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 Details Type: Part-Time / Freelance (Transition to Full-Time Core Team Role) Phase 1: Milestone-based engagement Phase 2: Full-time Core Team position with performance-based compensation and equity allocation Work Mode (For Phase 1): Remote, flexible hoursWe’re building something extraordinary — a next-generationdigital commerce and rewards platforminto a seamless experience. If you’re an experienced builder who wants toown , not just code,and architect the vision— this is your moment to be part of the founding story.Your Role You’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 Native Develop Admin, Vendor, and User Panels with role-based access control Manage 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 1 Collaborate with the founder on product architecture, sprints, and roadmap decisions Build and integrate: Wallets & redemption systems Reward & 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 Stack Frontend / Mobile Flutter (preferred) or React Native – cross-platform app (Android + iOS) Next.js / React.js – for Admin, Vendor, and Web Panels Deep understanding of responsive UI, modular components, and API integrationBackend / APIs Node.js (Express / NestJS)orDjango / FastAPI (Python) RESTful & WebSocket APIs, with a strong understanding ofmicroservices Integration with 3rd-party APIs (Affiliate, Ad SDKs, Payment, Game APIs, etc.) GraphQL (bonus)Database & Storage PostgreSQL / MySQL (core) MongoDB / Redis for caching and logs S3 / Cloud Storage for mediaInfra & DevOps AWS / GCP / Azure Docker / Kubernetes CI/CD: GitHub Actions / Jenkins Monitoring: Prometheus / Grafana / CloudWatchImportant to Have Experience in Reward Apps / Affiliate Platforms / Gaming / AdTech / FinTech Worked with multi-tenant vendor systems Knowledge of data pipelines and BI dashboards Familiarity 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.com Subject 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 systems Share your approach to system architecture and tech stack decisions Are 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?