About Gapstars
At Gapstars, we partner with some of Europe's most ambitious companies, from disruptive tech startups to established Benelux accounting firms, helping them build high-performing teams in engineering and finance.

Headquartered in the Netherlands, with talent hubs in Sri Lanka and Portugal, we are home to 300+ professionals who thrive on solving real-world challenges with modern solutions. Our teams work across domains, from networking, marketplaces, SaaS, and AI to embedded finance and accounting, delivering scalable solutions that drive meaningful outcomes.

About the Role

We are looking for a freelance Senior Swift Engineer to provide technical consultancy support to one of our clients. The role will focus on complex iOS development and mobile application integration with connected hardware.

The consultant will provide support as required, with sessions or technical deliverables arranged with prior notice.
Key Responsibilities

• Provide technical guidance and hands-on support for native iOS applications.
• Design, review, and troubleshoot Swift-based solutions.
• Support mobile application integration with hardware and IoT devices.
• Work with Bluetooth and Bluetooth Low Energy communication.
• Support UDS message exchange and device diagnostic processes.
• Provide guidance on over-the-air firmware and software updates.
• Diagnose issues across mobile, connectivity, firmware, and hardware layers.
• Review technical architecture and recommend practical solutions.
• Collaborate with mobile, backend, hardware, and product teams.
• Document technical recommendations and solutions when required.