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Яков Штеффен

@0007336

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Engineering Team Lead at HeadHunter who built a mobile team and adapted its app for Asian markets.

Russian Federation

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At HeadHunter, I worked on an expert marketplace, chat, calls, payments, growth experiments, and AI functionality. I developed mobile client features and integrated SDKs.

I built a mobile development team from scratch, participated in hiring and onboarding, and coordinated delivery. I also led the app’s adaptation for Asian markets, including localization, registration, and payments.

At Termius, I developed and reviewed production code, tested the app, and prepared releases. I worked with Swift, Objective-C, RxSwift, CoreData, RxFeedback, and SwiftUI.

At BlackBricks, I developed mobile applications and translated client requirements into development tasks. Earlier, as an Engineer at Sibneftetransproekt, I maintained and repaired printing equipment and prepared project documentation for clients.

Experience

Work history, roles, and key accomplishments

Engineering Team Lead

HeadHunter

Jan 2022 - Jul 2026 (4 years 6 months)

Progressed from iOS Engineer to Mobile Engineering Team Lead. Led development of mobile features including expert marketplace, chat, calls, payments, growth experiments, and AI functionality, and built a mobile development team from scratch.

iOS Mobile Development Team Leadership Technical Hiring Onboarding Localization SDK Integration Authentication Payments

iOS Engineer

Termius

May 2020 - Dec 2021 (1 year 7 months)

Developed and reviewed production code, prepared releases, and performed testing for Termius, a developer-focused application ranked among top apps in the App Store's Developer Tools category.

Swift Objective C RxSwift Core Data RxFeedback SwiftUI Code Review Testing Release Management

iOS Engineer

BlackBricks

Apr 2018 - Apr 2020 (2 years)

Developed mobile applications using Swift and Objective-C, communicated with clients, translated requirements into development tasks, estimated work, distributed tasks, and performed code reviews.

Swift Objective C iOS Client Communication Task estimation Code Review

Engineer

Sibneftetransproekt

Jan 2013 - Mar 2018 (5 years 2 months)

Maintained and repaired printing equipment, configured technical equipment, worked with technical documentation, and prepared project documentation for delivery to clients.

Technical Documentation Equipment Maintenance Project Documentation