ground up.
• Work within a unified, cutting-edge TypeScript ecosystem.
• Be part of an AI-native engineering culture — we don’t just use AI, we evolve with it.
• Solve deep challenges in fintech, blockchain, and real-time user experience.