iOS Engineer (Swift) – Stealth Technology Start-Up

twentyAI; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Well-Funded, Stealth-Mode Start-Up in London is seeking an experienced iOS Engineer to design, build and deliver a high-quality native iOS app from the ground up. You will work with product and design to translate concepts into polished mobile experiences, taking ownership from architecture through to release.

We value strong Swift expertise, an eye for UI/UX, and the ability to work autonomously in a fast-paced startup.

Qualifications

• Strong hands-on experience with Swift and native iOS development.
• Proven ability to translate designs into polished, user-centric iOS apps.
• Comfortable taking ownership from design to delivery.
• Able to work autonomously in a fast-paced startup environment.

Responsibilities

• Design, develop and deliver high-quality native iOS applications using Swift.
• Translate product concepts and UI/UX designs into polished, intuitive mobile experiences.
• Take ownership of iOS development, from initial design through to implementation and delivery.
• Collaborate with product, design and engineering teams to build and iterate rapidly.
• Maintain high standards of code quality, performance and user experience.
• Contribute to technical and product decisions within a fast-moving startup.

Skills

Swift

iOS Development

UI/UX

Ownership

Independent work

Job description

Company: Well-Funded, Stealth-Mode Start-Up

Engagement Overview

We are partnering with a well-funded, stealth-mode technology start-up looking to appoint a talented iOS Engineer to join its London-based team immediately.

This is an exciting opportunity to join an ambitious business at an early stage, playing a key role in designing, developing and delivering a high-quality iOS product from the ground up.

The environment is fast-paced, entrepreneurial and highly demanding, with a strong emphasis on technical excellence, exceptional design and rapid execution.

Key Responsibilities

• Design, develop and deliver high-quality native iOS applications using Swift.
• Translate product concepts and UI/UX designs into polished, intuitive mobile experiences.
• Take ownership of iOS development, from initial design through to implementation and delivery.
• Collaborate closely with product, design and engineering teams to build and iterate rapidly.
• Maintain exceptionally high standards of code quality, performance and user experience.
• Contribute to technical and product decisions within an evolving start-up environment.

Key Requirements

• Strong hands-on experience with Swift and native iOS development.
• Design-oriented engineering background, with excellent attention to UI/UX and visual detail.
• Demonstrable experience building polished, user-centric iOS applications.
• Comfortable working independently, taking ownership and delivering at pace.
• Adaptable, commercially minded and excited by early-stage product development.
• Available to start immediately and work in London.

Years of experience are not a deciding factor.

We are prioritising technical ability, design sensibility, attitude and the ability to deliver.

This is a high-performance start-up with ambitious goals, demanding timelines and a team that is fully committed to building an exceptional product. Central London office

Working hours can be long, and the environment will suit individuals who enjoy intensity, autonomy, rapid decision-making and significant personal ownership.