Application Security Engineer

Madfish; United Kingdom; Remote; GBP 70,000 - 90,000; Full time

Job summary

A tech recruitment partner is seeking an Application Security Engineer to work on cutting-edge biometrics and identity orchestration. The role involves leading security reviews for mobile platforms and collaborating with development teams. Candidates should have at least 6 years of experience in mobile security and a strong grasp of both Android and iOS internals. The position offers a flexible work schedule and employee-friendly policies.

Benefits

Flexible working schedule

18 vacation days per year

Free English classes with native speakers

Qualifications

• 6+ years of hands-on experience in mobile security.
• Experience with threat modeling and attack surfaces.
• Deep familiarity with mobile operating systems internals.

Responsibilities

• Lead security reviews across iOS and Android.
• Collaborate with security researchers and backend engineers.
• Implement advanced security solutions for client apps.

Skills

Mobile security for Android and iOS

Security solutions development

Ownership and problem-solving

Upper-intermediate English

Job description

Overview

Our Partner, who connects exceptional tech talent with leading companies across Israel, the USA, Great Britain, and Western Europe is looking for a Application Security Engineer. You’ll be working at the intersection of cutting‑edge biometrics, behavioral analytics, and next‑gen identity orchestration – helping the world’s leading brands safeguard millions of users.

Main Responsibilities

• Lead security reviews across both iOS and Android, with a strong understanding of the low‑level capabilities of the operating systems.
• Research and explore mobile OS internals, including system services, security mechanisms, and data collection points across both Android and iOS.
• Stay up‑to‑date with the latest platform changes, OS versions, and security enhancements.
• Collaborate closely with security researchers and backend engineers to design and implement advanced security solutions.
• Work in a team developing developer‑centric products, enabling seamless integration into clients’ apps across industries such as banking.

Mandatory Requirements

• At least 6 years of hands‑on experience in mobile security for Android and iOS.
• Experience developing security solutions for mobile platforms (threat modeling, attack surfaces, RASP, root/jailbreak detection, anti‑tampering, etc.).
• Profound understanding of mobile operating systems, including: Application lifecycle management; Resource management and performance optimization; Deep familiarity with OS internals (memory, threading, security models).
• A strong sense of ownership, independence, and problem‑solving skills; you get things done.
• Upper‑intermediate English level.

As a plus:

• Strong experience with mobile security for SDKs, preferably used by third‑party developers and large‑scale organizations.
• Deep understanding of trusted hardware components (TEE, Secure Enclave, KeyStore).

We offer

• People‑oriented management without bureaucracy;
• The friendly climate inside the company is confirmed by the frequent comeback of previous employees;
• Flexible working schedule;
• 18 vacation working days per year, plus all national holidays;
• 10 sick leave days;
• Free English classes with native speakers;
• Dedicated HR;

OUR STEPS:

• ✅ Intro call with a Recruiter
• ✅ Client tech interview
• ✅ Tech interview with livecoding
• ✅ HR client interview
• ✅ Offer