Senior Full-Stack Developer (TypeScript / AWS / PostgreSQL / Amazon SP-API)

Description

Summary: eHigher is seeking a Senior Full-Stack Developer to build and scale backend systems for AMZBrain, an AI-powered platform optimizing Amazon product listings. Highlights: 1. Work on an AI-powered platform for Amazon sellers (AMZBrain) 2. Focus on building and scaling backend systems 3. Contribute to system architecture and technical decision-making **Please note:** **This is a remote position, open to candidates based in Serbia with a valid work permit.** ------------------------------------------------------------------------------------------------------------ **Working hours:** Flexible, with some overlap with US business hours preferred. **About** **eHigher** --------------------- Hi, we're eHigher. We help brands scale their online presence by building strong teams, structuring operations, and driving performance across marketplaces and D2C. **Role Overview** ----------------- We are looking for a Senior Full\-Stack Developer to join us and work on **AMZBrain**, an AI\-powered platform designed to help Amazon sellers optimize product listings and backend attributes at scale. This role focuses on building and scaling backend systems, working with Amazon SP\-API integrations, and contributing to the overall architecture of a product built for performance, automation, and large\-scale data processing. **Responsibilities** -------------------- * Develop and maintain backend services for the AMZBrain platform * Work with Amazon SP\-API integrations to retrieve and process seller data * Design and maintain scalable cloud infrastructure on AWS * Build and maintain APIs and backend logic using TypeScript * Design efficient data models and queries using PostgreSQL * Collaborate with product and engineering teams to ship features quickly * Improve performance, scalability, and reliability of the platform * Contribute to system architecture and technical decision\-making **Requirements** ---------------- * Strong software engineering fundamentals * Advanced experience with TypeScript * Experience building backend services and APIs * Strong experience with PostgreSQL * Experience working with AWS cloud infrastructure * Ability to design scalable and maintainable systems * Experience working in fast\-paced, startup\-style environments * Fluent in English (business level) **Nice to Have** ---------------- * Experience integrating with Amazon Selling Partner API (SP\-API) * Experience working with AI or data processing pipelines * Experience building SaaS platforms * Understanding of Amazon seller ecosystems or e\-commerce tools **Engagement Details** ---------------------- * Full\-time role * Remote, Serbia\-based * Flexible working hours with partial overlap with US teams preferred **Selection Process** --------------------- * Self\-introduction video (2–5 minutes) — may be required for certain roles * Initial screening interview with the Talent Acquisition team * Possible technical assessment or case study * Interview(s) with engineering leadership * Final decision and offer