Fullstack Developer, Growth & Conversion

🏢 Singit · all Singit jobs
📍 Israel
📅 Posted 2026-08-23 · via Himalayas
🏷 Full-Stack-Engineer,Fullstack-Development,Growth-Engineering,Conversion-Rate-Optimization,Product-Engineering,Full-Stack-Developer,Senior-Fullstack-Developer,Martech,Full-Stack-Web-Developer
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We are hiring a highly product-focused Fullstack Developer to take complete technical ownership of our marketing and conversion systems . You will be the architect and primary builder for everything related to user acquisition and revenue generation—from first click to subscription.

This is a high-impact role where your code directly translates to business metrics, focusing on dynamic funnel optimization, pricing strategies, A/B testing, and comprehensive analytics implementation.

What You’ll Do (Core Responsibilities)

Your primary focus will be on driving conversion across web and native platforms:

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Conversion Funnel Ownership: Design, develop, and own all B2C conversion assets, including dynamic pricing pages, registration funnels (which includes the web view funnel and native flows), and complex checkout flows.

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Rapid Iteration & Experimentation (CRO): Implement a high-velocity experimentation framework to allow for rapid A/B testing of funnel logic, pricing variations, questionnaire changes, designs, and animations.

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Advanced Analytics & Data Flow: Implement and maintain robust, server-side event tracking, ensuring high data quality and integrity for critical marketing systems.

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Marketing Integrations: Manage deep integrations with our marketing partners (e.g., AppsFlyer ), advertising platforms (e.g., Facebook Conversions API, Google Ads), and business intelligence tools.

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Data Warehousing: Ensure all necessary event data is accurately captured and routed to our internal data warehouse ( BigQuery ) for reporting and business analysis.

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Product Collaboration: Work directly with Marketing and Product teams to translate growth strategies into scalable, performant, and reliable code.

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User Communication & Notifications: Own the technical implementation, delivery, and integration of user notification systems (push, in-app messaging, and email hooks) to support re-engagement and lifecycle marketing efforts.

Our Stack

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Frontend: React, React Native

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Backend: Node.js, MongoDB

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Infrastructure: AWS (ECS, S3, EC2)

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Tools: GitHub Copilot, AI-assisted workflows, various marketing/analytics platforms.

Key Requirements

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4–5+ years of fullstack development experience, ideally in a fast-paced B2C environment .

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Strong expertise in React and React Native with a keen eye for front-end performance optimization and UI/UX designed for conversion.

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Solid backend skills with Node.js and MongoDB for supporting APIs that power dynamic funnels and handle server-side tracking.

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Mandatory: Deep, demonstrable experience with marketing event tracking, pixels, and server-side integrations (e.g., Facebook CAPI, Google Analytics, GTM).

- Comfort working with RESTful APIs and managing end-to-end features.

- Experience deploying to AWS (ECS, S3, EC2).

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Strong product intuition and a proven ownership mindset for high-value features.

Bonus Skills

- Prior experience building and maintaining A/B testing/experimentation frameworks (e.g., Optimizely, LaunchDarkly, in-house tools).

- CI/CD, A/B testing frameworks

- Experience querying or managing data flow into BigQuery (BQ) .

- Familiarity with Angular or other legacy frontend frameworks.

- Python or scripting for backend tools and data processing.

- UI/UX sensibility and attention to detail

Why Join Singit

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Direct Impact: You will be responsible for the code that directly drives company revenue and growth metrics.

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High Autonomy: Own the entire technical growth stack and help shape our acquisition strategy.

- Work in a creative, fast-moving team dedicated to making language learning fun.

- Flexible work culture focused on impact

Originally posted on Himalayas

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