iOS Developer

This is a role that TechTree is recruiting for on behalf of one of our clients. TechTree is an AI-driven recruitment platform working with high-growth companies.

When you apply, our AI Agent matches you not just to this role , but to other relevant opportunities across our network, so one application can unlock multiple roles. iOS Developer — hands-on engineering on a fast-growing consumer app where anyone can make a playable game from one prompt.

On-site, Sofia. A backed consumer startup building a new category between social video and gaming: a mobile feed of playable games that users scroll, play instantly and create themselves from a single text prompt. The product is live on the App Store and growing fast.

This is a hands-on iOS role with no management. You'll build and ship features in the native iOS app alongside the existing iOS engineer, working closely with Android, backend (Go), product and design.

What You'll Do → Build new features across the app, from onboarding to the feed to game creation

→ Keep scrolling, game loading and playback fast and stable

→ Work with the Android engineer so features ship on both platforms

→ Integrate analytics and support A/B testing

→ Handle App Store releases and compliance updates

What We're Looking For → 3–5 years of professional iOS development

→ Strong Swift, with SwiftUI and/or UIKit

→ Apps shipped and maintained in the App Store

→ A solid grasp of performance, memory and networking on iOS

→ Good English for working with the London team

→ Based in Sofia or able to relocate within about a month; EU citizenship or an existing Bulgarian / Schengen visa (no sponsorship)

Big plus: B2C experience (short-form video, social feeds, games or creator tools), WKWebView or embedding web games in native apps, analytics/attribution SDKs (e.g. Singular) and A/B testing.

€6,000–€6,250 gross per month. Full-time employment contract, 20 days paid leave. On-site in Sofia with 2 remote days per month and flexible hours (core 10:00–16:00).

Three-step process: intro call, technical interview, final round with leadership.

What is TechTree? TechTree combines AI agents with a human support team to give candidates a better, more transparent hiring experience.

Our AI Agent gets to know your background, experience, and what you're optimising for. It continuously matches you to live roles across our network where there's genuine alignment, not just keyword overlap. Our Human Team is there to support you through the process — answering questions, adding context, and making sure you're never left guessing or ghosted.

We only post real jobs. Every role on TechTree is a live, active hire.