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EER PolandEP

Senior Full Stack Engineer / AI-Powered Fintech

EER Poland
United States only

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What You’ll Do:

  • Build production-ready, pixel-perfect UI in React Native + Expo using Tamagui and Style Dictionary
  • Own and deliver core neobank features: wallets, payments, transaction histories, onboarding, notifications
  • Develop and maintain scalable serverless APIs with AWS Lambda, API Gateway, DynamoDB, Kinesis, EventBridge
  • Integrate stablecoin and blockchain payment flows with a focus on security and compliance
  • Implement real-time features using 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 development tools (Claude, Cursor, MCP integrations) to accelerate coding, testing, and prototyping
  • Contribute to our AI-assisted engineering culture, exploring and integrating new tools to increase velocity
  • Mentor teammates and help define engineering standards for AI + fintech development

🎯 What We’re Looking For:

  • 10+ years of engineering experience, including 5+ years in mobile fintech apps
  • Proven ability to deliver secure, complex financial applications with beautiful UI
  • Mastery of React Native + Expo and a strong eye for pixel-perfect UX
  • Full stack proficiency in TypeScript, including serverless AWS backends
  • Experience with secure authentication (Cognito, JWT, device secrets) and financial-grade data handling
  • Familiarity with stablecoins, blockchain transactions, or payments APIs
  • Strong understanding of real-time networking (WebSockets, SSE)
  • Comfortable using AI tooling in daily development — ideally already working with Claude, Cursor, or AI-assisted IDEs
  • Passionate about 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 TypeScript stack across frontend and backend
  • Help shape the future of AI-assisted engineering — we’re not just using AI, we’re pioneering how it’s done
  • Solve hard problems in fintech UX, payments, real-time systems, and blockchain
  • Join a remote-first, senior team where ownership, polish, and innovation come first

About the job

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Posted on

Job type

Full Time

Experience level

Experience

10 years minimum

Location requirements

Hiring timezones

United States +/- 0 hours
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