Tech Lead iOS - Build Secure Web3 Wallet & AI Tools

1inch Network; Polska; On-site; PLN 180,000 - 300,000; Full time

Job summary

1inch Network seeks a Tech Lead, iOS to own and evolve the Wallet iOS application. You will drive architecture, CI/CD, and secure release practices, delivering wallet features in collaboration with Product, Android, Backend, and QA teams.

You will work on DeFi wallet capabilities, integrate with blockchain networks, and apply AI-assisted development and testing tools while maintaining a strong focus on reliability and security.

Qualifications

• Strong hands-on iOS development experience with Swift and production apps.
• Experience with Web3 wallets or DeFi apps and blockchain network integration.
• Experience with iOS build and CI/CD workflows and production monitoring.
• Ability to make architectural decisions for an iOS app and communicate trade-offs clearly.
• Comfortable owning the iOS app independently and collaborating with Product, Android and QA.

Responsibilities

• Own the iOS architecture and technical direction for the Wallet app.
• Build modular, testable components and guide implementation across wallet flows.
• Implement wallet features and technical improvements across the iOS app.
• Integrate iOS with backend services and blockchain networks.
• Coordinate with Product, Android, Backend, Blockchain, and QA on API integrations and test coverage.
• Leverage AI-assisted tools thoughtfully and ensure security and quality.

Skills

Swift

iOS development

CI/CD

Architecture decisions

Cross-functional collaboration

Web3 wallet

Security awareness

Tools

UIKit

SwiftUI

AI-assisted tools

Job description

1inch is the DeFi ecosystem building financial freedom for everyone. 1inch products help users and builders trade, hold and track digital assets - with the self-custody, comprehensive security and the intuitive user experience they need to unlock the potential of true crypto ownership. 1inch protocols and APIs provide core infrastructure across the DeFi industry and beyond. So if you're someone who thinks big, moves fast and wants to make an impact right from day one, then get ready to join our industry-changing team.

The Role

As Tech Lead, iOS, you’ll be the primary technical owner of the 1inch Wallet iOS application. This is a hands-on individual contributor role with no direct people management responsibilities. You’ll own the app’s architecture and development, improve its CI/CD workflow and monitor it after release. You’ll work on wallet features including perpetual trading, prediction markets and DeFi staking, collaborating with the Product Owner, Android Lead and QA. You’ll also use AI-assisted tools in development and testing, applying sound engineering judgement to the code and tests they generate.

What you’ll do

• Own the iOS architecture and technical direction, balancing feature delivery, maintainability, performance and security.
• Build and improve modular, testable application components, and guide implementation across complex wallet flows.
• Implement wallet features and technical improvements across the iOS application.
• Integrate the application with backend services, blockchain networks and related wallet services.
• Work with Product, Android, Backend, Blockchain and QA on shared product behaviour, API integrations, test coverage and defect investigation
• Use AI-assisted tools in development and testing, reviewing and validating their output against engineering, quality and security standards.
• Protect sensitive information by keeping private keys, recovery phrases, credentials and user data out of AI prompts and inappropriate logs.
• Own and improve the iOS build and CI/CD workflow; monitor releases, investigate production issues and coordinate fixes and improvements to stability.

Who you are

You have strong hands-on iOS development experience with Swift, including experience building production applications.

You have practical experience working on a Web3 product, such as a wallet, DeFi application or product integrating with blockchain networks, and an understanding of crypto and trading.

You have experience with iOS build and CI/CD workflows and monitoring production applications.

You have experience making technical and architecture decisions for an iOS application.

You communicate technical trade-offs clearly and work well with Product, Android and QA.

You are comfortable taking ownership of the iOS application while working independently as its primary iOS technical owner.

You are pragmatic: you can move quickly while keeping reliability, security and maintainability in mind.

You use AI tools thoughtfully, question their output and take responsibility for the code you deliver.

Nice to haves

Experience building or maintaining a non-custodial wallet.

Experience with transaction signing, wallet recovery or transaction lifecycle flows.

Experience building modular, testable applications and handling asynchronous operations and network failures.

Experience with security-sensitive mobile functionality, mobile security reviews or incident response.

Hands-on experience with UIKit or SwiftUI; experience with both is not required.