Senior Full Stack Engineer, Marketing & Growth Role Overview ProphetX is seeking a Senior Full Stack Engineer to own a dedicated engineering swim lane focused on growth-driven product capabilities, including promotions, onboarding, loyalty, referrals, personalization, and lifecycle enablement. This is a frontend-leaning role (~70% FE / ~30% BE) designed for a small, fast-moving team. You will take marketing and growth initiatives from concept through production independently, translating business requirements into scalable technical solutions, shipping efficiently, and iterating based on performance data. This role partners closely with Marketing, Product, and Data but operates with clear ownership and autonomy. Key Responsibilities & Areas of Ownership Cross-Functional and Frontend Contribution - Contribute to frontend development in Vue.js or React - Support React Native implementations for marketing-adjacent mobile features such as deep links, push flows, and in-app prompts - Collaborate with engineering peers through code reviews and shared standards to maintain quality and consistency Growth Analytics and Martech Integration - Instrument events and funnels across web and mobile growth features - Maintain and integrate analytics pipelines and attribution SDKs - Integrate third-party marketing, CRM, advertising, and growth platforms across backend and frontend - Ensure data reliability to support experimentation, campaign optimization, and reporting - Partner with Marketing and Product to validate impact and inform prioritization - Identify gaps in the marketing technology stack and propose scalable, pragmatic solutions Personalization, Loyalty & Activation - Build systems that enable behavior-based and value-based personalization - Support loyalty mechanics including tiers, thresholds, and engagement rewards - Improve onboarding and KYC flows to reduce friction and accelerate time to first action - Enable experimentation across activation and retention initiatives without creating unnecessary engineering overhead Growth Systems Architecture and Ownership - Design, build, and maintain backend systems powering promotions, incentives, and lifecycle mechanics - Implement deposit matches, bonuses, discounts, registration incentives, and similar features - Develop rules engines for eligibility, targeting, caps, expirations, personalization, and VIP use cases - Ensure systems are scalable, configurable, and built for rapid iteration - Own reliability, observability, documentation, and long-term maintainability of growth services - Write appropriate test coverage for revenue-impacting functionality Qualifications Core Engineering Experience - 5+ years of professional software engineering experience with strong frontend fundamentals on both web and mobile - Familiarity with web and mobile real-time communication patterns such as WebSockets - Experience integrating and managing third-party UIs and APIs at scale, including authentication flows, rate limiting, and webhook handling - Production experience building and maintaining services in Go - Experience designing and consuming RESTful APIs - Experience with event-driven architecture patterns such as Kafka, SQS, or pub/sub systems Full Stack and Mobile - Working knowledge of modern web frameworks such as Vue.js or React - Experience contributing to React Native codebases and shipping marketing-adjacent mobile features such as deep links, push notifications, and in-app messaging - Experience integrating analytics, attribution, and marketing SDKs on the frontend Growth and Marketing Systems - Experience working within modern marketing and growth technology stacks, including analytics, CRM, attribution, and advertising platforms - Understanding of attribution modeling, identity resolution, and conversion tracking - Experience building or maintaining data pipelines that support campaign automation, reporting, and experimentation Nice to Have - Experience in sports betting, gaming, or fintech - Familiarity with CDPs (Customer Data Platforms) such as Segment or Customer.io - Experience with A/B testing infrastructure or feature flagging systems - Background working within a regulated industry