FitNext Co.

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more. Role Description We are seeking a very senior Backend Engineer with expert-level experience in Node.js, TypeScript, and serverless AWS architecture. You’ll own core backend systems that power our neobank: payments, wallets, secure authentication, event-driven pipelines, and streaming infrastructures. You’ll work at the intersection of fintech, blockchain, event streaming, and AI, designing mission-critical systems with strong security, compliance, and performance guarantees. This role is ideal for engineers who thrive in fast-moving, high-ownership environments and love pushing what’s possible with AI-assisted development. Key Responsibilities - 10+ years of software engineering experience, with a strong backend record. - Deep expertise in Node.js + TypeScript building distributed systems or financial platforms. - Strong hands-on experience with serverless AWS (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge, Cognito). - Experience designing secure, compliant financial flows (payments, wallets, KYC, auth, etc.). - Solid understanding of real-time protocols: WebSockets, SSE. - Familiarity with stablecoins, blockchain payment flows, or modern payments APIs. - Able to contribute to React Native when needed (not the main focus). - Comfortable in an engineering environment where AI is actively used every day. - Passion for pushing the frontier of AI-driven development, not just adapting to it. Qualifications - 10+ years of professional software engineering experience. - Deep expertise in Node.js + TypeScript, building distributed or financial systems. - Strong hands-on experience with serverless AWS: Lambda, API Gateway, DynamoDB, Kinesis, EventBridge, and Cognito. - Experience designing secure, compliant financial flows (payments, wallets, KYC, identity, auth). - Solid understanding of real-time protocols (WebSockets, SSE). - Familiarity with stablecoins, blockchain transaction flows, or modern payment APIs. Requirements - Ability to contribute to React Native when necessary. - Comfortable in high-AI-usage engineering environments. - Passion for pushing the frontier of AI-driven software development. Benefits - Build a world-class, AI-powered fintech infrastructure platform. - Work in a modern unified TypeScript stack across backend and mobile. - Shape the future of AI-driven engineering workflows. - Solve complex challenges in payments, blockchain, event streaming, reliability, and security. - Join a senior, globally distributed team that values ownership, excellence, and innovation. Interview Process - Introduction with CTO and Head of Engineering. - Technical interview + take-home assessment (45–60 min).

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more. Role Description We are seeking a very senior Frontend Engineer (with strong full-stack skills) to build and scale world-class mobile financial applications. You’ll be working at the intersection of fintech, blockchain, and AI - delivering flawless UI/UX, crafting secure APIs, and accelerating development using cutting-edge AI tools. This role is ideal for someone who thrives in fast-moving, high-ownership environments. Key Responsibilities - Develop production-grade, pixel-perfect UIs in React Native + Expo, using Tamagui + Style Dictionary for design consistency. - Own critical features including: wallets, payments, onboarding, notifications, and transaction histories. - Build and maintain scalable serverless APIs (Lambda, API Gateway, DynamoDB, Kinesis, EventBridge). - Integrate stablecoin / blockchain payment flows with regulatory-grade security. - Implement real-time experiences with WebSockets and SSE, including AI-driven chat and streaming UX. - Optimize performance (Hermes, Reanimated, FlashList) and ensure high observability (Sentry, Better Stack). - Collaborate closely with design using Figma → Tokens → Tamagui workflows. - Actively leverage AI development tools (Claude, Cursor, MCP integrations) to accelerate delivery. - Contribute to AI-assisted engineering best practices and mentor other engineers. Qualifications - 10+ years of professional engineering experience, with 5+ years building mobile fintech apps. - Proven track record delivering complex, secure financial products with high-quality UX/UI. - Expert-level proficiency in React Native + Expo. - Solid full-stack background with TypeScript and serverless AWS architecture. - Strong understanding of secure authentication (Cognito, JWT, device secrets) and data protection. - Experience with stablecoins, blockchain transactions, or payment API integrations. - Strong knowledge of real-time networking (WebSockets, SSE). - Comfortable using AI tools in day-to-day development. - Passion for innovation and setting new standards in AI-driven software engineering. Benefits - Build a world-class, AI-powered fintech platform. - Work in a modern, unified TypeScript stack. - Shape the future of AI-driven engineering. - Tackle complex problems in fintech UX, payments, real-time systems, and blockchain. - Join a senior, remote-first team that values ownership, quality, and innovation. Interview Process - (No live coding) - Introductory conversation with CTO and Head of Engineering - Technical interview and take-home assessment (45–60 min)