Full-Stack Engineer for IoT-Driven Warehouse & Fridges

FELFEL AG; Zürich; On-site; CHF 90,000 - 130,000; Full time

Benefits offered by this job

5 weeks holiday per year

Work from anywhere 2 weeks per year

Pension fund

Public transport allowance

Team events

Job summary

FELFEL AG in Zurich seeks a versatile Full Stack Software Engineer (100%) to build systems spanning warehouse automation to a customer-facing POS Android app. You will own backend and GraphQL services, integrate payments, ERP, and partner systems, and contribute to on-site testing with warehouse staff.

The role emphasizes end-to-end ownership, on-call readiness, and close collaboration with end users to translate problems into reliable software solutions.

Qualifications

• Production experience in at least one typed backend language and one frontend framework.
• Experience owning software in production, including on-call duties and debugging from logs.
• Familiarity with C#, TypeScript, Android, and Kotlin.
• Exposure to hardware, IoT, payments, logistics, or Odoo environments is advantageous.
• Ability to learn quickly and ship reliable code.

Responsibilities

• Own warehouse and supplier web apps used daily for inbound processing, picking, labeling, and inventory.
• Develop and maintain the internal back-office tool, including the backend and GraphQL API that runs menus, deliveries, inventory, and customer sites.
• Manage the service connecting automated picking lanes to ensure uninterrupted warehouse operations.
• Maintain and update the Point of Sale Android app running on hundreds of fridges, managing the release process for the fleet.
• Integrate and support payment systems (Card, TWINT), ERP, and other partner integrations.
• Participate in on-call rotation to debug live issues with operations team.
• Visit the warehouse on-site to test changes and gather feedback from end users.
• Translate vague problems from non-technical colleagues into shipped solutions.
• Own production deployments, managing logs, alerts, and rollout plans with rollback.

Skills

C#

Java

Kotlin

TypeScript

React

On-call experience

Tools

GraphQL API

Android

Job description

FELFEL AG in Zurich seeks a versatile Full Stack Software Engineer (100%) to build systems spanning warehouse automation to a customer-facing POS Android app. You will own backend and GraphQL services, integrate payments, ERP, and partner systems, and contribute to on-site testing with warehouse staff.

The role emphasizes end-to-end ownership, on-call readiness, and close collaboration with end users to translate problems into reliable software solutions.