Lead Backend Developer

About Us

We're building the next generation of smart calculators for modern retailers — tools that go far beyond basic math. These devices integrate dynamic QR code generation, digital payments, inventory tracking, and more. Think of it as a POS terminal disguised as a calculator — but way smarter.

Our mission is simple yet ambitious : to replace over 30 million traditional calculators sitting on shop counters across the world. If you're passionate about creating intuitive, impactful hardware + software systems that empower everyday users — join us in redefining what a calculator can do.

About the Job

We are looking for a hands-on  Backend Lead Engineer  to own, scale, and optimize the backend systems powering our next-generation smart calculator ecosystem. This role involves leading backend architecture, mentoring engineers, and building robust services that support payments, IoT device sync, inventory, and real-time retail workflows.

The ideal candidate enjoys designing large-scale distributed systems, writing clean and reliable backend code, and working closely with cross-functional teams across firmware, app, and DevOps. This role is ideal for engineers who want deep ownership, architectural influence, and the opportunity to shape the technical foundation of a fast-growing product.

Key Responsibilities

Backend Architecture & Development

• Design and develop scalable backend services using Java / Kotlin and Spring Boot.
• Build and maintain APIs for payments, inventory, device sync, and retail workflows.
• Optimize system performance, database queries, and API latency for real-world usage.
• Lead architectural decisions in collaboration with the CTO and Engineering Manager.

Technical Leadership & Mentorship

Cross-Functional Collaboration

System Reliability & Operations

Required Skills

Qualifications

Optional / Nice-to-Have Skills