Senior Full Stack Developer

Senior Full Stack Developer (MERN + Flutter/React Native)- Part TimePlease read the JD properly before applying P.S.: This role is not suitable for someone with less than 4 years of experience.Engagement DetailsType: Part-Time / Freelance (Transition to Full-Time Core Team Role)Phase 1: Milestone-based engagementPhase 2: Full-time Core Team position with performance-based compensation and equity allocationWork Mode (For Phase 1): Remote, flexible hoursWe’re building something extraordinary — a next-generation digital commerce and rewards platform into a seamless experience. If you’re an experienced builder who wants to own, not just code, and architect the vision — this is your moment to be part of the founding story.Your RoleYou’ll help build the backend architecture, frontend systems, mobile apps, and integrations — collaborating directly with the founder to bring this project from 0 → 1.This is a Phase 1 milestone-based engagement that transitions into a full-time core founding role with equity for the right candidate.Key ResponsibilitiesArchitect, develop, test, and deploy a complete e-commerce + rewards ecosystem (Backend + Admin + App) using MERN Stack and Flutter / React NativeDevelop Admin, Vendor, and User Panels with role-based access controlManage API integrations (payments, wallets, affiliate SDKs, game APIs, etc.)Own DevOps, CI/CD pipelines, and cloud infrastructure (AWS/GCP)Ensure security, scalability, and modularity from Day 1Collaborate with the founder on product architecture, sprints, and roadmap decisionsBuild and integrate:Wallets & redemption systemsReward & affiliate engines (postback/S2S integrations with networks like CashKaro, GrabOn, etc.)Ad & gaming modules (banner/video/survey APIs)Notifications, analytics, and fraud detection layersRequired Skills & Experience✅ MERN Stack Expertise – 5+ years of hands-on experience with MongoDB, Express, React, and Node.js✅ E-commerce / Marketplace Systems – Proven record in building end-to-end platforms✅ Reward / Affiliate Systems – Deep understanding of postback, cashback, or gamification integrations✅ Cloud & DevOps – AWS/GCP setup, CI/CD pipeline management, containerization (Docker/Kubernetes)✅ Security & Data Handling – Role-based access, JWT, encryption, fraud detection✅ Mobile-first Development – Experience integrating Flutter or React Native apps✅ Ownership Mindset – Strategic thinker with the ability to build fast, adapt fast, and ship cleanIdeal Tech StackFrontend / MobileFlutter (preferred) or React Native – cross-platform app (Android + iOS)Next.js / React.js – for Admin, Vendor, and Web PanelsDeep understanding of responsive UI, modular components, and API integrationBackend / APIsNode.js (Express / NestJS) or Django / FastAPI (Python)RESTful & WebSocket APIs, with a strong understanding of microservicesIntegration with 3rd-party APIs (Affiliate, Ad SDKs, Payment, Game APIs, etc.)GraphQL (bonus)Database & StoragePostgreSQL / MySQL (core)MongoDB / Redis for caching and logsS3 / Cloud Storage for mediaInfra & DevOpsAWS / GCP / AzureDocker / KubernetesCI/CD: GitHub Actions / JenkinsMonitoring: Prometheus / Grafana / CloudWatchImportant to HaveExperience in Reward Apps / Affiliate Platforms / Gaming / AdTech / FinTechWorked with multi-tenant vendor systemsKnowledge of data pipelines and BI dashboardsFamiliarity with AI personalization (TensorFlow Lite / OpenAI APIs)Entrepreneurial mindset with a bias for speed, clarity, and ownershipHow to Apply📧 Send your application to arc@hillqueentea.comSubject Line: “Full Stack Developer (Core Team)– [Your Name]”Include:Links to live projects (especially in e-commerce, reward, or affiliate domains)Describe your experience with affiliate, reward, or gamification-based systemsShare your approach to system architecture and tech stack decisionsAre you open to joining as a core founding member with a milestone-based structure?Describe your experience with cloud deployments (AWS/GCP) and DevOps workflows.What excites you about working on an early-stage project with milestone-based compensation?How many hours can you dedicate to this project?