About the Project

Chrona

, in partnership with

Social Discovery Group

(a global social entertainment powerhouse recognized by FlexJobs as a Top 5 remote company), is looking for a

Seniori OS Developer

. You will join a high-growth,

AI-first B2C stealth startup

operating within the social ecosystem. The product is already live, actively scaling, and addresses the global challenges of loneliness and human connection. It serves millions of users worldwide but currently operates under NDA (not yet publicly associated with the main brand). ###

Team Dynamics & Autonomy

The mobile development team is highly autonomous and compact, consisting of 1 iOS Developer, 1 Android Developer, 2 Backend Developers, and 2 QA Engineers.

There is no Mobile Team Lead or micro-management.

Tasks come directly from Product Managers and senior stakeholders. We expect you to act as a fully independent engineering unit, capable of making architectural decisions, designing features, and managing end-to-end task decomposition. ###

**Key

Responsibilities

:**

-

Architecture & System Design

Design and discuss robust architectural solutions using SOLID principles and Clean Architecture; handle high-level feature decomposition. -

Feature Development

Extend existing functionality, integrate new features, and write clean, scalable, and highly optimized code. -

Heavy UI & Performance

Build and optimize complex, custom layouts, animations, real-time updates, and heavy media components (video/audio/images). -

AI Integration

Work closely with ML/UI integrations to deliver next-gen AI-driven user experiences. -

Production Health

Monitor system health and diagnose production issues using logs, metrics, and traces. ###

Requirements (Strict Filtering Criteria)

-

Education: A University Degree in Computer Science, Mathematics, or a related technical field is strictly mandatory.

(Graduates from top-tier technical universities are highly preferred). -

Experience: 5+ years

• of commerciali
• OS development experience. Priority is given to candidates with a background in

Big Tech

(e.g., Yandex, Sber, T-Bank) or top-tier B2C startups handling millions of active users. -

Tech Stack

Strong proficiency in

Swift, SwiftUI, RxSwift, and UIKit

. -

Expertise

Deep knowledge of multithreading, asynchronous programming, high-load systems, and custom UI components (layouts, shaders, complex animations). -

Soft Skills

Highly proactive, self-driven, with exceptional communication skills to collaborate effectively with a cross-functional team (Product, Design, QA, Backend). -

Compliance

Located in

EU or Georgia

(candidates residing in RU/BY are not considered due to compliance restrictions). Willingness to work in the

CET

timezone. ###

What We Offer

-

Time Off

28 calendar days of annual vacation +

7 Wellness Days

per year (time off for recovery or personal matters without sick leave). -

Learning & Development

Full coverage for professional training, international conferences, and English lessons. -

Health & Wellness

Health benefits up to $1,000 gross per year (for insurance or medical fees for you and close relatives). -

Workplace Setup

Home office equipment reimbursement up to $1,000 gross once every 3 years (desk, chair, Wi-Fi, co-working rent, etc.). -

Company Culture

A gamified internal gratitude system where you can exchange peer-to-peer bonuses for extra time off, merch, team activities, or certificates. ###

Interview Process

1. HR Screening Call 2. Short Technical Assignment (Test Task) 3. Presale Call with the Hiring Team 4. Deep-dive Technical Interview (1.5 hours) 5. Final Interview (System Design & Experience review)

How to Apply

Please send your English CV to

@yul\_shuk