Application Security Architect - Mobile Banking (Nedbank) 206904-1

Opensource; Gauteng; On-site; ZAR 900,000 - 1,300,000; Full time

Job summary

Opensource is seeking a Senior Security Architect to lead end-to-end mobile banking platform security architecture across iOS, Android, web, and cloud services. You will shape patterns, governance, and secure DevSecOps pipelines to balance security with customer experience.

You will drive authentication, cryptography, identity, and Zero Trust implementations, collaborating with engineering, product, risk, and compliance teams in a fast-paced fintech environment.

Qualifications

• TOGAF is required.
• Secure mobile platform architecture experience across iOS/Android/web and cloud.
• Experience with OAuth 2.0, OpenID Connect, PKCE, and secure token handling.

Responsibilities

• Own end-to-end security architecture for a large-scale mobile banking platform.
• Define and govern security across mobile apps, APIs, identity platforms, cloud infrastructure, backend services, and DevSecOps pipelines.
• Architect strong customer authentication using PINs, biometrics, device-bound keys, and transaction-level authorization.
• Lead threat modelling across onboarding, authentication, payments, and data lifecycle controls.

Skills

Mobile security

iOS security

Android security

Secure storage

Platform security models

Jailbreak/root detection

Hardening

Secure local data handling

Mobile threat defense

PIN-based authentication

Biometrics

Device-bound credentials

Step-up authentication

Adaptive authentication

Risk-based authentication

Transaction-level authorization

OAuth 2.0

OpenID Connect

PKCE

Secure token handling

Secure session management

Token rotation

Device-bound sessions

Delegated authorization patterns

Cryptography

Key lifecycle management

HSM integration

Enterprise key vaults

Hardware-keystores

Secure enclave usage

Signing

Encryption

Certificate lifecycle

Cryptography

Education

TOGAF

Job description

Role Scope:

• Primary domain: Mobile banking platform security architecture across iOS, Android, web, APIs, BFF, cloud, identity, payments, data, DevSecOps, and platform services.
• Accountability: Owns security architecture direction, patterns, architecture decisions, control requirements, and governance across critical customer journeys.
• Stakeholders: Engineering, product, platform teams, cybersecurity, risk, fraud, compliance, privacy, operations, infrastructure, and executive technology leadership.
• Delivery model: Works across agile delivery squads and architecture governance forums to balance security, customer experience, resilience, and delivery velocity.

Duties and Responsibilities:

• Own the end-to-end security architecture for a large-scale, customer-facing mobile banking platform.
• Define and govern security across mobile apps, APIs, identity platforms, cloud infrastructure, backend services, shared platforms, and DevSecOps pipelines.
• Architect strong customer authentication using PIN, biometrics, device-bound cryptographic keys, risk context, and transaction-level authorization.
• Design PIN-based authentication models where PINs unlock cryptographic keys and are never stored or transmitted.
• Define biometric-first authentication using Face ID, Touch ID, and platform biometrics through secure enclave and hardware-backed mechanisms.
• Govern secure use of mobile keystores and secure enclaves, including iOS Secure Enclave and Android Hardware Keystore.
• Ensure biometrics are used only for local cryptographic key release and never treated as raw credentials.
• Define integration with enterprise key vaults and HSMs for signing, encryption, certificate handling, and key lifecycle management.
• Own OAuth 2.0, OpenID Connect, PKCE, secure token storage, token rotation, and device-bound session models for mobile and web channels.
• Define API, Backend-for-Frontend, and service security patterns aligned to Zero Trust principles.
• Lead threat modelling across onboarding, authentication, payments, card management, account servicing, and other sensitive customer retirement, and data lifecycle controls.

Required Qualifications:

TOGAF

Skills:

Mobile security, iOS and Android application security, secure storage, platform security models, jailbreak/root detection, hardening, secure local data handling, mobile threat defense, and mobile application, Authentication PIN-based authentication, biometrics, device-bound credentials, step-up authentication, adaptive authentication, risk-based authentication, and transaction-level authorization., Identity and access OAuth 2.0, OpenID Connect, PKCE, secure token handling, secure session management, token rotation, device-bound sessions, and delegated authorization patterns., Cryptography Cryptographic key lifecycle management, HSM integration, enterprise key vaults, hardware-backed keystores, secure enclave usage, signing, encryption, certificate lifecycle, and cryptography.

Fraud and Risk:

Device binding, device attestation, account takeover prevention, transaction risk scoring, behavioral analytics, fraud platform integration, and high-risk transaction controls.