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Hi! I’m a mobile and backend engineer who loves building clean, low-latency iOS experiences and shipping products that actually move business metrics. I’ve built and maintained multiple iOS apps end-to-end—from MVP through App Store deployment—reaching 4,000+ monthly active users, and I enjoy working deeply across Swift, Core ML pipelines, and custom UI architecture. I specialize in turning product ideas into reliable, production-ready features, from secure authentication and subscription flows to realtime computer-vision and pose/object detection for real-world fitness use cases. Along the way, I’ve optimized performance, memory, and frame rates, and worked in roles ranging from independent iOS development to CTO/contract leadership and early-stage startup collaboration—always focused on shipping fast without sacrificing quality.…Hi! I’m a mobile and backend engineer who loves building clean, low-latency iOS experiences and shipping products that actually move business metrics. I’ve built and maintained multiple iOS apps end-to-end—from MVP through App Store deployment—reaching 4,000+ monthly active users, and I enjoy working deeply across Swift, Core ML pipelines, and custom UI architecture. I specialize in turning product ideas into reliable, production-ready features, from secure authentication and subscription flows to realtime computer-vision and pose/object detection for real-world fitness use cases. Along the way, I’ve optimized performance, memory, and frame rates, and worked in roles ranging from independent iOS development to CTO/contract leadership and early-stage startup collaboration—always focused on shipping fast without sacrificing quality.

Ilyes Ben Hajdahmane Ben Guerir

App Developer, Front-End Developer, Back-End Developer, +3

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Hi! I’m a mobile and backend engineer who loves building clean, low-latency iOS experiences and shipping products that actually move business metrics. I’ve built and maintained multiple iOS apps end-to-end—from MVP through App Store deployment—reaching 4,000+ monthly active users, and I enjoy working deeply across Swift, Core ML pipelines, and custom UI architecture. I specialize in turning product ideas into reliable, production-ready features, from secure authentication and subscription flows to realtime computer-vision and pose/object detection for real-world fitness use cases. Along the way, I’ve optimized performance, memory, and frame rates, and worked in roles ranging from independent iOS development to CTO/contract leadership and early-stage startup collaboration—always focused on shipping fast without sacrificing quality.…Hi! I’m a mobile and backend engineer who loves building clean, low-latency iOS experiences and shipping products that actually move business metrics. I’ve built and maintained multiple iOS apps end-to-end—from MVP through App Store deployment—reaching 4,000+ monthly active users, and I enjoy working deeply across Swift, Core ML pipelines, and custom UI architecture. I specialize in turning product ideas into reliable, production-ready features, from secure authentication and subscription flows to realtime computer-vision and pose/object detection for real-world fitness use cases. Along the way, I’ve optimized performance, memory, and frame rates, and worked in roles ranging from independent iOS development to CTO/contract leadership and early-stage startup collaboration—always focused on shipping fast without sacrificing quality.

Available to hire

Hi! I’m a mobile and backend engineer who loves building clean, low-latency iOS experiences and shipping products that actually move business metrics. I’ve built and maintained multiple iOS apps end-to-end—from MVP through App Store deployment—reaching 4,000+ monthly active users, and I enjoy working deeply across Swift, Core ML pipelines, and custom UI architecture.

I specialize in turning product ideas into reliable, production-ready features, from secure authentication and subscription flows to realtime computer-vision and pose/object detection for real-world fitness use cases. Along the way, I’ve optimized performance, memory, and frame rates, and worked in roles ranging from independent iOS development to CTO/contract leadership and early-stage startup collaboration—always focused on shipping fast without sacrificing quality.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

Arabic

Fluent

English

Advanced

French

Advanced

Work Experience

Developer / Project Lead at Rep Unlock

January 1, 2026 - Present

iOS mobile application that gamifies screen time reduction by requiring users to complete physical exercises to unlock locked apps. Built a real-time motion tracking system using machine learning to accurately check and count exercises on the device. Integrated analytics, onboarding funnels, and payments.

CTO / Contract Developer at Health-tech startup (Danish)

January 1, 2025 - Present

Led infrastructure overhauls and removed system bottlenecks to support 7,000+ daily active users, driving 7x revenue growth over a 2-month contract. Executed critical performance optimizations and bug fixes, contributing directly to the revenue increase. Owned the end-to-end technical lifecycle by resolving stability issues and delivering a production-ready mobile environment.

Product Developer / Founder at Archery Buddy

January 1, 2025 - February 28, 2025

Built and launched a cross-platform mobile app (iOS/Android) for archers using React Native. Integrated a Machine Learning model (MediaPipe) to analyze archer form and provide detailed, real-time feedback. Designed the React Native architecture and Supabase back-end to manage user data, sessions, and subscriptions.

Chief Technology Officer at Scanfit

January 1, 2025 - February 28, 2025

Managed and upgraded the app's infrastructure, fixed critical bugs, scaled the platform, handled 7,000 daily active users, and increased app revenue by 10x after the first major update.

Co-founder / Mobile Developer at Sportify AI

January 1, 2024 - December 31, 2024

Built an MVP for an AI fitness app that tracks workouts, counts reps, and shows user progress. Collaborated across product, mobile development, AI features, and user testing in a small startup team. The company was selected as one of 12 startups from 400 applicants for the inwidays SportTech event.

Independent iOS Developer

January 1, 2024 - Present

Architected, published, and maintained 5 iOS applications serving 4,000+ monthly active users, covering the full lifecycle from MVP to App Store deployment. Engineered robust backends using Supabase and RESTful JSON APIs; integrated StoreKit 2 for optimized subscription flows, dynamic paywalls, and secure authentication. Implemented real-time computer vision and object/pose detection using Core ML and AVFoundation for AI-assisted fitness tracking and movement analysis. Optimized runtime performance, memory footprint, and frame rates through iterative releases, debugging, and App Store Connect-driven production enhancements and bug fixes.

Mobile Developer at Early-stage startup projects

January 1, 2023 - December 31, 2024

Worked with early-stage startup teams on mobile features using SwiftUI and React Native, contributing to API integrations and production bug fixes. Partnered directly with founders and designers to turn product ideas into clear, working features and ship updates quickly.